private void Generate(CudaKernel kernelPositionWeight, int width, int height, int depth)
{
int count = width * height * depth;
int widthD = width - 1;
int heightD = height - 1;
int depthD = depth - 1;
int countDecremented = widthD * heightD * depthD;
dim3 blockDimensions = new dim3(8, 8, 8);
dim3 gridDimensions = new dim3((int)Math.Ceiling(width / 8.0), (int)Math.Ceiling(height / 8.0), (int)Math.Ceiling(depth / 8.0));
dim3 gridDimensionsDecremented = new dim3((int)Math.Ceiling(widthD / 8.0), (int)Math.Ceiling(heightD / 8.0), (int)Math.Ceiling(depthD / 8.0));
CUDANoiseCube noiseCube = new CUDANoiseCube();
CudaArray3D noiseArray = noiseCube.GenerateUniformArray(16, 16, 16);
CudaTextureArray3D noiseTexture = new CudaTextureArray3D(kernelPositionWeight, "noiseTexture", CUAddressMode.Wrap, CUFilterMode.Linear, CUTexRefSetFlags.NormalizedCoordinates, noiseArray);
CudaDeviceVariable<Voxel> voxelsDev = new CudaDeviceVariable<Voxel>(count);
kernelPositionWeight.BlockDimensions = blockDimensions;
typeof(CudaKernel).GetField("_gridDim", BindingFlags.Instance | BindingFlags.NonPublic).SetValue(kernelPositionWeight, gridDimensions);
kernelPositionWeight.Run(voxelsDev.DevicePointer, width, height, depth);
kernelNormalAmbient.BlockDimensions = blockDimensions;
typeof(CudaKernel).GetField("_gridDim", BindingFlags.Instance | BindingFlags.NonPublic).SetValue(kernelNormalAmbient, gridDimensions);
kernelNormalAmbient.Run(voxelsDev.DevicePointer, width, height, depth, container.Settings.AmbientRayWidth, container.Settings.AmbientSamplesCount);
int nearestW = NearestPowerOfTwo(widthD);
int nearestH = NearestPowerOfTwo(heightD);
int nearestD = NearestPowerOfTwo(depthD);
int nearestCount = nearestW * nearestH * nearestD;
CudaDeviceVariable<int> trisCountDevice = new CudaDeviceVariable<int>(nearestCount);
trisCountDevice.Memset(0);
CudaDeviceVariable<int> offsetsDev = new CudaDeviceVariable<int>(countDecremented);
kernelMarchingCubesCases.BlockDimensions = blockDimensions;
typeof(CudaKernel).GetField("_gridDim", BindingFlags.Instance | BindingFlags.NonPublic).SetValue(kernelMarchingCubesCases, gridDimensionsDecremented);
kernelMarchingCubesCases.Run(voxelsDev.DevicePointer, width, height, depth, offsetsDev.DevicePointer, trisCountDevice.DevicePointer, nearestW, nearestH, nearestD);
CudaDeviceVariable<int> prefixSumsDev = prefixScan.PrefixSumArray(trisCountDevice, nearestCount);
int lastTrisCount = 0;
trisCountDevice.CopyToHost(ref lastTrisCount, (nearestCount - 1) * sizeof(int));
int lastPrefixSum = 0;
prefixSumsDev.CopyToHost(ref lastPrefixSum, (nearestCount - 1) * sizeof(int));
int totalVerticesCount = (lastTrisCount + lastPrefixSum) * 3;
if (totalVerticesCount > 0)
{
if (container.Geometry != null)
container.Geometry.Dispose();
container.VertexCount = totalVerticesCount;
container.Geometry = new Buffer(graphicsDevice, new BufferDescription()
{
BindFlags = BindFlags.VertexBuffer,
CpuAccessFlags = CpuAccessFlags.None,
OptionFlags = ResourceOptionFlags.None,
SizeInBytes = Marshal.SizeOf(typeof(VoxelMeshVertex)) * totalVerticesCount,
Usage = ResourceUsage.Default
});
CudaDirectXInteropResource directResource = new CudaDirectXInteropResource(container.Geometry.ComPointer, CUGraphicsRegisterFlags.None, CudaContext.DirectXVersion.D3D11, CUGraphicsMapResourceFlags.None);
kernelMarchingCubesVertices.BlockDimensions = blockDimensions;
typeof(CudaKernel).GetField("_gridDim", BindingFlags.Instance | BindingFlags.NonPublic).SetValue(kernelMarchingCubesVertices, gridDimensionsDecremented);
directResource.Map();
kernelMarchingCubesVertices.Run(directResource.GetMappedPointer(), voxelsDev.DevicePointer, prefixSumsDev.DevicePointer, offsetsDev.DevicePointer, width, height, depth, nearestW, nearestH, nearestD);
directResource.UnMap();
directResource.Dispose();
}
else
{
container.VertexCount = 0;
if (container.Geometry != null)
container.Geometry.Dispose();
}
noiseCube.Dispose();
prefixSumsDev.Dispose();
trisCountDevice.Dispose();
offsetsDev.Dispose();
noiseArray.Dispose();
noiseTexture.Dispose();
voxelsDev.Dispose();
}
