private unsafe void MarkCascadesInStencil(MyProjectionInfo[] cascadeInfo)
{
MyGpuProfiler.IC_BeginBlock("MarkCascadesInStencil");
//RC.SetRS(MyRasterizerState.CullCW);
MyRenderContext renderContext = MyRenderContext.Immediate;
renderContext.DeviceContext.InputAssembler.PrimitiveTopology = PrimitiveTopology.TriangleList;
renderContext.SetVB(0, m_cascadesBoundingsVertices.Buffer, m_cascadesBoundingsVertices.Stride);
renderContext.SetIB(m_cubeIB.Buffer, m_cubeIB.Format);
renderContext.SetIL(m_inputLayout);
renderContext.DeviceContext.Rasterizer.SetViewport(0, 0, MyRender11.ViewportResolution.X, MyRender11.ViewportResolution.Y);
renderContext.SetCB(MyCommon.FRAME_SLOT, MyCommon.FrameConstants);
renderContext.BindDepthRT(MyGBuffer.Main.DepthStencil, DepthStencilAccess.DepthReadOnly, null);
renderContext.SetVS(m_markVS);
renderContext.SetPS(m_markPS);
const int vertexCount = 8;
Vector3D *frustumVerticesSS = stackalloc Vector3D[vertexCount];
frustumVerticesSS[0] = new Vector3D(-1, -1, 0);
frustumVerticesSS[1] = new Vector3D(-1, 1, 0);
frustumVerticesSS[2] = new Vector3D(1, 1, 0);
frustumVerticesSS[3] = new Vector3D(1, -1, 0);
frustumVerticesSS[4] = new Vector3D(-1, -1, 1);
frustumVerticesSS[5] = new Vector3D(-1, 1, 1);
frustumVerticesSS[6] = new Vector3D(1, 1, 1);
frustumVerticesSS[7] = new Vector3D(1, -1, 1);
Vector3D *lightVertices = stackalloc Vector3D[vertexCount];
Vector3 * tmpFloatVertices = stackalloc Vector3[vertexCount];
var mapping = MyMapping.MapDiscard(m_cascadesBoundingsVertices.Buffer);
for (int cascadeIndex = 0; cascadeIndex < MyRender11.Settings.ShadowCascadeCount; ++cascadeIndex)
{
var inverseViewProj = MatrixD.Invert(cascadeInfo[cascadeIndex].CurrentLocalToProjection);
for (int arrayIndex = 0; arrayIndex < vertexCount; ++arrayIndex)
{
Vector3D.Transform(ref frustumVerticesSS[arrayIndex], ref inverseViewProj, out lightVertices[arrayIndex]);
tmpFloatVertices[arrayIndex] = lightVertices[arrayIndex];
}
for (int arrayIndex = 0; arrayIndex < vertexCount; ++arrayIndex)
{
mapping.WriteAndPosition(ref tmpFloatVertices[arrayIndex]);
}
}
mapping.Unmap();
for (int cascadeIndex = 0; cascadeIndex < MyRender11.Settings.ShadowCascadeCount; ++cascadeIndex)
{
renderContext.SetDS(MyDepthStencilState.MarkIfInsideCascade[cascadeIndex], 1 << cascadeIndex);
// mark ith bit on depth near
renderContext.DeviceContext.DrawIndexed(36, 0, 8 * cascadeIndex);
}
renderContext.BindDepthRT(null, DepthStencilAccess.DepthReadOnly, null);
renderContext.SetDS(null);
renderContext.SetRS(null);
MyGpuProfiler.IC_EndBlock();
}