public void Render(IDeviceContext context, int instanceCount)
{
context.SetRasterizerConfiguration(RasterizerConfiguration.FillFront);
context.SetVertexBuffer(0, vertexBuffer);
context.SetIndexBuffer(0, indexBuffer);
context.SetPrimitiveTopology(PrimitiveTopology.PatchListWith3ControlPoints);
context.DrawIndexedInstanced(indexCount, instanceCount, 0, 0, 0);
}
