private void exportNodeRec(BabylonNode babylonNode, GLTF gltf, BabylonScene babylonScene, GLTFNode gltfParentNode = null)
{
GLTFNode gltfNode = null;
var type = babylonNode.GetType();
if (type == typeof(BabylonAbstractMesh) ||
type.IsSubclassOf(typeof(BabylonAbstractMesh)))
{
gltfNode = ExportAbstractMesh(babylonNode as BabylonAbstractMesh, gltf, gltfParentNode, babylonScene);
}
else if (type == typeof(BabylonCamera))
{
GLTFCamera gltfCamera = ExportCamera(babylonNode as BabylonCamera, gltf, gltfParentNode);
gltfNode = gltfCamera.gltfNode;
}
else if (type == typeof(BabylonLight))
{
if (isNodeRelevantToExport(babylonNode))
{
// Export light nodes as empty nodes (no lights in glTF 2.0 core)
RaiseWarning($"GLTFExporter | Light named {babylonNode.name} has children but lights are not exported with glTF 2.0 core version. An empty node is used instead.", 1);
gltfNode = ExportLight(babylonNode as BabylonLight, gltf, gltfParentNode);
}
else
{
RaiseMessage($"GLTFExporter | Light named {babylonNode.name} is not relevant to export", 1);
}
}
else
{
RaiseError($"Node named {babylonNode.name} as no exporter", 1);
}
CheckCancelled();
// If node is exported successfully...
if (gltfNode != null)
{
// ...export its children
List <BabylonNode> babylonDescendants = getDescendants(babylonNode);
babylonDescendants.ForEach(descendant => exportNodeRec(descendant, gltf, babylonScene, gltfNode));
}
}
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 bool ExportMorphTargetWeightAnimation(BabylonMorphTargetManager babylonMorphTargetManager, GLTF gltf, GLTFNode gltfNode, List <GLTFChannel> channelList, List <GLTFAnimationSampler> samplerList, int startFrame, int endFrame)
{
if (!_isBabylonMorphTargetManagerAnimationValid(babylonMorphTargetManager))
{
return(false);
}
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)Loader.Global.FrameRate;
// 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 void exportNodeRec(BabylonNode babylonNode, GLTF gltf, BabylonScene babylonScene, GLTFNode gltfParentNode = null)
{
GLTFNode gltfNode = null;
if (babylonNode.GetType() == typeof(BabylonMesh))
{
GLTFMesh gltfMesh = ExportMesh(babylonNode as BabylonMesh, gltf, gltfParentNode);
if (gltfMesh != null)
{
gltfNode = gltfMesh.gltfNode;
}
}
else if (babylonNode.GetType() == typeof(BabylonCamera))
{
// TODO - Export camera nodes
RaiseError($"TODO - Export camera node named {babylonNode.name}", 1);
}
else if (babylonNode.GetType() == typeof(BabylonLight))
{
// TODO - Export light nodes as empty nodes (no lights in glTF 2.0 core)
RaiseError($"TODO - Export light node named {babylonNode.name}", 1);
RaiseWarning($"GLTFExporter.Node | Light named {babylonNode.name} has children but lights are not exported with glTF 2.0 core version. An empty node is used instead.", 1);
}
else
{
RaiseError($"Node named {babylonNode.name} as no exporter", 1);
}
CheckCancelled();
// If parent is exported successfully...
