public static MgtfMaterial ExtractNewMaterial(Material src)
{
MgtfMaterialTexture baseColorTexture = null;
MgtfMaterialTexture roughnessTexture = null;
var baseColorFactor = new MgVec4f(1f, 1f, 1f, 1f);
var metallicFactor = 1f;
var roughnessFactor = 1f;
var pbrInfo = src.PbrMetallicRoughness;
if (pbrInfo != null)
{
baseColorFactor = new MgVec4f
{
X = pbrInfo.BaseColorFactor[0],
Y = pbrInfo.BaseColorFactor[1],
Z = pbrInfo.BaseColorFactor[2],
W = pbrInfo.BaseColorFactor[3],
};
if (pbrInfo.BaseColorTexture != null)
{
baseColorTexture = new MgtfMaterialTexture
{
Texture = pbrInfo.BaseColorTexture.Index,
TexCoords = pbrInfo.BaseColorTexture.TexCoord,
};
metallicFactor = pbrInfo.MetallicFactor;
roughnessFactor = pbrInfo.RoughnessFactor;
}
if (pbrInfo.MetallicRoughnessTexture != null)
{
roughnessTexture = new MgtfMaterialTexture
{
Texture = pbrInfo.MetallicRoughnessTexture.Index,
TexCoords = pbrInfo.MetallicRoughnessTexture.TexCoord,
};
}
}
MgtfMaterialTexture NormalTexture = null;
float normalScale = 1f;
if (src.NormalTexture != null)
{
NormalTexture = new MgtfMaterialTexture
{
Texture = src.NormalTexture.Index,
TexCoords = src.NormalTexture.TexCoord,
};
normalScale = src.NormalTexture.Scale;
}
MgtfMaterialTexture EmissiveTexture = null;
if (src.EmissiveTexture != null)
{
EmissiveTexture = new MgtfMaterialTexture
{
Texture = src.EmissiveTexture.Index,
TexCoords = src.EmissiveTexture.TexCoord,
};
}
var emissiveFactor = new Color3f {
R = 0f, G = 0f, B = 0f
};
if (src.EmissiveFactor != null)
{
emissiveFactor = new Color3f
{
R = src.EmissiveFactor[0],
G = src.EmissiveFactor[1],
B = src.EmissiveFactor[2]
};
}
MgtfMaterialTexture OcclusionTexture = null;
float strength = 1f;
if (src.OcclusionTexture != null)
{
OcclusionTexture = new MgtfMaterialTexture
{
Texture = src.OcclusionTexture.Index,
TexCoords = src.OcclusionTexture.TexCoord,
};
strength = src.OcclusionTexture.Strength;
}
return(new MgtfMaterial
{
DoubleSided = src.DoubleSided,
AlphaCutoff = src.AlphaCutoff,
AlphaMode = ExtractAlphaMode(src.AlphaMode),
BaseColorTexture = baseColorTexture,
BaseColorFactor = baseColorFactor,
NormalTexture = NormalTexture,
NormalScale = normalScale,
EmissiveTexture = EmissiveTexture,
EmissiveFactor = emissiveFactor,
OcclusionTexture = OcclusionTexture,
OcclusionStrength = strength,
MetallicFactor = metallicFactor,
RoughnessFactor = roughnessFactor,
RoughnessTexture = roughnessTexture,
});
}
//public GltfTextureInfo[] ExtractTextures(uint bucketSize, Texture[] textures, Sampler[] samples, Image[] images)
//{
// var count = textures != null ? textures.Length : 0;
// var noOfBuckets = (count / bucketSize) + 1;
// var chunks = new GltfTextureInfo[noOfBuckets];
// for (var i = 0; i < count; i += 1)
// {
// var current = textures[i];
// current.Source.
// var info = new GltfTextureInfo
// {
// };
// chunks[i] = info;
// }
// return chunks;
//}
private GltfMaterialChunk[] ExtractMaterials(int bucketSize, Material[] materials)
{
var noOfMaterials = materials != null ? materials.Length : 0;
var noOfBuckets = (noOfMaterials / bucketSize) + 1;
var chunks = new GltfMaterialChunk[noOfBuckets];
var k = 0;
for (var i = 0; i < noOfBuckets; i += 1)
{
chunks[i] = new GltfMaterialChunk
{
Items = new GltfMaterialCapsule[bucketSize],
};
for (var j = 0; j < bucketSize; j += 1)
{
if (i == 0 && j == 0)
{
chunks[i].Items[j] = new GltfMaterialCapsule
{
DoubleSided = false,
UBO = new MaterialUBO
{
BaseTexture = 0,
BaseTextureTexCoords = 0,
BaseColorFactor = new MgVec4f(1f, 1f, 1f, 1f),
MetallicFactor = 1f,
RoughnessFactor = 1f,
NormalTexture = 0,
NormalTexCoords = 0,
NormalScale = 1f,
OcclusionTexture = 0,
OcclusionTexCoords = 0,
OcclusionStrength = 1f,
EmissiveFactor = new Color3f {
R = 0f, G = 0f, B = 0f
},
AlphaCutoff = 0.5f,
// OPAQUE
A = 1.0f, // A * vec4(fragColor.rgb, 1f))
B = 0f, // + B * vec4(step(alphacutoff, fragColor.a) * fragColor.rgb, 1f)
C = 0f, // + C * vec4(fragColor.rgb, fragColor.a)
}
};
}
else
{
if (k < noOfMaterials)
{
var src = materials[k];
var temp = new GltfMaterialCapsule
{
DoubleSided = src.DoubleSided,
};
var baseColorFactor = new MgVec4f(1f, 1f, 1f, 1f);
if (src.PbrMetallicRoughness != null)
{
baseColorFactor = new MgVec4f
{
X = src.PbrMetallicRoughness.BaseColorFactor[0],
Y = src.PbrMetallicRoughness.BaseColorFactor[1],
Z = src.PbrMetallicRoughness.BaseColorFactor[2],
W = src.PbrMetallicRoughness.BaseColorFactor[3],
};
}
ushort normalTexCoords = 0;
ushort normalTexSetOffset = 0;
float normalScale = 1f;
if (src.NormalTexture != null)
{
normalScale = src.NormalTexture.Scale;
normalTexSetOffset = (ushort)src.NormalTexture.Index;
normalTexCoords = (ushort)src.NormalTexture.TexCoord;
}
temp.UBO = new MaterialUBO
{
BaseColorFactor = baseColorFactor,
EmissiveFactor = (src.EmissiveFactor != null)
? new Color3f {
R = src.EmissiveFactor[0],
G = src.EmissiveFactor[1],
B = src.EmissiveFactor[2]
}
: new Color3f {
R = 0f, G = 0f, B = 0f
},
NormalScale = normalScale,
NormalTexCoords = normalTexCoords,
NormalTexture = normalTexSetOffset,
};
chunks[i].Items[j] = temp;
k += 1;
}
}
}
}
// Default - chunk 0, slot 0
return(chunks);
}
