private void ExportMaterial(BabylonMaterial babylonMaterial, GLTF gltf)
{
var name = babylonMaterial.name;
var id = babylonMaterial.id;
RaiseMessage("GLTFExporter.Material | Export material named: " + name, 1);
if (babylonMaterial.GetType() == typeof(BabylonStandardMaterial))
{
var babylonStandardMaterial = babylonMaterial as BabylonStandardMaterial;
// --- prints ---
RaiseMessage("GLTFExporter.Material | babylonMaterial data", 2);
RaiseMessage("GLTFExporter.Material | babylonMaterial.alpha=" + babylonMaterial.alpha, 3);
RaiseMessage("GLTFExporter.Material | babylonMaterial.alphaMode=" + babylonMaterial.alphaMode, 3);
RaiseMessage("GLTFExporter.Material | babylonMaterial.backFaceCulling=" + babylonMaterial.backFaceCulling, 3);
RaiseMessage("GLTFExporter.Material | babylonMaterial.wireframe=" + babylonMaterial.wireframe, 3);
// Ambient
for (int i = 0; i < babylonStandardMaterial.ambient.Length; i++)
{
RaiseMessage("GLTFExporter.Material | babylonStandardMaterial.ambient[" + i + "]=" + babylonStandardMaterial.ambient[i], 3);
}
// Diffuse
RaiseMessage("GLTFExporter.Material | babylonStandardMaterial.diffuse.Length=" + babylonStandardMaterial.diffuse.Length, 3);
for (int i = 0; i < babylonStandardMaterial.diffuse.Length; i++)
{
RaiseMessage("GLTFExporter.Material | babylonStandardMaterial.diffuse[" + i + "]=" + babylonStandardMaterial.diffuse[i], 3);
}
if (babylonStandardMaterial.diffuseTexture == null)
{
RaiseMessage("GLTFExporter.Material | babylonStandardMaterial.diffuseTexture=null", 3);
}
// Normal / bump
if (babylonStandardMaterial.bumpTexture == null)
{
RaiseMessage("GLTFExporter.Material | babylonStandardMaterial.bumpTexture=null", 3);
}
// Specular
for (int i = 0; i < babylonStandardMaterial.specular.Length; i++)
{
RaiseMessage("GLTFExporter.Material | babylonStandardMaterial.specular[" + i + "]=" + babylonStandardMaterial.specular[i], 3);
}
RaiseMessage("GLTFExporter.Material | babylonStandardMaterial.specularPower=" + babylonStandardMaterial.specularPower, 3);
// Occlusion
if (babylonStandardMaterial.ambientTexture == null)
{
RaiseMessage("GLTFExporter.Material | babylonStandardMaterial.ambientTexture=null", 3);
}
// Emissive
for (int i = 0; i < babylonStandardMaterial.emissive.Length; i++)
{
RaiseMessage("GLTFExporter.Material | babylonStandardMaterial.emissive[" + i + "]=" + babylonStandardMaterial.emissive[i], 3);
}
if (babylonStandardMaterial.emissiveTexture == null)
{
RaiseMessage("GLTFExporter.Material | babylonStandardMaterial.emissiveTexture=null", 3);
}
// --------------------------------
// --------- gltfMaterial ---------
// --------------------------------
RaiseMessage("GLTFExporter.Material | create gltfMaterial", 2);
var gltfMaterial = new GLTFMaterial
{
name = name
};
gltfMaterial.id = babylonMaterial.id;
gltfMaterial.index = gltf.MaterialsList.Count;
gltf.MaterialsList.Add(gltfMaterial);
// Alpha
string alphaMode;
float? alphaCutoff;
getAlphaMode(babylonStandardMaterial, out alphaMode, out alphaCutoff);
gltfMaterial.alphaMode = alphaMode;
gltfMaterial.alphaCutoff = alphaCutoff;
// DoubleSided
gltfMaterial.doubleSided = !babylonMaterial.backFaceCulling;
// Normal
gltfMaterial.normalTexture = ExportTexture(babylonStandardMaterial.bumpTexture, gltf);
// Occulison
gltfMaterial.occlusionTexture = ExportTexture(babylonStandardMaterial.ambientTexture, gltf);
// Emissive
gltfMaterial.emissiveFactor = babylonStandardMaterial.emissive;
gltfMaterial.emissiveTexture = ExportTexture(babylonStandardMaterial.emissiveTexture, gltf);
// --------------------------------
// --- gltfPbrMetallicRoughness ---
// --------------------------------
RaiseMessage("GLTFExporter.Material | create gltfPbrMetallicRoughness", 2);
var gltfPbrMetallicRoughness = new GLTFPBRMetallicRoughness();
gltfMaterial.pbrMetallicRoughness = gltfPbrMetallicRoughness;
// --- Global ---
SpecularGlossiness _specularGlossiness = new SpecularGlossiness
{
diffuse = new BabylonColor3(babylonStandardMaterial.diffuse),
opacity = babylonMaterial.alpha,
specular = new BabylonColor3(babylonStandardMaterial.specular),
glossiness = babylonStandardMaterial.specularPower / 256
};
MetallicRoughness _metallicRoughness = ConvertToMetallicRoughness(_specularGlossiness, true);
// Base color
gltfPbrMetallicRoughness.baseColorFactor = new float[4]
{
_metallicRoughness.baseColor.r,
_metallicRoughness.baseColor.g,
_metallicRoughness.baseColor.b,
_metallicRoughness.opacity
};
// Metallic roughness
gltfPbrMetallicRoughness.metallicFactor = _metallicRoughness.metallic;
gltfPbrMetallicRoughness.roughnessFactor = _metallicRoughness.roughness;
// --- Textures ---
if (babylonStandardMaterial.diffuseTexture != null)
{
Func <string, Bitmap> loadTextureFromOutput = delegate(string textureName)
{
return(LoadTexture(Path.Combine(gltf.OutputFolder, textureName)));
};
Bitmap diffuseBitmap = loadTextureFromOutput(babylonStandardMaterial.diffuseTexture.name);
if (diffuseBitmap != null)
{
Bitmap specularBitmap = null;
if (babylonStandardMaterial.specularTexture != null)
{
specularBitmap = loadTextureFromOutput(babylonStandardMaterial.specularTexture.name);
}
Bitmap opacityBitmap = null;
if (babylonStandardMaterial.diffuseTexture.hasAlpha == false && babylonStandardMaterial.opacityTexture != null)
{
opacityBitmap = loadTextureFromOutput(babylonStandardMaterial.opacityTexture.name);
}
// Retreive dimensions
int width = 0;
int height = 0;
var haveSameDimensions = _getMinimalBitmapDimensions(out width, out height, diffuseBitmap, specularBitmap, opacityBitmap);
if (!haveSameDimensions)
{
RaiseWarning("Diffuse, specular and opacity maps should have same dimensions", 2);
}
// Create base color and metallic+roughness maps
Bitmap baseColorBitmap = new Bitmap(width, height);
Bitmap metallicRoughnessBitmap = new Bitmap(width, height);
var hasAlpha = false;
for (int x = 0; x < width; x++)
{
for (int y = 0; y < height; y++)
{
var diffuse = diffuseBitmap.GetPixel(x, y);
SpecularGlossiness specularGlossinessTexture = new SpecularGlossiness
{
diffuse = new BabylonColor3(diffuse),
opacity = babylonStandardMaterial.diffuseTexture.hasAlpha? diffuse.A / 255.0f :
opacityBitmap != null && babylonStandardMaterial.opacityTexture.getAlphaFromRGB ? opacityBitmap.GetPixel(x, y).R / 255.0f :
opacityBitmap != null && babylonStandardMaterial.opacityTexture.getAlphaFromRGB == false?opacityBitmap.GetPixel(x, y).A / 255.0f :
1,
specular = specularBitmap != null ? new BabylonColor3(specularBitmap.GetPixel(x, y)) :
new BabylonColor3(),
glossiness = babylonStandardMaterial.useGlossinessFromSpecularMapAlpha && specularBitmap != null?specularBitmap.GetPixel(x, y).A / 255.0f :
0
};
var displayPrints = x == width / 2 && y == height / 2;
MetallicRoughness metallicRoughnessTexture = ConvertToMetallicRoughness(specularGlossinessTexture, displayPrints);
Color colorBase = Color.FromArgb(
(int)(metallicRoughnessTexture.opacity * 255),
(int)(metallicRoughnessTexture.baseColor.r * 255),
(int)(metallicRoughnessTexture.baseColor.g * 255),
(int)(metallicRoughnessTexture.baseColor.b * 255)
);
baseColorBitmap.SetPixel(x, y, colorBase);
if (metallicRoughnessTexture.opacity != 1)
{
hasAlpha = true;
}
// The metalness values are sampled from the B channel.
// The roughness values are sampled from the G channel.
// These values are linear. If other channels are present (R or A), they are ignored for metallic-roughness calculations.
Color colorMetallicRoughness = Color.FromArgb(
0,
(int)(metallicRoughnessTexture.roughness * 255),
(int)(metallicRoughnessTexture.metallic * 255)
);
metallicRoughnessBitmap.SetPixel(x, y, colorMetallicRoughness);
}
}
// Export maps and textures
var baseColorFileName = babylonMaterial.name + "_baseColor" + (hasAlpha ? ".png" : ".jpg");
gltfPbrMetallicRoughness.baseColorTexture = ExportBitmapTexture(babylonStandardMaterial.diffuseTexture, baseColorBitmap, baseColorFileName, gltf);
if (specularBitmap != null)
{
gltfPbrMetallicRoughness.metallicRoughnessTexture = ExportBitmapTexture(babylonStandardMaterial.diffuseTexture, metallicRoughnessBitmap, babylonMaterial.name + "_metallicRoughness" + ".jpg", gltf);
}
}
}
}
else if (babylonMaterial.GetType() == typeof(BabylonPBRMetallicRoughnessMaterial))
{
var babylonPBRMetallicRoughnessMaterial = babylonMaterial as BabylonPBRMetallicRoughnessMaterial;
// --- prints ---
RaiseMessage("GLTFExporter.Material | babylonMaterial data", 2);
RaiseMessage("GLTFExporter.Material | babylonMaterial.alpha=" + babylonMaterial.alpha, 3);
RaiseMessage("GLTFExporter.Material | babylonMaterial.alphaMode=" + babylonMaterial.alphaMode, 3);
RaiseMessage("GLTFExporter.Material | babylonMaterial.backFaceCulling=" + babylonMaterial.backFaceCulling, 3);
RaiseMessage("GLTFExporter.Material | babylonMaterial.wireframe=" + babylonMaterial.wireframe, 3);
// Global
RaiseMessage("GLTFExporter.Material | babylonPBRMetallicRoughnessMaterial.maxSimultaneousLights=" + babylonPBRMetallicRoughnessMaterial.maxSimultaneousLights, 3);
RaiseMessage("GLTFExporter.Material | babylonPBRMetallicRoughnessMaterial.disableLighting=" + babylonPBRMetallicRoughnessMaterial.disableLighting, 3);
RaiseMessage("GLTFExporter.Material | babylonPBRMetallicRoughnessMaterial.alphaCutOff=" + babylonPBRMetallicRoughnessMaterial.alphaCutOff, 3);
RaiseMessage("GLTFExporter.Material | babylonPBRMetallicRoughnessMaterial.transparencyMode=" + babylonPBRMetallicRoughnessMaterial.transparencyMode, 3);
RaiseMessage("GLTFExporter.Material | babylonPBRMetallicRoughnessMaterial.doubleSided=" + babylonPBRMetallicRoughnessMaterial.doubleSided, 3);
// Base color
RaiseMessage("GLTFExporter.Material | babylonPBRMetallicRoughnessMaterial.baseColor.Length=" + babylonPBRMetallicRoughnessMaterial.baseColor.Length, 3);
for (int i = 0; i < babylonPBRMetallicRoughnessMaterial.baseColor.Length; i++)
{
RaiseMessage("GLTFExporter.Material | babylonPBRMetallicRoughnessMaterial.baseColor[" + i + "]=" + babylonPBRMetallicRoughnessMaterial.baseColor[i], 3);
}
if (babylonPBRMetallicRoughnessMaterial.baseTexture == null)
{
RaiseMessage("GLTFExporter.Material | babylonPBRMetallicRoughnessMaterial.baseTexture=null", 3);
}
// Metallic+roughness
RaiseMessage("GLTFExporter.Material | babylonPBRMetallicRoughnessMaterial.metallic=" + babylonPBRMetallicRoughnessMaterial.metallic, 3);
RaiseMessage("GLTFExporter.Material | babylonPBRMetallicRoughnessMaterial.roughness=" + babylonPBRMetallicRoughnessMaterial.roughness, 3);
if (babylonPBRMetallicRoughnessMaterial.metallicRoughnessTexture == null)
{
RaiseMessage("GLTFExporter.Material | babylonPBRMetallicRoughnessMaterial.metallicRoughnessTexture=null", 3);
}
// Environment
if (babylonPBRMetallicRoughnessMaterial.environmentTexture == null)
{
RaiseMessage("GLTFExporter.Material | babylonPBRMetallicRoughnessMaterial.environmentTexture=null", 3);
}
// Normal / bump
if (babylonPBRMetallicRoughnessMaterial.normalTexture == null)
{
RaiseMessage("GLTFExporter.Material | babylonPBRMetallicRoughnessMaterial.normalTexture=null", 3);
}
RaiseMessage("GLTFExporter.Material | babylonPBRMetallicRoughnessMaterial.invertNormalMapX=" + babylonPBRMetallicRoughnessMaterial.invertNormalMapX, 3);
RaiseMessage("GLTFExporter.Material | babylonPBRMetallicRoughnessMaterial.invertNormalMapY=" + babylonPBRMetallicRoughnessMaterial.invertNormalMapY, 3);
// Emissive
for (int i = 0; i < babylonPBRMetallicRoughnessMaterial.emissiveColor.Length; i++)
{
RaiseMessage("GLTFExporter.Material | babylonPBRMetallicRoughnessMaterial.emissiveColor[" + i + "]=" + babylonPBRMetallicRoughnessMaterial.emissiveColor[i], 3);
}
if (babylonPBRMetallicRoughnessMaterial.emissiveTexture == null)
{
RaiseMessage("GLTFExporter.Material | babylonPBRMetallicRoughnessMaterial.emissiveTexture=null", 3);
}
// Ambient occlusion
RaiseMessage("GLTFExporter.Material | babylonPBRMetallicRoughnessMaterial.occlusionStrength=" + babylonPBRMetallicRoughnessMaterial.occlusionStrength, 3);
if (babylonPBRMetallicRoughnessMaterial.occlusionTexture == null)
{
RaiseMessage("GLTFExporter.Material | babylonPBRMetallicRoughnessMaterial.occlusionTexture=null", 3);
}
// --------------------------------
// --------- gltfMaterial ---------
// --------------------------------
RaiseMessage("GLTFExporter.Material | create gltfMaterial", 2);
var gltfMaterial = new GLTFMaterial
{
name = name
};
gltfMaterial.id = babylonMaterial.id;
gltfMaterial.index = gltf.MaterialsList.Count;
gltf.MaterialsList.Add(gltfMaterial);
// Alpha
string alphaMode;
float? alphaCutoff;
getAlphaMode(babylonPBRMetallicRoughnessMaterial, out alphaMode, out alphaCutoff);
gltfMaterial.alphaMode = alphaMode;
gltfMaterial.alphaCutoff = alphaCutoff;
// DoubleSided
gltfMaterial.doubleSided = babylonPBRMetallicRoughnessMaterial.doubleSided;
// Normal
gltfMaterial.normalTexture = ExportTexture(babylonPBRMetallicRoughnessMaterial.normalTexture, gltf);
// Occulison
gltfMaterial.occlusionTexture = ExportTexture(babylonPBRMetallicRoughnessMaterial.occlusionTexture, gltf);
// Emissive
gltfMaterial.emissiveFactor = babylonPBRMetallicRoughnessMaterial.emissiveColor;
gltfMaterial.emissiveTexture = ExportTexture(babylonPBRMetallicRoughnessMaterial.emissiveTexture, gltf);
// --------------------------------
// --- gltfPbrMetallicRoughness ---
// --------------------------------
RaiseMessage("GLTFExporter.Material | create gltfPbrMetallicRoughness", 2);
var gltfPbrMetallicRoughness = new GLTFPBRMetallicRoughness();
gltfMaterial.pbrMetallicRoughness = gltfPbrMetallicRoughness;
// --- Global ---
// Base color
gltfPbrMetallicRoughness.baseColorFactor = new float[4]
{
babylonPBRMetallicRoughnessMaterial.baseColor[0],
babylonPBRMetallicRoughnessMaterial.baseColor[1],
babylonPBRMetallicRoughnessMaterial.baseColor[2],
1.0f // TODO - alpha
};
gltfPbrMetallicRoughness.baseColorTexture = ExportTexture(babylonPBRMetallicRoughnessMaterial.baseTexture, gltf);
// Metallic roughness
gltfPbrMetallicRoughness.metallicFactor = babylonPBRMetallicRoughnessMaterial.metallic;
gltfPbrMetallicRoughness.roughnessFactor = babylonPBRMetallicRoughnessMaterial.roughness;
gltfPbrMetallicRoughness.metallicRoughnessTexture = ExportTexture(babylonPBRMetallicRoughnessMaterial.metallicRoughnessTexture, gltf);
}
else
{
RaiseWarning("GLTFExporter.Material | Unsupported material type: " + babylonMaterial.GetType(), 2);
}
}
private bool ExportMorphTargetWeightAnimation(BabylonMorphTargetManager babylonMorphTargetManager, GLTF gltf, GLTFNode gltfNode, List <GLTFChannel> channelList, List <GLTFAnimationSampler> samplerList, int startFrame, int endFrame, BabylonScene babylonScene, bool offsetToStartAtFrameZero = true)
{
if (exportedMorphTargets.Contains(babylonMorphTargetManager) || !_isBabylonMorphTargetManagerAnimationValid(babylonMorphTargetManager))
{
return(false);
}
var influencesPerFrame = _getTargetManagerAnimationsData(babylonMorphTargetManager);
var frames = new List <float>(influencesPerFrame.Keys);
var framesInRange = frames.Where(frame => frame >= startFrame && frame <= endFrame).ToList();
framesInRange.Sort(); // Mandatory to sort otherwise gltf loader of babylon doesn't understand
if (framesInRange.Count() <= 0)
{
return(false);
}
logger.RaiseMessage("GLTFExporter.Animation | Export animation of morph target manager with id: " + babylonMorphTargetManager.id, 2);
// Target
var gltfTarget = new GLTFChannelTarget
{
node = gltfNode.index
};
gltfTarget.path = "weights";
// Buffer
var buffer = GLTFBufferService.Instance.GetBuffer(gltf);
// --- Input ---
var accessorInput = GLTFBufferService.Instance.CreateAccessor(
gltf,
GLTFBufferService.Instance.GetBufferViewAnimationFloatScalar(gltf, buffer),
"accessorAnimationInput",
GLTFAccessor.ComponentType.FLOAT,
GLTFAccessor.TypeEnum.SCALAR
);
// Populate accessor
accessorInput.min = new float[] { float.MaxValue };
accessorInput.max = new float[] { float.MinValue };
int numKeys = 0;
foreach (var frame in framesInRange)
{
numKeys++;
float inputValue = frame;
if (offsetToStartAtFrameZero)
{
inputValue -= startFrame;
}
inputValue /= (float)babylonScene.TimelineFramesPerSecond;
// Store values as bytes
accessorInput.bytesList.AddRange(BitConverter.GetBytes(inputValue));
// Update min and max values
GLTFBufferService.UpdateMinMaxAccessor(accessorInput, inputValue);
}
accessorInput.count = numKeys;
if (accessorInput.count == 0)
{
logger.RaiseWarning(String.Format("GLTFExporter.Animation | No frames to export in morph target animation \"weight\" for mesh named \"{0}\". This will cause an error in the output gltf.", babylonMorphTargetManager.sourceMesh.name));
}
// --- Output ---
GLTFAccessor accessorOutput = GLTFBufferService.Instance.CreateAccessor(
gltf,
GLTFBufferService.Instance.GetBufferViewAnimationFloatScalar(gltf, buffer),
"accessorAnimationWeights",
GLTFAccessor.ComponentType.FLOAT,
GLTFAccessor.TypeEnum.SCALAR
);
// Populate accessor
foreach (var frame in framesInRange)
{
var outputValues = influencesPerFrame[frame];
// Store values as bytes
foreach (var outputValue in outputValues)
{
accessorOutput.count++;
accessorOutput.bytesList.AddRange(BitConverter.GetBytes(outputValue));
}
}
// Animation sampler
var gltfAnimationSampler = new GLTFAnimationSampler
{
input = accessorInput.index,
output = accessorOutput.index
};
gltfAnimationSampler.index = samplerList.Count;
samplerList.Add(gltfAnimationSampler);
// Channel
var gltfChannel = new GLTFChannel
{
sampler = gltfAnimationSampler.index,
target = gltfTarget
};
channelList.Add(gltfChannel);
// Mark this morph target as exported.
exportedMorphTargets.Add(babylonMorphTargetManager);
return(true);
}
private GLTFCamera ExportCamera(ref GLTFNode gltfNode, BabylonCamera babylonCamera, GLTF gltf, GLTFNode gltfParentNode)
{
RaiseMessage("GLTFExporter.Camera | Export camera named: " + babylonCamera.name, 2);
// --- prints ---
#region prints
RaiseVerbose("GLTFExporter.Camera | babylonCamera data", 3);
RaiseVerbose("GLTFExporter.Camera | babylonCamera.type=" + babylonCamera.type, 4);
RaiseVerbose("GLTFExporter.Camera | babylonCamera.fov=" + babylonCamera.fov, 4);
RaiseVerbose("GLTFExporter.Camera | babylonCamera.maxZ=" + babylonCamera.maxZ, 4);
RaiseVerbose("GLTFExporter.Camera | babylonCamera.minZ=" + babylonCamera.minZ, 4);
#endregion
// --------------------------
// ------- gltfCamera -------
// --------------------------
RaiseMessage("GLTFExporter.Camera | create gltfCamera", 3);
// Camera
var gltfCamera = new GLTFCamera {
name = babylonCamera.name
};
gltfCamera.index = gltf.CamerasList.Count;
gltf.CamerasList.Add(gltfCamera);
gltfNode.camera = gltfCamera.index;
gltfCamera.gltfNode = gltfNode;
// Camera type
switch (babylonCamera.mode)
{
case (BabylonCamera.CameraMode.ORTHOGRAPHIC_CAMERA):
var gltfCameraOrthographic = new GLTFCameraOrthographic();
gltfCameraOrthographic.xmag = 1; // Do not bother about it - still mandatory
gltfCameraOrthographic.ymag = 1; // Do not bother about it - still mandatory
gltfCameraOrthographic.zfar = babylonCamera.maxZ;
gltfCameraOrthographic.znear = babylonCamera.minZ;
gltfCamera.type = GLTFCamera.CameraType.orthographic.ToString();
gltfCamera.orthographic = gltfCameraOrthographic;
break;
case (BabylonCamera.CameraMode.PERSPECTIVE_CAMERA):
var gltfCameraPerspective = new GLTFCameraPerspective();
gltfCameraPerspective.aspectRatio = null; // Do not bother about it - use default glTF value
gltfCameraPerspective.yfov = babylonCamera.fov; // Babylon camera fov mode is assumed to be vertical (FOVMODE_VERTICAL_FIXED)
gltfCameraPerspective.zfar = babylonCamera.maxZ;
gltfCameraPerspective.znear = babylonCamera.minZ;
gltfCamera.type = GLTFCamera.CameraType.perspective.ToString();
gltfCamera.perspective = gltfCameraPerspective;
break;
default:
RaiseError("GLTFExporter.Camera | camera mode not found");
break;
}
return(gltfCamera);
}
private GLTFNode ExportAbstractMesh(ref GLTFNode gltfNode, BabylonAbstractMesh babylonAbstractMesh, GLTF gltf, GLTFNode gltfParentNode, BabylonScene babylonScene)
{
logger.RaiseMessage("GLTFExporter.AbstractMesh | Export abstract mesh named: " + babylonAbstractMesh.name, 2);
// Mesh
var gltfMesh = gltf.MeshesList.Find(_gltfMesh => _gltfMesh.idGroupInstance == babylonAbstractMesh.idGroupInstance);
if (gltfMesh != null)
{
gltfNode.mesh = gltfMesh.index;
// Skin
if (gltfMesh.idBabylonSkeleton.HasValue)
{
var babylonSkeleton = babylonScene.skeletons[gltfMesh.idBabylonSkeleton.Value];
// Export a new skeleton if necessary and a new skin
var gltfSkin = ExportSkin(babylonSkeleton, gltf, gltfNode, gltfMesh);
gltfNode.skin = gltfSkin.index;
}
}
return(gltfNode);
}
private void ExportNodeAnimation(GLTFAnimation gltfAnimation, int startFrame, int endFrame, GLTF gltf, BabylonNode babylonNode, GLTFNode gltfNode, BabylonScene babylonScene, BabylonAnimationGroup animationGroup = null)
{
var channelList = gltfAnimation.ChannelList;
var samplerList = gltfAnimation.SamplerList;
bool exportNonAnimated = exportParameters.animgroupExportNonAnimated;
// Combine babylon animations from .babylon file and cached ones
var babylonAnimations = new List <BabylonAnimation>();
if (animationGroup != null)
{
var targetedAnimations = animationGroup.targetedAnimations.Where(animation => animation.targetId == babylonNode.id);
foreach (var targetedAnimation in targetedAnimations)
{
babylonAnimations.Add(targetedAnimation.animation);
}
}
// Do not include the node animations if a provided animation group already includes them.