private void Generate(CudaKernel kernelPositionWeight, int width, int height, int depth)
{
int count = width * height * depth;
int widthD = width - 1;
int heightD = height - 1;
int depthD = depth - 1;
int countDecremented = widthD * heightD * depthD;
dim3 blockDimensions = new dim3(8, 8, 8);
dim3 gridDimensions = new dim3((int)Math.Ceiling(width / 8.0), (int)Math.Ceiling(height / 8.0), (int)Math.Ceiling(depth / 8.0));
dim3 gridDimensionsDecremented = new dim3((int)Math.Ceiling(widthD / 8.0), (int)Math.Ceiling(heightD / 8.0), (int)Math.Ceiling(depthD / 8.0));
CUDANoiseCube noiseCube = new CUDANoiseCube();
CudaArray3D noiseArray = noiseCube.GenerateUniformArray(16, 16, 16);
CudaTextureArray3D noiseTexture = new CudaTextureArray3D(kernelPositionWeight, "noiseTexture", CUAddressMode.Wrap, CUFilterMode.Linear, CUTexRefSetFlags.NormalizedCoordinates, noiseArray);
CudaDeviceVariable <Voxel> voxelsDev = new CudaDeviceVariable <Voxel>(count);
kernelPositionWeight.BlockDimensions = blockDimensions;
typeof(CudaKernel).GetField("_gridDim", BindingFlags.Instance | BindingFlags.NonPublic).SetValue(kernelPositionWeight, gridDimensions);
kernelPositionWeight.Run(voxelsDev.DevicePointer, width, height, depth);
kernelNormalAmbient.BlockDimensions = blockDimensions;
typeof(CudaKernel).GetField("_gridDim", BindingFlags.Instance | BindingFlags.NonPublic).SetValue(kernelNormalAmbient, gridDimensions);
kernelNormalAmbient.Run(voxelsDev.DevicePointer, width, height, depth, container.Settings.AmbientRayWidth, container.Settings.AmbientSamplesCount);
int nearestW = NearestPowerOfTwo(widthD);
int nearestH = NearestPowerOfTwo(heightD);
int nearestD = NearestPowerOfTwo(depthD);
int nearestCount = nearestW * nearestH * nearestD;
CudaDeviceVariable <int> trisCountDevice = new CudaDeviceVariable <int>(nearestCount);
trisCountDevice.Memset(0);
CudaDeviceVariable <int> offsetsDev = new CudaDeviceVariable <int>(countDecremented);
kernelMarchingCubesCases.BlockDimensions = blockDimensions;
typeof(CudaKernel).GetField("_gridDim", BindingFlags.Instance | BindingFlags.NonPublic).SetValue(kernelMarchingCubesCases, gridDimensionsDecremented);
kernelMarchingCubesCases.Run(voxelsDev.DevicePointer, width, height, depth, offsetsDev.DevicePointer, trisCountDevice.DevicePointer, nearestW, nearestH, nearestD);
CudaDeviceVariable <int> prefixSumsDev = prefixScan.PrefixSumArray(trisCountDevice, nearestCount);
int lastTrisCount = 0;
trisCountDevice.CopyToHost(ref lastTrisCount, (nearestCount - 1) * sizeof(int));
int lastPrefixSum = 0;
prefixSumsDev.CopyToHost(ref lastPrefixSum, (nearestCount - 1) * sizeof(int));
int totalVerticesCount = (lastTrisCount + lastPrefixSum) * 3;
if (totalVerticesCount > 0)
{
if (container.Geometry != null)
{
container.Geometry.Dispose();
}
container.VertexCount = totalVerticesCount;
container.Geometry = new Buffer(graphicsDevice, new BufferDescription()
{
BindFlags = BindFlags.VertexBuffer,
CpuAccessFlags = CpuAccessFlags.None,
OptionFlags = ResourceOptionFlags.None,
SizeInBytes = Marshal.SizeOf(typeof(VoxelMeshVertex)) * totalVerticesCount,
Usage = ResourceUsage.Default
});
CudaDirectXInteropResource directResource = new CudaDirectXInteropResource(container.Geometry.ComPointer, CUGraphicsRegisterFlags.None, CudaContext.DirectXVersion.D3D11, CUGraphicsMapResourceFlags.None);
kernelMarchingCubesVertices.BlockDimensions = blockDimensions;
typeof(CudaKernel).GetField("_gridDim", BindingFlags.Instance | BindingFlags.NonPublic).SetValue(kernelMarchingCubesVertices, gridDimensionsDecremented);
directResource.Map();
kernelMarchingCubesVertices.Run(directResource.GetMappedPointer(), voxelsDev.DevicePointer, prefixSumsDev.DevicePointer, offsetsDev.DevicePointer, width, height, depth, nearestW, nearestH, nearestD);
directResource.UnMap();
directResource.Dispose();
}
else
{
container.VertexCount = 0;
if (container.Geometry != null)
{
container.Geometry.Dispose();
}
}
noiseCube.Dispose();
prefixSumsDev.Dispose();
trisCountDevice.Dispose();
offsetsDev.Dispose();
noiseArray.Dispose();
noiseTexture.Dispose();
voxelsDev.Dispose();
}