if (gltfNode != null)
{
// ...export its children
List <BabylonNode> babylonDescendants = getDescendants(babylonNode, babylonScene);
babylonDescendants.ForEach(descendant => exportNodeRec(descendant, gltf, babylonScene, gltfNode));
}
}
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 = Loader.Core.RootNode.GetBoolProperty("babylonjs_animgroup_exportnonanimated");
// 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);
// Optimize animations to only keep ones animated between start and end frames
var optimizeAnimations = !Loader.Core.RootNode.GetBoolProperty("babylonjs_donotoptimizeanimations"); // reverse negation for clarity
if (optimizeAnimations)
{
List <BabylonAnimation> babylonAnimationsOptimized = new List <BabylonAnimation>();
foreach (BabylonAnimation babylonAnimation in babylonAnimations)
{
// Filter animation keys to only keep frames between start and end
List <BabylonAnimationKey> keysInRangeFull = babylonAnimation.keysFull.FindAll(babylonAnimationKey => babylonAnimationKey.frame >= startFrame && babylonAnimationKey.frame <= endFrame);
// Optimization process always keeps first and last frames
OptimizeAnimations(keysInRangeFull, true);
if (IsAnimationKeysRelevant(keysInRangeFull))
{
// Override animation keys
babylonAnimation.keys = keysInRangeFull.ToArray();
babylonAnimationsOptimized.Add(babylonAnimation);
}
}
// From now, use optimized animations instead
babylonAnimations = babylonAnimationsOptimized;
}
if (babylonAnimations.Count > 0 || exportNonAnimated)
{
if (babylonAnimations.Count > 0)
{
RaiseMessage("GLTFExporter.Animation | Export animations of node named: " + babylonNode.name, 2);
}
else if (exportNonAnimated)
{
RaiseMessage("GLTFExporter.Animation | Export dummy animation for node named: " + babylonNode.name, 2);
// Export a dummy animation
babylonAnimations.Add(GetDummyAnimation(gltfNode, startFrame, endFrame));
}
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;
}
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);
}
}
}
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")
{
RaiseMessage("GLTFExporter.Animation | Export animation of bone named: " + babylonBone.name, 2);
var babylonAnimation = babylonBone.animation;
// Optimize animation
var optimizeAnimations = !Loader.Core.RootNode.GetBoolProperty("babylonjs_donotoptimizeanimations"); // reverse negation for clarity
if (optimizeAnimations)
{
// Filter animation keys to only keep frames between start and end
List <BabylonAnimationKey> keysInRangeFull = babylonAnimation.keysFull.FindAll(babylonAnimationKey => babylonAnimationKey.frame >= startFrame && babylonAnimationKey.frame <= endFrame);
// Optimization process always keeps first and last frames
OptimizeAnimations(keysInRangeFull, false);
if (IsAnimationKeysRelevant(keysInRangeFull))
{
// From now, use optimized animation instead
// Override animation keys
babylonAnimation.keys = keysInRangeFull.ToArray();
}
}
// --- 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);
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);
}
}
}
/// <summary>
/// Create a gltf node from the babylon node.
/// </summary>
/// <param name="babylonNode"></param>
/// <param name="gltf"></param>
/// <param name="babylonScene"></param>
/// <param name="gltfParentNode">The parent of the glTF node that will be created.</param>
/// <returns>The gltf node created.</returns>
private GLTFNode ExportNode(BabylonNode babylonNode, GLTF gltf, BabylonScene babylonScene, GLTFNode gltfParentNode)
{
logger.RaiseMessage($"GLTFExporter | ExportNode {babylonNode.name}", 1);
GLTFNode gltfNode = null;
var type = babylonNode.GetType();
var nodeNodePair = nodeToGltfNodeMap.FirstOrDefault(pair => pair.Key.id.Equals(babylonNode.id));
if (nodeNodePair.Key != null)
{
return(nodeNodePair.Value);
}
// Node
gltfNode = new GLTFNode
{
name = GetUniqueNodeName(babylonNode.name),
index = gltf.NodesList.Count
};
// User Custom Attributes
if (babylonNode.metadata != null && babylonNode.metadata.Count != 0)
{
gltfNode.extras = babylonNode.metadata;
}
gltf.NodesList.Add(gltfNode); // add the node to the gltf list
nodeToGltfNodeMap.Add(babylonNode, gltfNode); // add the node to the global map
// Hierarchy
if (gltfParentNode != null)
{
logger.RaiseMessage("GLTFExporter.Node| Add " + babylonNode.name + " as child to " + gltfParentNode.name, 2);
gltfParentNode.ChildrenList.Add(gltfNode.index);
gltfNode.parent = gltfParentNode;
}
else
{
// It's a root node
