public ShaderResourceView GenerateNoiseTexture(Buffer constantBuffer, DirectComputeConstantBuffer container)
{
Texture3D noiseTexture = new Texture3D(graphicsDevice, new Texture3DDescription()
{
BindFlags = BindFlags.ShaderResource | BindFlags.UnorderedAccess,
CpuAccessFlags = CpuAccessFlags.None,
Format = Format.R32_Float,
MipLevels = 1,
OptionFlags = ResourceOptionFlags.None,
Usage = ResourceUsage.Default,
Width = container.Width,
Height = container.Height,
Depth = container.Depth
});
UnorderedAccessView noiseTextureUAV = new UnorderedAccessView(graphicsDevice, noiseTexture);
DataBox data = graphicsDevice.ImmediateContext.MapSubresource(constantBuffer, MapMode.WriteDiscard, MapFlags.None);
data.Data.Write<DirectComputeConstantBuffer>(container);
graphicsDevice.ImmediateContext.UnmapSubresource(constantBuffer, 0);
graphicsDevice.ImmediateContext.ComputeShader.Set(computeFillNoiseTexture);
graphicsDevice.ImmediateContext.ComputeShader.SetConstantBuffer(constantBuffer, 0);
graphicsDevice.ImmediateContext.ComputeShader.SetUnorderedAccessView(noiseTextureUAV, 0);
Vector3 gridDim = new Vector3((float)Math.Ceiling(container.Width / 8.0f), (float)Math.Ceiling(container.Height / 8.0f), (float)Math.Ceiling(container.Depth / 8.0f));
graphicsDevice.ImmediateContext.Dispatch((int)gridDim.X, (int)gridDim.Y, (int)gridDim.Z);
noiseTextureUAV.Dispose();
return new ShaderResourceView(graphicsDevice, noiseTexture);
}
public ShaderResourceView GenerateNoiseTexture(Buffer constantBuffer, DirectComputeConstantBuffer container)
{
Texture3D noiseTexture = new Texture3D(graphicsDevice, new Texture3DDescription()
{
BindFlags = BindFlags.ShaderResource | BindFlags.UnorderedAccess,
CpuAccessFlags = CpuAccessFlags.None,
Format = Format.R32_Float,
MipLevels = 1,
OptionFlags = ResourceOptionFlags.None,
Usage = ResourceUsage.Default,
Width = container.Width,
Height = container.Height,
Depth = container.Depth
});
UnorderedAccessView noiseTextureUAV = new UnorderedAccessView(graphicsDevice, noiseTexture);
DataBox data = graphicsDevice.ImmediateContext.MapSubresource(constantBuffer, MapMode.WriteDiscard, MapFlags.None);
data.Data.Write <DirectComputeConstantBuffer>(container);
graphicsDevice.ImmediateContext.UnmapSubresource(constantBuffer, 0);
graphicsDevice.ImmediateContext.ComputeShader.Set(computeFillNoiseTexture);
graphicsDevice.ImmediateContext.ComputeShader.SetConstantBuffer(constantBuffer, 0);
graphicsDevice.ImmediateContext.ComputeShader.SetUnorderedAccessView(noiseTextureUAV, 0);
Vector3 gridDim = new Vector3((float)Math.Ceiling(container.Width / 8.0f), (float)Math.Ceiling(container.Height / 8.0f), (float)Math.Ceiling(container.Depth / 8.0f));
graphicsDevice.ImmediateContext.Dispatch((int)gridDim.X, (int)gridDim.Y, (int)gridDim.Z);
noiseTextureUAV.Dispose();
return(new ShaderResourceView(graphicsDevice, noiseTexture));
}
public UnorderedAccessView PrefixSumArray(Buffer constantBuffer, UnorderedAccessView trisCountUAV)
{
int arrayLength = trisCountUAV.Description.ElementCount;
