public static InstancedModelData CreateInstancedModelData(Model model, int[] meshDrawOrders)
{
DynamicArray <InstancedVertex> dynamicArray = new DynamicArray <InstancedVertex>();
DynamicArray <ushort> dynamicArray2 = new DynamicArray <ushort>();
for (int i = 0; i < meshDrawOrders.Length; i++)
{
ModelMesh modelMesh = model.Meshes[meshDrawOrders[i]];
foreach (ModelMeshPart meshPart in modelMesh.MeshParts)
{
_ = dynamicArray.Count;
VertexBuffer vertexBuffer = meshPart.VertexBuffer;
IndexBuffer indexBuffer = meshPart.IndexBuffer;
ReadOnlyList <VertexElement> vertexElements = vertexBuffer.VertexDeclaration.VertexElements;
ushort[] indexData = BlockMesh.GetIndexData <ushort>(indexBuffer);
Dictionary <ushort, ushort> dictionary = new Dictionary <ushort, ushort>();
if (vertexElements.Count != 3 || vertexElements[0].Offset != 0 || !(vertexElements[0].Semantic == VertexElementSemantic.Position.GetSemanticString()) || vertexElements[1].Offset != 12 || !(vertexElements[1].Semantic == VertexElementSemantic.Normal.GetSemanticString()) || vertexElements[2].Offset != 24 || !(vertexElements[2].Semantic == VertexElementSemantic.TextureCoordinate.GetSemanticString()))
{
throw new InvalidOperationException("Unsupported vertex format.");
}
SourceModelVertex[] vertexData = BlockMesh.GetVertexData <SourceModelVertex>(vertexBuffer);
for (int j = meshPart.StartIndex; j < meshPart.StartIndex + meshPart.IndicesCount; j++)
{
ushort num = indexData[j];
if (!dictionary.ContainsKey(num))
{
dictionary.Add(num, (ushort)dynamicArray.Count);
InstancedVertex item = default(InstancedVertex);
SourceModelVertex sourceModelVertex = vertexData[num];
item.X = sourceModelVertex.X;
item.Y = sourceModelVertex.Y;
item.Z = sourceModelVertex.Z;
item.Nx = sourceModelVertex.Nx;
item.Ny = sourceModelVertex.Ny;
item.Nz = sourceModelVertex.Nz;
item.Tx = sourceModelVertex.Tx;
item.Ty = sourceModelVertex.Ty;
item.Instance = modelMesh.ParentBone.Index;
dynamicArray.Add(item);
}
}
for (int k = 0; k < meshPart.IndicesCount / 3; k++)
{
dynamicArray2.Add(dictionary[indexData[meshPart.StartIndex + 3 * k]]);
dynamicArray2.Add(dictionary[indexData[meshPart.StartIndex + 3 * k + 1]]);
dynamicArray2.Add(dictionary[indexData[meshPart.StartIndex + 3 * k + 2]]);
}
}
}
InstancedModelData instancedModelData = new InstancedModelData();
instancedModelData.VertexBuffer = new VertexBuffer(InstancedModelData.VertexDeclaration, dynamicArray.Count);
instancedModelData.IndexBuffer = new IndexBuffer(IndexFormat.SixteenBits, dynamicArray2.Count);
instancedModelData.VertexBuffer.SetData(dynamicArray.Array, 0, dynamicArray.Count);
instancedModelData.IndexBuffer.SetData(dynamicArray2.Array, 0, dynamicArray2.Count);
return(instancedModelData);
}