// Only root nodes are listed in a gltf scene
logger.RaiseMessage("GLTFExporter.Node | Add " + babylonNode.name + " as root node to scene", 2);
gltf.scenes[0].NodesList.Add(gltfNode.index);
}
// TRS
if (exportParameters.exportAnimationsOnly == false)
{
// Position
gltfNode.translation = babylonNode.position;
// Rotation
if (babylonNode.rotationQuaternion != null)
{
gltfNode.rotation = babylonNode.rotationQuaternion;
}
else
{
// Convert rotation vector to quaternion
BabylonVector3 rotationVector3 = new BabylonVector3
{
X = babylonNode.rotation[0],
Y = babylonNode.rotation[1],
Z = babylonNode.rotation[2]
};
gltfNode.rotation = rotationVector3.toQuaternion().ToArray();
}
// Scale
gltfNode.scale = babylonNode.scaling;
// Switch coordinate system at object level
gltfNode.translation[2] *= -1;
gltfNode.translation[0] *= exportParameters.scaleFactor;
gltfNode.translation[1] *= exportParameters.scaleFactor;
gltfNode.translation[2] *= exportParameters.scaleFactor;
gltfNode.rotation[0] *= -1;
gltfNode.rotation[1] *= -1;
}
ExportGLTFExtension(babylonNode, ref gltfNode, gltf);
return(gltfNode);
}
private GLTFNode ExportAbstractMesh(ref GLTFNode gltfNode, BabylonAbstractMesh babylonAbstractMesh, GLTF gltf, GLTFNode gltfParentNode, BabylonScene babylonScene)
{
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);
gltfNode.skin = gltfSkin.index;
}
}
return(gltfNode);
}
private void exportNodeRec(BabylonNode babylonNode, GLTF gltf, BabylonScene babylonScene, GLTFNode gltfParentNode = null)
{
GLTFNode gltfNode = ExportNode(babylonNode, gltf, babylonScene, gltfParentNode);
if (gltfNode != null)
{
logger.CheckCancelled();
// export its tag
if (!string.IsNullOrEmpty(babylonNode.tags))
{
if (gltfNode.extras == null)
{
gltfNode.extras = new Dictionary <string, object>();
}
gltfNode.extras["tags"] = babylonNode.tags;
}
// ...export its children
List <BabylonNode> babylonDescendants = getDescendants(babylonNode);
babylonDescendants.ForEach(descendant => exportNodeRec(descendant, gltf, babylonScene, gltfNode));
}
}
private void exportNodeTypeRec(BabylonNode babylonNode, GLTF gltf, BabylonScene babylonScene, GLTFNode gltfParentNode = null)
{
var type = babylonNode.GetType();
logger.RaiseMessage($"GLTFExporter | ExportNode {babylonNode.name} of Type {type.ToString()}", 1);
var nodeNodePair = nodeToGltfNodeMap.FirstOrDefault(pair => pair.Key.id.Equals(babylonNode.id));
GLTFNode gltfNode = nodeNodePair.Value;
if (gltfNode != null)
{
if (type == typeof(BabylonAbstractMesh) || type.IsSubclassOf(typeof(BabylonAbstractMesh)))
{
gltfNode = ExportAbstractMesh(ref gltfNode, babylonNode as BabylonAbstractMesh, gltf, gltfParentNode, babylonScene);
}
else if (type == typeof(BabylonCamera))
{
GLTFCamera gltfCamera = ExportCamera(ref gltfNode, babylonNode as BabylonCamera, gltf, gltfParentNode);
}
else if (type == typeof(BabylonLight) || type.IsSubclassOf(typeof(BabylonLight)))
{
if (((BabylonLight)babylonNode).type != 3)
{
ExportLight(ref gltfNode, babylonNode as BabylonLight, gltf, gltfParentNode, babylonScene);
}
}
else if (type == typeof(BabylonNode))
{
logger.RaiseVerbose($"Node named {babylonNode.name} already exported as gltfNode", 1);
}
else
{
logger.RaiseError($"Node named {babylonNode.name} has no exporter", 1);
}
logger.CheckCancelled();
// ...export its children
List <BabylonNode> babylonDescendants = getDescendants(babylonNode);
babylonDescendants.ForEach(descendant => exportNodeTypeRec(descendant, gltf, babylonScene, gltfNode));
}
}
private GLTFNode ExportLight(ref GLTFNode gltfNode, BabylonLight babylonLight, GLTF gltf, GLTFNode gltfParentNode, BabylonScene babylonScene)
{
// Custom user properties
if (babylonLight.metadata != null && babylonLight.metadata.Count != 0)
{
gltfNode.extras = babylonLight.metadata;
}
if (exportParameters.enableKHRLightsPunctual)
{
if (babylonLight.type == 3) // ambient light
{
logger?.RaiseMessage($"GLTFExporter.Light | Ambient light {babylonLight.name} is not supported in KHR_lights_punctual.");
}
else
{
logger?.RaiseMessage("GLTFExporter.Light | Export light named: " + babylonLight.name, 2);
// new light in the node extensions
GLTFLight light = new GLTFLight
{
light = AddLightExtension(ref gltf, babylonLight)
};
if (gltfNode.extensions == null)
{
gltfNode.extensions = new GLTFExtensions();
}
gltfNode.extensions[KHR_lights_punctuals] = light;
}
}
ExportGLTFExtension(babylonLight, ref gltfNode, gltf);
return(gltfNode);
}
/// <summary>
/// Create a gltf node from the babylon node.