int batchSize = trisCountUAV.Description.ElementCount / arrayLength;
if (!IsPowerOfTwo(trisCountUAV.Description.ElementCount))
throw new Exception("Input array length is not power of two.");
Buffer buffer = new Buffer(graphicsDevice, new BufferDescription()
{
BindFlags = BindFlags.UnorderedAccess,
CpuAccessFlags = CpuAccessFlags.None,
OptionFlags = ResourceOptionFlags.StructuredBuffer,
Usage = ResourceUsage.Default,
SizeInBytes = Marshal.SizeOf(typeof(int)) * trisCountUAV.Description.ElementCount,
StructureByteStride = Marshal.SizeOf(typeof(int))
});
UnorderedAccessView bufferUAV = new UnorderedAccessView(graphicsDevice, buffer);
Buffer output = new Buffer(graphicsDevice, new BufferDescription()
{
BindFlags = BindFlags.UnorderedAccess,
CpuAccessFlags = CpuAccessFlags.None,
OptionFlags = ResourceOptionFlags.StructuredBuffer,
Usage = ResourceUsage.Default,
SizeInBytes = Marshal.SizeOf(typeof(int)) * trisCountUAV.Description.ElementCount,
StructureByteStride = Marshal.SizeOf(typeof(int))
});
UnorderedAccessView outputUAV = new UnorderedAccessView(graphicsDevice, output);
DirectComputeConstantBuffer constantBufferContainer = new DirectComputeConstantBuffer()
{
PrefixSize = 4 * threadBlockSize,
PrefixN = (batchSize * arrayLength) / (4 * threadBlockSize),
PrefixArrayLength = arrayLength / (4 * threadBlockSize)
};
DataBox data = graphicsDevice.ImmediateContext.MapSubresource(constantBuffer, MapMode.WriteDiscard, MapFlags.None);
data.Data.Write<DirectComputeConstantBuffer>(constantBufferContainer);
graphicsDevice.ImmediateContext.UnmapSubresource(constantBuffer, 0);
Vector3 gridDim = new Vector3((batchSize * arrayLength) / (4 * threadBlockSize), 1, 1);
Vector3 gridDimShared2 = new Vector3((int)Math.Ceiling(((batchSize * arrayLength) / (4 * threadBlockSize)) / (double)threadBlockSize), 1, 1);
graphicsDevice.ImmediateContext.ComputeShader.Set(computeScanExclusiveShared);
graphicsDevice.ImmediateContext.ComputeShader.SetConstantBuffer(constantBuffer, 0);
graphicsDevice.ImmediateContext.ComputeShader.SetUnorderedAccessView(trisCountUAV, 2);
graphicsDevice.ImmediateContext.ComputeShader.SetUnorderedAccessView(outputUAV, 3);
graphicsDevice.ImmediateContext.ComputeShader.SetUnorderedAccessView(bufferUAV, 4);
graphicsDevice.ImmediateContext.Dispatch((int)gridDim.X, (int)gridDim.Y, (int)gridDim.Z);
graphicsDevice.ImmediateContext.ComputeShader.Set(computeScanExclusiveShared2);
graphicsDevice.ImmediateContext.Dispatch((int)gridDimShared2.X, (int)gridDimShared2.Y, (int)gridDimShared2.Z);
graphicsDevice.ImmediateContext.ComputeShader.Set(computeUniformUpdate);
graphicsDevice.ImmediateContext.Dispatch((int)gridDim.X, (int)gridDim.Y, (int)gridDim.Z);
buffer.Dispose();
bufferUAV.Dispose();
return outputUAV;
}
private void Generate(ComputeShader computePositionWeight, int width, int height, int depth)
{
int count = width * height * depth;
int widthD = width - 1;
int heightD = height - 1;
int depthD = depth - 1;
int countD = widthD * heightD * depthD;
int nearestW = NearestPowerOfTwo(widthD);
