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;
string message = 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.GetType() == typeof(BabylonStandardMaterial))
{
var babylonStandardMaterial = babylonMaterial as 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);
// 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;
// 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 ---
// Eye Ball correction to limit overall brightness from std to PBR.
// This only impacts the factors.
var correctedDiffuse = new BabylonColor3(babylonStandardMaterial.diffuse).scale(0.5f);
SpecularGlossiness _specularGlossiness = new SpecularGlossiness
{
diffuse = correctedDiffuse,
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;
GLTFTextureInfo textureInfoBC = new GLTFTextureInfo();
GLTFTextureInfo textureInfoMR = new GLTFTextureInfo();
if (exportParameters.writeTextures)
{
// Diffuse
Bitmap diffuseBitmap = null;
if (babylonStandardMaterial.diffuseTexture != null)
{
diffuseBitmap = TextureUtilities.LoadTexture(babylonStandardMaterial.diffuseTexture.originalPath, logger);
}
// 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)
{
// 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);
}
// 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);
gltfPbrMetallicRoughness.baseColorTexture = textureInfoBC;
}
if (isTextureOk(babylonStandardMaterial.specularTexture))
{
textureInfoMR = ExportBitmapTexture(gltf, babylonTexture, metallicRoughnessBitmap);
gltfPbrMetallicRoughness.metallicRoughnessTexture = textureInfoMR;
}
//register the texture
AddStandText(_key, textureInfoBC, textureInfoMR);
}
// 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
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 | babylonPBRMetallicRoughnessMaterial.maxSimultaneousLights=" + babylonPBRMetallicRoughnessMaterial.maxSimultaneousLights, 3);
logger.RaiseVerbose("GLTFExporter.Material | babylonPBRMetallicRoughnessMaterial.disableLighting=" + babylonPBRMetallicRoughnessMaterial.disableLighting, 3);
logger.RaiseVerbose("GLTFExporter.Material | babylonPBRMetallicRoughnessMaterial.alphaCutOff=" + babylonPBRMetallicRoughnessMaterial.alphaCutOff, 3);
logger.RaiseVerbose("GLTFExporter.Material | babylonPBRMetallicRoughnessMaterial.transparencyMode=" + babylonPBRMetallicRoughnessMaterial.transparencyMode, 3);
logger.RaiseVerbose("GLTFExporter.Material | babylonPBRMetallicRoughnessMaterial.doubleSided=" + babylonPBRMetallicRoughnessMaterial.doubleSided, 3);
// Base color
logger.RaiseVerbose("GLTFExporter.Material | babylonPBRMetallicRoughnessMaterial.baseColor.Length=" + babylonPBRMetallicRoughnessMaterial.baseColor.Length, 3);
for (int i = 0; i < babylonPBRMetallicRoughnessMaterial.baseColor.Length; i++)
{
logger.RaiseVerbose("GLTFExporter.Material | babylonPBRMetallicRoughnessMaterial.baseColor[" + i + "]=" + babylonPBRMetallicRoughnessMaterial.baseColor[i], 3);
}
if (babylonPBRMetallicRoughnessMaterial.baseTexture == null)
{
logger.RaiseVerbose("GLTFExporter.Material | babylonPBRMetallicRoughnessMaterial.baseTexture=null", 3);
}
// Metallic+roughness
logger.RaiseVerbose("GLTFExporter.Material | babylonPBRMetallicRoughnessMaterial.metallic=" + babylonPBRMetallicRoughnessMaterial.metallic, 3);
logger.RaiseVerbose("GLTFExporter.Material | babylonPBRMetallicRoughnessMaterial.roughness=" + babylonPBRMetallicRoughnessMaterial.roughness, 3);
if (babylonPBRMetallicRoughnessMaterial.metallicRoughnessTexture == null)
{
logger.RaiseVerbose("GLTFExporter.Material | babylonPBRMetallicRoughnessMaterial.metallicRoughnessTexture=null", 3);
}
// Normal / bump
if (babylonPBRMetallicRoughnessMaterial.normalTexture == null)
{
logger.RaiseVerbose("GLTFExporter.Material | babylonPBRMetallicRoughnessMaterial.normalTexture=null", 3);
}
logger.RaiseVerbose("GLTFExporter.Material | babylonPBRMetallicRoughnessMaterial.invertNormalMapX=" + babylonPBRMetallicRoughnessMaterial.invertNormalMapX, 3);
