void Update()
{
if (!initialized)
{
CleanUp();
// vertCountA = smrA.sharedMesh.vertexCount;
// vertCountB = smrB.sharedMesh.vertexCount;
// Debug.Log("VertexCount of A="+vertCountA+" "+"VertexCount of B="+vertCountB);
// Debug.Log("IndexFormat of A="+smrA.sharedMesh.indexFormat+" "+"IndexFormat of B="+smrB.sharedMesh.indexFormat);
//Decide how many triangles to draw, one instance = one triangle
uint indexCountA = smrA.sharedMesh.GetIndexCount(0);
uint indexCountB = smrB.sharedMesh.GetIndexCount(0);
triangleCountA = (int)indexCountA / 3;
triangleCountB = (int)indexCountB / 3;
count = Mathf.Max(triangleCountA, triangleCountB);
Debug.Log("IndexCount of A=" + indexCountA + " " + "IndexCount of B=" + indexCountB);
Debug.Log("TriangleCount of A=" + triangleCountA + " " + "TriangleCount of B=" + triangleCountB + " " + "Will draw " + count + " triangles.");
//skinned mesh buffer is not available at Start(). so need to do it here
if (bufferA == null)
{
bufferA = smrA.GetVertexBuffer();
}
if (bufferB == null)
{
bufferB = smrB.GetVertexBuffer();
}
//note that index buffer is availabe at Start() but oing this here to make code looks cleaner
smrA.sharedMesh.indexBufferTarget |= GraphicsBuffer.Target.Raw;
smrB.sharedMesh.indexBufferTarget |= GraphicsBuffer.Target.Raw;
if (bufferA_index == null || !bufferA_index.IsValid())
{
bufferA_index = smrA.sharedMesh.GetIndexBuffer();
}
if (bufferB_index == null || !bufferB_index.IsValid())
{
bufferB_index = smrB.sharedMesh.GetIndexBuffer();
}
//args buffer & bound
uint[] args = new uint[5] {
0, 0, 0, 0, 0
};
args[0] = (uint)mesh.GetIndexCount(0);
args[1] = (uint)count;
args[2] = (uint)mesh.GetIndexStart(0);
args[3] = (uint)mesh.GetBaseVertex(0);
argsBuffer = new ComputeBuffer(1, args.Length * sizeof(uint), ComputeBufferType.IndirectArguments);
argsBuffer.SetData(args);
bound = new Bounds(this.transform.position, Vector3.one * 100f);
//bind the buffers to materials
if (bufferA != null && bufferB != null && bufferA_index.IsValid() && bufferB_index.IsValid())
{
material.SetBuffer("bufVerticesA", bufferA);
material.SetBuffer("bufVerticesB", bufferB);
material.SetBuffer("bufVerticesA_index", bufferA_index);
material.SetBuffer("bufVerticesB_index", bufferB_index);
initialized = true;
Debug.Log("initialized");
}
}
else
{
//runtime values
material.SetFloat("_Progress", progress);
material.SetVector("_HipLocalPositionA", hipA.localPosition);
material.SetVector("_HipLocalPositionB", hipB.localPosition);
//Draw
Graphics.DrawMeshInstancedIndirect(mesh, 0, material, bound, argsBuffer, 0);
}
}