int nearestH = NearestPowerOfTwo(heightD);
int nearestD = NearestPowerOfTwo(depthD);
int nearestCount = nearestW * nearestH * nearestD;
Vector3 gridDim = new Vector3((float)Math.Ceiling(width / 8.0f), (float)Math.Ceiling(height / 8.0f), (float)Math.Ceiling(depth / 8.0f));
Vector3 gridDimD = new Vector3((float)Math.Ceiling(widthD / 8.0f), (float)Math.Ceiling(heightD / 8.0f), (float)Math.Ceiling(depthD / 8.0f));
constantBufferContainer = new DirectComputeConstantBuffer()
{
Width = 16,
Height = 16,
Depth = 16,
Seed = (int)DateTime.Now.Ticks
};
DirectComputeNoiseCube noiseCube = new DirectComputeNoiseCube(graphicsDevice);
ShaderResourceView noiseSRV = noiseCube.GenerateNoiseTexture(constantBuffer, constantBufferContainer);
Buffer voxelsBuffer = new Buffer(graphicsDevice, new BufferDescription()
{
BindFlags = BindFlags.UnorderedAccess,
CpuAccessFlags = CpuAccessFlags.None,
OptionFlags = ResourceOptionFlags.StructuredBuffer,
Usage = ResourceUsage.Default,
SizeInBytes = Marshal.SizeOf(typeof(Voxel)) * count,
StructureByteStride = Marshal.SizeOf(typeof(Voxel))
});
UnorderedAccessView voxelsUAV = new UnorderedAccessView(graphicsDevice, voxelsBuffer);
constantBufferContainer = new DirectComputeConstantBuffer()
{
Width = width,
Height = height,
Depth = depth,
AmbientRayWidth = container.Settings.AmbientRayWidth,
AmbientSamplesCount = container.Settings.AmbientSamplesCount,
NearestWidth = nearestW,
NearestHeight = nearestH,
NearestDepth = nearestD
};
DataBox data = graphicsDevice.ImmediateContext.MapSubresource(constantBuffer, MapMode.WriteDiscard, MapFlags.None);
data.Data.Write <DirectComputeConstantBuffer>(constantBufferContainer);
graphicsDevice.ImmediateContext.UnmapSubresource(constantBuffer, 0);
graphicsDevice.ImmediateContext.ComputeShader.Set(computePositionWeight);
graphicsDevice.ImmediateContext.ComputeShader.SetConstantBuffer(constantBuffer, 0);
graphicsDevice.ImmediateContext.ComputeShader.SetUnorderedAccessView(voxelsUAV, 0);
graphicsDevice.ImmediateContext.ComputeShader.SetShaderResource(noiseSRV, 0);
graphicsDevice.ImmediateContext.Dispatch((int)gridDim.X, (int)gridDim.Y, (int)gridDim.Z);
graphicsDevice.ImmediateContext.ComputeShader.Set(computeNormalAmbient);
graphicsDevice.ImmediateContext.Dispatch((int)gridDim.X, (int)gridDim.Y, (int)gridDim.Z);
Buffer offsetsBuffer = new Buffer(graphicsDevice, new BufferDescription()
{
BindFlags = BindFlags.UnorderedAccess,
CpuAccessFlags = CpuAccessFlags.None,
OptionFlags = ResourceOptionFlags.StructuredBuffer,
Usage = ResourceUsage.Default,
SizeInBytes = Marshal.SizeOf(typeof(int)) * countD,
StructureByteStride = Marshal.SizeOf(typeof(int))
});
UnorderedAccessView offsetsUAV = new UnorderedAccessView(graphicsDevice, offsetsBuffer);
Buffer trisCountBuffer = new Buffer(graphicsDevice, new BufferDescription()
{
BindFlags = BindFlags.UnorderedAccess,
CpuAccessFlags = CpuAccessFlags.None,
OptionFlags = ResourceOptionFlags.StructuredBuffer,
Usage = ResourceUsage.Default,
SizeInBytes = Marshal.SizeOf(typeof(int)) * nearestCount,