logger.RaiseVerbose("GLTFExporter.Material | babylonPBRMetallicRoughnessMaterial.invertNormalMapY=" + babylonPBRMetallicRoughnessMaterial.invertNormalMapY, 3);
// Emissive
for (int i = 0; i < babylonPBRMetallicRoughnessMaterial.emissive.Length; i++)
{
logger.RaiseVerbose("GLTFExporter.Material | babylonPBRMetallicRoughnessMaterial.emissiveColor[" + i + "]=" + babylonPBRMetallicRoughnessMaterial.emissive[i], 3);
}
if (babylonPBRMetallicRoughnessMaterial.emissiveTexture == null)
{
logger.RaiseVerbose("GLTFExporter.Material | babylonPBRMetallicRoughnessMaterial.emissiveTexture=null", 3);
}
// Ambient occlusion
logger.RaiseVerbose("GLTFExporter.Material | babylonPBRMetallicRoughnessMaterial.occlusionStrength=" + babylonPBRMetallicRoughnessMaterial.occlusionStrength, 3);
if (babylonPBRMetallicRoughnessMaterial.occlusionTexture == null)
{
logger.RaiseVerbose("GLTFExporter.Material | babylonPBRMetallicRoughnessMaterial.occlusionTexture=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);
// 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
if (babylonPBRMetallicRoughnessMaterial.occlusionTexture != null)
{
if (babylonPBRMetallicRoughnessMaterial.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, babylonPBRMetallicRoughnessMaterial.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(babylonPBRMetallicRoughnessMaterial.occlusionTexture, gltf);
}
}
// Emissive
gltfMaterial.emissiveFactor = babylonPBRMetallicRoughnessMaterial.emissive;
gltfMaterial.emissiveTexture = ExportTexture(babylonPBRMetallicRoughnessMaterial.emissiveTexture, gltf);
// --------------------------------
// --- gltfPbrMetallicRoughness ---
// --------------------------------
logger.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)
{
gltfPbrMetallicRoughness.baseColorTexture = ExportBitmapTexture(gltf, babylonPBRMetallicRoughnessMaterial.baseTexture);
}
else
{
gltfPbrMetallicRoughness.baseColorTexture = ExportTexture(babylonPBRMetallicRoughnessMaterial.baseTexture, gltf);
}
}
// Metallic roughness
gltfPbrMetallicRoughness.metallicFactor = babylonPBRMetallicRoughnessMaterial.metallic;
gltfPbrMetallicRoughness.roughnessFactor = babylonPBRMetallicRoughnessMaterial.roughness;
if (babylonPBRMetallicRoughnessMaterial.metallicRoughnessTexture != null)
{
if (babylonPBRMetallicRoughnessMaterial.metallicRoughnessTexture == babylonPBRMetallicRoughnessMaterial.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 (babylonPBRMetallicRoughnessMaterial.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, babylonPBRMetallicRoughnessMaterial.metallicRoughnessTexture);
}
else
{
// Metallic & roughness texture was already merged
// Copy file
logger.RaiseVerbose("Metallic & roughness texture was already merged", 2);
gltfPbrMetallicRoughness.metallicRoughnessTexture = ExportTexture(babylonPBRMetallicRoughnessMaterial.metallicRoughnessTexture, gltf);
}
}
}
}
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();
}
}
ExportGLTFExtension(babylonMaterial, ref gltfMaterial, gltf);
}
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);
}
else
{
RaiseMessage("GLTFExporter.Material | babylonStandardMaterial.diffuseTexture.name=" + babylonStandardMaterial.diffuseTexture.name, 3);
}
// Normal / bump
if (babylonStandardMaterial.bumpTexture == null)
{
RaiseMessage("GLTFExporter.Material | babylonStandardMaterial.bumpTexture=null", 3);
}
else
{
RaiseMessage("GLTFExporter.Material | babylonStandardMaterial.bumpTexture.name=" + babylonStandardMaterial.bumpTexture.name, 3);
}
// Opacity
if (babylonStandardMaterial.opacityTexture == null)
{
RaiseMessage("GLTFExporter.Material | babylonStandardMaterial.opacityTexture=null", 3);
}
else
{
RaiseMessage("GLTFExporter.Material | babylonStandardMaterial.opacityTexture.name=" + babylonStandardMaterial.opacityTexture.name, 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);
if (babylonStandardMaterial.specularTexture == null)
{
