public void CreateAccelerationStructures()
{
acs = new AccelerationStructures();
long mTlasSize = 0;
ID3D12Resource[] mpVertexBuffer = new ID3D12Resource[2];
mpVertexBuffer[0] = acs.CreateTriangleVB(mpDevice);
mpVertexBuffer[1] = acs.CreatePlaneVB(mpDevice);
// The first bottom-level buffer is for the plane and the triangle
int[] vertexCount = new int[] { 3, 6 }; // Triangle has 3 vertices, plane has 6
AccelerationStructureBuffers[] bottomLevelBuffers = new AccelerationStructureBuffers[2];
bottomLevelBuffers[0] = acs.CreateBottomLevelAS(mpDevice, mpCmdList, mpVertexBuffer, vertexCount, 2);
mpBottomLevelAS = new ID3D12Resource[2];
mpBottomLevelAS[0] = bottomLevelBuffers[0].pResult;
// The second bottom-level buffer is for the triangle only
bottomLevelBuffers[1] = acs.CreateBottomLevelAS(mpDevice, mpCmdList, mpVertexBuffer, vertexCount, 1);
mpBottomLevelAS[1] = bottomLevelBuffers[1].pResult;
// Create the TLAS
AccelerationStructureBuffers topLevelBuffers = acs.CreateTopLevelAS(mpDevice, mpCmdList, mpBottomLevelAS, ref mTlasSize);
// The tutorial doesn't have any resource lifetime management, so we flush and sync here. This is not required by the DXR spec - you can submit the list whenever you like as long as you take care of the resources lifetime.
mFenceValue = context.SubmitCommandList(mpCmdList, mpCmdQueue, mpFence, mFenceValue);
mpFence.SetEventOnCompletion(mFenceValue, mFenceEvent);
mFenceEvent.WaitOne();
int bufferIndex = mpSwapChain.GetCurrentBackBufferIndex();
mpCmdList.Reset(mFrameObjects[0].pCmdAllocator, null);
// Store the AS buffers. The rest of the buffers will be released once we exit the function
mpTopLevelAS = topLevelBuffers.pResult;
}
public void CreateAccelerationStructures()
{
acs = new AccelerationStructures();
AccelerationStructureBuffers bottomLevelBuffers = acs.CreateBottomLevelAS(mpDevice, mpCmdList);
AccelerationStructureBuffers topLevelBuffers = acs.CreateTopLevelAS(mpDevice, mpCmdList, bottomLevelBuffers.pResult, ref mTlasSize);
// The tutorial doesn't have any resource lifetime management, so we flush and sync here. This is not required by the DXR spec - you can submit the list whenever you like as long as you take care of the resources lifetime.
mFenceValue = context.SubmitCommandList(mpCmdList, mpCmdQueue, mpFence, mFenceValue);
mpFence.SetEventOnCompletion(mFenceValue, mFenceEvent);
mFenceEvent.WaitOne();
int bufferIndex = mpSwapChain.GetCurrentBackBufferIndex();
mpCmdList.Reset(mFrameObjects[0].pCmdAllocator, null);
// Store the AS buffers. The rest of the buffers will be released once we exit the function
mpTopLevelAS = topLevelBuffers.pResult;
mpBottomLevelAS = bottomLevelBuffers.pResult;
}