StructureByteStride = Marshal.SizeOf(typeof(int))
});
UnorderedAccessView trisCountUAV = new UnorderedAccessView(graphicsDevice, trisCountBuffer);
graphicsDevice.ImmediateContext.ClearUnorderedAccessView(trisCountUAV, new int[] { 0, 0, 0, 0 });
graphicsDevice.ImmediateContext.ComputeShader.Set(computeMarchingCubesCases);
graphicsDevice.ImmediateContext.ComputeShader.SetUnorderedAccessView(offsetsUAV, 1);
graphicsDevice.ImmediateContext.ComputeShader.SetUnorderedAccessView(trisCountUAV, 2);
graphicsDevice.ImmediateContext.Dispatch((int)gridDimD.X, (int)gridDimD.Y, (int)gridDimD.Z);
UnorderedAccessView prefixSumsUAV = prefixScan.PrefixSumArray(constantBuffer, trisCountUAV);
int lastTrisCount = DirectComputeBufferHelper.CopyBuffer <int>(graphicsDevice, trisCountBuffer, nearestCount - 1, 1)[0];
int lastPrefixSum = DirectComputeBufferHelper.CopyBuffer <int>(graphicsDevice, prefixSumsUAV.Resource, nearestCount - 1, 1)[0];
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
});
Buffer verticesBuffer = new Buffer(graphicsDevice, new BufferDescription()
{
BindFlags = BindFlags.UnorderedAccess,
CpuAccessFlags = CpuAccessFlags.None,
OptionFlags = ResourceOptionFlags.StructuredBuffer,
Usage = ResourceUsage.Default,
SizeInBytes = Marshal.SizeOf(typeof(VoxelMeshVertex)) * totalVerticesCount,
StructureByteStride = Marshal.SizeOf(typeof(VoxelMeshVertex))
});
UnorderedAccessView verticesUAV = new UnorderedAccessView(graphicsDevice, verticesBuffer);
constantBufferContainer = new DirectComputeConstantBuffer()
{
Width = width,
Height = height,
Depth = depth,
NearestWidth = nearestW,
NearestHeight = nearestH,
NearestDepth = nearestD
};
data = graphicsDevice.ImmediateContext.MapSubresource(constantBuffer, MapMode.WriteDiscard, MapFlags.None);
data.Data.Write <DirectComputeConstantBuffer>(constantBufferContainer);
graphicsDevice.ImmediateContext.UnmapSubresource(constantBuffer, 0);
graphicsDevice.ImmediateContext.ComputeShader.Set(computeMarchingCubesVertices);
graphicsDevice.ImmediateContext.ComputeShader.SetUnorderedAccessView(trisCountUAV, 2);
graphicsDevice.ImmediateContext.ComputeShader.SetUnorderedAccessView(prefixSumsUAV, 3);
graphicsDevice.ImmediateContext.ComputeShader.SetUnorderedAccessView(verticesUAV, 5);
graphicsDevice.ImmediateContext.Dispatch((int)gridDimD.X, (int)gridDimD.Y, (int)gridDimD.Z);
graphicsDevice.ImmediateContext.CopyResource(verticesBuffer, container.Geometry);
verticesUAV.Dispose();
verticesBuffer.Dispose();
}
else
{
container.VertexCount = 0;
if (container.Geometry != null)
{
container.Geometry.Dispose();
}
}
for (int i = 0; i <= 5; i++)
{
graphicsDevice.ImmediateContext.ComputeShader.SetUnorderedAccessView(null, i);
}
prefixSumsUAV.Resource.Dispose();
prefixSumsUAV.Dispose();
noiseCube.Dispose();
noiseSRV.Resource.Dispose();
noiseSRV.Dispose();
voxelsBuffer.Dispose();
voxelsUAV.Dispose();
offsetsBuffer.Dispose();
offsetsUAV.Dispose();
trisCountBuffer.Dispose();
trisCountUAV.Dispose();
}
private void Generate(ComputeShader computePositionWeight, int width, int height, int depth)