RaiseMessage("GLTFExporter.Material | babylonStandardMaterial.specularTexture=null", 3);
}
else
{
RaiseMessage("GLTFExporter.Material | babylonStandardMaterial.specularTexture.name=" + babylonStandardMaterial.specularTexture.name, 3);
}
// Occlusion
if (babylonStandardMaterial.ambientTexture == null)
{
RaiseMessage("GLTFExporter.Material | babylonStandardMaterial.ambientTexture=null", 3);
}
else
{
RaiseMessage("GLTFExporter.Material | babylonStandardMaterial.ambientTexture.name=" + babylonStandardMaterial.ambientTexture.name, 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);
}
else
{
RaiseMessage("GLTFExporter.Material | babylonStandardMaterial.emissiveTexture.name=" + babylonStandardMaterial.emissiveTexture.name, 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);
}
// 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.emissive.Length; i++)
{
RaiseMessage("GLTFExporter.Material | babylonPBRMetallicRoughnessMaterial.emissiveColor[" + i + "]=" + babylonPBRMetallicRoughnessMaterial.emissive[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.emissive;
gltfMaterial.emissiveTexture = ExportTexture(babylonPBRMetallicRoughnessMaterial.emissiveTexture, gltf);
// --------------------------------
// --- gltfPbrMetallicRoughness ---
// --------------------------------
RaiseMessage("GLTFExporter.Material | create gltfPbrMetallicRoughness", 2);
var gltfPbrMetallicRoughness = new GLTFPBRMetallicRoughness();
gltfMaterial.pbrMetallicRoughness = gltfPbrMetallicRoughness;
// --- Global ---
// Base color
// TODO - Unclear if alpha must be retreived from 'alpha' property of BABYLON.Material
// or from alpha channel of 'baseColor' of BABYLON.PBRMetallicRoughnessMaterial
gltfPbrMetallicRoughness.baseColorFactor = new float[4]
{
babylonPBRMetallicRoughnessMaterial.baseColor[0],
babylonPBRMetallicRoughnessMaterial.baseColor[1],
babylonPBRMetallicRoughnessMaterial.baseColor[2],
babylonPBRMetallicRoughnessMaterial.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 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 ---
// Eye Ball correction to limit overall brightness from std to PBR.
// This only impacts the factors.
var correctedDiffuse = new BabylonColor3(babylonStandardMaterial.diffuse).scale(0.5f);
SpecularGlossiness _specularGlossiness = new SpecularGlossiness
{
diffuse = correctedDiffuse,
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;
GLTFTextureInfo textureInfoBC = new GLTFTextureInfo();
GLTFTextureInfo textureInfoMR = new GLTFTextureInfo();
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)
{
// Retrieve 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);
}
}
}
}
if (baseColorBitmap != null || babylonTexture.bitmap != null)
{
var baseColorFileName = babylonMaterial.name + "_baseColor" + (isAlphaInTexture ? ".png" : ".jpg");
textureInfoBC = ExportBitmapTexture(gltf, babylonTexture, baseColorBitmap, baseColorFileName);
gltfPbrMetallicRoughness.baseColorTexture = textureInfoBC;
}
if (isTextureOk(babylonStandardMaterial.specularTexture))
{
textureInfoMR = ExportBitmapTexture(gltf, babylonTexture, metallicRoughnessBitmap, babylonMaterial.name + "_metallicRoughness" + ".jpg");
gltfPbrMetallicRoughness.metallicRoughnessTexture = textureInfoMR;
}
//register the texture
AddStandText(_key, textureInfoBC, textureInfoMR);
}
// 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
if (babylonPBRMetallicRoughnessMaterial.occlusionTexture != null)
{
if (babylonPBRMetallicRoughnessMaterial.occlusionTexture.bitmap != null)
{
// ORM texture has been merged manually by the exporter
// Occlusion is defined as well as metallic and/or roughness
RaiseVerbose("Occlusion is defined as well as metallic and/or roughness", 2);
gltfMaterial.occlusionTexture = ExportBitmapTexture(gltf, babylonPBRMetallicRoughnessMaterial.occlusionTexture);
}
else
{
// ORM texture was already merged or only occlusion is defined
RaiseVerbose("ORM texture was already merged or only occlusion is defined", 2);
