void InitD3D(HWND winHandle)
{
DXGI_SWAP_CHAIN_DESC swapDesc;
ZeroMemory(&swapDesc, sizeof(DXGI_SWAP_CHAIN_DESC));
swapDesc.BufferCount = 1;
swapDesc.BufferDesc.Format = DXGI_FORMAT_R8G8B8A8_UNORM;
swapDesc.BufferUsage = DXGI_USAGE_RENDER_TARGET_OUTPUT;
swapDesc.OutputWindow = winHandle;
swapDesc.SampleDesc.Count = 1;
swapDesc.SampleDesc.Quality = 0;
swapDesc.Windowed = true;
UINT flags = 0;
#ifdef _DEBUG
flags |= D3D11_CREATE_DEVICE_DEBUG;
#endif // _DEBUG
CHECKDX(D3D11CreateDeviceAndSwapChain(nullptr, D3D_DRIVER_TYPE_HARDWARE, nullptr, flags, nullptr, 0, D3D11_SDK_VERSION, &swapDesc, &swapChain, &device, nullptr, &context));
ID3D11Texture2D* pBackBuffer;
swapChain->GetBuffer(0, __uuidof(ID3D11Texture2D), (LPVOID*)&pBackBuffer);
backBuffer = nullptr;
CHECKDX(device->CreateRenderTargetView(pBackBuffer, nullptr, &backBuffer));
pBackBuffer->Release();
D3D11_TEXTURE2D_DESC depthStencilDesc;
depthStencilDesc.Width = WINDOW_WIDTH;
depthStencilDesc.Height = WINDOW_HEIGHT;
depthStencilDesc.MipLevels = 1;
depthStencilDesc.ArraySize = 1;
depthStencilDesc.Format = DXGI_FORMAT_R32_TYPELESS;
depthStencilDesc.SampleDesc.Count = 1;
depthStencilDesc.SampleDesc.Quality = 0;
depthStencilDesc.Usage = D3D11_USAGE_DEFAULT;
depthStencilDesc.BindFlags = D3D11_BIND_DEPTH_STENCIL | D3D11_BIND_SHADER_RESOURCE;
depthStencilDesc.CPUAccessFlags = 0;
depthStencilDesc.MiscFlags = 0;
D3D11_DEPTH_STENCIL_VIEW_DESC dsv_desc;
dsv_desc.Flags = 0;
dsv_desc.Format = DXGI_FORMAT_D32_FLOAT;
dsv_desc.ViewDimension = D3D11_DSV_DIMENSION_TEXTURE2D;
dsv_desc.Texture2D.MipSlice = 0;
D3D11_SHADER_RESOURCE_VIEW_DESC sr_desc;
sr_desc.Format = DXGI_FORMAT_R32_FLOAT;
sr_desc.ViewDimension = D3D11_SRV_DIMENSION_TEXTURE2D;
sr_desc.Texture2D.MostDetailedMip = 0;
sr_desc.Texture2D.MipLevels = -1;
ID3D11Texture2D* DSB;
CHECKDX(device->CreateTexture2D(&depthStencilDesc, NULL, &DSB));
CHECKDX(device->CreateDepthStencilView(DSB, &dsv_desc, &depthStencilView));
CHECKDX(device->CreateShaderResourceView(DSB, &sr_desc, &depthBufferView));
DSB->Release();
//Create renderTagets for GBuffer
colorRT.CreateRenderTarget(WINDOW_WIDTH, WINDOW_HEIGHT, DXGI_FORMAT_R8G8B8A8_UNORM);
normalRT.CreateRenderTarget(WINDOW_WIDTH, WINDOW_HEIGHT, DXGI_FORMAT_R16G16B16A16_FLOAT);
positionRT.CreateRenderTarget(WINDOW_WIDTH, WINDOW_HEIGHT, DXGI_FORMAT_R16G16B16A16_FLOAT);
}
void CreateVoxelBuffers()
{
D3D11_BUFFER_DESC cbDesc;