{
int count = width * height * depth;
int widthD = width - 1;
int heightD = height - 1;
int depthD = depth - 1;
int countD = widthD * heightD * depthD;
int nearestW = NearestPowerOfTwo(widthD);
int nearestH = NearestPowerOfTwo(heightD);
int nearestD = NearestPowerOfTwo(depthD);
int nearestCount = nearestW * nearestH * nearestD;
Vector3 gridDim = new Vector3((float)Math.Ceiling(width / 8.0f), (float)Math.Ceiling(height / 8.0f), (float)Math.Ceiling(depth / 8.0f));
Vector3 gridDimD = new Vector3((float)Math.Ceiling(widthD / 8.0f), (float)Math.Ceiling(heightD / 8.0f), (float)Math.Ceiling(depthD / 8.0f));
constantBufferContainer = new DirectComputeConstantBuffer()
{
Width = 16,
Height = 16,
Depth = 16,
Seed = (int)DateTime.Now.Ticks
};
DirectComputeNoiseCube noiseCube = new DirectComputeNoiseCube(graphicsDevice);
ShaderResourceView noiseSRV = noiseCube.GenerateNoiseTexture(constantBuffer, constantBufferContainer);
Buffer voxelsBuffer = new Buffer(graphicsDevice, new BufferDescription()
{
BindFlags = BindFlags.UnorderedAccess,
CpuAccessFlags = CpuAccessFlags.None,
OptionFlags = ResourceOptionFlags.StructuredBuffer,
Usage = ResourceUsage.Default,
SizeInBytes = Marshal.SizeOf(typeof(Voxel)) * count,
StructureByteStride = Marshal.SizeOf(typeof(Voxel))
});
UnorderedAccessView voxelsUAV = new UnorderedAccessView(graphicsDevice, voxelsBuffer);
constantBufferContainer = new DirectComputeConstantBuffer()
{
Width = width,
Height = height,
Depth = depth,
AmbientRayWidth = container.Settings.AmbientRayWidth,
AmbientSamplesCount = container.Settings.AmbientSamplesCount,
NearestWidth = nearestW,
NearestHeight = nearestH,
NearestDepth = nearestD
};
DataBox data = graphicsDevice.ImmediateContext.MapSubresource(constantBuffer, MapMode.WriteDiscard, MapFlags.None);
data.Data.Write<DirectComputeConstantBuffer>(constantBufferContainer);
graphicsDevice.ImmediateContext.UnmapSubresource(constantBuffer, 0);
graphicsDevice.ImmediateContext.ComputeShader.Set(computePositionWeight);
graphicsDevice.ImmediateContext.ComputeShader.SetConstantBuffer(constantBuffer, 0);
graphicsDevice.ImmediateContext.ComputeShader.SetUnorderedAccessView(voxelsUAV, 0);
graphicsDevice.ImmediateContext.ComputeShader.SetShaderResource(noiseSRV, 0);
graphicsDevice.ImmediateContext.Dispatch((int)gridDim.X, (int)gridDim.Y, (int)gridDim.Z);
graphicsDevice.ImmediateContext.ComputeShader.Set(computeNormalAmbient);
graphicsDevice.ImmediateContext.Dispatch((int)gridDim.X, (int)gridDim.Y, (int)gridDim.Z);
Buffer offsetsBuffer = new Buffer(graphicsDevice, new BufferDescription()
{
BindFlags = BindFlags.UnorderedAccess,
CpuAccessFlags = CpuAccessFlags.None,
OptionFlags = ResourceOptionFlags.StructuredBuffer,
Usage = ResourceUsage.Default,
SizeInBytes = Marshal.SizeOf(typeof(int)) * countD,
StructureByteStride = Marshal.SizeOf(typeof(int))
});
UnorderedAccessView offsetsUAV = new UnorderedAccessView(graphicsDevice, offsetsBuffer);
Buffer trisCountBuffer = new Buffer(graphicsDevice, new BufferDescription()
{
