protected virtual void BuildMeshAttributes(MeshPrimitive primitive, int meshID, int primitiveIndex)
{
if (_assetCache.MeshCache[meshID][primitiveIndex].MeshAttributes.Count == 0)
{
Dictionary <string, AttributeAccessor> attributeAccessors = new Dictionary <string, AttributeAccessor>(primitive.Attributes.Count + 1);
foreach (var attributePair in primitive.Attributes)
{
BufferCacheData bufferCacheData = _assetCache.BufferCache[attributePair.Value.Value.BufferView.Value.Buffer.Id];
AttributeAccessor AttributeAccessor = new AttributeAccessor()
{
AccessorId = attributePair.Value,
Stream = bufferCacheData.Stream,
Offset = bufferCacheData.ChunkOffset
};
attributeAccessors[attributePair.Key] = AttributeAccessor;
}
if (primitive.Indices != null)
{
BufferCacheData bufferCacheData = _assetCache.BufferCache[primitive.Indices.Value.BufferView.Value.Buffer.Id];
AttributeAccessor indexBuilder = new AttributeAccessor()
{
AccessorId = primitive.Indices,
Stream = bufferCacheData.Stream,
Offset = bufferCacheData.ChunkOffset
};
attributeAccessors[SemanticProperties.INDICES] = indexBuilder;
}
GLTFHelpers.BuildMeshAttributes(ref attributeAccessors);
_assetCache.MeshCache[meshID][primitiveIndex].MeshAttributes = attributeAccessors;
}
}
protected virtual void BuildMeshAttributes(MeshPrimitive primitive, int meshID, int primitiveIndex)
{
if (_assetCache.MeshCache[meshID][primitiveIndex].MeshAttributes.Count == 0)
{
Dictionary <string, AttributeAccessor> attributeAccessors = new Dictionary <string, AttributeAccessor>(primitive.Attributes.Count + 1);
foreach (var attributePair in primitive.Attributes)
{
BufferCacheData bufferCacheData = _assetCache.BufferCache[attributePair.Value.Value.BufferView.Value.Buffer.Id];
AttributeAccessor AttributeAccessor = new AttributeAccessor()
{
AccessorId = attributePair.Value,
Stream = bufferCacheData.Stream,
Offset = bufferCacheData.ChunkOffset
};
attributeAccessors[attributePair.Key] = AttributeAccessor;
}
if (primitive.Indices != null)
{
BufferCacheData bufferCacheData = _assetCache.BufferCache[primitive.Indices.Value.BufferView.Value.Buffer.Id];
AttributeAccessor indexBuilder = new AttributeAccessor()
{
AccessorId = primitive.Indices,
Stream = bufferCacheData.Stream,
Offset = bufferCacheData.ChunkOffset
};
attributeAccessors[SemanticProperties.INDICES] = indexBuilder;
}
GLTFHelpers.BuildMeshAttributes(ref attributeAccessors);
// Flip vectors and triangles to the Unity coordinate system.
if (attributeAccessors.ContainsKey(SemanticProperties.POSITION))
{
NumericArray resultArray = attributeAccessors[SemanticProperties.POSITION].AccessorContent;
resultArray.AsVertices = GLTFUnityHelpers.FlipVectorArrayHandedness(resultArray.AsVertices);
attributeAccessors[SemanticProperties.POSITION].AccessorContent = resultArray;
}
if (attributeAccessors.ContainsKey(SemanticProperties.INDICES))
{
NumericArray resultArray = attributeAccessors[SemanticProperties.INDICES].AccessorContent;
resultArray.AsTriangles = GLTFUnityHelpers.FlipFaces(resultArray.AsTriangles);
attributeAccessors[SemanticProperties.INDICES].AccessorContent = resultArray;
}
if (attributeAccessors.ContainsKey(SemanticProperties.NORMAL))
{
NumericArray resultArray = attributeAccessors[SemanticProperties.NORMAL].AccessorContent;
resultArray.AsNormals = GLTFUnityHelpers.FlipVectorArrayHandedness(resultArray.AsNormals);
attributeAccessors[SemanticProperties.NORMAL].AccessorContent = resultArray;
}
// TexCoord goes from 0 to 3 to match GLTFHelpers.BuildMeshAttributes
for (int i = 0; i < 4; i++)
{
if (attributeAccessors.ContainsKey(SemanticProperties.TexCoord(i)))
{
NumericArray resultArray = attributeAccessors[SemanticProperties.TexCoord(i)].AccessorContent;
resultArray.AsTexcoords = GLTFUnityHelpers.FlipTexCoordArrayV(resultArray.AsTexcoords);
attributeAccessors[SemanticProperties.TexCoord(i)].AccessorContent = resultArray;
}
}
if (attributeAccessors.ContainsKey(SemanticProperties.TANGENT))
{
NumericArray resultArray = attributeAccessors[SemanticProperties.TANGENT].AccessorContent;
resultArray.AsTangents = GLTFUnityHelpers.FlipVectorArrayHandedness(resultArray.AsTangents);
attributeAccessors[SemanticProperties.TANGENT].AccessorContent = resultArray;
}
_assetCache.MeshCache[meshID][primitiveIndex].MeshAttributes = attributeAccessors;
}
}