if (babylonAnimations.Count <= 0)
{
if (babylonNode.animations != null)
{
babylonAnimations.AddRange(babylonNode.animations);
}
if (babylonNode.extraAnimations != null)
{
babylonAnimations.AddRange(babylonNode.extraAnimations);
}
}
// Filter animations to only keep TRS ones
babylonAnimations = babylonAnimations.FindAll(babylonAnimation => _getTargetPath(babylonAnimation.property) != null);
if (babylonAnimations.Count > 0 || exportNonAnimated)
{
if (babylonAnimations.Count > 0)
{
logger.RaiseMessage("GLTFExporter.Animation | Export animations of node named: " + babylonNode.name, 2);
}
else if (exportNonAnimated)
{
logger.RaiseMessage("GLTFExporter.Animation | Export dummy animation for node named: " + babylonNode.name, 2);
// Export a dummy animation
babylonAnimations.Add(GetDummyAnimation(gltfNode, startFrame, endFrame, babylonScene));
}
foreach (BabylonAnimation babylonAnimation in babylonAnimations)
{
var babylonAnimationKeysInRange = babylonAnimation.keys.Where(key => key.frame >= startFrame && key.frame <= endFrame);
if (babylonAnimationKeysInRange.Count() <= 0)
{
continue;
}
// Target
var gltfTarget = new GLTFChannelTarget
{
node = gltfNode.index
};
gltfTarget.path = _getTargetPath(babylonAnimation.property);
// --- Input ---
var accessorInput = _createAndPopulateInput(gltf, babylonAnimation, startFrame, endFrame);
if (accessorInput == null)
{
continue;
}
// --- Output ---
GLTFAccessor accessorOutput = _createAccessorOfPath(gltfTarget.path, gltf);
// Populate accessor
int numKeys = 0;
foreach (var babylonAnimationKey in babylonAnimationKeysInRange)
{
numKeys++;
// copy data before changing it in case animation groups overlap
float[] outputValues = new float[babylonAnimationKey.values.Length];
babylonAnimationKey.values.CopyTo(outputValues, 0);
// Switch coordinate system at object level
if (babylonAnimation.property == "position")
{
outputValues[2] *= -1;
}
else if (babylonAnimation.property == "rotationQuaternion")
{
outputValues[0] *= -1;
outputValues[1] *= -1;
}
// Store values as bytes
foreach (var outputValue in outputValues)
{
accessorOutput.bytesList.AddRange(BitConverter.GetBytes(outputValue));
}
}
;
accessorOutput.count = numKeys;
if (accessorOutput.count == 0)
{
logger.RaiseWarning(String.Format("GLTFExporter.Animation | No frames to export in node animation \"{1}\" of node named \"{0}\". This will cause an error in the output gltf.", babylonNode.name, babylonAnimation.name));
}
// Animation sampler
var gltfAnimationSampler = new GLTFAnimationSampler
{
input = accessorInput.index,
output = accessorOutput.index
};
gltfAnimationSampler.index = samplerList.Count;
samplerList.Add(gltfAnimationSampler);
// Channel
var gltfChannel = new GLTFChannel
{
sampler = gltfAnimationSampler.index,
target = gltfTarget
};
channelList.Add(gltfChannel);
}
}
ExportGLTFExtension(babylonNode, ref gltfAnimation, gltf);
}
private GLTFTextureInfo ExportBaseColorTexture(GLTF gltf, BabylonTexture babylonTexture)
{
return(babylonTexture == null ? null : babylonTexture.bitmap != null?ExportBitmapTexture(gltf, babylonTexture) : ExportTexture(babylonTexture, gltf));
}
private GLTFTextureInfo ExportTexture(BabylonTexture babylonTexture, GLTF gltf)
{
return(ExportTexture(babylonTexture, gltf, null));
}
private GLTFTextureInfo ExportEmissiveTexture(BabylonStandardMaterial babylonMaterial, GLTF gltf, float[] defaultEmissive, float[] defaultDiffuse)
{
// Use one as a reference for UVs parameters
var babylonTexture = babylonMaterial.emissiveTexture != null ? babylonMaterial.emissiveTexture : babylonMaterial.diffuseTexture;
if (babylonTexture == null)
{
return(null);
}
if (babylonMaterial.emissiveTexture == null && defaultEmissive.IsAlmostEqualTo(new float[] { 0, 0, 0 }, 0))
{
return(null);
}
if (GetRegisteredEmissive(babylonMaterial, defaultDiffuse, defaultEmissive) != null)
{
return(GetRegisteredEmissive(babylonMaterial, defaultDiffuse, defaultEmissive));
}
Bitmap emissivePremultipliedBitmap = null;
if (CopyTexturesToOutput)
{
// Emissive
Bitmap emissiveBitmap = null;
if (babylonMaterial.emissiveTexture != null)
{
emissiveBitmap = LoadTexture(babylonMaterial.emissiveTexture.originalPath);
}
// Diffuse
Bitmap diffuseBitmap = null;
if (babylonMaterial.diffuseTexture != null)
{
diffuseBitmap = LoadTexture(babylonMaterial.diffuseTexture.originalPath);
}
if (emissiveBitmap != null || diffuseBitmap != null)
{
// Retreive dimensions
int width = 0;
int height = 0;
var haveSameDimensions = _getMinimalBitmapDimensions(out width, out height, emissiveBitmap, diffuseBitmap);
if (!haveSameDimensions)
{
RaiseError("Emissive and diffuse maps should have same dimensions", 2);
}
// Create pre-multiplied emissive map
emissivePremultipliedBitmap = new Bitmap(width, height);
for (int x = 0; x < width; x++)
{
for (int y = 0; y < height; y++)
{
var _emissive = emissiveBitmap != null?emissiveBitmap.GetPixel(x, y).toArrayRGB().Multiply(1f / 255.0f) : defaultEmissive;
var _diffuse = diffuseBitmap != null?diffuseBitmap.GetPixel(x, y).toArrayRGB().Multiply(1f / 255.0f) : defaultDiffuse;
var emissivePremultiplied = _emissive.Multiply(_diffuse);
Color colorEmissivePremultiplied = Color.FromArgb(
(int)(emissivePremultiplied[0] * 255),
(int)(emissivePremultiplied[1] * 255),
(int)(emissivePremultiplied[2] * 255)
);
emissivePremultipliedBitmap.SetPixel(x, y, colorEmissivePremultiplied);
}
}
}
}
var name = babylonMaterial.name + "_emissive.jpg";
var emissiveTextureInfo = ExportBitmapTexture(gltf, babylonTexture, emissivePremultipliedBitmap, name);
RegisterEmissive(emissiveTextureInfo, babylonMaterial, defaultDiffuse, defaultEmissive);
return(emissiveTextureInfo);
}
private GLTFTextureInfo ExportTexture(BabylonTexture babylonTexture, GLTF gltf, string name, Func <string> writeImageFunc)
{
if (babylonTexture == null)
{
return(null);
}
if (name == null)
{
name = babylonTexture.name;
}
if (CheckIfImageIsRegistered(name))
{
var TextureComponent = GetRegisteredTexture(name);
return(TextureComponent);
}
RaiseMessage("GLTFExporter.Texture | Export texture named: " + name, 2);
string validImageFormat = writeImageFunc.Invoke();
if (validImageFormat == null)
{
return(null);
}
name = Path.ChangeExtension(name, validImageFormat);
// --------------------------
// -------- Sampler ---------
// --------------------------
RaiseMessage("GLTFExporter.Texture | create sampler", 3);
GLTFSampler gltfSampler = new GLTFSampler();
gltfSampler.index = gltf.SamplersList.Count;
gltf.SamplersList.Add(gltfSampler);
// --- Retreive info from babylon texture ---
// Mag and min filters
GLTFSampler.TextureMagFilter?magFilter;
GLTFSampler.TextureMinFilter?minFilter;
getSamplingParameters(babylonTexture.samplingMode, out magFilter, out minFilter);
gltfSampler.magFilter = magFilter;
gltfSampler.minFilter = minFilter;
// WrapS and wrapT
gltfSampler.wrapS = getWrapMode(babylonTexture.wrapU);
gltfSampler.wrapT = getWrapMode(babylonTexture.wrapV);
// --------------------------
// --------- Image ----------
// --------------------------
RaiseMessage("GLTFExporter.Texture | create image", 3);
GLTFImage gltfImage = new GLTFImage
{
uri = name
};
gltfImage.index = gltf.ImagesList.Count;
gltf.ImagesList.Add(gltfImage);
switch (validImageFormat)
{
case "jpg":
gltfImage.FileExtension = "jpeg";
break;
case "png":
gltfImage.FileExtension = "png";
break;
}
// --------------------------
// -------- Texture ---------
// --------------------------
RaiseMessage("GLTFExporter.Texture | create texture", 3);
var gltfTexture = new GLTFTexture
{
name = name,
sampler = gltfSampler.index,
source = gltfImage.index
};
gltfTexture.index = gltf.TexturesList.Count;
gltf.TexturesList.Add(gltfTexture);
// --------------------------
// ------ TextureInfo -------
// --------------------------
var gltfTextureInfo = new GLTFTextureInfo
{
index = gltfTexture.index,
texCoord = babylonTexture.coordinatesIndex
};
RegisterTexture(gltfTextureInfo, name);
return(gltfTextureInfo);
}
public void ExportGltf(BabylonScene babylonScene, string outputFile, bool generateBinary)
{
RaiseMessage("GLTFExporter | Export outputFile=" + outputFile + " generateBinary=" + generateBinary);
RaiseMessage("GLTFExporter | Exportation started", Color.Blue);
ReportProgressChanged(0);
var gltf = new GLTF(Path.GetDirectoryName(outputFile));
// Asset
gltf.asset = new GLTFAsset
{
version = "2.0",
generator = "Babylon2Gltf2017",
copyright = "2017 (c) BabylonJS"
// no minVersion
};
// Scene
gltf.scene = 0;
// Scenes
GLTFScene scene = new GLTFScene();
GLTFScene[] scenes = { scene };
gltf.scenes = scenes;
// Materials
RaiseMessage("GLTFExporter | Exporting materials");
ReportProgressChanged(10);
var babylonMaterials = babylonScene.MaterialsList;
babylonMaterials.ForEach((babylonMaterial) =>
{
ExportMaterial(babylonMaterial, gltf);
CheckCancelled();
});
// TODO - Handle multimaterials
RaiseMessage(string.Format("GLTFExporter | Total: {0}", gltf.MaterialsList.Count /*+ glTF.MultiMaterialsList.Count*/), Color.Gray, 1);
// Nodes
List <BabylonNode> babylonNodes = new List <BabylonNode>();
babylonNodes.AddRange(babylonScene.meshes);
babylonNodes.AddRange(babylonScene.lights);
babylonNodes.AddRange(babylonScene.cameras);
// Root nodes
RaiseMessage("GLTFExporter | Exporting root nodes");
List <BabylonNode> babylonRootNodes = babylonNodes.FindAll(node => node.parentId == null);
var progressionStep = 80.0f / babylonRootNodes.Count;
var progression = 20.0f;
ReportProgressChanged((int)progression);
babylonRootNodes.ForEach(babylonNode =>
{
exportNodeRec(babylonNode, gltf, babylonScene);
progression += progressionStep;
ReportProgressChanged((int)progression);
CheckCancelled();
});
// Output
RaiseMessage("GLTFExporter | Saving to output file");
// Cast lists to arrays
gltf.Prepare();
var jsonSerializer = JsonSerializer.Create(new JsonSerializerSettings()); // Standard serializer, not the optimized one
var sb = new StringBuilder();
var sw = new StringWriter(sb, CultureInfo.InvariantCulture);
using (var jsonWriter = new JsonTextWriter(sw))
{
jsonWriter.Formatting = Formatting.None;
jsonSerializer.Serialize(jsonWriter, gltf);
}
string outputGltfFile = Path.ChangeExtension(outputFile, "gltf");
File.WriteAllText(outputGltfFile, sb.ToString());
// Binary
if (generateBinary)
{
// TODO - Export glTF data to binary format .glb
RaiseError("GLTFExporter | TODO - Generating binary files");
}
ReportProgressChanged(100);
}
public void ExportGltf(BabylonScene babylonScene, string outputDirectory, string outputFileName, bool generateBinary)
{
RaiseMessage("GLTFExporter | Exportation started", Color.Blue);
// Force output file extension to be gltf
outputFileName = Path.ChangeExtension(outputFileName, "gltf");
// Update path of output .gltf file to include subdirectory
var outputFile = Path.Combine(outputDirectory, outputFileName);
float progressionStep;
var progression = 0.0f;
ReportProgressChanged((int)progression);
// Initialization
initBabylonNodes(babylonScene);
babylonMaterialsToExport = new List <BabylonMaterial>();
var gltf = new GLTF(outputFile);
// Asset
gltf.asset = new GLTFAsset
{
version = "2.0",
copyright = "2017 (c) BabylonJS"
// no minVersion
};
string maxVersion = null;
#if MAX2015
maxVersion = "2015";
#elif MAX2017
maxVersion = "2017";
#elif MAX2018
maxVersion = "2018";
#endif
gltf.asset.generator = $"babylon.js glTF exporter for 3ds max {maxVersion} v{exporterVersion}";
// Extensions
gltf.extensionsUsed = new List <string>();
gltf.extensionsRequired = new List <string>();
// Scene
gltf.scene = 0;
// Scenes
GLTFScene scene = new GLTFScene();
GLTFScene[] scenes = { scene };
gltf.scenes = scenes;
// Meshes
RaiseMessage("GLTFExporter | Exporting meshes");
progression = 10.0f;
ReportProgressChanged((int)progression);
progressionStep = 40.0f / babylonScene.meshes.Length;
foreach (var babylonMesh in babylonScene.meshes)
{
ExportMesh(babylonMesh, gltf, babylonScene);
progression += progressionStep;
ReportProgressChanged((int)progression);
CheckCancelled();
}
// Root nodes
RaiseMessage("GLTFExporter | Exporting nodes");
List <BabylonNode> babylonRootNodes = babylonNodes.FindAll(node => node.parentId == null);
progressionStep = 40.0f / babylonRootNodes.Count;
alreadyExportedSkeletons = new Dictionary <BabylonSkeleton, BabylonSkeletonExportData>();
NbNodesByName = new Dictionary <string, int>();
babylonRootNodes.ForEach(babylonNode =>
{
exportNodeRec(babylonNode, gltf, babylonScene);
progression += progressionStep;
ReportProgressChanged((int)progression);
CheckCancelled();
});
// Materials
RaiseMessage("GLTFExporter | Exporting materials");
foreach (var babylonMaterial in babylonMaterialsToExport)
{
ExportMaterial(babylonMaterial, gltf);
CheckCancelled();
}
;
RaiseMessage(string.Format("GLTFExporter | Nb materials exported: {0}", gltf.MaterialsList.Count), Color.Gray, 1);
// Prepare buffers
gltf.BuffersList.ForEach(buffer =>
{
buffer.BufferViews.ForEach(bufferView =>
{
bufferView.Accessors.ForEach(accessor =>
{
// Chunk must be padded with trailing zeros (0x00) to satisfy alignment requirements
accessor.bytesList = new List <byte>(padChunk(accessor.bytesList.ToArray(), 4, 0x00));
// Update byte properties
accessor.byteOffset = bufferView.byteLength;
bufferView.byteLength += accessor.bytesList.Count;
// Merge bytes
bufferView.bytesList.AddRange(accessor.bytesList);
});
// Update byte properties
bufferView.byteOffset = buffer.byteLength;
buffer.byteLength += bufferView.bytesList.Count;
// Merge bytes
buffer.bytesList.AddRange(bufferView.bytesList);
});
});
// Cast lists to arrays
gltf.Prepare();
// Output
RaiseMessage("GLTFExporter | Saving to output file");
if (!generateBinary)
{
// Write .gltf file
string outputGltfFile = Path.ChangeExtension(outputFile, "gltf");
File.WriteAllText(outputGltfFile, gltfToJson(gltf));
// Write .bin file
string outputBinaryFile = Path.ChangeExtension(outputFile, "bin");
using (BinaryWriter writer = new BinaryWriter(File.Open(outputBinaryFile, FileMode.Create)))
{
gltf.BuffersList.ForEach(buffer =>
{
buffer.bytesList.ForEach(b => writer.Write(b));
});
}
}
else
{
// Export glTF data to binary format .glb
// Header
UInt32 magic = 0x46546C67; // ASCII code for glTF
UInt32 version = 2;
UInt32 length = 12; // Header length
// --- JSON chunk ---
UInt32 chunkTypeJson = 0x4E4F534A; // ASCII code for JSON
// Remove buffers uri
foreach (GLTFBuffer gltfBuffer in gltf.BuffersList)
{
gltfBuffer.uri = null;
}
// Switch images to binary
var imageBufferViews = SwitchImagesFromUriToBinary(gltf);
imageBufferViews.ForEach(imageBufferView =>
{
imageBufferView.Buffer.bytesList.AddRange(imageBufferView.bytesList);
});
gltf.Prepare();
// Serialize gltf data to JSON string then convert it to bytes
byte[] chunkDataJson = Encoding.ASCII.GetBytes(gltfToJson(gltf));
// JSON chunk must be padded with trailing Space chars (0x20) to satisfy alignment requirements
chunkDataJson = padChunk(chunkDataJson, 4, 0x20);
UInt32 chunkLengthJson = (UInt32)chunkDataJson.Length;
length += chunkLengthJson + 8; // 8 = JSON chunk header length
// bin chunk
UInt32 chunkTypeBin = 0x004E4942; // ASCII code for BIN
UInt32 chunkLengthBin = 0;
if (gltf.BuffersList.Count > 0)
{
foreach (GLTFBuffer gltfBuffer in gltf.BuffersList)
{
chunkLengthBin += (uint)gltfBuffer.byteLength;
}
length += chunkLengthBin + 8; // 8 = bin chunk header length
}
// Write binary file
string outputGlbFile = Path.ChangeExtension(outputFile, "glb");
using (BinaryWriter writer = new BinaryWriter(File.Open(outputGlbFile, FileMode.Create)))
{
// Header
writer.Write(magic);
writer.Write(version);
writer.Write(length);
// JSON chunk
writer.Write(chunkLengthJson);
writer.Write(chunkTypeJson);
writer.Write(chunkDataJson);
// bin chunk
if (gltf.BuffersList.Count > 0)
{
writer.Write(chunkLengthBin);
writer.Write(chunkTypeBin);
gltf.BuffersList[0].bytesList.ForEach(b => writer.Write(b));
}
};
}
ReportProgressChanged(100);
}
private void ExportMaterial(BabylonMaterial babylonMaterial, GLTF gltf)
{
var name = babylonMaterial.name;
var id = babylonMaterial.id;
RaiseMessage("GLTFExporter.Material | Export material named: " + name, 1);
if (babylonMaterial.GetType() == typeof(BabylonStandardMaterial))
{
var babylonStandardMaterial = babylonMaterial as BabylonStandardMaterial;
// --- prints ---
#region prints
RaiseVerbose("GLTFExporter.Material | babylonMaterial data", 2);
RaiseVerbose("GLTFExporter.Material | babylonMaterial.alpha=" + babylonMaterial.alpha, 3);
RaiseVerbose("GLTFExporter.Material | babylonMaterial.alphaMode=" + babylonMaterial.alphaMode, 3);
RaiseVerbose("GLTFExporter.Material | babylonMaterial.backFaceCulling=" + babylonMaterial.backFaceCulling, 3);
RaiseVerbose("GLTFExporter.Material | babylonMaterial.wireframe=" + babylonMaterial.wireframe, 3);
// Ambient
for (int i = 0; i < babylonStandardMaterial.ambient.Length; i++)
{
RaiseVerbose("GLTFExporter.Material | babylonStandardMaterial.ambient[" + i + "]=" + babylonStandardMaterial.ambient[i], 3);
}
// Diffuse
RaiseVerbose("GLTFExporter.Material | babylonStandardMaterial.diffuse.Length=" + babylonStandardMaterial.diffuse.Length, 3);
for (int i = 0; i < babylonStandardMaterial.diffuse.Length; i++)
{
RaiseVerbose("GLTFExporter.Material | babylonStandardMaterial.diffuse[" + i + "]=" + babylonStandardMaterial.diffuse[i], 3);
}
if (babylonStandardMaterial.diffuseTexture == null)
{
RaiseVerbose("GLTFExporter.Material | babylonStandardMaterial.diffuseTexture=null", 3);
}
else
{
RaiseVerbose("GLTFExporter.Material | babylonStandardMaterial.diffuseTexture.name=" + babylonStandardMaterial.diffuseTexture.name, 3);
}
// Normal / bump
if (babylonStandardMaterial.bumpTexture == null)
{
RaiseVerbose("GLTFExporter.Material | babylonStandardMaterial.bumpTexture=null", 3);
}
else
{
RaiseVerbose("GLTFExporter.Material | babylonStandardMaterial.bumpTexture.name=" + babylonStandardMaterial.bumpTexture.name, 3);
}
// Opacity
if (babylonStandardMaterial.opacityTexture == null)
{
RaiseVerbose("GLTFExporter.Material | babylonStandardMaterial.opacityTexture=null", 3);
}
else
{
RaiseVerbose("GLTFExporter.Material | babylonStandardMaterial.opacityTexture.name=" + babylonStandardMaterial.opacityTexture.name, 3);
}
// Specular
for (int i = 0; i < babylonStandardMaterial.specular.Length; i++)
{
RaiseVerbose("GLTFExporter.Material | babylonStandardMaterial.specular[" + i + "]=" + babylonStandardMaterial.specular[i], 3);
}
RaiseVerbose("GLTFExporter.Material | babylonStandardMaterial.specularPower=" + babylonStandardMaterial.specularPower, 3);
if (babylonStandardMaterial.specularTexture == null)
{
RaiseVerbose("GLTFExporter.Material | babylonStandardMaterial.specularTexture=null", 3);
}
else
{
RaiseVerbose("GLTFExporter.Material | babylonStandardMaterial.specularTexture.name=" + babylonStandardMaterial.specularTexture.name, 3);
}
// Occlusion
if (babylonStandardMaterial.ambientTexture == null)
{
RaiseVerbose("GLTFExporter.Material | babylonStandardMaterial.ambientTexture=null", 3);
}
else
{
RaiseVerbose("GLTFExporter.Material | babylonStandardMaterial.ambientTexture.name=" + babylonStandardMaterial.ambientTexture.name, 3);
}
// Emissive
for (int i = 0; i < babylonStandardMaterial.emissive.Length; i++)
{
RaiseVerbose("GLTFExporter.Material | babylonStandardMaterial.emissive[" + i + "]=" + babylonStandardMaterial.emissive[i], 3);
}
if (babylonStandardMaterial.emissiveTexture == null)
{
RaiseVerbose("GLTFExporter.Material | babylonStandardMaterial.emissiveTexture=null", 3);
}
else
{
RaiseVerbose("GLTFExporter.Material | babylonStandardMaterial.emissiveTexture.name=" + babylonStandardMaterial.emissiveTexture.name, 3);
}
#endregion
// --------------------------------
// --------- gltfMaterial ---------
// --------------------------------
RaiseMessage("GLTFExporter.Material | create gltfMaterial", 2);
var gltfMaterial = new GLTFMaterial
{
name = name
};
gltfMaterial.id = babylonMaterial.id;
gltfMaterial.index = gltf.MaterialsList.Count;
gltf.MaterialsList.Add(gltfMaterial);
// Alpha
string alphaMode;
float? alphaCutoff;
getAlphaMode(babylonStandardMaterial, out alphaMode, out alphaCutoff);
gltfMaterial.alphaMode = alphaMode;
gltfMaterial.alphaCutoff = alphaCutoff;
// DoubleSided
gltfMaterial.doubleSided = !babylonMaterial.backFaceCulling;
// Normal
gltfMaterial.normalTexture = ExportTexture(babylonStandardMaterial.bumpTexture, gltf);
// Occulison
gltfMaterial.occlusionTexture = ExportTexture(babylonStandardMaterial.ambientTexture, gltf);
// Emissive
gltfMaterial.emissiveFactor = babylonStandardMaterial.emissive.Multiply(babylonStandardMaterial.diffuse);
gltfMaterial.emissiveTexture = ExportEmissiveTexture(babylonStandardMaterial, gltf, babylonStandardMaterial.emissive, babylonStandardMaterial.diffuse);
// Constraints
if (gltfMaterial.emissiveTexture != null)
{
gltfMaterial.emissiveFactor = new[] { 1.0f, 1.0f, 1.0f };
}
// --------------------------------
// --- gltfPbrMetallicRoughness ---
// --------------------------------
RaiseMessage("GLTFExporter.Material | create gltfPbrMetallicRoughness", 2);
var gltfPbrMetallicRoughness = new GLTFPBRMetallicRoughness();
gltfMaterial.pbrMetallicRoughness = gltfPbrMetallicRoughness;
// --- Global ---
SpecularGlossiness _specularGlossiness = new SpecularGlossiness
{
diffuse = new BabylonColor3(babylonStandardMaterial.diffuse),
opacity = babylonMaterial.alpha,
specular = new BabylonColor3(babylonStandardMaterial.specular),
glossiness = babylonStandardMaterial.specularPower / 256
};
MetallicRoughness _metallicRoughness = ConvertToMetallicRoughness(_specularGlossiness, true);
// Base color
gltfPbrMetallicRoughness.baseColorFactor = new float[4]
{
_metallicRoughness.baseColor.r,
_metallicRoughness.baseColor.g,
_metallicRoughness.baseColor.b,
_metallicRoughness.opacity
};
// Metallic roughness
gltfPbrMetallicRoughness.metallicFactor = _metallicRoughness.metallic;
gltfPbrMetallicRoughness.roughnessFactor = _metallicRoughness.roughness;
// --- Textures ---
var babylonTexture = babylonStandardMaterial.diffuseTexture != null ? babylonStandardMaterial.diffuseTexture :
babylonStandardMaterial.specularTexture != null ? babylonStandardMaterial.specularTexture :
babylonStandardMaterial.opacityTexture != null ? babylonStandardMaterial.opacityTexture :
null;
if (babylonTexture != null)
{
bool isAlphaInTexture = (isTextureOk(babylonStandardMaterial.diffuseTexture) && babylonStandardMaterial.diffuseTexture.hasAlpha) ||
isTextureOk(babylonStandardMaterial.opacityTexture);
Bitmap baseColorBitmap = null;
Bitmap metallicRoughnessBitmap = null;
if (CopyTexturesToOutput)
{
// Diffuse
Bitmap diffuseBitmap = null;
if (babylonStandardMaterial.diffuseTexture != null)
{
diffuseBitmap = LoadTexture(babylonStandardMaterial.diffuseTexture.originalPath);
}
// Specular
Bitmap specularBitmap = null;
if (babylonStandardMaterial.specularTexture != null)
{
specularBitmap = LoadTexture(babylonStandardMaterial.specularTexture.originalPath);
}
// Opacity / Alpha / Transparency
Bitmap opacityBitmap = null;
if ((babylonStandardMaterial.diffuseTexture == null || babylonStandardMaterial.diffuseTexture.hasAlpha == false) && babylonStandardMaterial.opacityTexture != null)
{
opacityBitmap = LoadTexture(babylonStandardMaterial.opacityTexture.originalPath);
}
if (diffuseBitmap != null || specularBitmap != null || opacityBitmap != null)
{
// Retreive dimensions
int width = 0;
int height = 0;
var haveSameDimensions = _getMinimalBitmapDimensions(out width, out height, diffuseBitmap, specularBitmap, opacityBitmap);
if (!haveSameDimensions)
{
RaiseError("Diffuse, specular and opacity maps should have same dimensions", 2);
}
// Create baseColor+alpha and metallic+roughness maps
baseColorBitmap = new Bitmap(width, height);
metallicRoughnessBitmap = new Bitmap(width, height);
for (int x = 0; x < width; x++)
{
for (int y = 0; y < height; y++)
{
SpecularGlossiness specularGlossinessTexture = new SpecularGlossiness
{
diffuse = diffuseBitmap != null ? new BabylonColor3(diffuseBitmap.GetPixel(x, y)) :
_specularGlossiness.diffuse,
opacity = diffuseBitmap != null && babylonStandardMaterial.diffuseTexture.hasAlpha ? diffuseBitmap.GetPixel(x, y).A / 255.0f :
opacityBitmap != null && babylonStandardMaterial.opacityTexture.getAlphaFromRGB ? opacityBitmap.GetPixel(x, y).R / 255.0f :
opacityBitmap != null && babylonStandardMaterial.opacityTexture.getAlphaFromRGB == false?opacityBitmap.GetPixel(x, y).A / 255.0f :
_specularGlossiness.opacity,
specular = specularBitmap != null ? new BabylonColor3(specularBitmap.GetPixel(x, y)) :
_specularGlossiness.specular,
glossiness = babylonStandardMaterial.useGlossinessFromSpecularMapAlpha && specularBitmap != null?specularBitmap.GetPixel(x, y).A / 255.0f :
_specularGlossiness.glossiness
};
var displayPrints = x == width / 2 && y == height / 2;
MetallicRoughness metallicRoughnessTexture = ConvertToMetallicRoughness(specularGlossinessTexture, displayPrints);
Color colorBase = Color.FromArgb(
(int)(metallicRoughnessTexture.opacity * 255),
(int)(metallicRoughnessTexture.baseColor.r * 255),
(int)(metallicRoughnessTexture.baseColor.g * 255),
(int)(metallicRoughnessTexture.baseColor.b * 255)
);
baseColorBitmap.SetPixel(x, y, colorBase);
// The metalness values are sampled from the B channel.