gltfMaterial.occlusionTexture = ExportTexture(babylonPBRMetallicRoughnessMaterial.occlusionTexture, gltf);
}
}
// 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 == babylonPBRMetallicRoughnessMaterial.occlusionTexture)
{
// Occlusion is defined as well as metallic and/or roughness
// Use same texture
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
RaiseVerbose("Occlusion is not defined, only metallic and/or roughness", 2);
if (babylonPBRMetallicRoughnessMaterial.metallicRoughnessTexture.bitmap != null)
{
// Metallic & roughness texture has been merged manually by the exporter
// Write bitmap file
RaiseVerbose("Metallic & roughness texture has been merged manually by the exporter", 2);
gltfPbrMetallicRoughness.metallicRoughnessTexture = ExportBitmapTexture(gltf, babylonPBRMetallicRoughnessMaterial.metallicRoughnessTexture);
}
else
{
// Metallic & roughness texture was already merged
// Copy file
RaiseVerbose("Metallic & roughness texture was already merged", 2);
gltfPbrMetallicRoughness.metallicRoughnessTexture = ExportTexture(babylonPBRMetallicRoughnessMaterial.metallicRoughnessTexture, gltf);
}
}
}
}
else
{
RaiseWarning("GLTFExporter.Material | Unsupported material type: " + babylonMaterial.GetType(), 2);
}
}
//readonly List<IIGameMaterial> referencedMaterials = new List<IIGameMaterial>();
private void ExportMaterial(BabylonMaterial babylonMaterial, GLTF gltf)
{
var name = babylonMaterial.name;
var id = babylonMaterial.id;
RaiseMessage("GLTFExporter.Material | ExportMaterial name=" + name, 1);
if (babylonMaterial.GetType() == typeof(BabylonStandardMaterial))
{
RaiseMessage("GLTFExporter.Material | babylonStandardMaterial != null", 1);
var babylonStandardMaterial = babylonMaterial as BabylonStandardMaterial;
// --- prints ---
RaiseMessage("GLTFExporter.Material | babylonMaterial data", 1);
RaiseMessage("GLTFExporter.Material | babylonMaterial.alpha=" + babylonMaterial.alpha, 2);
RaiseMessage("GLTFExporter.Material | babylonMaterial.backFaceCulling=" + babylonMaterial.backFaceCulling, 2);
RaiseMessage("GLTFExporter.Material | babylonMaterial.wireframe=" + babylonMaterial.wireframe, 2);
// Ambient
for (int i = 0; i < babylonStandardMaterial.ambient.Length; i++)
{
RaiseMessage("GLTFExporter.Material | babylonStandardMaterial.ambient[" + i + "]=" + babylonStandardMaterial.ambient[i], 2);
}
// Diffuse
RaiseMessage("GLTFExporter.Material | babylonStandardMaterial.diffuse.Length=" + babylonStandardMaterial.diffuse.Length, 2);
for (int i = 0; i < babylonStandardMaterial.diffuse.Length; i++)
{
RaiseMessage("GLTFExporter.Material | babylonStandardMaterial.diffuse[" + i + "]=" + babylonStandardMaterial.diffuse[i], 2);
}
if (babylonStandardMaterial.diffuseTexture == null)
{
RaiseMessage("GLTFExporter.Material | babylonStandardMaterial.diffuseTexture=null", 2);
}
// Normal / bump
if (babylonStandardMaterial.bumpTexture == null)
{
RaiseMessage("GLTFExporter.Material | babylonStandardMaterial.bumpTexture=null", 2);
}
// Specular
for (int i = 0; i < babylonStandardMaterial.specular.Length; i++)
{
RaiseMessage("GLTFExporter.Material | babylonStandardMaterial.specular[" + i + "]=" + babylonStandardMaterial.specular[i], 2);
}
RaiseMessage("GLTFExporter.Material | babylonStandardMaterial.specularPower=" + babylonStandardMaterial.specularPower, 2);
// Occlusion
if (babylonStandardMaterial.ambientTexture == null)
{
RaiseMessage("GLTFExporter.Material | babylonStandardMaterial.ambientTexture=null", 2);
}
// Emissive
for (int i = 0; i < babylonStandardMaterial.emissive.Length; i++)
{
RaiseMessage("GLTFExporter.Material | babylonStandardMaterial.emissive[" + i + "]=" + babylonStandardMaterial.emissive[i], 2);
}
if (babylonStandardMaterial.emissiveTexture == null)
{
RaiseMessage("GLTFExporter.Material | babylonStandardMaterial.emissiveTexture=null", 2);
}
// --------------------------------
// --------- gltfMaterial ---------