cbDesc.ByteWidth = voxelElementCount * sizeof(uint32);
cbDesc.Usage = D3D11_USAGE_DEFAULT;
cbDesc.BindFlags = D3D11_BIND_UNORDERED_ACCESS | D3D11_BIND_SHADER_RESOURCE;
cbDesc.CPUAccessFlags = 0;
cbDesc.MiscFlags = D3D11_RESOURCE_MISC_BUFFER_ALLOW_RAW_VIEWS;
cbDesc.StructureByteStride = 0;
if (voxelStructure)
voxelStructure->Release();
CHECKDX(device->CreateBuffer(&cbDesc, nullptr, &voxelStructure));
D3D11_BUFFER_DESC voxelClearDesc;
voxelClearDesc.ByteWidth = voxelElementCount * sizeof(uint32);
voxelClearDesc.Usage = D3D11_USAGE_IMMUTABLE;
voxelClearDesc.BindFlags = D3D11_BIND_SHADER_RESOURCE;
voxelClearDesc.CPUAccessFlags = 0;
voxelClearDesc.MiscFlags = 0;
voxelClearDesc.StructureByteStride = 0;
std::vector<uint32> initVector(voxelElementCount, 0);
D3D11_SUBRESOURCE_DATA voxinitdata;
voxinitdata.pSysMem = &initVector[0];
voxinitdata.SysMemPitch = voxelElementCount * sizeof(uint32);
voxinitdata.SysMemSlicePitch = 0;
if (voxelClearBuffer)
voxelClearBuffer->Release();
CHECKDX(device->CreateBuffer(&voxelClearDesc, &voxinitdata, &voxelClearBuffer));
D3D11_UNORDERED_ACCESS_VIEW_DESC uavDesc;
uavDesc.Buffer.Flags = D3D11_BUFFER_UAV_FLAG_RAW;
uavDesc.Buffer.FirstElement = 0;
uavDesc.Buffer.NumElements = voxelElementCount;
uavDesc.Format = DXGI_FORMAT_R32_TYPELESS;
uavDesc.ViewDimension = D3D11_UAV_DIMENSION_BUFFER;
if (voxelUAV)
voxelUAV->Release();
CHECKDX(device->CreateUnorderedAccessView(voxelStructure, &uavDesc, &voxelUAV));
D3D11_SHADER_RESOURCE_VIEW_DESC voxelstructsdesc;
voxelstructsdesc.BufferEx.Flags = D3D11_BUFFEREX_SRV_FLAG_RAW;
voxelstructsdesc.BufferEx.FirstElement = 0;
voxelstructsdesc.BufferEx.NumElements = voxelElementCount;
voxelstructsdesc.ViewDimension = D3D11_SRV_DIMENSION_BUFFEREX;
voxelstructsdesc.Format = DXGI_FORMAT_R32_TYPELESS;
if (voxelSRV)
voxelSRV->Release();
CHECKDX(device->CreateShaderResourceView(voxelStructure, &voxelstructsdesc, &voxelSRV));
D3D11_BUFFER_DESC voxelStagingDesc;
voxelStagingDesc.ByteWidth = voxelElementCount * sizeof(uint32);
voxelStagingDesc.Usage = D3D11_USAGE_STAGING;
voxelStagingDesc.BindFlags = 0;
voxelStagingDesc.CPUAccessFlags = D3D11_CPU_ACCESS_READ;
voxelStagingDesc.MiscFlags = 0;
voxelStagingDesc.StructureByteStride = 0;
if (voxelStagingStructure)
voxelStagingStructure->Release();
CHECKDX(device->CreateBuffer(&voxelStagingDesc, nullptr, &voxelStagingStructure));
voxelVoidRT.CreateRenderTarget(numVoxels, numVoxels, DXGI_FORMAT_R8G8_UNORM);
}