// The roughness values are sampled from the G channel.
// These values are linear. If other channels are present (R or A), they are ignored for metallic-roughness calculations.
Color colorMetallicRoughness = Color.FromArgb(
0,
(int)(metallicRoughnessTexture.roughness * 255),
(int)(metallicRoughnessTexture.metallic * 255)
);
metallicRoughnessBitmap.SetPixel(x, y, colorMetallicRoughness);
}
}
}
}
// Export maps and textures
var baseColorFileName = babylonMaterial.name + "_baseColor" + (isAlphaInTexture ? ".png" : ".jpg");
gltfPbrMetallicRoughness.baseColorTexture = ExportBitmapTexture(gltf, babylonTexture, baseColorBitmap, baseColorFileName);
if (isTextureOk(babylonStandardMaterial.specularTexture))
{
gltfPbrMetallicRoughness.metallicRoughnessTexture = ExportBitmapTexture(gltf, babylonTexture, metallicRoughnessBitmap, babylonMaterial.name + "_metallicRoughness" + ".jpg");
}
// Constraints
if (gltfPbrMetallicRoughness.baseColorTexture != null)
{
gltfPbrMetallicRoughness.baseColorFactor = new[] { 1.0f, 1.0f, 1.0f, 1.0f };
}
if (gltfPbrMetallicRoughness.metallicRoughnessTexture != null)
{
gltfPbrMetallicRoughness.metallicFactor = 1.0f;
gltfPbrMetallicRoughness.roughnessFactor = 1.0f;
}
}
}
else if (babylonMaterial.GetType() == typeof(BabylonPBRMetallicRoughnessMaterial))
{
var babylonPBRMetallicRoughnessMaterial = babylonMaterial as BabylonPBRMetallicRoughnessMaterial;
// --- prints ---
#region prints
RaiseVerbose("GLTFExporter.Material | babylonMaterial data", 2);
RaiseVerbose("GLTFExporter.Material | babylonMaterial.alpha=" + babylonMaterial.alpha, 3);
RaiseVerbose("GLTFExporter.Material | babylonMaterial.alphaMode=" + babylonMaterial.alphaMode, 3);
RaiseVerbose("GLTFExporter.Material | babylonMaterial.backFaceCulling=" + babylonMaterial.backFaceCulling, 3);
RaiseVerbose("GLTFExporter.Material | babylonMaterial.wireframe=" + babylonMaterial.wireframe, 3);
// Global
RaiseVerbose("GLTFExporter.Material | babylonPBRMetallicRoughnessMaterial.maxSimultaneousLights=" + babylonPBRMetallicRoughnessMaterial.maxSimultaneousLights, 3);
RaiseVerbose("GLTFExporter.Material | babylonPBRMetallicRoughnessMaterial.disableLighting=" + babylonPBRMetallicRoughnessMaterial.disableLighting, 3);
RaiseVerbose("GLTFExporter.Material | babylonPBRMetallicRoughnessMaterial.alphaCutOff=" + babylonPBRMetallicRoughnessMaterial.alphaCutOff, 3);
RaiseVerbose("GLTFExporter.Material | babylonPBRMetallicRoughnessMaterial.transparencyMode=" + babylonPBRMetallicRoughnessMaterial.transparencyMode, 3);
RaiseVerbose("GLTFExporter.Material | babylonPBRMetallicRoughnessMaterial.doubleSided=" + babylonPBRMetallicRoughnessMaterial.doubleSided, 3);
// Base color
RaiseVerbose("GLTFExporter.Material | babylonPBRMetallicRoughnessMaterial.baseColor.Length=" + babylonPBRMetallicRoughnessMaterial.baseColor.Length, 3);
for (int i = 0; i < babylonPBRMetallicRoughnessMaterial.baseColor.Length; i++)
{
RaiseVerbose("GLTFExporter.Material | babylonPBRMetallicRoughnessMaterial.baseColor[" + i + "]=" + babylonPBRMetallicRoughnessMaterial.baseColor[i], 3);
}
if (babylonPBRMetallicRoughnessMaterial.baseTexture == null)
{
RaiseVerbose("GLTFExporter.Material | babylonPBRMetallicRoughnessMaterial.baseTexture=null", 3);
}
// Metallic+roughness
RaiseVerbose("GLTFExporter.Material | babylonPBRMetallicRoughnessMaterial.metallic=" + babylonPBRMetallicRoughnessMaterial.metallic, 3);
RaiseVerbose("GLTFExporter.Material | babylonPBRMetallicRoughnessMaterial.roughness=" + babylonPBRMetallicRoughnessMaterial.roughness, 3);
if (babylonPBRMetallicRoughnessMaterial.metallicRoughnessTexture == null)
{
RaiseVerbose("GLTFExporter.Material | babylonPBRMetallicRoughnessMaterial.metallicRoughnessTexture=null", 3);
}
// Normal / bump
if (babylonPBRMetallicRoughnessMaterial.normalTexture == null)
{
RaiseVerbose("GLTFExporter.Material | babylonPBRMetallicRoughnessMaterial.normalTexture=null", 3);
}
RaiseVerbose("GLTFExporter.Material | babylonPBRMetallicRoughnessMaterial.invertNormalMapX=" + babylonPBRMetallicRoughnessMaterial.invertNormalMapX, 3);
RaiseVerbose("GLTFExporter.Material | babylonPBRMetallicRoughnessMaterial.invertNormalMapY=" + babylonPBRMetallicRoughnessMaterial.invertNormalMapY, 3);
// Emissive
for (int i = 0; i < babylonPBRMetallicRoughnessMaterial.emissive.Length; i++)
{
RaiseVerbose("GLTFExporter.Material | babylonPBRMetallicRoughnessMaterial.emissiveColor[" + i + "]=" + babylonPBRMetallicRoughnessMaterial.emissive[i], 3);
}
if (babylonPBRMetallicRoughnessMaterial.emissiveTexture == null)
{
RaiseVerbose("GLTFExporter.Material | babylonPBRMetallicRoughnessMaterial.emissiveTexture=null", 3);
}
// Ambient occlusion
RaiseVerbose("GLTFExporter.Material | babylonPBRMetallicRoughnessMaterial.occlusionStrength=" + babylonPBRMetallicRoughnessMaterial.occlusionStrength, 3);
if (babylonPBRMetallicRoughnessMaterial.occlusionTexture == null)
{
RaiseVerbose("GLTFExporter.Material | babylonPBRMetallicRoughnessMaterial.occlusionTexture=null", 3);
}
#endregion
// --------------------------------
// --------- gltfMaterial ---------
// --------------------------------
RaiseMessage("GLTFExporter.Material | create gltfMaterial", 2);
var gltfMaterial = new GLTFMaterial
{
name = name
};
gltfMaterial.id = babylonMaterial.id;
gltfMaterial.index = gltf.MaterialsList.Count;
gltf.MaterialsList.Add(gltfMaterial);
// Alpha
string alphaMode;
float? alphaCutoff;
getAlphaMode(babylonPBRMetallicRoughnessMaterial, out alphaMode, out alphaCutoff);
gltfMaterial.alphaMode = alphaMode;
gltfMaterial.alphaCutoff = alphaCutoff;
// DoubleSided
gltfMaterial.doubleSided = babylonPBRMetallicRoughnessMaterial.doubleSided;
// Normal
gltfMaterial.normalTexture = ExportTexture(babylonPBRMetallicRoughnessMaterial.normalTexture, gltf);
// Occlusion
var occlusionText = ExportTexture(babylonPBRMetallicRoughnessMaterial.occlusionTexture, gltf);
gltfMaterial.occlusionTexture = occlusionText;
// Emissive
gltfMaterial.emissiveFactor = babylonPBRMetallicRoughnessMaterial.emissive;
gltfMaterial.emissiveTexture = ExportTexture(babylonPBRMetallicRoughnessMaterial.emissiveTexture, gltf);
// --------------------------------
// --- gltfPbrMetallicRoughness ---
// --------------------------------
RaiseMessage("GLTFExporter.Material | create gltfPbrMetallicRoughness", 2);
var gltfPbrMetallicRoughness = new GLTFPBRMetallicRoughness();
gltfMaterial.pbrMetallicRoughness = gltfPbrMetallicRoughness;
// --- Global ---
// Base color
gltfPbrMetallicRoughness.baseColorFactor = new float[4]
{
babylonPBRMetallicRoughnessMaterial.baseColor[0],
babylonPBRMetallicRoughnessMaterial.baseColor[1],
babylonPBRMetallicRoughnessMaterial.baseColor[2],
babylonPBRMetallicRoughnessMaterial.alpha
};
if (babylonPBRMetallicRoughnessMaterial.baseTexture != null)
{
if (babylonPBRMetallicRoughnessMaterial.baseTexture.bitmap != null)
{
// Base color & Alpha texture has been merged manually by the exporter
// Write bitmap file
gltfPbrMetallicRoughness.baseColorTexture = ExportBitmapTexture(gltf, babylonPBRMetallicRoughnessMaterial.baseTexture);
}
else
{
// Base color & Alpha texture was already merged
// Copy file
gltfPbrMetallicRoughness.baseColorTexture = ExportTexture(babylonPBRMetallicRoughnessMaterial.baseTexture, gltf);
}
}
// Metallic roughness
gltfPbrMetallicRoughness.metallicFactor = babylonPBRMetallicRoughnessMaterial.metallic;
gltfPbrMetallicRoughness.roughnessFactor = babylonPBRMetallicRoughnessMaterial.roughness;
if (babylonPBRMetallicRoughnessMaterial.metallicRoughnessTexture != null)
{
if (babylonPBRMetallicRoughnessMaterial.metallicRoughnessTexture.bitmap != null)
{
// Metallic & roughness texture has been merged manually by the exporter
// Write bitmap file
gltfPbrMetallicRoughness.metallicRoughnessTexture = ExportBitmapTexture(gltf, babylonPBRMetallicRoughnessMaterial.metallicRoughnessTexture);
}
else
{
// Metallic & roughness & occlusion texture was already merged
// Copy file
if (babylonPBRMetallicRoughnessMaterial.occlusionTexture != null)
{
if (babylonPBRMetallicRoughnessMaterial.occlusionTexture.originalPath == babylonPBRMetallicRoughnessMaterial.metallicRoughnessTexture.originalPath)
{
gltfPbrMetallicRoughness.metallicRoughnessTexture = occlusionText;
}
else
{
// Metallic & roughness texture was already merged
// Copy file
gltfPbrMetallicRoughness.metallicRoughnessTexture = ExportTexture(babylonPBRMetallicRoughnessMaterial.metallicRoughnessTexture, gltf);
}
}
else
{
// Metallic & roughness texture was already merged
// Copy file
gltfPbrMetallicRoughness.metallicRoughnessTexture = ExportTexture(babylonPBRMetallicRoughnessMaterial.metallicRoughnessTexture, gltf);
}
}
}
}
else
{
RaiseWarning("GLTFExporter.Material | Unsupported material type: " + babylonMaterial.GetType(), 2);
}
}
public static void ExportToGLTF(this MiloObjectDir milo, string path, AppState appState)
{
var serializer = appState.GetSerializer();
var pathDirectory = Path.GetDirectoryName(path);
var textures = milo.Entries
.Where(x => "Tex".Equals(x.Type, StringComparison.CurrentCultureIgnoreCase))
.Select(y => serializer.ReadFromMiloObjectBytes <Tex>(y as MiloObjectBytes))
.ToList();
var extTexs = textures.Where(x => x.UseExternal).ToList();
var miloDir = appState.GetWorkingDirectory().FullPath;
// Update textures
foreach (var texture in textures.Where(x => x.UseExternal && x.Bitmap == null)) // TODO: Figure out what UseExternal actually means
{
var texPath = Path.Combine(miloDir, MakeGenPath(texture.ExternalPath, appState.SystemInfo.Platform));
var bitmap = serializer.ReadFromFile <HMXBitmap>(texPath);
texture.Bitmap = bitmap;
texture.UseExternal = false;
}
var views = milo.Entries
.Where(x => "View".Equals(x.Type, StringComparison.CurrentCultureIgnoreCase))
.Select(y => serializer.ReadFromMiloObjectBytes <View>(y as MiloObjectBytes))
.ToList();
views.AddRange(milo.Entries
.Where(x => "Group".Equals(x.Type, StringComparison.CurrentCultureIgnoreCase))
.Select(y => serializer.ReadFromMiloObjectBytes <Group>(y as MiloObjectBytes))
.ToList());
var meshes = milo.Entries
.Where(x => "Mesh".Equals(x.Type, StringComparison.CurrentCultureIgnoreCase))
.Select(y => serializer.ReadFromMiloObjectBytes <Mackiloha.Render.Mesh>(y as MiloObjectBytes))
.Where(z => !string.IsNullOrEmpty(z.Material)) // Don't care about bone meshes for now
.ToList();
var trans = milo.Entries
.Where(x => "Trans".Equals(x.Type, StringComparison.CurrentCultureIgnoreCase))
.Select(y => serializer.ReadFromMiloObjectBytes <Mackiloha.Render.TransStandalone>(y as MiloObjectBytes))
.ToList();
var materials = milo.Entries
.Where(x => "Mat".Equals(x.Type, StringComparison.CurrentCultureIgnoreCase))
.Select(y => serializer.ReadFromMiloObjectBytes <Mackiloha.Render.Mat>(y as MiloObjectBytes))
//.Where(z => z.TextureEntries.Count > 0 && z.TextureEntries.Any(w => !string.IsNullOrEmpty(w.Texture))) // TODO: Idk?
