到StructuredBuffer的ID3D11UnorderedAccessView数据

Question

我有两个效果。我刚刚开始使用着色器和DirectX，所以对于这个愚蠢的问题我很抱歉。第一次使用计算着色器时，它会使用RWStructuredBuffer。

RWStructuredBuffer<Particle> Particles : register(u0);

第二个：

StructuredBuffer<Particle> Particles : register(t0);

我是这样创建数据的：

//creating buffer for initial particles
D3D11_BUFFER_DESC cbDesc = {};
cbDesc.ByteWidth = sizeof(Particle)*PARTICLES_COUNT;
cbDesc.Usage = D3D11_USAGE::D3D11_USAGE_DEFAULT;
//cbDesc.BindFlags = D3D11_BIND_FLAG::D3D11_BIND_UNORDERED_ACCESS & D3D11_BIND_FLAG::D3D11_BIND_SHADER_RESOURCE;
cbDesc.BindFlags = D3D11_BIND_FLAG::D3D11_BIND_SHADER_RESOURCE;
cbDesc.CPUAccessFlags = 0;
cbDesc.MiscFlags = D3D11_RESOURCE_MISC_BUFFER_STRUCTURED;
cbDesc.StructureByteStride = sizeof(Particle);

D3D11_BUFFER_DESC cbuavDesc = {};
cbuavDesc.ByteWidth = sizeof(Particle)*PARTICLES_COUNT;
cbuavDesc.Usage = D3D11_USAGE::D3D11_USAGE_DEFAULT;
//cbuavDesc.BindFlags = D3D11_BIND_FLAG::D3D11_BIND_UNORDERED_ACCESS & D3D11_BIND_FLAG::D3D11_BIND_SHADER_RESOURCE;
cbuavDesc.BindFlags = D3D11_BIND_FLAG::D3D11_BIND_UNORDERED_ACCESS;
cbuavDesc.CPUAccessFlags = 0;
cbuavDesc.MiscFlags = D3D11_RESOURCE_MISC_BUFFER_STRUCTURED;
cbuavDesc.StructureByteStride = sizeof(Particle);

// Fill in the subresource data.
D3D11_SUBRESOURCE_DATA InitData = {};
InitData.pSysMem = &initialParticles;
InitData.SysMemPitch = sizeof(Particle)*PARTICLES_COUNT;
InitData.SysMemSlicePitch = 0;

hr = g_pd3dDevice->CreateBuffer(&cbDesc, &InitData, &solverParticles);
hr = g_pd3dDevice->CreateBuffer(&cbuavDesc, &InitData, &solverUAVParticles);

D3D11_UNORDERED_ACCESS_VIEW_DESC uvDesc = {};
uvDesc.Buffer.FirstElement = 0;
uvDesc.Buffer.NumElements = PARTICLES_COUNT;
uvDesc.Buffer.Flags = D3D11_BUFFER_UAV_FLAG_COUNTER;
uvDesc.Format = DXGI_FORMAT_UNKNOWN;
uvDesc.ViewDimension = D3D11_UAV_DIMENSION_BUFFER;

D3D11_SHADER_RESOURCE_VIEW_DESC svDesc = {};
svDesc.Buffer.NumElements = PARTICLES_COUNT;
svDesc.Buffer.FirstElement = 0;
svDesc.Format = DXGI_FORMAT_UNKNOWN;
svDesc.ViewDimension = D3D11_SRV_DIMENSION_BUFFER;


hr = g_pd3dDevice->CreateUnorderedAccessView(solverUAVParticles, &uvDesc, &g_uav);
hr = g_pd3dDevice->CreateShaderResourceView(solverParticles, &svDesc, &g_particlesStructuredBufferView);

并通过了：

hr = g_particlesUAV->SetUnorderedAccessView(g_uav);
hr = g_particlesStructuredBuffer->SetResource(g_particlesStructuredBufferView);

不幸的是，second effect渲染了初始数据，但我需要从计算着色器渲染已经更改的数据。我还没有找到任何有用的样本。非常感谢你的帮助。

Answer 1

如果没有更多关于如何使用缓冲区的细节，就很难给出一个真正的解决方案。但是奇怪的是你有两个缓冲区，一个只有无人机，而另一个只有srv！相反，您应该有一个用于就地更新的缓冲区，或两个用于乒乓的缓冲区，这两个缓冲区是uav和srv，因此您可以首先使用uav进行更新，然后将其用作srv来渲染粒子。