/// </summary>
/// <param name="babylonNode"></param>
/// <param name="gltf"></param>
/// <param name="babylonScene"></param>
/// <param name="gltfParentNode">The parent of the glTF node that will be created.</param>
/// <returns>The gltf node created.</returns>
private GLTFNode ExportNode(BabylonNode babylonNode, GLTF gltf, BabylonScene babylonScene, GLTFNode gltfParentNode)
{
RaiseMessage($"GLTFExporter | ExportNode {babylonNode.name}", 1);
GLTFNode gltfNode = null;
var type = babylonNode.GetType();
var nodeNodePair = nodeToGltfNodeMap.FirstOrDefault(pair => pair.Key.id.Equals(babylonNode.id));
if (nodeNodePair.Key != null)
{
return(nodeNodePair.Value);
}
var boneNodePair = boneToGltfNodeMap.FirstOrDefault(pair => pair.Key.id.Equals(babylonNode.id));
if (boneNodePair.Key != null)
{
return(boneNodePair.Value);
}
// Node
gltfNode = new GLTFNode
{
name = GetUniqueNodeName(babylonNode.name),
index = gltf.NodesList.Count
};
gltf.NodesList.Add(gltfNode); // add the node to the gltf list
nodeToGltfNodeMap.Add(babylonNode, gltfNode); // add the node to the global map
// Hierarchy
if (gltfParentNode != null)
{
RaiseMessage("GLTFExporter.Node| Add " + babylonNode.name + " as child to " + gltfParentNode.name, 2);
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.Node | Add " + babylonNode.name + " as root node to scene", 2);
gltf.scenes[0].NodesList.Add(gltfNode.index);
}
// Transform
// Position
gltfNode.translation = babylonNode.position;
// Rotation
if (type == typeof(BabylonAbstractMesh) || type.IsSubclassOf(typeof(BabylonAbstractMesh)) || type == typeof(BabylonCamera))
{
if (babylonNode.rotationQuaternion != null)
{
gltfNode.rotation = babylonNode.rotationQuaternion;
}
else
{
// Convert rotation vector to quaternion
BabylonVector3 rotationVector3 = new BabylonVector3
{
X = babylonNode.rotation[0],
Y = babylonNode.rotation[1],
Z = babylonNode.rotation[2]
};
gltfNode.rotation = rotationVector3.toQuaternion().ToArray();
}
}
else // Light
{
gltfNode.rotation = new float[4] {
0, 0, 0, 1
};
}
// Scale
if (type == typeof(BabylonAbstractMesh) || type.IsSubclassOf(typeof(BabylonAbstractMesh)))
{
gltfNode.scale = babylonNode.scaling;
}
else // Camera and light
{
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;
return(gltfNode);
}
private void exportNodeRec(BabylonNode babylonNode, GLTF gltf, BabylonScene babylonScene, GLTFNode gltfParentNode = null)
{
var type = babylonNode.GetType();
// Ambiant light are attached to the scene
if (type == typeof(BabylonLight) && ((BabylonLight)babylonNode).type == 3)
{
RaiseMessage($"GLTFExporter.Light | Export light named: {babylonNode.name}", 1);
// new light in the scene extensions
GLTFLight light = new GLTFLight
{
light = AddLightExtension(ref gltf, babylonNode as BabylonLight)
};
int sceneIndex = (int)gltf.scene;
if (gltf.scenes[sceneIndex].extensions.ContainsKey(KHR_lights))
{
RaiseWarning($"Only 1 ambient light can be referenced per scene. {babylonNode.name} has overwritten the previous one.", 2);
}
gltf.scenes[sceneIndex].extensions[KHR_lights] = light;
return;
}
GLTFNode gltfNode = ExportNode(babylonNode, gltf, babylonScene, gltfParentNode);
if (gltfNode != null)
{
if (type == typeof(BabylonAbstractMesh) || type.IsSubclassOf(typeof(BabylonAbstractMesh)))
{
gltfNode = ExportAbstractMesh(ref gltfNode, babylonNode as BabylonAbstractMesh, gltf, gltfParentNode, babylonScene);
}
else if (type == typeof(BabylonCamera))
{
GLTFCamera gltfCamera = ExportCamera(ref gltfNode, babylonNode as BabylonCamera, gltf, gltfParentNode);
}
else if (type == typeof(BabylonLight) || type.IsSubclassOf(typeof(BabylonLight)))