.ToList();
var cams = milo.Entries
.Where(x => "Cam".Equals(x.Type, StringComparison.CurrentCultureIgnoreCase) && appState.SystemInfo.Version <= 10)
.Select(y => serializer.ReadFromMiloObjectBytes <Cam>(y as MiloObjectBytes))
.ToList();
var environs = milo.Entries
.Where(x => "Environ".Equals(x.Type, StringComparison.CurrentCultureIgnoreCase) && appState.SystemInfo.Version <= 10)
.Select(y => serializer.ReadFromMiloObjectBytes <Environ>(y as MiloObjectBytes))
.ToList();
var miloEntries = textures
.Union <MiloObject>(views)
.Union(meshes)
.Union(trans)
.Union(materials)
.Union(cams)
.Union(environs)
.ToList();
var transEntries = miloEntries
.Where(x => x is ITrans)
.ToList();
var drawEntries = miloEntries
.Where(x => x is IDraw)
.ToList();
/* var transforms = milo.Entries
* .Where(x => x.Type.Equals("Trans", StringComparison.CurrentCultureIgnoreCase))
* .Select(y =>
* {
* var trans = MiloOG.Trans.FromStream(new MemoryStream((y as MiloEntry).Data));
* trans.Name = y.Name;
* return trans;
* }).ToList(); */
var scene = new GLTF()
{
Asset = new Asset()
{
Generator = $"Mackiloha v{typeof(MiloExtensions).Assembly.GetName().Version}"
},
Images = textures.Select(x => new Image()
{
Name = Path.GetFileNameWithoutExtension(x.Name) + ".png",
Uri = Path.GetFileNameWithoutExtension(x.Name) + ".png"
}).ToArray(),
Samplers = new Sampler[]
{
new Sampler()
{
MagFilter = MagFilter.Linear,
MinFilter = MinFilter.Nearest,
WrapS = WrapMode.Repeat,
WrapT = WrapMode.Repeat
}
},
Scene = 0
};
var currentOffset = 0;
scene.Textures = textures.Select(x => new Texture()
{
Name = x.Name,
Sampler = 0,
Source = currentOffset++
}).ToArray();
var keyIdxPairs = Enumerable.Range(0, textures.Count).ToDictionary(x => textures[x].Name);
scene.Materials = materials.Select(x => new Material()
{
Name = x.Name,
PbrMetallicRoughness = new PbrMetallicRoughness()
{
BaseColorTexture =
// Verify material has texture and exists in milo
(x.TextureEntries.Any(w => !string.IsNullOrEmpty(w.Texture)) &&
keyIdxPairs.ContainsKey(x.TextureEntries.First(x => !string.IsNullOrEmpty(x.Texture)).Texture))
? new BaseColorTexture()
{
// TODO: Figure out how to map multiple textures to single material
Index = keyIdxPairs[x.TextureEntries.First(y => !string.IsNullOrEmpty(y.Texture)).Texture]
}
: null,
BaseColorFactor = new Vector4 <double>(x.BaseColor.R, x.BaseColor.G, x.BaseColor.B, x.BaseColor.A),
MetallicFactor = (x.TextureEntries.Any(w => !string.IsNullOrEmpty(w.Texture)) && x.TextureEntries.First(y => !string.IsNullOrEmpty(y.Texture)).Unknown2 == 2) ? 1 : 0,
RoughnessFactor = (x.TextureEntries.Any(w => !string.IsNullOrEmpty(w.Texture)) && x.TextureEntries.First(y => !string.IsNullOrEmpty(y.Texture)).Unknown2 == 2) ? 0 : 1
},
EmissiveFactor = new Vector3 <double>(),
AlphaMode = AlphaMode.Mask, // x.Blend == BlendFactor.One ? AlphaMode.Blend : AlphaMode.Opaque,
DoubleSided = true
}).ToArray();
if (!Directory.Exists(pathDirectory))
{
// Create directory
Directory.CreateDirectory(pathDirectory);
}
// Saves textures
for (int i = 0; i < textures.Count; i++)
{
textures[i].Bitmap.SaveAs(serializer.Info,
Path.Combine(pathDirectory, scene.Images[i].Uri));
}
var accessors = new List <Accessor>();
var sceneMeshes = new List <GLTFTools.Mesh>();
int bufferSize12 = meshes.Select(x => x.Vertices.Count * 12 * 2).Sum(); // Verts + norms
int bufferSize8 = meshes.Select(x => x.Vertices.Count * 8).Sum(); // UV
int bufferSize4 = meshes.Select(x => x.Faces.Count * 6).Sum(); // Faces
if (bufferSize4 % 4 != 0)
{
bufferSize4 += 4 - (bufferSize4 % 4);
}
scene.Buffers = new GLTFTools.Buffer[]
{
new GLTFTools.Buffer()
{
Name = Path.GetFileNameWithoutExtension(path),
ByteLength = (bufferSize4 + bufferSize8 + bufferSize12),
Uri = Path.GetFileNameWithoutExtension(path) + ".bin"
}
};
scene.BufferViews = new BufferView[]
{
new BufferView()
{
Name = "vertsAndNorms",
ByteLength = bufferSize12,
ByteOffset = 0,
ByteStride = 12
},
new BufferView()
{
Name = "uvs",
ByteLength = bufferSize8,
ByteOffset = bufferSize12,
ByteStride = 8
},
new BufferView()
{
Name = "faces",
ByteLength = bufferSize4,
ByteOffset = bufferSize12 + bufferSize8,
ByteStride = null
}
};
int buffer12Offset = scene.BufferViews[0].ByteOffset.Value;
int buffer8Offset = scene.BufferViews[1].ByteOffset.Value;
int buffer4Offset = scene.BufferViews[2].ByteOffset.Value;
var bw = new BinaryWriter(new MemoryStream(new byte[bufferSize12 + bufferSize8 + bufferSize4]));
Dictionary <string, int> meshIndex = new Dictionary <string, int>();
currentOffset = 0;
keyIdxPairs = Enumerable
.Range(0, materials.Count)
.ToDictionary(x => materials[x].Name);
foreach (var mesh in meshes)
{
if (mesh.Vertices.Count <= 0 || mesh.Faces.Count <= 0)
{
continue;
}
meshIndex.Add(mesh.Name, currentOffset++);
// Finds related material + texture
var mat = materials.First(x => ((string)x.Name).Equals(mesh.Material, StringComparison.CurrentCultureIgnoreCase));
sceneMeshes.Add(new GLTFTools.Mesh()
{
Name = mesh.Name,
Primitives = new MeshPrimitive[]
{
new MeshPrimitive()
{
Attributes = new MeshPrimitiveAttributes()
{
Position = accessors.Count,
Normal = accessors.Count + 1,
TextureCoordinate0 = accessors.Count + 2
},
Indices = accessors.Count + 3,
Material = keyIdxPairs[mesh.Material],
Mode = RenderMode.Triangles
}
}
});
// Vertices
accessors.Add(new Accessor()
{
Name = mesh.Name + "_positions",
ComponentType = ComponentType.Float,
Count = mesh.Vertices.Count,
Min = new double[]
{
mesh.Vertices.Select(x => x.X).Min(),
mesh.Vertices.Select(x => x.Y).Min(),
mesh.Vertices.Select(x => x.Z).Min()
},
Max = new double[]
{
mesh.Vertices.Select(x => x.X).Max(),
mesh.Vertices.Select(x => x.Y).Max(),
mesh.Vertices.Select(x => x.Z).Max()
},
Type = GLType.Vector3,
BufferView = 0,
ByteOffset = buffer12Offset - scene.BufferViews[0].ByteOffset.Value
});
bw.BaseStream.Seek(buffer12Offset, SeekOrigin.Begin);
foreach (var vert in mesh.Vertices)
{
bw.Write(vert.X);
bw.Write(vert.Y);
bw.Write(vert.Z);
}
buffer12Offset = (int)bw.BaseStream.Position;
// Normals
accessors.Add(new Accessor()
{
Name = mesh.Name + "_normals",
ComponentType = ComponentType.Float,
Count = mesh.Vertices.Count,
Min = new double[]
{
mesh.Vertices.Select(x => x.NormalX).Min(),
mesh.Vertices.Select(x => x.NormalY).Min(),
mesh.Vertices.Select(x => x.NormalZ).Min()
},
Max = new double[]
{
mesh.Vertices.Select(x => x.NormalX).Max(),
mesh.Vertices.Select(x => x.NormalY).Max(),
mesh.Vertices.Select(x => x.NormalZ).Max()
},
Type = GLType.Vector3,
BufferView = 0,
ByteOffset = buffer12Offset - scene.BufferViews[0].ByteOffset.Value
});
bw.BaseStream.Seek(buffer12Offset, SeekOrigin.Begin);
foreach (var vert in mesh.Vertices)
{
bw.Write(vert.NormalX);
bw.Write(vert.NormalY);
bw.Write(vert.NormalZ);
}
buffer12Offset = (int)bw.BaseStream.Position;
// UV coordinates
accessors.Add(new Accessor()
{
Name = mesh.Name + "_texcoords",
ComponentType = ComponentType.Float,
Count = mesh.Vertices.Count,
Min = new double[]
{
mesh.Vertices.Select(x => x.U).Min(),
mesh.Vertices.Select(x => x.V).Min()
},
Max = new double[]
{
mesh.Vertices.Select(x => x.U).Max(),
mesh.Vertices.Select(x => x.V).Max()
},
Type = GLType.Vector2,
BufferView = 1,
ByteOffset = buffer8Offset - scene.BufferViews[1].ByteOffset.Value
});
bw.BaseStream.Seek(buffer8Offset, SeekOrigin.Begin);
foreach (var vert in mesh.Vertices)
{
bw.Write(vert.U);
bw.Write(vert.V);
}
buffer8Offset = (int)bw.BaseStream.Position;
// Faces
accessors.Add(new Accessor()
{
Name = mesh.Name + "_indicies",
ComponentType = ComponentType.UnsignedShort,
Count = mesh.Faces.Count * 3,
Min = new double[]
{
mesh.Faces.SelectMany(x => new [] { x.V1, x.V2, x.V3 }).Min()
},
Max = new double[]
{
mesh.Faces.SelectMany(x => new [] { x.V1, x.V2, x.V3 }).Max()
},
Type = GLType.Scalar,
BufferView = 2,
ByteOffset = buffer4Offset - scene.BufferViews[2].ByteOffset.Value
});
bw.BaseStream.Seek(buffer4Offset, SeekOrigin.Begin);
foreach (var face in mesh.Faces)
{
bw.Write(face.V1);
bw.Write(face.V2);
bw.Write(face.V3);
}
buffer4Offset = (int)bw.BaseStream.Position;
}
scene.Accessors = accessors.ToArray();
scene.Meshes = sceneMeshes.ToArray();
var nodes = new List <Node>();
var nodeIndex = new Dictionary <string, int>();
/* // TODO: Make milo objects with transforms data
* MiloOG.AbstractEntry GetAbstractEntry(string name)
* {
* var entry = milo.Entries.FirstOrDefault(x => x.Name == name);
* if (entry == null) return null;
*
* switch (entry.Type)
* {
* case "Mesh":
* return meshes.First(y => y.Name == entry.Name);
* case "Trans":
* return transforms.First(y => y.Name == entry.Name);
* case "View":
* return views.First(y => y.Name == entry.Name);
* default:
* return null;
* }
* } */
/* Matrix4<float>? GetTransform(string transform)
* {
* var transEntry = milo.Entries.FirstOrDefault(y => y.Name == transform);
* if (transEntry == null) return null;
*
* switch (transEntry.Type)
* {
* case "Mesh":
* var mesh = meshes.First(y => y.Name == transEntry.Name);
* return mesh.Mat2.ToGLMatrix();
* case "Trans":
* var trans = transforms.First(y => y.Name == transEntry.Name);
* return trans.Mat2.ToGLMatrix();
* case "View":
* var view2 = views.First(y => y.Name == transEntry.Name);
* return view2.Mat2.ToGLMatrix();
* default:
* return null;
* }
* } */
/* string GetTransformName(MiloOG.AbstractEntry entry)
* {
* switch (entry.Type)
* {
* case "Mesh":
* var mesh = meshes.First(y => y.Name == entry.Name);
* return mesh.Transform;
* case "Trans":
* var trans = transforms.First(y => y.Name == entry.Name);
* return trans.Name;
* case "View":
* var view = views.First(y => y.Name == entry.Name);
* return view.Transform;
* default:
* return null;
* }
* } */
var shadowRegex = new System.Text.RegularExpressions.Regex("shadow[^.]*.mesh$", System.Text.RegularExpressions.RegexOptions.IgnoreCase);
var children = drawEntries
.Where(w => w is ITrans) // Use trans collection?
.Select(x => new
{
Name = (string)x.Name,
Trans = (string)(x as ITrans).Transform
})
.Where(y => !string.IsNullOrEmpty(y.Trans))
.GroupBy(z => z.Trans)
.ToDictionary(g => g.Key, g => g.Select(w => w.Name)
.OrderBy(s => s)
.Where(x => !shadowRegex.IsMatch(x)) // Removes shadow meshes for now
.ToList());
/* foreach (var entry in meshes.Union<MiloObject>(views)) // TODO: Union w/ trans
* {
* var transName = (entry as Mackiloha.Render.Interfaces.ITrans)
* .Trans
* .Transform;
*
* if (!children.ContainsKey(transName))
* children.Add(transName, new List<string>(new string[] { entry.Name }));
* else if (!children[transName].Contains(entry.Name))
* children[transName].Add(entry.Name);
* } */
var rootIndex = new List <int>();
foreach (var key in children.Keys)
{
rootIndex.Add(nodes.Count);
var transEntry = transEntries.FirstOrDefault(x => x.Name == key) as ITrans;
var node = new Node()
{
Name = "Root_" + key,
Mesh = meshIndex.ContainsKey(key) ? (int?)meshIndex[key] : null,
Matrix = ToGLMatrix((transEntry != null) ? transEntry.Mat2 : Matrix4.Identity()),
Children = Enumerable.Range(nodes.Count + 1, children[key].Count).ToArray()
};
nodes.Add(node);
foreach (var child in children[key])
{
var subEntry = drawEntries.First(x => x.Name == child);
var subNode = new Node()
{
Name = subEntry.Name,
Mesh = meshIndex.ContainsKey(subEntry.Name) ? (int?)meshIndex[subEntry.Name] : null,
//Matrix = ToGLMatrix(subEntry.Mat1)
};
nodeIndex.Add(child, rootIndex.Last());
nodes.Add(subNode);
}
}
int CreateNode(string name) // Returns index of node
{
if (nodeIndex.ContainsKey(name))
{
return(nodeIndex[name]);
}
var entry = drawEntries.First(x => x.Name == name) as IDraw;
var transformEntry = drawEntries.First(x => x.Name == (entry as ITrans).Transform);
List <string> subNodes = entry.Drawables.Select(x => (string)x).ToList();
var node = new Node()
{
Name = name,
Mesh = meshIndex.ContainsKey(name) ? (int?)meshIndex[name] : null,
Matrix = ToGLMatrix((entry as ITrans).Mat1),
//Matrix = GetTransform(entry.Transform),
Children = (subNodes.Count > 0) ? subNodes.Select(x => CreateNode(x)).ToArray() : null
};
nodeIndex.Add(name, nodes.Count);
nodes.Add(node);
return(nodeIndex[name]);
}
// foreach (var n in meshes.Union<MiloOG.AbstractEntry>(views).Union<MiloOG.AbstractEntry>(transforms)) CreateNode(n.Name);
//
// scene.Scene = 0;
// scene.Scenes = new Scene[] { new Scene() { Nodes = Enumerable.Range(0, nodes.Count).ToArray() } };
// foreach (var view in views) CreateNode(view.Name);
//
// // Finds root node
// var childrenNodes = nodes.SelectMany(x => x.Children ?? new int[0]).Distinct();
// var parentNodes = Enumerable.Range(0, nodes.Count);
// var rootIdx = parentNodes.Except(childrenNodes).Single();
//
// scene.Scene = 0;
// scene.Scenes = new Scene[] { new Scene() { Nodes = new int[] { rootIdx } } };
List <string> GetAllSubs(MiloObject entry)
{
List <string> subsEntriesNames = (entry as IDraw).Drawables
.Select(x => (string)x)
.ToList();
var subEntries = subsEntriesNames
.Select(x => drawEntries.FirstOrDefault(y => y.Name == x))
.Where(y => y != null)
.ToList();
foreach (var subEntry in subEntries)
{
subsEntriesNames.AddRange(GetAllSubs(subEntry));
}
return(subsEntriesNames);
}
scene.Scene = 0;
//scene.Scenes = new Scene[] { new Scene() { Nodes = rootIndex.ToArray() } };
scene.Scenes = views
.Select(x => new Scene()
{
Nodes = GetAllSubs(x)
.Select(y => nodeIndex.ContainsKey(y) ? nodeIndex[y] : -1)
.Where(z => z != -1)
.Distinct()
.ToArray()
})
.OrderByDescending(x => x.Nodes.Length)
.ToArray();
if (scene.Scenes.Length <= 0)
{
// Create scene from root notes
scene.Scenes = new[]
private void _exportMorphTargets(BabylonMesh babylonMesh, BabylonSubMesh babylonSubMesh, BabylonMorphTargetManager babylonMorphTargetManager, GLTF gltf, GLTFBuffer buffer, GLTFMeshPrimitive meshPrimitive)
{
var gltfMorphTargets = new List <GLTFMorphTarget>();
foreach (var babylonMorphTarget in babylonMorphTargetManager.targets)
{
var gltfMorphTarget = new GLTFMorphTarget();
// Positions
if (babylonMorphTarget.positions != null)
{
var accessorTargetPositions = GLTFBufferService.Instance.CreateAccessor(
gltf,
GLTFBufferService.Instance.GetBufferViewFloatVec3(gltf, buffer),
"accessorTargetPositions",
GLTFAccessor.ComponentType.FLOAT,
GLTFAccessor.TypeEnum.VEC3
);
gltfMorphTarget.Add(GLTFMorphTarget.Attribute.POSITION.ToString(), accessorTargetPositions.index);
// Populate accessor
int nbComponents = 3; // Vector3
int startIndex = babylonSubMesh.verticesStart * nbComponents;
int endIndex = startIndex + babylonSubMesh.verticesCount * nbComponents;
accessorTargetPositions.min = new float[] { float.MaxValue, float.MaxValue, float.MaxValue };
accessorTargetPositions.max = new float[] { float.MinValue, float.MinValue, float.MinValue };
for (int indexPosition = startIndex; indexPosition < endIndex; indexPosition += 3)
{
var positionTarget = ArrayExtension.SubArray(babylonMorphTarget.positions, indexPosition, 3);
// Babylon stores morph target information as final data while glTF expects deltas from mesh primitive
var positionMesh = ArrayExtension.SubArray(babylonMesh.positions, indexPosition, 3);
for (int indexCoordinate = 0; indexCoordinate < positionTarget.Length; indexCoordinate++)
{
positionTarget[indexCoordinate] = positionTarget[indexCoordinate] - positionMesh[indexCoordinate];
}
positionTarget[2] *= -1;
// Store values as bytes
foreach (var coordinate in positionTarget)
{
accessorTargetPositions.bytesList.AddRange(BitConverter.GetBytes(coordinate));
}
// Update min and max values
GLTFBufferService.UpdateMinMaxAccessor(accessorTargetPositions, positionTarget);
}
accessorTargetPositions.count = babylonSubMesh.verticesCount;
}
// Normals
if (babylonMorphTarget.normals != null && exportParameters.exportMorphNormals)
{
var accessorTargetNormals = GLTFBufferService.Instance.CreateAccessor(
gltf,
GLTFBufferService.Instance.GetBufferViewFloatVec3(gltf, buffer),
"accessorTargetNormals",
GLTFAccessor.ComponentType.FLOAT,
GLTFAccessor.TypeEnum.VEC3
);
gltfMorphTarget.Add(GLTFMorphTarget.Attribute.NORMAL.ToString(), accessorTargetNormals.index);
// Populate accessor
int nbComponents = 3; // Vector3
int startIndex = babylonSubMesh.verticesStart * nbComponents;
int endIndex = startIndex + babylonSubMesh.verticesCount * nbComponents;
for (int indexNormal = startIndex; indexNormal < endIndex; indexNormal += 3)
{
var normalTarget = ArrayExtension.SubArray(babylonMorphTarget.normals, indexNormal, 3);
// Babylon stores morph target information as final data while glTF expects deltas from mesh primitive
var normalMesh = ArrayExtension.SubArray(babylonMesh.normals, indexNormal, 3);
for (int indexCoordinate = 0; indexCoordinate < normalTarget.Length; indexCoordinate++)
{
normalTarget[indexCoordinate] = normalTarget[indexCoordinate] - normalMesh[indexCoordinate];
}
normalTarget[2] *= -1;
// Store values as bytes
foreach (var coordinate in normalTarget)
{
accessorTargetNormals.bytesList.AddRange(BitConverter.GetBytes(coordinate));
}
}
accessorTargetNormals.count = babylonSubMesh.verticesCount;
}
// Tangents
if (babylonMorphTarget.tangents != null && exportParameters.exportTangents)
{
var accessorTargetTangents = GLTFBufferService.Instance.CreateAccessor(
gltf,
GLTFBufferService.Instance.GetBufferViewFloatVec3(gltf, buffer),
"accessorTargetTangents",
GLTFAccessor.ComponentType.FLOAT,
GLTFAccessor.TypeEnum.VEC3
);
gltfMorphTarget.Add(GLTFMeshPrimitive.Attribute.TANGENT.ToString(), accessorTargetTangents.index);
// Populate accessor
// Note that the w component for handedness is omitted when targeting TANGENT data since handedness cannot be displaced.
int nbComponents = 4; // Vector4
int startIndex = babylonSubMesh.verticesStart * nbComponents;
int endIndex = startIndex + babylonSubMesh.verticesCount * nbComponents;
for (int indexTangent = startIndex; indexTangent < endIndex; indexTangent += 4)
{
var tangentTarget = ArrayExtension.SubArray(babylonMorphTarget.tangents, indexTangent, 3);
// Babylon stores morph target information as final data while glTF expects deltas from mesh primitive
var tangentMesh = ArrayExtension.SubArray(babylonMesh.tangents, indexTangent, 3);
for (int indexCoordinate = 0; indexCoordinate < tangentTarget.Length; indexCoordinate++)
{
tangentTarget[indexCoordinate] = tangentTarget[indexCoordinate] - tangentMesh[indexCoordinate];
}
tangentTarget[2] *= -1;
// Store values as bytes
foreach (var coordinate in tangentTarget)
{
accessorTargetTangents.bytesList.AddRange(BitConverter.GetBytes(coordinate));
}
}
accessorTargetTangents.count = babylonSubMesh.verticesCount;
}
gltfMorphTargets.Add(gltfMorphTarget);
}
if (gltfMorphTargets.Count > 0)
{
meshPrimitive.targets = gltfMorphTargets.ToArray();
}
}
private bool ExportMorphTargetWeightAnimation(BabylonMorphTargetManager babylonMorphTargetManager, GLTF gltf, GLTFNode gltfNode, List <GLTFChannel> channelList, List <GLTFAnimationSampler> samplerList, int startFrame, int endFrame, BabylonScene babylonScene)
{
if (!_isBabylonMorphTargetManagerAnimationValid(babylonMorphTargetManager))
{
return(false);
}
logger.RaiseMessage("GLTFExporter.Animation | Export animation of morph target manager with id: " + babylonMorphTargetManager.id, 2);
// Target
var gltfTarget = new GLTFChannelTarget
{
node = gltfNode.index
};
gltfTarget.path = "weights";
// Buffer
var buffer = GLTFBufferService.Instance.GetBuffer(gltf);
// --- Input ---
var accessorInput = GLTFBufferService.Instance.CreateAccessor(
gltf,
GLTFBufferService.Instance.GetBufferViewAnimationFloatScalar(gltf, buffer),
"accessorAnimationInput",
GLTFAccessor.ComponentType.FLOAT,
GLTFAccessor.TypeEnum.SCALAR
);
// Populate accessor
accessorInput.min = new float[] { float.MaxValue };
accessorInput.max = new float[] { float.MinValue };
var influencesPerFrame = _getTargetManagerAnimationsData(babylonMorphTargetManager);
var frames = new List <int>(influencesPerFrame.Keys);
frames.Sort(); // Mandatory otherwise gltf loader of babylon doesn't understand
int numKeys = 0;
foreach (var frame in frames)
{
if (frame < startFrame)
{
continue;
}
if (frame > endFrame)
{
continue;
}
numKeys++;
var inputValue = frame / (float)babylonScene.TimelineFramesPerSecond;
// Store values as bytes
accessorInput.bytesList.AddRange(BitConverter.GetBytes(inputValue));
// Update min and max values
GLTFBufferService.UpdateMinMaxAccessor(accessorInput, inputValue);
}
accessorInput.count = numKeys;
// bail out if we have no keys to export (?)