// --------------------------------
RaiseMessage("GLTFExporter.Material | create gltfMaterial", 1);
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", 1);
var gltfPbrMetallicRoughness = new GLTFPBRMetallicRoughness();
gltfMaterial.pbrMetallicRoughness = gltfPbrMetallicRoughness;
// Base color
var babylonDiffuseColor = babylonStandardMaterial.diffuse;
gltfPbrMetallicRoughness.baseColorFactor = new float[4]
{
babylonDiffuseColor[0],
babylonDiffuseColor[1],
babylonDiffuseColor[2],
babylonMaterial.alpha
};
gltfPbrMetallicRoughness.baseColorTexture = ExportTexture(babylonStandardMaterial.diffuseTexture, gltf);
// TODO - Metallic roughness
gltfPbrMetallicRoughness.metallicFactor = 0; // Non metal
// TODO - roughnessFactor
// TODO - metallicRoughnessTexture
}
}
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;
// 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 ---
// --------------------------------
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 (exportParameters.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);
// Occulison
gltfMaterial.occlusionTexture = ExportTexture(babylonPBRMetallicRoughnessMaterial.occlusionTexture, gltf);
// 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)
{
gltfPbrMetallicRoughness.baseColorTexture = ExportBitmapTexture(gltf, babylonPBRMetallicRoughnessMaterial.baseTexture);
}
else
{
gltfPbrMetallicRoughness.baseColorTexture = ExportTexture(babylonPBRMetallicRoughnessMaterial.baseTexture, gltf);
}
}
// Metallic roughness
gltfPbrMetallicRoughness.metallicFactor = babylonPBRMetallicRoughnessMaterial.metallic;
gltfPbrMetallicRoughness.roughnessFactor = babylonPBRMetallicRoughnessMaterial.roughness;
gltfPbrMetallicRoughness.metallicRoughnessTexture = ExportBitmapTexture(gltf, babylonPBRMetallicRoughnessMaterial.metallicRoughnessTexture);
}
else
{
RaiseWarning("GLTFExporter.Material | Unsupported material type: " + babylonMaterial.GetType(), 2);
}
}
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.backFaceCulling=" + babylonMaterial.backFaceCulling, 3);
RaiseMessage("GLTFExporter.Material | babylonMaterial.wireframe=" + babylonMaterial.wireframe, 3);
RaiseMessage("GLTFExporter.Material | babylonStandardMaterial.specularPower=" + babylonStandardMaterial.specularPower, 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> loadTexture = delegate(string textureName)
{
var pathDiffuse = Path.Combine(gltf.OutputPath, textureName);
if (File.Exists(pathDiffuse))
{
return(new Bitmap(pathDiffuse));
}
else
{
RaiseWarning(string.Format("GLTFExporter.Material | Texture {0} not found.", textureName), 2);
return(null);
}
};
Bitmap diffuseBitmap = loadTexture(babylonStandardMaterial.diffuseTexture.name);
if (diffuseBitmap != null)
{
Bitmap specularBitmap = null;
if (babylonStandardMaterial.specularTexture != null)
{
specularBitmap = loadTexture(babylonStandardMaterial.specularTexture.name);
}
Bitmap opacityBitmap = null;
if (babylonStandardMaterial.diffuseTexture.hasAlpha == false && babylonStandardMaterial.opacityTexture != null)
{
opacityBitmap = loadTexture(babylonStandardMaterial.opacityTexture.name);
}
// Retreive dimension from diffuse map
var width = diffuseBitmap.Width;
var height = diffuseBitmap.Height;
// Create base color and metallic+roughness maps
Bitmap baseColorBitmap = new Bitmap(width, height);
Bitmap metallicRoughnessBitmap = new Bitmap(width, height);
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 :
babylonStandardMaterial.specularPower / 256.0f
};
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
gltfPbrMetallicRoughness.baseColorTexture = ExportBitmapTexture(babylonStandardMaterial.diffuseTexture, baseColorBitmap, babylonMaterial.name + "_baseColor" + ".png", gltf);
gltfPbrMetallicRoughness.metallicRoughnessTexture = ExportBitmapTexture(babylonStandardMaterial.diffuseTexture, metallicRoughnessBitmap, babylonMaterial.name + "_metallicRoughness" + ".jpg", gltf);
}
}
}
}