{
ExportLight(ref gltfNode, babylonNode as BabylonLight, gltf, gltfParentNode, babylonScene);
}
else
{
RaiseError($"Node named {babylonNode.name} as no exporter", 1);
}
CheckCancelled();
// export its tag
if (babylonNode.tag != null && babylonNode.tag != "")
{
if (gltfNode.extras == null)
{
gltfNode.extras = new Dictionary <string, object>();
}
gltfNode.extras["tag"] = babylonNode.tag;
}
// ...export its children
List <BabylonNode> babylonDescendants = getDescendants(babylonNode);
babylonDescendants.ForEach(descendant => exportNodeRec(descendant, gltf, babylonScene, gltfNode));
}
}
private GLTFNode ExportAbstractMesh(BabylonAbstractMesh babylonAbstractMesh, GLTF gltf, GLTFNode gltfParentNode, BabylonScene babylonScene)
{
RaiseMessage("GLTFExporter.AbstractMesh | Export abstract mesh named: " + babylonAbstractMesh.name, 1);
// Node
var gltfNode = new GLTFNode();
gltfNode.name = babylonAbstractMesh.name;
gltfNode.index = gltf.NodesList.Count;
gltf.NodesList.Add(gltfNode);
// Hierarchy
if (gltfParentNode != null)
{
RaiseMessage("GLTFExporter.AbstractMesh | Add " + babylonAbstractMesh.name + " as child to " + gltfParentNode.name, 2);
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.AbstractMesh | Add " + babylonAbstractMesh.name + " as root node to scene", 2);
gltf.scenes[0].NodesList.Add(gltfNode.index);
}
// Transform
gltfNode.translation = babylonAbstractMesh.position;
if (babylonAbstractMesh.rotationQuaternion != null)
{
gltfNode.rotation = babylonAbstractMesh.rotationQuaternion;
}
else
{
// Convert rotation vector to quaternion
BabylonVector3 rotationVector3 = new BabylonVector3
{
X = babylonAbstractMesh.rotation[0],
Y = babylonAbstractMesh.rotation[1],
Z = babylonAbstractMesh.rotation[2]
};
gltfNode.rotation = rotationVector3.toQuaternion().ToArray();
}
gltfNode.scale = babylonAbstractMesh.scaling;
// 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);
gltfNode.skin = gltfSkin.index;
}
}
// Animations
ExportNodeAnimation(babylonAbstractMesh, gltf, gltfNode, babylonScene);
return(gltfNode);
}
// TODO - Test if ok with a gltf viewer working with custom camera (babylon loader/sandbox doesn't load them)
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);
}
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;
// Switch from left to right handed coordinate system
//gltfNode.translation[0] *= -1;
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
};
// --- prints ---
RaiseMessage("GLTFExporter.Camera | babylonCamera data", 2);
RaiseMessage("GLTFExporter.Camera | babylonCamera.type=" + babylonCamera.type, 3);
RaiseMessage("GLTFExporter.Camera | babylonCamera.fov=" + babylonCamera.fov, 3);
RaiseMessage("GLTFExporter.Camera | babylonCamera.maxZ=" + babylonCamera.maxZ, 3);
RaiseMessage("GLTFExporter.Camera | babylonCamera.minZ=" + babylonCamera.minZ, 3);
// --------------------------
// ------- 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; // TODO - How to retreive value from babylon? xmag:The floating-point horizontal magnification of the view
gltfCameraOrthographic.ymag = 1; // TODO - How to retreive value from babylon? ymag:The floating-point vertical magnification of the view
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; // 0.8f; // TODO - How to retreive value from babylon? The aspect ratio in babylon is computed based on the engine rather than set on a camera (aspectRatio = _gl.drawingBufferWidth / _gl.drawingBufferHeight)
gltfCameraPerspective.yfov = babylonCamera.fov; // WARNING - 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);
}