// todo [KeyInterpolation]: bail out only when there are no keyframes at all (?) and otherwise add the appropriate (interpolated) keyframes
if (numKeys == 0)
{
return(false);
}
// --- Output ---
GLTFAccessor accessorOutput = GLTFBufferService.Instance.CreateAccessor(
gltf,
GLTFBufferService.Instance.GetBufferViewAnimationFloatScalar(gltf, buffer),
"accessorAnimationWeights",
GLTFAccessor.ComponentType.FLOAT,
GLTFAccessor.TypeEnum.SCALAR
);
// Populate accessor
foreach (var frame in frames)
{
if (frame < startFrame)
{
continue;
}
if (frame > endFrame)
{
continue;
}
var outputValues = influencesPerFrame[frame];
// Store values as bytes
foreach (var outputValue in outputValues)
{
accessorOutput.count++;
accessorOutput.bytesList.AddRange(BitConverter.GetBytes(outputValue));
}
}
// Animation sampler
var gltfAnimationSampler = new GLTFAnimationSampler
{
input = accessorInput.index,
output = accessorOutput.index
};
gltfAnimationSampler.index = samplerList.Count;
samplerList.Add(gltfAnimationSampler);
// Channel
var gltfChannel = new GLTFChannel
{
sampler = gltfAnimationSampler.index,
target = gltfTarget
};
channelList.Add(gltfChannel);
return(true);
}
private GLTFCamera ExportCamera(BabylonCamera babylonCamera, GLTF gltf, GLTFNode gltfParentNode)
{
RaiseMessage("GLTFExporter.Camera | Export camera named: " + babylonCamera.name, 1);
// --------------------------
// ---------- Node ----------
// --------------------------
RaiseMessage("GLTFExporter.Camera | Node", 2);
// Node
var gltfNode = new GLTFNode();
gltfNode.name = babylonCamera.name;
gltfNode.index = gltf.NodesList.Count;
gltf.NodesList.Add(gltfNode);
// Hierarchy
if (gltfParentNode != null)
{
RaiseMessage("GLTFExporter.Camera | Add " + babylonCamera.name + " as child to " + gltfParentNode.name, 3);
gltfParentNode.ChildrenList.Add(gltfNode.index);
gltfNode.parent = gltfParentNode;
}
else
{
// It's a root node
// Only root nodes are listed in a gltf scene
RaiseMessage("GLTFExporter.Camera | Add " + babylonCamera.name + " as root node to scene", 3);
gltf.scenes[0].NodesList.Add(gltfNode.index);
}
// Transform
gltfNode.translation = babylonCamera.position;
if (babylonCamera.rotationQuaternion != null)
{
gltfNode.rotation = babylonCamera.rotationQuaternion;
}
else
{
// Convert rotation vector to quaternion
BabylonVector3 rotationVector3 = new BabylonVector3
{
X = babylonCamera.rotation[0],
Y = babylonCamera.rotation[1],
Z = babylonCamera.rotation[2]
};
gltfNode.rotation = rotationVector3.toQuaternion().ToArray();
}
// No scaling defined for babylon camera. Use identity instead.
gltfNode.scale = new float[3] {
1, 1, 1
};
// Switch coordinate system at object level
gltfNode.translation[2] *= -1;
gltfNode.rotation[0] *= -1;
gltfNode.rotation[1] *= -1;
// Animations
ExportNodeAnimation(babylonCamera, gltf, gltfNode);
// --- prints ---
#region prints
RaiseVerbose("GLTFExporter.Camera | babylonCamera data", 2);
RaiseVerbose("GLTFExporter.Camera | babylonCamera.type=" + babylonCamera.type, 3);
RaiseVerbose("GLTFExporter.Camera | babylonCamera.fov=" + babylonCamera.fov, 3);
RaiseVerbose("GLTFExporter.Camera | babylonCamera.maxZ=" + babylonCamera.maxZ, 3);
RaiseVerbose("GLTFExporter.Camera | babylonCamera.minZ=" + babylonCamera.minZ, 3);
#endregion
// --------------------------
// ------- gltfCamera -------
// --------------------------
RaiseMessage("GLTFExporter.Camera | create gltfCamera", 2);
// Camera
var gltfCamera = new GLTFCamera {
name = babylonCamera.name
};
gltfCamera.index = gltf.CamerasList.Count;
gltf.CamerasList.Add(gltfCamera);
gltfNode.camera = gltfCamera.index;
gltfCamera.gltfNode = gltfNode;
// Camera type
switch (babylonCamera.mode)
{
case (BabylonCamera.CameraMode.ORTHOGRAPHIC_CAMERA):
var gltfCameraOrthographic = new GLTFCameraOrthographic();
gltfCameraOrthographic.xmag = 1; // Do not bother about it - still mandatory
gltfCameraOrthographic.ymag = 1; // Do not bother about it - still mandatory
gltfCameraOrthographic.zfar = babylonCamera.maxZ;
gltfCameraOrthographic.znear = babylonCamera.minZ;
gltfCamera.type = GLTFCamera.CameraType.orthographic.ToString();
gltfCamera.orthographic = gltfCameraOrthographic;
break;
case (BabylonCamera.CameraMode.PERSPECTIVE_CAMERA):
var gltfCameraPerspective = new GLTFCameraPerspective();
gltfCameraPerspective.aspectRatio = null; // Do not bother about it - use default glTF value
gltfCameraPerspective.yfov = babylonCamera.fov; // Babylon camera fov mode is assumed to be vertical (FOVMODE_VERTICAL_FIXED)
gltfCameraPerspective.zfar = babylonCamera.maxZ;
gltfCameraPerspective.znear = babylonCamera.minZ;
gltfCamera.type = GLTFCamera.CameraType.perspective.ToString();
gltfCamera.perspective = gltfCameraPerspective;
break;
default:
RaiseError("GLTFExporter.Camera | camera mode not found");
break;
}
return(gltfCamera);
}
private void ExportNodeAnimation(GLTFAnimation gltfAnimation, int startFrame, int endFrame, GLTF gltf, BabylonNode babylonNode, GLTFNode gltfNode, BabylonScene babylonScene)
{
var channelList = gltfAnimation.ChannelList;
var samplerList = gltfAnimation.SamplerList;
bool exportNonAnimated = exportParameters.animgroupExportNonAnimated;
// Combine babylon animations from .babylon file and cached ones
var babylonAnimations = new List <BabylonAnimation>();
if (babylonNode.animations != null)
{
babylonAnimations.AddRange(babylonNode.animations);
}
if (babylonNode.extraAnimations != null)
{
babylonAnimations.AddRange(babylonNode.extraAnimations);
}
// Filter animations to only keep TRS ones
babylonAnimations = babylonAnimations.FindAll(babylonAnimation => _getTargetPath(babylonAnimation.property) != null);
if (babylonAnimations.Count > 0 || exportNonAnimated)
{
if (babylonAnimations.Count > 0)
{
logger.RaiseMessage("GLTFExporter.Animation | Export animations of node named: " + babylonNode.name, 2);
}
else if (exportNonAnimated)
{
logger.RaiseMessage("GLTFExporter.Animation | Export dummy animation for node named: " + babylonNode.name, 2);
// Export a dummy animation
babylonAnimations.Add(GetDummyAnimation(gltfNode, startFrame, endFrame, babylonScene));
}
foreach (BabylonAnimation babylonAnimation in babylonAnimations)
{
// Target
var gltfTarget = new GLTFChannelTarget
{
node = gltfNode.index
};
gltfTarget.path = _getTargetPath(babylonAnimation.property);
// --- Input ---
var accessorInput = _createAndPopulateInput(gltf, babylonAnimation, startFrame, endFrame);
if (accessorInput == null)
{
continue;
}
// --- Output ---
GLTFAccessor accessorOutput = _createAccessorOfPath(gltfTarget.path, gltf);
// Populate accessor
int numKeys = 0;
foreach (var babylonAnimationKey in babylonAnimation.keys)
{
if (babylonAnimationKey.frame < startFrame)
{
continue;
}
if (babylonAnimationKey.frame > endFrame)
{
continue;
}
numKeys++;
// copy data before changing it in case animation groups overlap
float[] outputValues = new float[babylonAnimationKey.values.Length];
babylonAnimationKey.values.CopyTo(outputValues, 0);
// Switch coordinate system at object level
if (babylonAnimation.property == "position")
{
outputValues[2] *= -1;
outputValues[0] *= exportParameters.scaleFactor;
outputValues[1] *= exportParameters.scaleFactor;
outputValues[2] *= exportParameters.scaleFactor;
}
else if (babylonAnimation.property == "rotationQuaternion")
{
outputValues[0] *= -1;
outputValues[1] *= -1;
}
// Store values as bytes
foreach (var outputValue in outputValues)
{
accessorOutput.bytesList.AddRange(BitConverter.GetBytes(outputValue));
}
}
;
accessorOutput.count = numKeys;
// bail out if no keyframes to export (?)
// todo [KeyInterpolation]: bail out only when there are no keyframes at all (?) and otherwise add the appropriate (interpolated) keyframes
if (numKeys == 0)
{
continue;
}
// Animation sampler
var gltfAnimationSampler = new GLTFAnimationSampler
{
input = accessorInput.index,
output = accessorOutput.index
};
gltfAnimationSampler.index = samplerList.Count;
samplerList.Add(gltfAnimationSampler);
// Channel
var gltfChannel = new GLTFChannel
{
sampler = gltfAnimationSampler.index,
target = gltfTarget
};
channelList.Add(gltfChannel);
}
}
if (babylonNode.GetType() == typeof(BabylonMesh))
{
var babylonMesh = babylonNode as BabylonMesh;
// Morph targets
var babylonMorphTargetManager = GetBabylonMorphTargetManager(babylonScene, babylonMesh);
if (babylonMorphTargetManager != null)
{
ExportMorphTargetWeightAnimation(babylonMorphTargetManager, gltf, gltfNode, channelList, samplerList, startFrame, endFrame, babylonScene);
}
}
}
private void _exportMorphTargets(BabylonMesh babylonMesh, BabylonMorphTargetManager babylonMorphTargetManager, GLTF gltf, GLTFBuffer buffer, GLTFMeshPrimitive meshPrimitive, List <float> weights)
{
var gltfMorphTargets = new List <GLTFMorphTarget>();
foreach (var babylonMorphTarget in babylonMorphTargetManager.targets)
{
var gltfMorphTarget = new GLTFMorphTarget();
// Positions
if (babylonMorphTarget.positions != null)
{
var accessorTargetPositions = GLTFBufferService.Instance.CreateAccessor(
gltf,
GLTFBufferService.Instance.GetBufferViewFloatVec3(gltf, buffer),
"accessorTargetPositions",
GLTFAccessor.ComponentType.FLOAT,
GLTFAccessor.TypeEnum.VEC3
);
gltfMorphTarget.Add(GLTFMorphTarget.Attribute.POSITION.ToString(), accessorTargetPositions.index);
// Populate accessor
accessorTargetPositions.min = new float[] { float.MaxValue, float.MaxValue, float.MaxValue };
accessorTargetPositions.max = new float[] { float.MinValue, float.MinValue, float.MinValue };
for (int indexPosition = 0; indexPosition < babylonMorphTarget.positions.Length; indexPosition += 3)
{
var positionTarget = Tools.SubArray(babylonMorphTarget.positions, indexPosition, 3);
// Babylon stores morph target information as final data while glTF expects deltas from mesh primitive
var positionMesh = Tools.SubArray(babylonMesh.positions, indexPosition, 3);
for (int indexCoordinate = 0; indexCoordinate < positionTarget.Length; indexCoordinate++)
{
positionTarget[indexCoordinate] = positionTarget[indexCoordinate] - positionMesh[indexCoordinate];
}
// Store values as bytes
foreach (var coordinate in positionTarget)
{
accessorTargetPositions.bytesList.AddRange(BitConverter.GetBytes(coordinate));
}
// Update min and max values
GLTFBufferService.UpdateMinMaxAccessor(accessorTargetPositions, positionTarget);
}
accessorTargetPositions.count = babylonMorphTarget.positions.Length / 3;
}
// Normals
if (babylonMorphTarget.normals != null)
{
var accessorTargetNormals = GLTFBufferService.Instance.CreateAccessor(
gltf,
GLTFBufferService.Instance.GetBufferViewFloatVec3(gltf, buffer),
"accessorTargetNormals",
GLTFAccessor.ComponentType.FLOAT,
GLTFAccessor.TypeEnum.VEC3
);
gltfMorphTarget.Add(GLTFMorphTarget.Attribute.NORMAL.ToString(), accessorTargetNormals.index);
// Populate accessor
for (int indexNormal = 0; indexNormal < babylonMorphTarget.positions.Length; indexNormal += 3)
{
var normalTarget = Tools.SubArray(babylonMorphTarget.normals, indexNormal, 3);
// Babylon stores morph target information as final data while glTF expects deltas from mesh primitive
var normalMesh = Tools.SubArray(babylonMesh.normals, indexNormal, 3);
for (int indexCoordinate = 0; indexCoordinate < normalTarget.Length; indexCoordinate++)
{
normalTarget[indexCoordinate] = normalTarget[indexCoordinate] - normalMesh[indexCoordinate];
}
// Store values as bytes
foreach (var coordinate in normalTarget)
{
accessorTargetNormals.bytesList.AddRange(BitConverter.GetBytes(coordinate));
}
}
accessorTargetNormals.count = babylonMorphTarget.normals.Length / 3;
}
if (gltfMorphTarget.Count > 0)
{
gltfMorphTargets.Add(gltfMorphTarget);
weights.Add(babylonMorphTarget.influence);
}
}
if (gltfMorphTargets.Count > 0)
{
meshPrimitive.targets = gltfMorphTargets.ToArray();
}
}
private GLTFTextureInfo ExportEmissiveTexture(BabylonStandardMaterial babylonMaterial, GLTF gltf, float[] defaultEmissive, float[] defaultDiffuse)
{
// Use one as a reference for UVs parameters
var babylonTexture = babylonMaterial.emissiveTexture != null ? babylonMaterial.emissiveTexture : babylonMaterial.diffuseTexture;
if (babylonTexture == null)
{
return(null);
}
// Anticipate if a black texture is going to be export
if (babylonMaterial.emissiveTexture == null && defaultEmissive.IsAlmostEqualTo(new float[] { 0, 0, 0 }, 0))
{
return(null);
}
// Check if the texture has already been exported
if (GetRegisteredEmissive(babylonMaterial, defaultDiffuse, defaultEmissive) != null)
{
return(GetRegisteredEmissive(babylonMaterial, defaultDiffuse, defaultEmissive));
}
Bitmap emissivePremultipliedBitmap = null;
if (exportParameters.writeTextures)
{
// Emissive
Bitmap emissiveBitmap = null;
if (babylonMaterial.emissiveTexture != null)
{
emissiveBitmap = TextureUtilities.LoadTexture(babylonMaterial.emissiveTexture.originalPath, logger);
}
// Diffuse
Bitmap diffuseBitmap = null;
if (babylonMaterial.diffuseTexture != null)
{
diffuseBitmap = TextureUtilities.LoadTexture(babylonMaterial.diffuseTexture.originalPath, logger);
}
if (emissiveBitmap != null || diffuseBitmap != null)
{
// Retreive dimensions
int width = 0;
int height = 0;
var haveSameDimensions = TextureUtilities.GetMinimalBitmapDimensions(out width, out height, emissiveBitmap, diffuseBitmap);
if (!haveSameDimensions)
{
logger.RaiseError("Emissive and diffuse maps should have same dimensions", 2);
}
// Create pre-multiplied emissive map
emissivePremultipliedBitmap = new Bitmap(width, height);
for (int x = 0; x < width; x++)
{
for (int y = 0; y < height; y++)
{
var _emissive = emissiveBitmap != null?emissiveBitmap.GetPixel(x, y).toArrayRGB().Multiply(1f / 255.0f) : defaultEmissive;
var _diffuse = diffuseBitmap != null?diffuseBitmap.GetPixel(x, y).toArrayRGB().Multiply(1f / 255.0f) : defaultDiffuse;
var emissivePremultiplied = _emissive.Multiply(_diffuse);
Color colorEmissivePremultiplied = Color.FromArgb(
(int)(emissivePremultiplied[0] * 255),
(int)(emissivePremultiplied[1] * 255),
(int)(emissivePremultiplied[2] * 255)
);
emissivePremultipliedBitmap.SetPixel(x, y, colorEmissivePremultiplied);
}
}
}
}
var emissiveTextureInfo = ExportBitmapTexture(gltf, babylonTexture, emissivePremultipliedBitmap);
// Register the texture for optimisation
RegisterEmissive(emissiveTextureInfo, babylonMaterial, defaultDiffuse, defaultEmissive);
return(emissiveTextureInfo);
}
private void ExportMaterial(BabylonMaterial babylonMaterial, GLTF gltf)
{
var name = babylonMaterial.name;
var id = babylonMaterial.id;
logger.RaiseMessage("GLTFExporter.Material | Export material named: " + name, 1);
GLTFMaterial gltfMaterial = null;
IGLTFMaterialExporter customMaterialExporter = exportParameters.customGLTFMaterialExporter;
if (customMaterialExporter != null && customMaterialExporter.GetGltfMaterial(babylonMaterial, gltf, logger, out gltfMaterial))
{
gltfMaterial.index = gltf.MaterialsList.Count;
gltf.MaterialsList.Add(gltfMaterial);
}
else if (babylonMaterial is BabylonStandardMaterial babylonStandardMaterial)
{
// --- prints ---
#region prints
logger.RaiseVerbose("GLTFExporter.Material | babylonMaterial data", 2);
logger.RaiseVerbose("GLTFExporter.Material | babylonMaterial.alpha=" + babylonMaterial.alpha, 3);
logger.RaiseVerbose("GLTFExporter.Material | babylonMaterial.alphaMode=" + babylonMaterial.alphaMode, 3);
logger.RaiseVerbose("GLTFExporter.Material | babylonMaterial.backFaceCulling=" + babylonMaterial.backFaceCulling, 3);
logger.RaiseVerbose("GLTFExporter.Material | babylonMaterial.wireframe=" + babylonMaterial.wireframe, 3);
// Ambient
for (int i = 0; i < babylonStandardMaterial.ambient.Length; i++)
{
logger.RaiseVerbose("GLTFExporter.Material | babylonStandardMaterial.ambient[" + i + "]=" + babylonStandardMaterial.ambient[i], 3);
}
// Diffuse
logger.RaiseVerbose("GLTFExporter.Material | babylonStandardMaterial.diffuse.Length=" + babylonStandardMaterial.diffuse.Length, 3);
for (int i = 0; i < babylonStandardMaterial.diffuse.Length; i++)
{
logger.RaiseVerbose("GLTFExporter.Material | babylonStandardMaterial.diffuse[" + i + "]=" + babylonStandardMaterial.diffuse[i], 3);
}
if (babylonStandardMaterial.diffuseTexture == null)
{
logger.RaiseVerbose("GLTFExporter.Material | babylonStandardMaterial.diffuseTexture=null", 3);
}
else
{
logger.RaiseVerbose("GLTFExporter.Material | babylonStandardMaterial.diffuseTexture.name=" + babylonStandardMaterial.diffuseTexture.name, 3);
}
// Normal / bump
if (babylonStandardMaterial.bumpTexture == null)
{
logger.RaiseVerbose("GLTFExporter.Material | babylonStandardMaterial.bumpTexture=null", 3);
}
else
{
logger.RaiseVerbose("GLTFExporter.Material | babylonStandardMaterial.bumpTexture.name=" + babylonStandardMaterial.bumpTexture.name, 3);
}
// Opacity
if (babylonStandardMaterial.opacityTexture == null)
{
logger.RaiseVerbose("GLTFExporter.Material | babylonStandardMaterial.opacityTexture=null", 3);
}
else
{
logger.RaiseVerbose("GLTFExporter.Material | babylonStandardMaterial.opacityTexture.name=" + babylonStandardMaterial.opacityTexture.name, 3);
}
// Specular
for (int i = 0; i < babylonStandardMaterial.specular.Length; i++)
{
logger.RaiseVerbose("GLTFExporter.Material | babylonStandardMaterial.specular[" + i + "]=" + babylonStandardMaterial.specular[i], 3);
}
logger.RaiseVerbose("GLTFExporter.Material | babylonStandardMaterial.specularPower=" + babylonStandardMaterial.specularPower, 3);
if (babylonStandardMaterial.specularTexture == null)
{
logger.RaiseVerbose("GLTFExporter.Material | babylonStandardMaterial.specularTexture=null", 3);
}
else
{
logger.RaiseVerbose("GLTFExporter.Material | babylonStandardMaterial.specularTexture.name=" + babylonStandardMaterial.specularTexture.name, 3);
}
// Occlusion
if (babylonStandardMaterial.ambientTexture == null)
{
logger.RaiseVerbose("GLTFExporter.Material | babylonStandardMaterial.ambientTexture=null", 3);
}
else
{
logger.RaiseVerbose("GLTFExporter.Material | babylonStandardMaterial.ambientTexture.name=" + babylonStandardMaterial.ambientTexture.name, 3);
}
// Emissive
for (int i = 0; i < babylonStandardMaterial.emissive.Length; i++)
{
logger.RaiseVerbose("GLTFExporter.Material | babylonStandardMaterial.emissive[" + i + "]=" + babylonStandardMaterial.emissive[i], 3);
}
if (babylonStandardMaterial.emissiveTexture == null)
{
logger.RaiseVerbose("GLTFExporter.Material | babylonStandardMaterial.emissiveTexture=null", 3);
}
else
{
logger.RaiseVerbose("GLTFExporter.Material | babylonStandardMaterial.emissiveTexture.name=" + babylonStandardMaterial.emissiveTexture.name, 3);
}
#endregion
// --------------------------------
// --------- gltfMaterial ---------
// --------------------------------
logger.RaiseMessage("GLTFExporter.Material | create gltfMaterial", 2);
gltfMaterial = new GLTFMaterial
{
name = name
};
gltfMaterial.id = babylonMaterial.id;
gltfMaterial.index = gltf.MaterialsList.Count;
gltf.MaterialsList.Add(gltfMaterial);
//Custom user properties
if (babylonStandardMaterial.metadata != null && babylonStandardMaterial.metadata.Count != 0)
{
gltfMaterial.extras = babylonStandardMaterial.metadata;
}
// Alpha
GLTFMaterial.AlphaMode alphaMode;
float?alphaCutoff;
getAlphaMode(babylonStandardMaterial, out alphaMode, out alphaCutoff);
gltfMaterial.alphaMode = alphaMode;
if (alphaCutoff.HasValue && alphaCutoff.Value != 0.5f) // do not export glTF default value
{
gltfMaterial.alphaCutoff = alphaCutoff;
}
// DoubleSided
gltfMaterial.doubleSided = !babylonMaterial.backFaceCulling;
// Normal
gltfMaterial.normalTexture = ExportTexture(babylonStandardMaterial.bumpTexture, gltf);
// Occlusion
gltfMaterial.occlusionTexture = ExportTexture(babylonStandardMaterial.ambientTexture, gltf);
// Emissive
gltfMaterial.emissiveFactor = babylonStandardMaterial.emissive;
// linkEmissiveWithDiffuse attribute doesn't have an equivalent in gltf format
// When true, the emissive texture needs to be manually multiplied with diffuse texture
// Otherwise, the emissive texture is assumed to be already pre-multiplied
if (babylonStandardMaterial.linkEmissiveWithDiffuse)
{
// Even when no emissive texture is provided, the self illumination value needs to be multiplied to the diffuse texture in order to get the pre-multiplied emissive (texture)
if (babylonStandardMaterial.emissiveTexture != null || babylonStandardMaterial.selfIllum > 0)
{
// Default emissive is the raw value of the self illumination
// It is not the babylon emissive value which is already pre-multiplied with diffuse color
float[] defaultEmissive = new float[] { 1, 1, 1 }.Multiply(babylonStandardMaterial.selfIllum);
gltfMaterial.emissiveTexture = ExportEmissiveTexture(babylonStandardMaterial, gltf, defaultEmissive, babylonStandardMaterial.diffuse);
}
}
else
{
gltfMaterial.emissiveTexture = ExportTexture(babylonStandardMaterial.emissiveTexture, gltf);
}
// Constraints
if (gltfMaterial.emissiveTexture != null)
{
gltfMaterial.emissiveFactor = new[] { 1.0f, 1.0f, 1.0f };
}
// --------------------------------
// --- gltfPbrMetallicRoughness ---
// --------------------------------
logger.RaiseMessage("GLTFExporter.Material | create gltfPbrMetallicRoughness", 2);
var gltfPbrMetallicRoughness = new GLTFPBRMetallicRoughness();
gltfMaterial.pbrMetallicRoughness = gltfPbrMetallicRoughness;
// --- Global ---
SpecularGlossiness _specularGlossiness = new SpecularGlossiness
{
diffuse = new BabylonColor3(babylonStandardMaterial.diffuse),
opacity = babylonMaterial.alpha,
specular = new BabylonColor3(babylonStandardMaterial.specular),
glossiness = babylonStandardMaterial.specularPower / 256
};
MetallicRoughness _metallicRoughness = ConvertToMetallicRoughness(_specularGlossiness, true);
// Base color
gltfPbrMetallicRoughness.baseColorFactor = new float[4]
{
_metallicRoughness.baseColor.r,
_metallicRoughness.baseColor.g,
_metallicRoughness.baseColor.b,
_metallicRoughness.opacity
};
// Metallic roughness
gltfPbrMetallicRoughness.metallicFactor = _metallicRoughness.metallic;
gltfPbrMetallicRoughness.roughnessFactor = _metallicRoughness.roughness;
// --- Textures ---
var babylonTexture = babylonStandardMaterial.diffuseTexture != null ? babylonStandardMaterial.diffuseTexture :
babylonStandardMaterial.specularTexture != null ? babylonStandardMaterial.specularTexture :
babylonStandardMaterial.opacityTexture != null ? babylonStandardMaterial.opacityTexture :
null;
if (babylonTexture != null)
{
//Check if the texture already exist
var _key = SetStandText(babylonStandardMaterial);
if (GetStandTextInfo(_key) != null)
{
var _pairBCMR = GetStandTextInfo(_key);
gltfPbrMetallicRoughness.baseColorTexture = _pairBCMR.baseColor;
gltfPbrMetallicRoughness.metallicRoughnessTexture = _pairBCMR.metallicRoughness;
}
else
{
bool isAlphaInTexture = (isTextureOk(babylonStandardMaterial.diffuseTexture) && babylonStandardMaterial.diffuseTexture.hasAlpha) ||
isTextureOk(babylonStandardMaterial.opacityTexture);
Bitmap baseColorBitmap = null;
Bitmap metallicRoughnessBitmap = null;
string baseColorBitmapName = null;
string metallicRoughnessBitmapName = null;
GLTFTextureInfo textureInfoBC = null;
GLTFTextureInfo textureInfoMR = null;
if (exportParameters.writeTextures)
{
// Diffuse
Bitmap diffuseBitmap = null;
if (babylonStandardMaterial.diffuseTexture != null)
{
if (babylonStandardMaterial.diffuseTexture.bitmap != null)
{
// Diffuse color map has been computed by the exporter
diffuseBitmap = babylonStandardMaterial.diffuseTexture.bitmap;
}
else
{
// Diffuse color map is straight input
diffuseBitmap = TextureUtilities.LoadTexture(babylonStandardMaterial.diffuseTexture.originalPath, logger);
babylonStandardMaterial.diffuseTexture.bitmap = diffuseBitmap;
}
}
// Specular
Bitmap specularBitmap = null;
if (babylonStandardMaterial.specularTexture != null)
{
if (babylonStandardMaterial.specularTexture.bitmap != null)
{
// Specular color map has been computed by the exporter
specularBitmap = babylonStandardMaterial.specularTexture.bitmap;
}
else
{
// Specular color map is straight input
specularBitmap = TextureUtilities.LoadTexture(babylonStandardMaterial.specularTexture.originalPath, logger);
}
}
// Opacity / Alpha / Transparency
Bitmap opacityBitmap = null;
if ((babylonStandardMaterial.diffuseTexture == null || babylonStandardMaterial.diffuseTexture.hasAlpha == false) && babylonStandardMaterial.opacityTexture != null)
{
opacityBitmap = TextureUtilities.LoadTexture(babylonStandardMaterial.opacityTexture.originalPath, logger);
}
if ((diffuseBitmap != null && (specularBitmap != null || opacityBitmap != null)) || specularBitmap != null || opacityBitmap != null)
{
// Retreive dimensions
int width = 0;
int height = 0;
var haveSameDimensions = TextureUtilities.GetMinimalBitmapDimensions(out width, out height, diffuseBitmap, specularBitmap, opacityBitmap);
if (!haveSameDimensions)
{
logger.RaiseError("Diffuse, specular and opacity maps should have same dimensions", 2);
}
baseColorBitmapName = (babylonStandardMaterial.diffuseTexture != null ? Path.GetFileNameWithoutExtension(babylonStandardMaterial.diffuseTexture.name) : TextureUtilities.ColorToStringName(Color.FromArgb(255, (int)(babylonStandardMaterial.diffuse[0]), (int)(babylonStandardMaterial.diffuse[1]), (int)(babylonStandardMaterial.diffuse[2]))))
+ (babylonStandardMaterial.opacityTexture != null ? "_alpha_" + Path.GetFileNameWithoutExtension(babylonStandardMaterial.opacityTexture.name) : "")
+ ".png";
metallicRoughnessBitmapName = "MR_" + baseColorBitmapName
+ "_spec_" + (babylonStandardMaterial.specularTexture != null ? Path.GetFileNameWithoutExtension(babylonStandardMaterial.specularTexture.name) : TextureUtilities.ColorToStringName(Color.FromArgb(255, (int)(babylonStandardMaterial.specular[0]), (int)(babylonStandardMaterial.specular[1]), (int)(babylonStandardMaterial.specular[2]))))
+ "_gloss_" + babylonStandardMaterial.specularPower
+ ".png";
// Create baseColor+alpha and metallic+roughness maps
baseColorBitmap = new Bitmap(width, height);
metallicRoughnessBitmap = new Bitmap(width, height);
for (int x = 0; x < width; x++)
{
for (int y = 0; y < height; y++)
{
SpecularGlossiness specularGlossinessTexture = new SpecularGlossiness
{
diffuse = diffuseBitmap != null ? new BabylonColor3(diffuseBitmap.GetPixel(x, y)) :
_specularGlossiness.diffuse,
opacity = diffuseBitmap != null && babylonStandardMaterial.diffuseTexture.hasAlpha ? diffuseBitmap.GetPixel(x, y).A / 255.0f :
opacityBitmap != null && babylonStandardMaterial.opacityTexture.getAlphaFromRGB ? opacityBitmap.GetPixel(x, y).R / 255.0f :
opacityBitmap != null && babylonStandardMaterial.opacityTexture.getAlphaFromRGB == false?opacityBitmap.GetPixel(x, y).A / 255.0f :
_specularGlossiness.opacity,
specular = specularBitmap != null ? new BabylonColor3(specularBitmap.GetPixel(x, y)) :
_specularGlossiness.specular,
glossiness = babylonStandardMaterial.useGlossinessFromSpecularMapAlpha && specularBitmap != null?specularBitmap.GetPixel(x, y).A / 255.0f :
_specularGlossiness.glossiness
};
var displayPrints = x == width / 2 && y == height / 2;
MetallicRoughness metallicRoughnessTexture = ConvertToMetallicRoughness(specularGlossinessTexture, displayPrints);
Color colorBase = Color.FromArgb(
(int)(metallicRoughnessTexture.opacity * 255),
(int)(metallicRoughnessTexture.baseColor.r * 255),
(int)(metallicRoughnessTexture.baseColor.g * 255),
(int)(metallicRoughnessTexture.baseColor.b * 255)
);
baseColorBitmap.SetPixel(x, y, colorBase);
// The metalness values are sampled from the B channel.
