Untitled

void DoSkinning(
	in VertexInputType input,
	out float4 position,
	out float3 normal,
	out float3 tangent,
	out float3 binormal)
{
	float4x4 FramePoseMatrices[4];
	FramePoseMatrices[0] = tranforms[input.BoneIndices.x];
	FramePoseMatrices[1] = tranforms[input.BoneIndices.y];
	FramePoseMatrices[2] = tranforms[input.BoneIndices.z];
	FramePoseMatrices[3] = tranforms[input.BoneIndices.w];

	position = 0;
	normal = 0;
	tangent = 0;
	binormal = 0;
	
	[unroll]
	for (int i = 0; i < weights_per_vertex; i++)
	{
		// transform vertex position
		position +=
			input.Weights[i] * mul(float4(input.position.xyz, 1), FramePoseMatrices[i]);

		// tranform lighting vectors, only use rotation part (3x3) of matrices 
		normal.xyz +=
			input.Weights[i] * mul(input.normal.xyz, (float3x3) FramePoseMatrices[i]);
		tangent.xyz +=
			input.Weights[i] * mul(input.tangent.xyz, (float3x3) FramePoseMatrices[i]);
		binormal.xyz +=
			input.Weights[i] * mul(input.binormal.xyz, (float3x3) FramePoseMatrices[i]);

	}
}