static D3D11UnorderedAccessView CreateBufferUAV(D3D11Device pDevice, D3D11Buffer pBuffer)
{
var descBuf = pBuffer.Description;
D3D11UnorderedAccessViewDesc desc;
if (descBuf.MiscOptions.HasFlag(D3D11ResourceMiscOptions.BufferAllowRawViews))
{
// This is a Raw Buffer
// Format must be DXGI_FORMAT_R32_TYPELESS, when creating Raw Unordered Access View
desc = new D3D11UnorderedAccessViewDesc(pBuffer, DxgiFormat.R32Typeless, 0, descBuf.ByteWidth / 4, D3D11BufferUavOptions.Raw);
}
else if (descBuf.MiscOptions.HasFlag(D3D11ResourceMiscOptions.BufferStructured))
{
// This is a Structured Buffer
// Format must be must be DXGI_FORMAT_UNKNOWN, when creating a View of a Structured Buffer
desc = new D3D11UnorderedAccessViewDesc(pBuffer, DxgiFormat.Unknown, 0, descBuf.ByteWidth / descBuf.StructureByteStride, D3D11BufferUavOptions.None);
}
else
{
throw new InvalidOperationException();
}
return(pDevice.CreateUnorderedAccessView(pBuffer, desc));
}
static void CreateResources()
{
var d3dDevice = deviceResources.D3DDevice;
// Create the Bitonic Sort Compute Shader
g_pComputeShaderBitonic = d3dDevice.CreateComputeShader(File.ReadAllBytes("CSSortBitonic.cso"), null);
// Create the Matrix Transpose Compute Shader
g_pComputeShaderTranspose = d3dDevice.CreateComputeShader(File.ReadAllBytes("CSSortTranspose.cso"), null);
// Create the Const Buffer
var constantBufferDesc = new D3D11BufferDesc(ConstantBufferData.Size, D3D11BindOptions.ConstantBuffer);
g_pCB = d3dDevice.CreateBuffer(constantBufferDesc);
// Create the Buffer of Elements
// Create 2 buffers for switching between when performing the transpose
var bufferDesc = new D3D11BufferDesc(
NUM_ELEMENTS * sizeof(uint),
D3D11BindOptions.UnorderedAccess | D3D11BindOptions.ShaderResource,
D3D11Usage.Default,
D3D11CpuAccessOptions.None,
D3D11ResourceMiscOptions.BufferStructured,
sizeof(uint));
g_pBuffer1 = d3dDevice.CreateBuffer(bufferDesc);
g_pBuffer2 = d3dDevice.CreateBuffer(bufferDesc);
// Create the Shader Resource View for the Buffers
// This is used for reading the buffer during the transpose
var srvbufferDesc = new D3D11ShaderResourceViewDesc(D3D11SrvDimension.Buffer, DxgiFormat.Unknown)
{
Buffer = new D3D11BufferSrv {
ElementWidth = NUM_ELEMENTS
}
};
g_pBuffer1SRV = d3dDevice.CreateShaderResourceView(g_pBuffer1, srvbufferDesc);
g_pBuffer2SRV = d3dDevice.CreateShaderResourceView(g_pBuffer2, srvbufferDesc);
// Create the Unordered Access View for the Buffers
// This is used for writing the buffer during the sort and transpose
var uavbufferDesc = new D3D11UnorderedAccessViewDesc(D3D11UavDimension.Buffer, DxgiFormat.Unknown)
{
Buffer = new D3D11BufferUav {
NumElements = NUM_ELEMENTS
}
};
g_pBuffer1UAV = d3dDevice.CreateUnorderedAccessView(g_pBuffer1, uavbufferDesc);
g_pBuffer2UAV = d3dDevice.CreateUnorderedAccessView(g_pBuffer2, uavbufferDesc);
// Create the Readback Buffer
// This is used to read the results back to the CPU
var readbackBufferDesc = new D3D11BufferDesc(
NUM_ELEMENTS * sizeof(uint),
D3D11BindOptions.None,
D3D11Usage.Staging,
D3D11CpuAccessOptions.Read,
D3D11ResourceMiscOptions.None,
sizeof(uint));
g_pReadBackBuffer = d3dDevice.CreateBuffer(readbackBufferDesc);
}
private void CreateParticlePosVeloBuffers()
{
var d3dDevice = this.deviceResources.D3DDevice;
// Initialize the data in the buffers
Particle[] pData1 = new Particle[MaxParticles];
Random rand = this.Random ?? new Random(0);
if (this.DiskGalaxyFormationType == 0)
{
// Disk Galaxy Formation
float fCenterSpread = Spread * 0.50f;
LoadParticles(
rand,
pData1,
0,
new XMFloat3(fCenterSpread, 0, 0),
new XMFloat4(0, 0, -20, 1 / 10000.0f / 10000.0f),
Spread,
pData1.Length / 2);
LoadParticles(
rand,
pData1,
pData1.Length / 2,
new XMFloat3(-fCenterSpread, 0, 0),
new XMFloat4(0, 0, 20, 1 / 10000.0f / 10000.0f),
Spread,
pData1.Length - pData1.Length / 2);
}
else
{
// Disk Galaxy Formation with impacting third cluster
LoadParticles(
rand,
pData1,
0,
new XMFloat3(Spread, 0, 0),
new XMFloat4(0, 0, -8, 1 / 10000.0f / 10000.0f),
Spread,
pData1.Length / 3);
LoadParticles(
rand,
pData1,
pData1.Length / 3,
new XMFloat3(-Spread, 0, 0),
new XMFloat4(0, 0, 8, 1 / 10000.0f / 10000.0f),
Spread,
pData1.Length / 3);
LoadParticles(
rand,
pData1,
2 * pData1.Length / 3,
new XMFloat3(0, 0, Spread * 15.0f),
new XMFloat4(0, 0, -60, 1 / 10000.0f / 10000.0f),
Spread,
pData1.Length - 2 * pData1.Length / 3);
}
D3D11BufferDesc desc = D3D11BufferDesc.From(pData1, D3D11BindOptions.UnorderedAccess | D3D11BindOptions.ShaderResource);
desc.MiscOptions = D3D11ResourceMiscOptions.BufferStructured;
desc.StructureByteStride = Particle.Size;
this.g_pParticlePosVelo0 = d3dDevice.CreateBuffer(desc, pData1, 0, 0);
this.g_pParticlePosVelo1 = d3dDevice.CreateBuffer(desc, pData1, 0, 0);
D3D11ShaderResourceViewDesc DescRV = new D3D11ShaderResourceViewDesc(
this.g_pParticlePosVelo0,
DxgiFormat.Unknown,
0,
desc.ByteWidth / desc.StructureByteStride);
this.g_pParticlePosVeloRV0 = d3dDevice.CreateShaderResourceView(this.g_pParticlePosVelo0, DescRV);
this.g_pParticlePosVeloRV1 = d3dDevice.CreateShaderResourceView(this.g_pParticlePosVelo1, DescRV);
D3D11UnorderedAccessViewDesc DescUAV = new D3D11UnorderedAccessViewDesc(
this.g_pParticlePosVelo0,
DxgiFormat.Unknown,
0,
desc.ByteWidth / desc.StructureByteStride);
this.g_pParticlePosVeloUAV0 = d3dDevice.CreateUnorderedAccessView(this.g_pParticlePosVelo0, DescUAV);
this.g_pParticlePosVeloUAV1 = d3dDevice.CreateUnorderedAccessView(this.g_pParticlePosVelo1, DescUAV);
}