BindFlags = BindFlags.UnorderedAccess,
CpuAccessFlags = CpuAccessFlags.None,
OptionFlags = ResourceOptionFlags.StructuredBuffer,
Usage = ResourceUsage.Default,
SizeInBytes = Marshal.SizeOf(typeof(int)) * nearestCount,
StructureByteStride = Marshal.SizeOf(typeof(int))
});
UnorderedAccessView trisCountUAV = new UnorderedAccessView(graphicsDevice, trisCountBuffer);
graphicsDevice.ImmediateContext.ClearUnorderedAccessView(trisCountUAV, new int[] { 0, 0, 0, 0 });
graphicsDevice.ImmediateContext.ComputeShader.Set(computeMarchingCubesCases);
graphicsDevice.ImmediateContext.ComputeShader.SetUnorderedAccessView(offsetsUAV, 1);
graphicsDevice.ImmediateContext.ComputeShader.SetUnorderedAccessView(trisCountUAV, 2);
graphicsDevice.ImmediateContext.Dispatch((int)gridDimD.X, (int)gridDimD.Y, (int)gridDimD.Z);
UnorderedAccessView prefixSumsUAV = prefixScan.PrefixSumArray(constantBuffer, trisCountUAV);
int lastTrisCount = DirectComputeBufferHelper.CopyBuffer<int>(graphicsDevice, trisCountBuffer, nearestCount - 1, 1)[0];
int lastPrefixSum = DirectComputeBufferHelper.CopyBuffer<int>(graphicsDevice, prefixSumsUAV.Resource, nearestCount - 1, 1)[0];
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
});
Buffer verticesBuffer = new Buffer(graphicsDevice, new BufferDescription()
{
BindFlags = BindFlags.UnorderedAccess,
CpuAccessFlags = CpuAccessFlags.None,
OptionFlags = ResourceOptionFlags.StructuredBuffer,
Usage = ResourceUsage.Default,
SizeInBytes = Marshal.SizeOf(typeof(VoxelMeshVertex)) * totalVerticesCount,
StructureByteStride = Marshal.SizeOf(typeof(VoxelMeshVertex))
});
UnorderedAccessView verticesUAV = new UnorderedAccessView(graphicsDevice, verticesBuffer);
constantBufferContainer = new DirectComputeConstantBuffer()
{
Width = width,
Height = height,
Depth = depth,
NearestWidth = nearestW,
NearestHeight = nearestH,
NearestDepth = nearestD
};
data = graphicsDevice.ImmediateContext.MapSubresource(constantBuffer, MapMode.WriteDiscard, MapFlags.None);
data.Data.Write<DirectComputeConstantBuffer>(constantBufferContainer);
graphicsDevice.ImmediateContext.UnmapSubresource(constantBuffer, 0);
graphicsDevice.ImmediateContext.ComputeShader.Set(computeMarchingCubesVertices);
graphicsDevice.ImmediateContext.ComputeShader.SetUnorderedAccessView(trisCountUAV, 2);
graphicsDevice.ImmediateContext.ComputeShader.SetUnorderedAccessView(prefixSumsUAV, 3);
graphicsDevice.ImmediateContext.ComputeShader.SetUnorderedAccessView(verticesUAV, 5);
graphicsDevice.ImmediateContext.Dispatch((int)gridDimD.X, (int)gridDimD.Y, (int)gridDimD.Z);
graphicsDevice.ImmediateContext.CopyResource(verticesBuffer, container.Geometry);
verticesUAV.Dispose();
verticesBuffer.Dispose();
}
else
{
container.VertexCount = 0;
if (container.Geometry != null)
container.Geometry.Dispose();
}
for (int i = 0; i <= 5; i++)
{
graphicsDevice.ImmediateContext.ComputeShader.SetUnorderedAccessView(null, i);
}
prefixSumsUAV.Resource.Dispose();
prefixSumsUAV.Dispose();
noiseCube.Dispose();
noiseSRV.Resource.Dispose();
noiseSRV.Dispose();
voxelsBuffer.Dispose();