// The roughness values are sampled from the G channel.
// These values are linear. If other channels are present (R or A), they are ignored for metallic-roughness calculations.
Color colorMetallicRoughness = Color.FromArgb(
0,
(int)(metallicRoughnessTexture.roughness * 255),
(int)(metallicRoughnessTexture.metallic * 255)
);
metallicRoughnessBitmap.SetPixel(x, y, colorMetallicRoughness);
}
}
}
}
//export textures
if (baseColorBitmap != null || babylonTexture.bitmap != null)
{
textureInfoBC = ExportBitmapTexture(gltf, babylonTexture, baseColorBitmap, baseColorBitmapName);
gltfPbrMetallicRoughness.baseColorTexture = textureInfoBC;
}
if (isTextureOk(babylonStandardMaterial.specularTexture))
{
textureInfoMR = ExportBitmapTexture(gltf, babylonTexture, metallicRoughnessBitmap, metallicRoughnessBitmapName);
gltfPbrMetallicRoughness.metallicRoughnessTexture = textureInfoMR;
}
//register the texture
AddStandText(_key, textureInfoBC, textureInfoMR);
}
// Constraints
if (gltfPbrMetallicRoughness.baseColorTexture != null)
{
gltfPbrMetallicRoughness.baseColorFactor[3] = 1.0f;
}
if (gltfPbrMetallicRoughness.metallicRoughnessTexture != null)
{
gltfPbrMetallicRoughness.metallicFactor = 1.0f;
gltfPbrMetallicRoughness.roughnessFactor = 1.0f;
}
}
}
else if (typeof(BabylonPBRBaseSimpleMaterial).IsAssignableFrom(babylonMaterial.GetType()))
{
var babylonPBRBaseSimpleMaterial = babylonMaterial as BabylonPBRBaseSimpleMaterial;
// --- prints ---
#region prints
logger.RaiseVerbose("GLTFExporter.Material | babylonMaterial data", 2);
logger.RaiseVerbose("GLTFExporter.Material | babylonMaterial.alpha=" + babylonMaterial.alpha, 3);
logger.RaiseVerbose("GLTFExporter.Material | babylonMaterial.alphaMode=" + babylonMaterial.alphaMode, 3);
logger.RaiseVerbose("GLTFExporter.Material | babylonMaterial.backFaceCulling=" + babylonMaterial.backFaceCulling, 3);
logger.RaiseVerbose("GLTFExporter.Material | babylonMaterial.wireframe=" + babylonMaterial.wireframe, 3);
// Global
logger.RaiseVerbose("GLTFExporter.Material | babylonPBRBaseSimpleMaterial.maxSimultaneousLights=" + babylonPBRBaseSimpleMaterial.maxSimultaneousLights, 3);
logger.RaiseVerbose("GLTFExporter.Material | babylonPBRBaseSimpleMaterial.disableLighting=" + babylonPBRBaseSimpleMaterial.disableLighting, 3);
logger.RaiseVerbose("GLTFExporter.Material | babylonPBRBaseSimpleMaterial.alphaCutOff=" + babylonPBRBaseSimpleMaterial.alphaCutOff, 3);
logger.RaiseVerbose("GLTFExporter.Material | babylonPBRBaseSimpleMaterial.transparencyMode=" + babylonPBRBaseSimpleMaterial.transparencyMode, 3);
logger.RaiseVerbose("GLTFExporter.Material | babylonPBRBaseSimpleMaterial.doubleSided=" + babylonPBRBaseSimpleMaterial.doubleSided, 3);
// Base color
logger.RaiseVerbose("GLTFExporter.Material | babylonPBRBaseSimpleMaterial.baseColor.Length=" + babylonPBRBaseSimpleMaterial.baseColor.Length, 3);
for (int i = 0; i < babylonPBRBaseSimpleMaterial.baseColor.Length; i++)
{
logger.RaiseVerbose("GLTFExporter.Material | babylonPBRBaseSimpleMaterial.baseColor[" + i + "]=" + babylonPBRBaseSimpleMaterial.baseColor[i], 3);
}
if (babylonPBRBaseSimpleMaterial.baseTexture == null)
{
logger.RaiseVerbose("GLTFExporter.Material | babylonPBRBaseSimpleMaterial.baseTexture=null", 3);
}
// Normal / bump
if (babylonPBRBaseSimpleMaterial.normalTexture == null)
{
logger.RaiseVerbose("GLTFExporter.Material | babylonPBRBaseSimpleMaterial.normalTexture=null", 3);
}
logger.RaiseVerbose("GLTFExporter.Material | babylonPBRBaseSimpleMaterial.invertNormalMapX=" + babylonPBRBaseSimpleMaterial.invertNormalMapX, 3);
logger.RaiseVerbose("GLTFExporter.Material | babylonPBRBaseSimpleMaterial.invertNormalMapY=" + babylonPBRBaseSimpleMaterial.invertNormalMapY, 3);
// Emissive
for (int i = 0; i < babylonPBRBaseSimpleMaterial.emissive.Length; i++)
{
logger.RaiseVerbose("GLTFExporter.Material | babylonPBRBaseSimpleMaterial.emissiveColor[" + i + "]=" + babylonPBRBaseSimpleMaterial.emissive[i], 3);
}
if (babylonPBRBaseSimpleMaterial.emissiveTexture == null)
{
logger.RaiseVerbose("GLTFExporter.Material | babylonPBRBaseSimpleMaterial.emissiveTexture=null", 3);
}
// Ambient occlusion
logger.RaiseVerbose("GLTFExporter.Material | babylonPBRBaseSimpleMaterial.occlusionStrength=" + babylonPBRBaseSimpleMaterial.occlusionStrength, 3);
if (babylonPBRBaseSimpleMaterial.occlusionTexture == null)
{
logger.RaiseVerbose("GLTFExporter.Material | babylonPBRBaseSimpleMaterial.occlusionTexture=null", 3);
}
if (babylonMaterial is BabylonPBRMetallicRoughnessMaterial pbrMRMatPrint)
{
// Metallic+roughness
logger.RaiseVerbose("GLTFExporter.Material | babylonPBRMetallicRoughnessMaterial.metallic=" + pbrMRMatPrint.metallic, 3);
logger.RaiseVerbose("GLTFExporter.Material | babylonPBRMetallicRoughnessMaterial.roughness=" + pbrMRMatPrint.roughness, 3);
if (pbrMRMatPrint.metallicRoughnessTexture == null)
{
logger.RaiseVerbose("GLTFExporter.Material | babylonPBRMetallicRoughnessMaterial.metallicRoughnessTexture=null", 3);
}
}
else if (babylonMaterial is BabylonPBRSpecularGlossinessMaterial pbrSGMatPrint)
{
// Metallic+roughness
logger.RaiseVerbose("GLTFExporter.Material | babylonPBRSpecularGlossinessMaterial.specular=" + pbrSGMatPrint.specularColor, 3);
logger.RaiseVerbose("GLTFExporter.Material | babylonPBRSpecularGlossinessMaterial.glossiness=" + pbrSGMatPrint.glossiness, 3);
if (pbrSGMatPrint.specularGlossinessTexture == null)
{
logger.RaiseVerbose("GLTFExporter.Material | babylonPBRSpecularGlossinessMaterial.specularGlossinessTexture=null", 3);
}
}
#endregion
// --------------------------------
// --------- gltfMaterial ---------
// --------------------------------
logger.RaiseMessage("GLTFExporter.Material | create gltfMaterial", 2);
gltfMaterial = new GLTFMaterial
{
name = name
};
gltfMaterial.id = babylonMaterial.id;
gltfMaterial.index = gltf.MaterialsList.Count;
gltf.MaterialsList.Add(gltfMaterial);
//Custom user properties
if (babylonMaterial.metadata != null && babylonMaterial.metadata.Count != 0)
{
gltfMaterial.extras = babylonMaterial.metadata;
}
// Alpha
GLTFMaterial.AlphaMode alphaMode;
float?alphaCutoff;
getAlphaMode(babylonPBRBaseSimpleMaterial, out alphaMode, out alphaCutoff);
gltfMaterial.alphaMode = alphaMode;
if (alphaCutoff.HasValue && alphaCutoff.Value != 0.5f) // do not export glTF default value
{
gltfMaterial.alphaCutoff = alphaCutoff;
}
// DoubleSided
gltfMaterial.doubleSided = babylonPBRBaseSimpleMaterial.doubleSided;
// Normal
gltfMaterial.normalTexture = ExportTexture(babylonPBRBaseSimpleMaterial.normalTexture, gltf);
// Occlusion
if (babylonPBRBaseSimpleMaterial.occlusionTexture != null)
{
if (babylonPBRBaseSimpleMaterial.occlusionTexture.bitmap != null)
{
// ORM texture has been merged manually by the exporter
// Occlusion is defined as well as metallic and/or roughness
logger.RaiseVerbose("Occlusion is defined as well as metallic and/or roughness", 2);
gltfMaterial.occlusionTexture = ExportBitmapTexture(gltf, babylonPBRBaseSimpleMaterial.occlusionTexture);
}
else
{
// ORM texture was already merged or only occlusion is defined
logger.RaiseVerbose("ORM texture was already merged or only occlusion is defined", 2);
gltfMaterial.occlusionTexture = ExportTexture(babylonPBRBaseSimpleMaterial.occlusionTexture, gltf);
}
}
// Emissive
gltfMaterial.emissiveFactor = babylonPBRBaseSimpleMaterial.emissive;
gltfMaterial.emissiveTexture = ExportTexture(babylonPBRBaseSimpleMaterial.emissiveTexture, gltf);
// --------------------------------
// --- gltfPbrMetallicRoughness ---
// --------------------------------
if (babylonMaterial is BabylonPBRMetallicRoughnessMaterial pbrMRMat)
{
// Metallic+roughness
logger.RaiseVerbose("GLTFExporter.Material | babylonPBRMetallicRoughnessMaterial.metallic=" + pbrMRMat.metallic, 3);
logger.RaiseVerbose("GLTFExporter.Material | babylonPBRMetallicRoughnessMaterial.roughness=" + pbrMRMat.roughness, 3);
if (pbrMRMat.metallicRoughnessTexture == null)
{
logger.RaiseVerbose("GLTFExporter.Material | babylonPBRMetallicRoughnessMaterial.metallicRoughnessTexture=null", 3);
}
logger.RaiseMessage("GLTFExporter.Material | create gltfPbrMetallicRoughness", 2);
var gltfPbrMetallicRoughness = new GLTFPBRMetallicRoughness();
gltfMaterial.pbrMetallicRoughness = gltfPbrMetallicRoughness;
// --- Global ---
// Base color
gltfPbrMetallicRoughness.baseColorFactor = new float[4]
{
pbrMRMat.baseColor[0],
pbrMRMat.baseColor[1],
pbrMRMat.baseColor[2],
pbrMRMat.alpha
};
if (pbrMRMat.baseTexture != null)
{
gltfPbrMetallicRoughness.baseColorTexture = ExportBaseColorTexture(gltf, pbrMRMat.baseTexture);
}
// Metallic roughness
gltfPbrMetallicRoughness.metallicFactor = pbrMRMat.metallic;
gltfPbrMetallicRoughness.roughnessFactor = pbrMRMat.roughness;
if (pbrMRMat.metallicRoughnessTexture != null)
{
if (pbrMRMat.metallicRoughnessTexture == pbrMRMat.occlusionTexture)
{
// Occlusion is defined as well as metallic and/or roughness
// Use same texture
logger.RaiseVerbose("Occlusion is defined as well as metallic and/or roughness", 2);
gltfPbrMetallicRoughness.metallicRoughnessTexture = gltfMaterial.occlusionTexture;
}
else
{
// Occlusion is not defined, only metallic and/or roughness
logger.RaiseVerbose("Occlusion is not defined, only metallic and/or roughness", 2);
if (pbrMRMat.metallicRoughnessTexture.bitmap != null)
{
// Metallic & roughness texture has been merged manually by the exporter
// Write bitmap file
logger.RaiseVerbose("Metallic & roughness texture has been merged manually by the exporter", 2);
gltfPbrMetallicRoughness.metallicRoughnessTexture = ExportBitmapTexture(gltf, pbrMRMat.metallicRoughnessTexture);
}
else
{
// Metallic & roughness texture was already merged
// Copy file
logger.RaiseVerbose("Metallic & roughness texture was already merged", 2);
gltfPbrMetallicRoughness.metallicRoughnessTexture = ExportTexture(pbrMRMat.metallicRoughnessTexture, gltf);
}
}
}
}
else if (babylonMaterial is BabylonPBRSpecularGlossinessMaterial pbrSGMat)
{
var ext = new KHR_materials_pbrSpecularGlossiness()
{
specularFactor = pbrSGMat.specularColor,
glossinessFactor = pbrSGMat.glossiness,
diffuseTexture = ExportTexture(pbrSGMat.diffuseTexture, gltf),
specularGlossinessTexture = ExportTexture(pbrSGMat.specularGlossinessTexture, gltf)
};
gltfMaterial.extensions = gltfMaterial.extensions ?? new GLTFExtensions(); // ensure extensions exist
gltfMaterial.extensions.AddExtension(gltf, "KHR_materials_pbrSpecularGlossiness", ext);
}
}
else if (babylonMaterial.GetType() == typeof(BabylonFurMaterial))
{
// TODO - Implement proper handling of BabylonFurMaterial once gLTF spec has support
var babylonPBRFurMaterial = babylonMaterial as BabylonFurMaterial;
gltfMaterial = new GLTFMaterial
{
name = name
};
gltfMaterial.id = babylonMaterial.id;
gltfMaterial.index = gltf.MaterialsList.Count;
gltf.MaterialsList.Add(gltfMaterial);
//Custom user properties
if (babylonPBRFurMaterial.metadata != null && babylonPBRFurMaterial.metadata.Count != 0)
{
gltfMaterial.extras = babylonPBRFurMaterial.metadata;
}
}
else
{
logger.RaiseWarning("GLTFExporter.Material | Unsupported material type: " + babylonMaterial.GetType(), 2);
}
if (gltfMaterial != null && babylonMaterial.isUnlit)
{
// Add Unlit extension
if (!exportParameters.enableKHRMaterialsUnlit)
{
logger.RaiseWarning("GLTFExporter.Material | KHR_materials_unlit has not been enabled for export!", 2);
}
else
{
if (gltfMaterial.extensions == null)
{
gltfMaterial.extensions = new GLTFExtensions();
}
if (gltf.extensionsUsed == null)
{
gltf.extensionsUsed = new System.Collections.Generic.List <string>();
}
if (!gltf.extensionsUsed.Contains("KHR_materials_unlit"))
{
gltf.extensionsUsed.Add("KHR_materials_unlit");
}
gltfMaterial.extensions["KHR_materials_unlit"] = new object();
}
}
}
private GLTFTextureInfo ExportTexture(BabylonTexture babylonTexture, GLTF gltf, string name)
{
if (babylonTexture == null)
{
return(null);
}
if (name == null)
{
name = babylonTexture.name;
}
logger.RaiseMessage("GLTFExporter.Texture | Export texture named: " + name, 2);
if (glTFTextureInfoMap.ContainsKey(babylonTexture.Id))
{
return(glTFTextureInfoMap[babylonTexture.Id]);
}
else
{
var sourcePath = babylonTexture.originalPath;
if (babylonTexture.bitmap != null)
{
sourcePath = Path.Combine(gltf.OutputFolder, name);
}
if (sourcePath == null || sourcePath == "")
{
logger.RaiseWarning("Texture path is missing.", 3);
return(null);
}
var validImageFormat = TextureUtilities.GetValidImageFormat(Path.GetExtension(sourcePath));
if (validImageFormat == null)
{
// Image format is not supported by the exporter
logger.RaiseWarning(string.Format("Format of texture {0} is not supported by the exporter. Consider using a standard image format like jpg or png.", Path.GetFileName(sourcePath)), 3);
return(null);
}
var destPath = Path.Combine(gltf.OutputFolder, name);
destPath = Path.ChangeExtension(destPath, validImageFormat);
name = Path.ChangeExtension(name, validImageFormat);
// --------------------------
// -------- Sampler ---------
// --------------------------
logger.RaiseMessage("GLTFExporter.Texture | create sampler", 3);
GLTFSampler gltfSampler = new GLTFSampler();
gltfSampler.index = gltf.SamplersList.Count;
// --- Retrieve info from babylon texture ---
// Mag and min filters
GLTFSampler.TextureMagFilter?magFilter;
GLTFSampler.TextureMinFilter?minFilter;
getSamplingParameters(babylonTexture.samplingMode, out magFilter, out minFilter);
gltfSampler.magFilter = magFilter;
gltfSampler.minFilter = minFilter;
// WrapS and wrapT
gltfSampler.wrapS = getWrapMode(babylonTexture.wrapU);
gltfSampler.wrapT = getWrapMode(babylonTexture.wrapV);
var matchingSampler = gltf.SamplersList.FirstOrDefault(sampler => sampler.wrapS == gltfSampler.wrapS && sampler.wrapT == gltfSampler.wrapT && sampler.magFilter == gltfSampler.magFilter && sampler.minFilter == gltfSampler.minFilter);
if (matchingSampler != null)
{
gltfSampler = matchingSampler;
}
else
{
gltf.SamplersList.Add(gltfSampler);
}
// --------------------------
// --------- Image ----------
// --------------------------
logger.RaiseMessage("GLTFExporter.Texture | create image", 3);
GLTFImage gltfImage = null;
string ImageName = name;
if (exportParameters.tryToReuseOpaqueAndBlendTexture)
{
if (!string.IsNullOrEmpty(babylonTexture.baseColorPath))
{
if (string.IsNullOrEmpty(babylonTexture.alphaPath))
{
// lets search previous similar image
ImageName = BaseColorAlphaImageNameLookup(babylonTexture, ImageName);
}
else
{
// register Pair with ImageName
RegisterBaseColorAlphaImageName(babylonTexture, ImageName);
}
}
}
if (glTFImageMap.ContainsKey(ImageName))
{
gltfImage = glTFImageMap[ImageName];
}
else
{
string textureUri = ImageName;
if (!string.IsNullOrWhiteSpace(exportParameters.textureFolder))
{
textureUri = PathUtilities.GetRelativePath(exportParameters.outputPath, exportParameters.textureFolder);
textureUri = Path.Combine(textureUri, ImageName);
}
gltfImage = new GLTFImage
{
uri = textureUri
};
gltfImage.index = gltf.ImagesList.Count;
gltf.ImagesList.Add(gltfImage);
switch (validImageFormat)
{
case "jpg":
gltfImage.FileExtension = "jpeg";
break;
case "png":
gltfImage.FileExtension = "png";
break;
}
if (exportParameters.outputFormat == "glb")
{
var imageBufferView = WriteImageToGltfBuffer(gltf, gltfImage, sourcePath, babylonTexture.bitmap);
gltfImage.uri = null;
gltfImage.bufferView = imageBufferView.index;
gltfImage.mimeType = "image/" + gltfImage.FileExtension;
}
else
{
if (exportParameters.writeTextures)
{
if (babylonTexture.bitmap != null)
{
// We may have modified this texture image, copy the buffer contents to disk
var extension = Path.GetExtension(ImageName).ToLower();
var imageFormat = extension == ".jpg" ? System.Drawing.Imaging.ImageFormat.Jpeg : System.Drawing.Imaging.ImageFormat.Png;
logger.RaiseMessage($"GLTFExporter.Texture | write image '{ImageName}' to '{destPath}'", 3);
TextureUtilities.SaveBitmap(babylonTexture.bitmap, destPath, imageFormat, exportParameters.txtQuality, logger);
}
else
{
// Copy texture from source to output
TextureUtilities.CopyTexture(sourcePath, destPath, exportParameters.txtQuality, logger);
}
}
}
glTFImageMap.Add(ImageName, gltfImage);
}
// --------------------------
// -------- Texture ---------
// --------------------------
logger.RaiseMessage("GLTFExporter.Texture | create texture", 3);
var gltfTexture = new GLTFTexture
{
name = name,
sampler = gltfSampler.index,
source = gltfImage.index
};
gltfTexture.index = gltf.TexturesList.Count;
if (!CheckIfImageIsRegistered(name))
{
gltf.TexturesList.Add(gltfTexture);
}
else
{
gltfTexture = gltf.TexturesList[GetRegisteredTexture(gltfTexture.name).index];
}
// --------------------------
// ------ TextureInfo -------
// --------------------------
var gltfTextureInfo = new GLTFTextureInfo
{
index = gltfTexture.index,
texCoord = babylonTexture.coordinatesIndex
};
if (babylonTexture.level != 1.0)
{
gltfTextureInfo.scale = babylonTexture.level;
}
if (!(babylonTexture.uOffset == 0) || !(babylonTexture.vOffset == 0) || !(babylonTexture.uScale == 1) || !(babylonTexture.vScale == 1) || !(babylonTexture.wAng == 0))
{
// Add texture extension if enabled in the export settings
if (exportParameters.enableKHRTextureTransform)
{
AddTextureTransformExtension(ref gltf, ref gltfTextureInfo, babylonTexture);
}
else
{
logger.RaiseWarning("GLTFExporter.Texture | KHR_texture_transform is not enabled, so the texture may look incorrect at runtime!", 3);
logger.RaiseWarning("GLTFExporter.Texture | KHR_texture_transform is not enabled, so the texture may look incorrect at runtime!", 3);
}
}
var textureID = name + TextureTransformID(gltfTextureInfo);
// Check for texture optimization. This is done here after the texture transform has been potentially applied to the texture extension
if (CheckIfImageIsRegistered(textureID))
{
var textureComponent = GetRegisteredTexture(textureID);
return(textureComponent);
}
// Add the texture in the dictionary
RegisterTexture(gltfTextureInfo, textureID);
glTFTextureInfoMap[babylonTexture.Id] = gltfTextureInfo;
return(gltfTextureInfo);
}
}
private GLTFNode _exportBone(BabylonBone babylonBone, GLTF gltf, BabylonSkeleton babylonSkeleton, List <BabylonBone> bones)
{
var nodeNodePair = nodeToGltfNodeMap.FirstOrDefault(pair => pair.Key.id.Equals(babylonBone.id));
if (nodeNodePair.Key != null)
{
return(nodeNodePair.Value);
}
var boneNodePair = boneToGltfNodeMap.FirstOrDefault(pair => pair.Key.id.Equals(babylonBone.id));
if (boneNodePair.Key != null)
{
return(boneNodePair.Value);
}
// Node
var gltfNode = new GLTFNode
{
name = babylonBone.name,
index = gltf.NodesList.Count
};
gltf.NodesList.Add(gltfNode);
boneToGltfNodeMap.Add(babylonBone, gltfNode);
// Hierarchy
if (babylonBone.parentBoneIndex >= 0)
{
var babylonParentBone = bones.Find(_babylonBone => _babylonBone.index == babylonBone.parentBoneIndex);
var gltfParentNode = _exportBone(babylonParentBone, gltf, babylonSkeleton, bones);
RaiseMessage("GLTFExporter.Skin | Add " + babylonBone.name + " as child to " + gltfParentNode.name, 3);
gltfParentNode.ChildrenList.Add(gltfNode.index);
gltfNode.parent = gltfParentNode;
}
else
{
// It's a root node
// Only root nodes are listed in a gltf scene
RaiseMessage("GLTFExporter.Skin | Add " + babylonBone.name + " as root node to scene", 3);
gltf.scenes[0].NodesList.Add(gltfNode.index);
}
// Transform
// Bones transform are exported through translation/rotation/scale (TRS) rather than matrix
// Because gltf node animation can only target TRS properties, not the matrix one
// Create matrix from array
var babylonMatrix = new BabylonMatrix();
babylonMatrix.m = babylonBone.matrix;
// Decompose matrix into TRS
var translationBabylon = new BabylonVector3();
var rotationQuatBabylon = new BabylonQuaternion();
var scaleBabylon = new BabylonVector3();
babylonMatrix.decompose(scaleBabylon, rotationQuatBabylon, translationBabylon);
// Store TRS values
gltfNode.translation = translationBabylon.ToArray();
gltfNode.rotation = rotationQuatBabylon.ToArray();
gltfNode.scale = scaleBabylon.ToArray();
// Animations
//ExportBoneAnimation(babylonBone, gltf, gltfNode);
return(gltfNode);
}
private void ExportAnimationGroups(GLTF gltf, BabylonScene babylonScene)
{
// Retreive and parse animation group data
var animationGroupList = babylonScene.animationGroups;
var animationGroupCount = animationGroupList == null ? 0 : animationGroupList.Count;
gltf.AnimationsList.Clear();
gltf.AnimationsList.Capacity = Math.Max(gltf.AnimationsList.Capacity, animationGroupCount);
if (animationGroupCount <= 0)
{
logger.RaiseMessage("GLTFExporter.Animation | No AnimationGroups: exporting all animations together.", 1);
GLTFAnimation gltfAnimation = new GLTFAnimation();
gltfAnimation.name = "All Animations";
int startFrame = babylonScene.TimelineStartFrame;
int endFrame = babylonScene.TimelineEndFrame;
foreach (var pair in nodeToGltfNodeMap)
{
BabylonNode node = pair.Key;
GLTFNode gltfNode = pair.Value;
bool nodeHasAnimations = node.animations != null && node.animations.Length > 0 && node.animations[0] != null;
bool nodeHasExtraAnimations = node.extraAnimations != null && node.extraAnimations.Count > 0 && node.extraAnimations[0] != null;
BabylonMesh meshNode = node as BabylonMesh;
BabylonMorphTargetManager morphTargetManager = null;
bool nodeHasAnimatedMorphTargets = false;
if (meshNode != null && meshNode.morphTargetManagerId != null)
{
morphTargetManager = GetBabylonMorphTargetManager(babylonScene, meshNode);
if (morphTargetManager != null)
{
nodeHasAnimatedMorphTargets = morphTargetManager.targets.Any(target => target.animations != null && target.animations.Length > 0 && target.animations[0] != null);
}
}
if (!nodeHasAnimations && !nodeHasExtraAnimations && !nodeHasAnimatedMorphTargets)
{
continue;
}
if (nodeHasAnimations && node.animations[0].property == "_matrix")
{
ExportBoneAnimation(gltfAnimation, startFrame, endFrame, gltf, node, pair.Value);
}
else
{
ExportNodeAnimation(gltfAnimation, startFrame, endFrame, gltf, node, gltfNode, babylonScene);
}
if (nodeHasAnimatedMorphTargets)
{
ExportMorphTargetWeightAnimation(morphTargetManager, gltf, gltfNode, gltfAnimation.ChannelList, gltfAnimation.SamplerList, startFrame, endFrame, babylonScene);
}
}
if (gltfAnimation.ChannelList.Count > 0)
{
gltf.AnimationsList.Add(gltfAnimation);
}
else
{
logger.RaiseMessage("GLTFExporter.Animation | No animation data for this animation, it is ignored.", 2);
}
}
else
{
foreach (BabylonAnimationGroup animGroup in animationGroupList)
{
logger.RaiseMessage("GLTFExporter.Animation | " + animGroup.name, 1);
GLTFAnimation gltfAnimation = new GLTFAnimation();
gltfAnimation.name = animGroup.name;
int startFrame = MathUtilities.RoundToInt(animGroup.from);
int endFrame = MathUtilities.RoundToInt(animGroup.to);
var uniqueNodeIds = animGroup.targetedAnimations.Select(targetAnim => targetAnim.targetId).Distinct();
foreach (var id in uniqueNodeIds)
{
BabylonNode babylonNode = babylonNodes.Find(node => node.id.Equals(id));
GLTFNode gltfNode = null;
// search the babylon scene id map for the babylon node that matches this id
if (babylonNode != null)
{
// search our babylon->gltf node mapping to see if this node is included in the exported gltf scene
if (!nodeToGltfNodeMap.TryGetValue(babylonNode, out gltfNode))
{
continue;
}
bool nodeHasAnimations = babylonNode.animations != null && babylonNode.animations.Length > 0 && babylonNode.animations[0] != null;
bool nodeHasExtraAnimations = babylonNode.extraAnimations != null && babylonNode.extraAnimations.Count > 0 && babylonNode.extraAnimations[0] != null;
if (!nodeHasAnimations && !nodeHasExtraAnimations)
{
continue;
}
if (nodeHasAnimations && babylonNode.animations[0].property == "_matrix") //TODO: Is this check accurate for deciphering between bones and nodes?
{
ExportBoneAnimation(gltfAnimation, startFrame, endFrame, gltf, babylonNode, gltfNode, animGroup);
}
else
{
ExportNodeAnimation(gltfAnimation, startFrame, endFrame, gltf, babylonNode, gltfNode, babylonScene, animGroup);
}
}
else
{
// if the node isn't found in the scene id map, check if it is the id for a morph target
BabylonMorphTargetManager morphTargetManager = babylonScene.morphTargetManagers.FirstOrDefault(mtm => mtm.targets.Any(target => target.animations != null && target.animations.Length > 0 && target.animations[0] != null));
if (morphTargetManager != null)
{
BabylonMesh mesh = morphTargetManager.sourceMesh;
if (mesh != null && nodeToGltfNodeMap.TryGetValue(mesh, out gltfNode))
{
ExportMorphTargetWeightAnimation(morphTargetManager, gltf, gltfNode, gltfAnimation.ChannelList, gltfAnimation.SamplerList, startFrame, endFrame, babylonScene);
}
}
}
}
if (gltfAnimation.ChannelList.Count > 0)
{
gltf.AnimationsList.Add(gltfAnimation);
}
else
{
logger.RaiseMessage("No data exported for this animation, it is ignored.", 2);
}
// clear the exported morph target cache, since we are exporting a new animation group. //TODO: we should probably do this more elegantly.
exportedMorphTargets.Clear();
}
}
}
private GLTFSkin ExportSkin(BabylonSkeleton babylonSkeleton, GLTF gltf, GLTFNode gltfNode)
{
RaiseMessage("GLTFExporter.Skin | Export skin of node '" + gltfNode.name + "' based on skeleton '" + babylonSkeleton.name + "'", 2);
// Retreive gltf skeleton data if babylon skeleton has already been exported
if (!alreadyExportedSkeletons.ContainsKey(babylonSkeleton))
{
alreadyExportedSkeletons.Add(babylonSkeleton, new BabylonSkeletonExportData());
// Switch coordinate system at object level
foreach (var babylonBone in babylonSkeleton.bones)
{
var boneLocalMatrix = new BabylonMatrix();
boneLocalMatrix.m = babylonBone.matrix;
var translationBabylon = new BabylonVector3();
var rotationQuatBabylon = new BabylonQuaternion();
var scale = new BabylonVector3();
boneLocalMatrix.decompose(scale, rotationQuatBabylon, translationBabylon);
translationBabylon *= scaleFactor;
translationBabylon.Z *= -1;
rotationQuatBabylon.X *= -1;
rotationQuatBabylon.Y *= -1;
boneLocalMatrix = BabylonMatrix.Compose(scale, rotationQuatBabylon, translationBabylon);
babylonBone.matrix = boneLocalMatrix.m;
}
}
var babylonSkeletonExportData = alreadyExportedSkeletons[babylonSkeleton];
// Skin
var nameSuffix = babylonSkeletonExportData.nb != 0 ? "_" + babylonSkeletonExportData.nb : "";
GLTFSkin gltfSkin = new GLTFSkin
{
name = babylonSkeleton.name + nameSuffix
};
gltfSkin.index = gltf.SkinsList.Count;
gltf.SkinsList.Add(gltfSkin);
babylonSkeletonExportData.nb++;
var bones = new List <BabylonBone>(babylonSkeleton.bones);
// Compute and store world matrix of each bone
var bonesWorldMatrices = new Dictionary <int, BabylonMatrix>();
foreach (var babylonBone in babylonSkeleton.bones)
{
if (!bonesWorldMatrices.ContainsKey(babylonBone.index))
{
BabylonMatrix boneWorldMatrix = _getBoneWorldMatrix(babylonBone, bones);
bonesWorldMatrices.Add(babylonBone.index, boneWorldMatrix);
}
}
// Buffer
var buffer = GLTFBufferService.Instance.GetBuffer(gltf);
// Accessor - InverseBindMatrices
var accessorInverseBindMatrices = GLTFBufferService.Instance.CreateAccessor(
gltf,
GLTFBufferService.Instance.GetBufferViewFloatMat4(gltf, buffer),
"accessorInverseBindMatrices",
GLTFAccessor.ComponentType.FLOAT,
GLTFAccessor.TypeEnum.MAT4
);
gltfSkin.inverseBindMatrices = accessorInverseBindMatrices.index;
// World matrix of the node
var nodeWorldMatrix = _getNodeWorldMatrix(gltfNode);
var gltfJoints = new List <int>();
foreach (var babylonBone in babylonSkeleton.bones)
{
GLTFNode gltfBoneNode = null;
if (!babylonSkeletonExportData.nodeByBone.ContainsKey(babylonBone))
{
// Export bone as a new node
gltfBoneNode = _exportBone(babylonBone, gltf, babylonSkeleton, bones);
babylonSkeletonExportData.nodeByBone.Add(babylonBone, gltfBoneNode);
}
gltfBoneNode = babylonSkeletonExportData.nodeByBone[babylonBone];
gltfJoints.Add(gltfBoneNode.index);
// Set this bone as skeleton if it is a root
// Meaning of 'skeleton' here is the top root bone
if (babylonBone.parentBoneIndex == -1)
{
gltfSkin.skeleton = gltfBoneNode.index;
}
// Compute inverseBindMatrice for this bone when attached to this node
var boneLocalMatrix = new BabylonMatrix();
boneLocalMatrix.m = babylonBone.matrix;
//printMatrix("boneLocalMatrix[" + babylonBone.name + "]", boneLocalMatrix);
BabylonMatrix boneWorldMatrix = null;
if (babylonBone.parentBoneIndex == -1)
{
boneWorldMatrix = boneLocalMatrix;
}
else
{
var parentWorldMatrix = bonesWorldMatrices[babylonBone.parentBoneIndex];
// Remove scale of parent
// This actually enable to take into account the scale of the bones, except for the root one
parentWorldMatrix = _removeScale(parentWorldMatrix);
boneWorldMatrix = boneLocalMatrix * parentWorldMatrix;
}
//printMatrix("boneWorldMatrix[" + babylonBone.name + "]", boneWorldMatrix);
var inverseBindMatrices = nodeWorldMatrix * BabylonMatrix.Invert(boneWorldMatrix);
// Populate accessor
List <float> matrix = new List <float>(inverseBindMatrices.m);
matrix.ForEach(n => accessorInverseBindMatrices.bytesList.AddRange(BitConverter.GetBytes(n)));
accessorInverseBindMatrices.count++;
}
gltfSkin.joints = gltfJoints.ToArray();
return(gltfSkin);
}
private void ExportBoneAnimation(GLTFAnimation gltfAnimation, int startFrame, int endFrame, GLTF gltf, BabylonNode babylonNode, GLTFNode gltfNode, BabylonAnimationGroup animationGroup = null)
{
var channelList = gltfAnimation.ChannelList;
var samplerList = gltfAnimation.SamplerList;
if (babylonNode.animations != null && babylonNode.animations[0].property == "_matrix")
{
logger.RaiseMessage("GLTFExporter.Animation | Export animation of bone named: " + babylonNode.name, 2);
BabylonAnimation babylonAnimation = null;
if (animationGroup != null)
{
var targetedAnimation = animationGroup.targetedAnimations.FirstOrDefault(animation => animation.targetId == babylonNode.id);
if (targetedAnimation != null)
{
babylonAnimation = targetedAnimation.animation;
}
}
// otherwise fall back to the full animation track on the node.
if (babylonAnimation == null)
{
babylonAnimation = babylonNode.animations[0];
}
var babylonAnimationKeysInRange = babylonAnimation.keys.Where(key => key.frame >= startFrame && key.frame <= endFrame);
if (babylonAnimationKeysInRange.Count() <= 0)
{
return;
}
// --- Input ---
var accessorInput = _createAndPopulateInput(gltf, babylonAnimation, startFrame, endFrame);
if (accessorInput == null)
{
return;
}
// --- Output ---
var paths = new string[] { "translation", "rotation", "scale" };
var accessorOutputByPath = new Dictionary <string, GLTFAccessor>();
foreach (string path in paths)
{
GLTFAccessor accessorOutput = _createAccessorOfPath(path, gltf);
accessorOutputByPath.Add(path, accessorOutput);
}
// Populate accessors
foreach (var babylonAnimationKey in babylonAnimationKeysInRange)
{
var matrix = new BabylonMatrix();
matrix.m = babylonAnimationKey.values;
var translationBabylon = new BabylonVector3();
var rotationQuatBabylon = new BabylonQuaternion();
var scaleBabylon = new BabylonVector3();
matrix.decompose(scaleBabylon, rotationQuatBabylon, translationBabylon);
// Switch coordinate system at object level
translationBabylon.Z *= -1;
rotationQuatBabylon.X *= -1;
rotationQuatBabylon.Y *= -1;
var outputValuesByPath = new Dictionary <string, float[]>();
outputValuesByPath.Add("translation", translationBabylon.ToArray());
outputValuesByPath.Add("rotation", rotationQuatBabylon.ToArray());
outputValuesByPath.Add("scale", scaleBabylon.ToArray());
// Store values as bytes
foreach (string path in paths)
{
var accessorOutput = accessorOutputByPath[path];
var outputValues = outputValuesByPath[path];
foreach (var outputValue in outputValues)
{
accessorOutput.bytesList.AddRange(BitConverter.GetBytes(outputValue));
}
accessorOutput.count++;
}
}
;
foreach (string path in paths)
{
var accessorOutput = accessorOutputByPath[path];
// Animation sampler
var gltfAnimationSampler = new GLTFAnimationSampler
{
input = accessorInput.index,
output = accessorOutput.index
};
gltfAnimationSampler.index = samplerList.Count;
samplerList.Add(gltfAnimationSampler);
// Target
var gltfTarget = new GLTFChannelTarget
{
node = gltfNode.index
};
gltfTarget.path = path;
// Channel
var gltfChannel = new GLTFChannel
{
sampler = gltfAnimationSampler.index,
target = gltfTarget
};
channelList.Add(gltfChannel);
}
}
ExportGLTFExtension(babylonNode, ref gltfAnimation, gltf);
}
private void ExportAnimationGroups(GLTF gltf, BabylonScene babylonScene)
{
// Retreive and parse animation group data
var animationGroupList = babylonScene.animationGroups;
var animationGroupCount = animationGroupList == null ? 0 : animationGroupList.Count;
gltf.AnimationsList.Clear();
gltf.AnimationsList.Capacity = Math.Max(gltf.AnimationsList.Capacity, animationGroupCount);
if (animationGroupCount <= 0)
{
logger.RaiseMessage("GLTFExporter.Animation | No AnimationGroups: exporting all animations together.", 1);
GLTFAnimation gltfAnimation = new GLTFAnimation();
gltfAnimation.name = "All Animations";
int minFrame = babylonScene.TimelineStartFrame;
int maxFrame = babylonScene.TimelineEndFrame;
foreach (var pair in nodeToGltfNodeMap)
{
ExportNodeAnimation(gltfAnimation, minFrame, maxFrame, gltf, pair.Key, pair.Value, babylonScene);
}
foreach (var pair in boneToGltfNodeMap)
{
ExportBoneAnimation(gltfAnimation, minFrame, maxFrame, gltf, pair.Key, pair.Value);
}
if (gltfAnimation.ChannelList.Count > 0)
{
gltf.AnimationsList.Add(gltfAnimation);
}
else
{
logger.RaiseMessage("GLTFExporter.Animation | No animation data for this animation, it is ignored.", 2);
}
}
else
{
foreach (BabylonAnimationGroup animGroup in animationGroupList)
{
logger.RaiseMessage("GLTFExporter.Animation | " + animGroup.name, 1);
GLTFAnimation gltfAnimation = new GLTFAnimation();
gltfAnimation.name = animGroup.name;
int startFrame = MathUtilities.RoundToInt(animGroup.from);
int endFrame = MathUtilities.RoundToInt(animGroup.to);
var uniqueNodeIds = animGroup.targetedAnimations.Select(targetAnim => targetAnim.targetId).Distinct();
foreach (var id in uniqueNodeIds)
{
BabylonNode babylonNode = babylonNodes.Find(node => node.id.Equals(id));
GLTFNode gltfNode;
if (babylonNode != null && nodeToGltfNodeMap.TryGetValue(babylonNode, out gltfNode))
{
ExportNodeAnimation(gltfAnimation, startFrame, endFrame, gltf, babylonNode, gltfNode, babylonScene);
}
// export all bones that match this id
foreach (KeyValuePair <BabylonBone, GLTFNode> pair in boneToGltfNodeMap)
{
if (pair.Key.id.Equals(id))
{
ExportBoneAnimation(gltfAnimation, startFrame, endFrame, gltf, pair.Key, pair.Value);
}
}
}
if (gltfAnimation.ChannelList.Count > 0)
{
gltf.AnimationsList.Add(gltfAnimation);
}
else
{
logger.RaiseMessage("No data exported for this animation, it is ignored.", 2);
}
}
}
}
public static GLTFAccessor _createAccessorOfProperty(string path, GLTF gltf)
{
var buffer = GLTFBufferService.Instance.GetBuffer(gltf);
GLTFAccessor accessorOutput = null;
switch (path.ToUpperInvariant())
{
case "WIPERANIMSTATE1":
case "WIPERANIMSTATE2":
case "WIPERANIMSTATE3":
case "WIPERANIMSTATE4":
accessorOutput = GLTFBufferService.Instance.CreateAccessor(
gltf,
GLTFBufferService.Instance.GetBufferViewAnimationFloatScalar(gltf, buffer),
$"accessorAnimation{path}",
GLTFAccessor.ComponentType.FLOAT,
GLTFAccessor.TypeEnum.SCALAR
);
break;
case "BASECOLOR":
accessorOutput = GLTFBufferService.Instance.CreateAccessor(
gltf,
GLTFBufferService.Instance.GetBufferViewAnimationFloatVec4(gltf, buffer),
"accessorAnimationBaseColor",
GLTFAccessor.ComponentType.FLOAT,
GLTFAccessor.TypeEnum.VEC4
);
break;
case "EMISSIVE":
accessorOutput = GLTFBufferService.Instance.CreateAccessor(
gltf,
GLTFBufferService.Instance.GetBufferViewAnimationFloatVec3(gltf, buffer),
"accessorAnimationEmissiveColor",
GLTFAccessor.ComponentType.FLOAT,
GLTFAccessor.TypeEnum.VEC3
);
break;
case "ROUGHNESS":
accessorOutput = GLTFBufferService.Instance.CreateAccessor(
gltf,
GLTFBufferService.Instance.GetBufferViewAnimationFloatScalar(gltf, buffer),
"accessorAnimationRoughnessFactor",
GLTFAccessor.ComponentType.FLOAT,
GLTFAccessor.TypeEnum.SCALAR
);
break;
case "METALLIC":
accessorOutput = GLTFBufferService.Instance.CreateAccessor(
gltf,
GLTFBufferService.Instance.GetBufferViewAnimationFloatScalar(gltf, buffer),
"accessorAnimationMetallicFactor",
GLTFAccessor.ComponentType.FLOAT,
GLTFAccessor.TypeEnum.SCALAR
);
break;
case "FOV":
accessorOutput = GLTFBufferService.Instance.CreateAccessor(
gltf,
GLTFBufferService.Instance.GetBufferViewAnimationFloatScalar(gltf, buffer),
"accessorAnimationFOV",
GLTFAccessor.ComponentType.FLOAT,
GLTFAccessor.TypeEnum.SCALAR
);
break;
case "UVOFFSETU":
case "UVOFFSETV":
accessorOutput = GLTFBufferService.Instance.CreateAccessor(
gltf,
GLTFBufferService.Instance.GetBufferViewAnimationFloatScalar(gltf, buffer),
"accessorAnimationUVOffset",
GLTFAccessor.ComponentType.FLOAT,
GLTFAccessor.TypeEnum.SCALAR
);
break;
case "UVTILINGU":
case "UVTILINGV":
accessorOutput = GLTFBufferService.Instance.CreateAccessor(
gltf,
GLTFBufferService.Instance.GetBufferViewAnimationFloatScalar(gltf, buffer),
"accessorAnimationUVTiling",
GLTFAccessor.ComponentType.FLOAT,
GLTFAccessor.TypeEnum.SCALAR
);
break;
case "UVROTATION":
accessorOutput = GLTFBufferService.Instance.CreateAccessor(
gltf,
GLTFBufferService.Instance.GetBufferViewAnimationFloatScalar(gltf, buffer),
"accessorAnimationUVRotation",
GLTFAccessor.ComponentType.FLOAT,
GLTFAccessor.TypeEnum.SCALAR
);
break;
}
return(accessorOutput);
}
private void ExportBoneAnimation(GLTFAnimation gltfAnimation, int startFrame, int endFrame, GLTF gltf, BabylonBone babylonBone, GLTFNode gltfNode)
{
var channelList = gltfAnimation.ChannelList;
var samplerList = gltfAnimation.SamplerList;
if (babylonBone.animation != null && babylonBone.animation.property == "_matrix")
{
logger.RaiseMessage("GLTFExporter.Animation | Export animation of bone named: " + babylonBone.name, 2);