voxelsUAV.Dispose();
offsetsBuffer.Dispose();
offsetsUAV.Dispose();
trisCountBuffer.Dispose();
trisCountUAV.Dispose();
}
public UnorderedAccessView PrefixSumArray(Buffer constantBuffer, UnorderedAccessView trisCountUAV)
{
int arrayLength = trisCountUAV.Description.ElementCount;
int batchSize = trisCountUAV.Description.ElementCount / arrayLength;
if (!IsPowerOfTwo(trisCountUAV.Description.ElementCount))
{
throw new Exception("Input array length is not power of two.");
}
Buffer buffer = new Buffer(graphicsDevice, new BufferDescription()
{
BindFlags = BindFlags.UnorderedAccess,
CpuAccessFlags = CpuAccessFlags.None,
OptionFlags = ResourceOptionFlags.StructuredBuffer,
Usage = ResourceUsage.Default,
SizeInBytes = Marshal.SizeOf(typeof(int)) * trisCountUAV.Description.ElementCount,
StructureByteStride = Marshal.SizeOf(typeof(int))
});
UnorderedAccessView bufferUAV = new UnorderedAccessView(graphicsDevice, buffer);
Buffer output = new Buffer(graphicsDevice, new BufferDescription()
{
BindFlags = BindFlags.UnorderedAccess,
CpuAccessFlags = CpuAccessFlags.None,
OptionFlags = ResourceOptionFlags.StructuredBuffer,
Usage = ResourceUsage.Default,
SizeInBytes = Marshal.SizeOf(typeof(int)) * trisCountUAV.Description.ElementCount,
StructureByteStride = Marshal.SizeOf(typeof(int))
});
UnorderedAccessView outputUAV = new UnorderedAccessView(graphicsDevice, output);
DirectComputeConstantBuffer constantBufferContainer = new DirectComputeConstantBuffer()
{
PrefixSize = 4 * threadBlockSize,
PrefixN = (batchSize * arrayLength) / (4 * threadBlockSize),
PrefixArrayLength = arrayLength / (4 * threadBlockSize)
};
DataBox data = graphicsDevice.ImmediateContext.MapSubresource(constantBuffer, MapMode.WriteDiscard, MapFlags.None);
data.Data.Write <DirectComputeConstantBuffer>(constantBufferContainer);
graphicsDevice.ImmediateContext.UnmapSubresource(constantBuffer, 0);
Vector3 gridDim = new Vector3((batchSize * arrayLength) / (4 * threadBlockSize), 1, 1);
Vector3 gridDimShared2 = new Vector3((int)Math.Ceiling(((batchSize * arrayLength) / (4 * threadBlockSize)) / (double)threadBlockSize), 1, 1);
graphicsDevice.ImmediateContext.ComputeShader.Set(computeScanExclusiveShared);
graphicsDevice.ImmediateContext.ComputeShader.SetConstantBuffer(constantBuffer, 0);
graphicsDevice.ImmediateContext.ComputeShader.SetUnorderedAccessView(trisCountUAV, 2);
graphicsDevice.ImmediateContext.ComputeShader.SetUnorderedAccessView(outputUAV, 3);
graphicsDevice.ImmediateContext.ComputeShader.SetUnorderedAccessView(bufferUAV, 4);
graphicsDevice.ImmediateContext.Dispatch((int)gridDim.X, (int)gridDim.Y, (int)gridDim.Z);
graphicsDevice.ImmediateContext.ComputeShader.Set(computeScanExclusiveShared2);
graphicsDevice.ImmediateContext.Dispatch((int)gridDimShared2.X, (int)gridDimShared2.Y, (int)gridDimShared2.Z);
graphicsDevice.ImmediateContext.ComputeShader.Set(computeUniformUpdate);
graphicsDevice.ImmediateContext.Dispatch((int)gridDim.X, (int)gridDim.Y, (int)gridDim.Z);
buffer.Dispose();
bufferUAV.Dispose();
return(outputUAV);
}