var babylonAnimation = babylonBone.animation;
// --- Input ---
var accessorInput = _createAndPopulateInput(gltf, babylonAnimation, startFrame, endFrame);
if (accessorInput == null)
{
return;
}
// --- Output ---
var paths = new string[] { "translation", "rotation", "scale" };
var accessorOutputByPath = new Dictionary <string, GLTFAccessor>();
foreach (string path in paths)
{
GLTFAccessor accessorOutput = _createAccessorOfPath(path, gltf);
accessorOutputByPath.Add(path, accessorOutput);
}
// Populate accessors
foreach (var babylonAnimationKey in babylonAnimation.keys)
{
if (babylonAnimationKey.frame < startFrame)
{
continue;
}
if (babylonAnimationKey.frame > endFrame)
{
continue;
}
var matrix = new BabylonMatrix();
matrix.m = babylonAnimationKey.values;
var translationBabylon = new BabylonVector3();
var rotationQuatBabylon = new BabylonQuaternion();
var scaleBabylon = new BabylonVector3();
matrix.decompose(scaleBabylon, rotationQuatBabylon, translationBabylon);
// Switch coordinate system at object level
translationBabylon.Z *= -1;
translationBabylon *= exportParameters.scaleFactor;
rotationQuatBabylon.X *= -1;
rotationQuatBabylon.Y *= -1;
var outputValuesByPath = new Dictionary <string, float[]>();
outputValuesByPath.Add("translation", translationBabylon.ToArray());
outputValuesByPath.Add("rotation", rotationQuatBabylon.ToArray());
outputValuesByPath.Add("scale", scaleBabylon.ToArray());
// Store values as bytes
foreach (string path in paths)
{
var accessorOutput = accessorOutputByPath[path];
var outputValues = outputValuesByPath[path];
foreach (var outputValue in outputValues)
{
accessorOutput.bytesList.AddRange(BitConverter.GetBytes(outputValue));
}
accessorOutput.count++;
}
}
;
foreach (string path in paths)
{
var accessorOutput = accessorOutputByPath[path];
// Animation sampler
var gltfAnimationSampler = new GLTFAnimationSampler
{
input = accessorInput.index,
output = accessorOutput.index
};
gltfAnimationSampler.index = samplerList.Count;
samplerList.Add(gltfAnimationSampler);
// Target
var gltfTarget = new GLTFChannelTarget
{
node = gltfNode.index
};
gltfTarget.path = path;
// Channel
var gltfChannel = new GLTFChannel
{
sampler = gltfAnimationSampler.index,
target = gltfTarget
};
channelList.Add(gltfChannel);
}
}
}
private GLTFMesh ExportMesh(BabylonMesh babylonMesh, GLTF gltf, BabylonScene babylonScene)
{
RaiseMessage("GLTFExporter.Mesh | Export mesh named: " + babylonMesh.name, 1);
// --------------------------
// --- Mesh from babylon ----
// --------------------------
if (babylonMesh.positions == null || babylonMesh.positions.Length == 0)
{
RaiseMessage("GLTFExporter.Mesh | Mesh is a dummy", 2);
return(null);
}
RaiseMessage("GLTFExporter.Mesh | Mesh from babylon", 2);
// Retreive general data from babylon mesh
int nbVertices = babylonMesh.positions.Length / 3;
bool hasUV = babylonMesh.uvs != null && babylonMesh.uvs.Length > 0;
bool hasUV2 = babylonMesh.uvs2 != null && babylonMesh.uvs2.Length > 0;
bool hasColor = babylonMesh.colors != null && babylonMesh.colors.Length > 0;
bool hasBones = babylonMesh.matricesIndices != null && babylonMesh.matricesIndices.Length > 0;
bool hasBonesExtra = babylonMesh.matricesIndicesExtra != null && babylonMesh.matricesIndicesExtra.Length > 0;
bool hasTangents = babylonMesh.tangents != null && babylonMesh.tangents.Length > 0;
RaiseMessage("GLTFExporter.Mesh | nbVertices=" + nbVertices, 3);
RaiseMessage("GLTFExporter.Mesh | hasUV=" + hasUV, 3);
RaiseMessage("GLTFExporter.Mesh | hasUV2=" + hasUV2, 3);
RaiseMessage("GLTFExporter.Mesh | hasColor=" + hasColor, 3);
RaiseMessage("GLTFExporter.Mesh | hasBones=" + hasBones, 3);
RaiseMessage("GLTFExporter.Mesh | hasBonesExtra=" + hasBonesExtra, 3);
// Retreive vertices data from babylon mesh
List <GLTFGlobalVertex> globalVertices = new List <GLTFGlobalVertex>();
for (int indexVertex = 0; indexVertex < nbVertices; indexVertex++)
{
GLTFGlobalVertex globalVertex = new GLTFGlobalVertex();
globalVertex.Position = BabylonVector3.FromArray(babylonMesh.positions, indexVertex);
globalVertex.Normal = BabylonVector3.FromArray(babylonMesh.normals, indexVertex);
if (hasTangents)
{
globalVertex.Tangent = BabylonQuaternion.FromArray(babylonMesh.tangents, indexVertex);
// Switch coordinate system at object level
globalVertex.Tangent.Z *= -1;
// Invert W to switch to right handed system
globalVertex.Tangent.W *= -1;
}
// Switch coordinate system at object level
globalVertex.Position.Z *= -1;
globalVertex.Normal.Z *= -1;
globalVertex.Position *= scaleFactor;
if (hasUV)
{
globalVertex.UV = BabylonVector2.FromArray(babylonMesh.uvs, indexVertex);
// For glTF, the origin of the UV coordinates (0, 0) corresponds to the upper left corner of a texture image
// While for Babylon, it corresponds to the lower left corner of a texture image
globalVertex.UV.Y = 1 - globalVertex.UV.Y;
}
if (hasUV2)
{
globalVertex.UV2 = BabylonVector2.FromArray(babylonMesh.uvs2, indexVertex);
// For glTF, the origin of the UV coordinates (0, 0) corresponds to the upper left corner of a texture image
// While for Babylon, it corresponds to the lower left corner of a texture image
globalVertex.UV2.Y = 1 - globalVertex.UV2.Y;
}
if (hasColor)
{
globalVertex.Color = Tools.SubArrayFromEntity(babylonMesh.colors, indexVertex, 4);
}
if (hasBones)
{
// In babylon, the 4 bones indices are stored in a single int
// Each bone index is 8-bit offset from the next
int bonesIndicesMerged = babylonMesh.matricesIndices[indexVertex];
int bone3 = bonesIndicesMerged >> 24;
bonesIndicesMerged -= bone3 << 24;
int bone2 = bonesIndicesMerged >> 16;
bonesIndicesMerged -= bone2 << 16;
int bone1 = bonesIndicesMerged >> 8;
bonesIndicesMerged -= bone1 << 8;
int bone0 = bonesIndicesMerged >> 0;
bonesIndicesMerged -= bone0 << 0;
var bonesIndicesArray = new ushort[] { (ushort)bone0, (ushort)bone1, (ushort)bone2, (ushort)bone3 };
globalVertex.BonesIndices = bonesIndicesArray;
globalVertex.BonesWeights = Tools.SubArrayFromEntity(babylonMesh.matricesWeights, indexVertex, 4);
}
globalVertices.Add(globalVertex);
}
var babylonMorphTargetManager = GetBabylonMorphTargetManager(babylonScene, babylonMesh);
// Retreive indices from babylon mesh
List <int> babylonIndices = babylonMesh.indices.ToList();
// --------------------------
// ------- Init glTF --------
// --------------------------
RaiseMessage("GLTFExporter.Mesh | Init glTF", 2);
// Mesh
var gltfMesh = new GLTFMesh {
name = babylonMesh.name
};
gltfMesh.index = gltf.MeshesList.Count;
gltf.MeshesList.Add(gltfMesh);
gltfMesh.idGroupInstance = babylonMesh.idGroupInstance;
if (hasBones)
{
gltfMesh.idBabylonSkeleton = babylonMesh.skeletonId;
}
// --------------------------
// ---- glTF primitives -----
// --------------------------
RaiseMessage("GLTFExporter.Mesh | glTF primitives", 2);
var meshPrimitives = new List <GLTFMeshPrimitive>();
foreach (BabylonSubMesh babylonSubMesh in babylonMesh.subMeshes)
{
// --------------------------
// ------ SubMesh data ------
// --------------------------
List <GLTFGlobalVertex> globalVerticesSubMesh = globalVertices.GetRange(babylonSubMesh.verticesStart, babylonSubMesh.verticesCount);
var gltfIndices = babylonIndices.GetRange(babylonSubMesh.indexStart, babylonSubMesh.indexCount);
// In gltf, indices of each mesh primitive are 0-based (ie: min value is 0)
// Thus, the gltf indices list is a concatenation of sub lists all 0-based
// Example for 2 triangles, each being a submesh:
// babylonIndices = {0,1,2, 3,4,5} gives as result gltfIndicies = {0,1,2, 0,1,2}
var minIndiceValue = gltfIndices.Min(); // Should be equal to babylonSubMesh.indexStart
for (int indexIndice = 0; indexIndice < gltfIndices.Count; indexIndice++)
{
gltfIndices[indexIndice] -= minIndiceValue;
}
// --------------------------
// ----- Mesh primitive -----
// --------------------------
// MeshPrimitive
var meshPrimitive = new GLTFMeshPrimitive
{
attributes = new Dictionary <string, int>()
};
meshPrimitives.Add(meshPrimitive);
// Material
if (babylonMesh.materialId != null)
{
RaiseMessage("GLTFExporter.Mesh | Material", 3);
// Retreive the babylon material
BabylonMaterial babylonMaterial;
var babylonMaterialId = babylonMesh.materialId;
// From multi materials first, if any
// Loop recursively even though it shouldn't be a real use case
var babylonMultiMaterials = new List <BabylonMultiMaterial>(babylonScene.multiMaterials);
BabylonMultiMaterial babylonMultiMaterial;
do
{
babylonMultiMaterial = babylonMultiMaterials.Find(_babylonMultiMaterial => _babylonMultiMaterial.id == babylonMaterialId);
if (babylonMultiMaterial != null)
{
babylonMaterialId = babylonMultiMaterial.materials[babylonSubMesh.materialIndex];
}
}while (babylonMultiMaterial != null);
// Then from materials
var babylonMaterials = new List <BabylonMaterial>(babylonScene.materials);
babylonMaterial = babylonMaterials.Find(_babylonMaterial => _babylonMaterial.id == babylonMaterialId);
// If babylon material was exported successfully
if (babylonMaterial != null)
{
// Update primitive material index
var indexMaterial = babylonMaterialsToExport.FindIndex(_babylonMaterial => _babylonMaterial == babylonMaterial);
if (indexMaterial == -1)
{
// Store material for exportation
indexMaterial = babylonMaterialsToExport.Count;
babylonMaterialsToExport.Add(babylonMaterial);
}
meshPrimitive.material = indexMaterial;
}
// TODO - Add and retreive info from babylon material
meshPrimitive.mode = GLTFMeshPrimitive.FillMode.TRIANGLES;
}
// --------------------------
// ------- Accessors --------
// --------------------------
RaiseMessage("GLTFExporter.Mesh | Geometry", 3);
// Buffer
var buffer = GLTFBufferService.Instance.GetBuffer(gltf);
// --- Indices ---
var componentType = GLTFAccessor.ComponentType.UNSIGNED_SHORT;
if (nbVertices >= 65536)
{
componentType = GLTFAccessor.ComponentType.UNSIGNED_INT;
}
var accessorIndices = GLTFBufferService.Instance.CreateAccessor(
gltf,
GLTFBufferService.Instance.GetBufferViewScalar(gltf, buffer),
"accessorIndices",
componentType,
GLTFAccessor.TypeEnum.SCALAR
);
meshPrimitive.indices = accessorIndices.index;
// Populate accessor
if (componentType == GLTFAccessor.ComponentType.UNSIGNED_INT)
{
gltfIndices.ForEach(n => accessorIndices.bytesList.AddRange(BitConverter.GetBytes(n)));
}
else
{
var gltfIndicesShort = gltfIndices.ConvertAll(new Converter <int, ushort>(n => (ushort)n));
gltfIndicesShort.ForEach(n => accessorIndices.bytesList.AddRange(BitConverter.GetBytes(n)));
}
accessorIndices.count = gltfIndices.Count;
// --- Positions ---
var accessorPositions = GLTFBufferService.Instance.CreateAccessor(
gltf,
GLTFBufferService.Instance.GetBufferViewFloatVec3(gltf, buffer),
"accessorPositions",
GLTFAccessor.ComponentType.FLOAT,
GLTFAccessor.TypeEnum.VEC3
);
meshPrimitive.attributes.Add(GLTFMeshPrimitive.Attribute.POSITION.ToString(), accessorPositions.index);
// Populate accessor
accessorPositions.min = new float[] { float.MaxValue, float.MaxValue, float.MaxValue };
accessorPositions.max = new float[] { float.MinValue, float.MinValue, float.MinValue };
globalVerticesSubMesh.ForEach((globalVertex) =>
{
var positions = globalVertex.Position.ToArray();
// Store values as bytes
foreach (var position in positions)
{
accessorPositions.bytesList.AddRange(BitConverter.GetBytes(position));
}
// Update min and max values
GLTFBufferService.UpdateMinMaxAccessor(accessorPositions, positions);
});
accessorPositions.count = globalVerticesSubMesh.Count;
// --- Tangents ---
if (hasTangents)
{
var accessorTangents = GLTFBufferService.Instance.CreateAccessor(
gltf,
GLTFBufferService.Instance.GetBufferViewFloatVec4(gltf, buffer),
"accessorTangents",
GLTFAccessor.ComponentType.FLOAT,
GLTFAccessor.TypeEnum.VEC4
);
meshPrimitive.attributes.Add(GLTFMeshPrimitive.Attribute.TANGENT.ToString(), accessorTangents.index);
// Populate accessor
List <float> tangents = globalVerticesSubMesh.SelectMany(v => v.Tangent.ToArray()).ToList();
tangents.ForEach(n => accessorTangents.bytesList.AddRange(BitConverter.GetBytes(n)));
accessorTangents.count = globalVerticesSubMesh.Count;
}
// --- Normals ---
var accessorNormals = GLTFBufferService.Instance.CreateAccessor(
gltf,
GLTFBufferService.Instance.GetBufferViewFloatVec3(gltf, buffer),
"accessorNormals",
GLTFAccessor.ComponentType.FLOAT,
GLTFAccessor.TypeEnum.VEC3
);
meshPrimitive.attributes.Add(GLTFMeshPrimitive.Attribute.NORMAL.ToString(), accessorNormals.index);
// Populate accessor
List <float> normals = globalVerticesSubMesh.SelectMany(v => v.Normal.ToArray()).ToList();
normals.ForEach(n => accessorNormals.bytesList.AddRange(BitConverter.GetBytes(n)));
accessorNormals.count = globalVerticesSubMesh.Count;
// --- Colors ---
if (hasColor)
{
var accessorColors = GLTFBufferService.Instance.CreateAccessor(
gltf,
GLTFBufferService.Instance.GetBufferViewFloatVec4(gltf, buffer),
"accessorColors",
GLTFAccessor.ComponentType.FLOAT,
GLTFAccessor.TypeEnum.VEC4
);
meshPrimitive.attributes.Add(GLTFMeshPrimitive.Attribute.COLOR_0.ToString(), accessorColors.index);
// Populate accessor
List <float> colors = globalVerticesSubMesh.SelectMany(v => new[] { v.Color[0], v.Color[1], v.Color[2], v.Color[3] }).ToList();
colors.ForEach(n => accessorColors.bytesList.AddRange(BitConverter.GetBytes(n)));
accessorColors.count = globalVerticesSubMesh.Count;
}
// --- UV ---
if (hasUV)
{
var accessorUVs = GLTFBufferService.Instance.CreateAccessor(
gltf,
GLTFBufferService.Instance.GetBufferViewFloatVec2(gltf, buffer),
"accessorUVs",
GLTFAccessor.ComponentType.FLOAT,
GLTFAccessor.TypeEnum.VEC2
);
meshPrimitive.attributes.Add(GLTFMeshPrimitive.Attribute.TEXCOORD_0.ToString(), accessorUVs.index);
// Populate accessor
List <float> uvs = globalVerticesSubMesh.SelectMany(v => v.UV.ToArray()).ToList();
uvs.ForEach(n => accessorUVs.bytesList.AddRange(BitConverter.GetBytes(n)));
accessorUVs.count = globalVerticesSubMesh.Count;
}
// --- UV2 ---
if (hasUV2)
{
var accessorUV2s = GLTFBufferService.Instance.CreateAccessor(
gltf,
GLTFBufferService.Instance.GetBufferViewFloatVec2(gltf, buffer),
"accessorUV2s",
GLTFAccessor.ComponentType.FLOAT,
GLTFAccessor.TypeEnum.VEC2
);
meshPrimitive.attributes.Add(GLTFMeshPrimitive.Attribute.TEXCOORD_1.ToString(), accessorUV2s.index);
// Populate accessor
List <float> uvs2 = globalVerticesSubMesh.SelectMany(v => v.UV2.ToArray()).ToList();
uvs2.ForEach(n => accessorUV2s.bytesList.AddRange(BitConverter.GetBytes(n)));
accessorUV2s.count = globalVerticesSubMesh.Count;
}
// --- Bones ---
if (hasBones)
{
RaiseMessage("GLTFExporter.Mesh | Bones", 3);
// --- Joints ---
var accessorJoints = GLTFBufferService.Instance.CreateAccessor(
gltf,
GLTFBufferService.Instance.GetBufferViewUnsignedShortVec4(gltf, buffer),
"accessorJoints",
GLTFAccessor.ComponentType.UNSIGNED_SHORT,
GLTFAccessor.TypeEnum.VEC4
);
meshPrimitive.attributes.Add(GLTFMeshPrimitive.Attribute.JOINTS_0.ToString(), accessorJoints.index);
// Populate accessor
List <ushort> joints = globalVerticesSubMesh.SelectMany(v => new[] { v.BonesIndices[0], v.BonesIndices[1], v.BonesIndices[2], v.BonesIndices[3] }).ToList();
joints.ForEach(n => accessorJoints.bytesList.AddRange(BitConverter.GetBytes(n)));
accessorJoints.count = globalVerticesSubMesh.Count;
// --- Weights ---
var accessorWeights = GLTFBufferService.Instance.CreateAccessor(
gltf,
GLTFBufferService.Instance.GetBufferViewFloatVec4(gltf, buffer),
"accessorWeights",
GLTFAccessor.ComponentType.FLOAT,
GLTFAccessor.TypeEnum.VEC4
);
meshPrimitive.attributes.Add(GLTFMeshPrimitive.Attribute.WEIGHTS_0.ToString(), accessorWeights.index);
// Populate accessor
List <float> weightBones = globalVerticesSubMesh.SelectMany(v => new[] { v.BonesWeights[0], v.BonesWeights[1], v.BonesWeights[2], v.BonesWeights[3] }).ToList();
weightBones.ForEach(n => accessorWeights.bytesList.AddRange(BitConverter.GetBytes(n)));
accessorWeights.count = globalVerticesSubMesh.Count;
}
// Morph targets positions and normals
if (babylonMorphTargetManager != null)
{
RaiseMessage("GLTFExporter.Mesh | Morph targets", 3);
_exportMorphTargets(babylonMesh, babylonSubMesh, babylonMorphTargetManager, gltf, buffer, meshPrimitive);
}
}
gltfMesh.primitives = meshPrimitives.ToArray();
// Morph targets weights
if (babylonMorphTargetManager != null)
{
var weights = new List <float>();
foreach (BabylonMorphTarget babylonMorphTarget in babylonMorphTargetManager.targets)
{
weights.Add(babylonMorphTarget.influence);
}
gltfMesh.weights = weights.ToArray();
}
return(gltfMesh);
}
private void ExportAnimationGroups(GLTF gltf, BabylonScene babylonScene)
{
// Retreive and parse animation group data
AnimationGroupList animationList = InitAnimationGroups();
gltf.AnimationsList.Clear();
gltf.AnimationsList.Capacity = Math.Max(gltf.AnimationsList.Capacity, animationList.Count);
if (animationList.Count <= 0)
{
RaiseMessage("GLTFExporter.Animation | No AnimationGroups: exporting all animations together.", 1);
GLTFAnimation gltfAnimation = new GLTFAnimation();
gltfAnimation.name = "All Animations";
int minFrame = Loader.Core.AnimRange.Start / Loader.Global.TicksPerFrame;
int maxFrame = Loader.Core.AnimRange.End / Loader.Global.TicksPerFrame;
foreach (var pair in nodeToGltfNodeMap)
{
ExportNodeAnimation(gltfAnimation, minFrame, maxFrame, gltf, pair.Key, pair.Value, babylonScene);
}
foreach (var pair in boneToGltfNodeMap)
{
ExportBoneAnimation(gltfAnimation, minFrame, maxFrame, gltf, pair.Key, pair.Value);
}
if (gltfAnimation.ChannelList.Count > 0)
{
gltf.AnimationsList.Add(gltfAnimation);
}
else
{
RaiseMessage("GLTFExporter.Animation | No animation data for this animation, it is ignored.", 2);
}
}
else
{
foreach (AnimationGroup animGroup in animationList)
{
RaiseMessage("GLTFExporter.Animation | " + animGroup.Name, 1);
GLTFAnimation gltfAnimation = new GLTFAnimation();
gltfAnimation.name = animGroup.Name;
int startFrame = animGroup.FrameStart;
int endFrame = animGroup.FrameEnd;
foreach (uint nodeHandle in animGroup.NodeHandles)
{
// todo: make something a little more efficient..
IINode maxNode = Loader.Core.RootNode.FindChildNode(nodeHandle);
// node could have been deleted, silently ignore it
if (maxNode == null)
{
continue;
}
string id = maxNode.GetGuid().ToString();
BabylonNode babylonNode = babylonNodes.Find(node => node.id.Equals(id));
GLTFNode gltfNode;
if (babylonNode != null && nodeToGltfNodeMap.TryGetValue(babylonNode, out gltfNode))
{
ExportNodeAnimation(gltfAnimation, startFrame, endFrame, gltf, babylonNode, gltfNode, babylonScene);
}
// export all bones that match this id
foreach (KeyValuePair <BabylonBone, GLTFNode> pair in boneToGltfNodeMap)
{
if (pair.Key.id.Equals(id))
{
ExportBoneAnimation(gltfAnimation, startFrame, endFrame, gltf, pair.Key, pair.Value);
}
}
}
if (gltfAnimation.ChannelList.Count > 0)
{
gltf.AnimationsList.Add(gltfAnimation);
}
else
{
RaiseMessage("No data exported for this animation, it is ignored.", 2);
}
}
}
}
