c++ - Directx 11 深度测试不起作用

Question

我无法让我的程序正确选择将哪些模型放在前面。我完全遵循了 MSDN 代码。我的代码似乎在 DrawIndexed 的特定调用中正确绘制了所有多边形，但每个后续调用似乎都会导致模型按照绘制顺序绘制，而不是基于它们是否靠近屏幕。

这是我初始化 Direct3d 的代码:

DXGI_SWAP_CHAIN_DESC sd;
ZeroMemory( &sd, sizeof( sd ) );
sd.BufferCount = 1;
sd.BufferDesc.Width = width;
sd.BufferDesc.Height = height;
sd.BufferDesc.Format = DXGI_FORMAT_R8G8B8A8_UNORM;
sd.BufferDesc.RefreshRate.Numerator = 60;
sd.BufferDesc.RefreshRate.Denominator = 1;
sd.BufferUsage = DXGI_USAGE_RENDER_TARGET_OUTPUT;
sd.OutputWindow = hWnd;
sd.SampleDesc.Count = 4;
sd.SampleDesc.Quality = 0;
sd.Windowed = !fullScreen;
sd.Flags = DXGI_SWAP_CHAIN_FLAG_ALLOW_MODE_SWITCH;
D3D_FEATURE_LEVEL  FeatureLevelsRequested = D3D_FEATURE_LEVEL_11_0;
UINT               numFeatureLevelsRequested = 1;
D3D_FEATURE_LEVEL  FeatureLevelsSupported;
HRESULT hr;
if( FAILED (hr = D3D11CreateDeviceAndSwapChain( adapters[0], 
    D3D_DRIVER_TYPE_UNKNOWN, 
    NULL, 
    NULL,
    NULL, 
    NULL, 
    D3D11_SDK_VERSION, 
    &sd, 
    &swapchain, 
    &dev, 
    &FeatureLevelsSupported,
    &devcon )))
{
    //return;
}
ID3D11Texture2D *pBack = NULL;
swapchain->GetBuffer(0, __uuidof(ID3D11Texture2D), (LPVOID*)&pBack);

// use the back buffer address to create the render target
dev->CreateRenderTargetView(pBack, NULL, &backbuffer);
pBack->Release();

// set the render target as the back buffer
// Create depth stencil texture
D3D11_TEXTURE2D_DESC descDepth;
ZeroMemory(&descDepth, sizeof(descDepth));
descDepth.Width = width;
descDepth.Height = height;
descDepth.MipLevels = 1;
descDepth.ArraySize = 1;
descDepth.Format =DXGI_FORMAT_D24_UNORM_S8_UINT;
descDepth.SampleDesc.Count = 4;
descDepth.SampleDesc.Quality = 0;
descDepth.Usage = D3D11_USAGE_DEFAULT;
descDepth.BindFlags = D3D11_BIND_DEPTH_STENCIL;
descDepth.CPUAccessFlags = 0;
descDepth.MiscFlags = 0;

hr = dev->CreateTexture2D( &descDepth, NULL, &g_pDepthStencil);
if(FAILED(hr))
    exit(hr);

// Create the depth stencil view
D3D11_DEPTH_STENCIL_VIEW_DESC descDSV;
ZeroMemory(&descDSV, sizeof(descDSV));

descDSV.Format = descDepth.Format;
descDSV.ViewDimension = D3D11_DSV_DIMENSION_TEXTURE2DMS;
descDSV.Texture2D.MipSlice = 0;;  
//descDSV.Texture2DMS.UnusedField_NothingToDefine = 0;  

hr = dev->CreateDepthStencilView( g_pDepthStencil, &descDSV, &g_pDepthStencilView);
if(FAILED(hr))
    exit(hr);
devcon->OMSetRenderTargets(1, &backbuffer, g_pDepthStencilView);
D3D11_VIEWPORT viewport;
ZeroMemory(&viewport, sizeof(D3D11_VIEWPORT));

viewport.TopLeftX = 0;
viewport.TopLeftY = 0;
viewport.Width = width;
viewport.Height = height;

devcon->RSSetViewports(1, &viewport);

这是我的渲染代码:

void Direct3DRenderer::Render()
{

    devcon->ClearRenderTargetView(backbuffer, D3DXCOLOR(0.0f, 0.2f, 0.4f, 1.0f));
    devcon->ClearDepthStencilView(g_pDepthStencilView,  D3D11_CLEAR_DEPTH|D3D11_CLEAR_STENCIL, 1.0f, 0 );
    camera.location = simulation->GetWorld()->GetCameraCoordinates();
    camera.direction = simulation->GetWorld()->GetCameraLookAt();
    //camera.up = simulation->GetWorld()->GetCameraOrientation();
    Vec3d lookAt = camera.location + camera.direction;
    XMVECTOR eye = XMVectorSet((float)camera.location[0], (float)camera.location[1], (float)camera.location[2], 0.f);
    XMVECTOR look = XMVectorSet(lookAt[0], lookAt[1], lookAt[2], 0);
    XMVECTOR up = XMVectorSet(camera.up[0], camera.up[1], camera.up[2], 0);
    g_View = XMMatrixLookAtLH(eye, look, up);

    ConstantBuffer oncePerFrame;
    oncePerFrame.matrix = XMMatrixTranspose(g_View);
    devcon->UpdateSubresource(oncePerFrameBuffer, 0, NULL, &oncePerFrame, 0, 0);

    UINT stride = sizeof(VERTEX);
    UINT offset = 0;

    const std::vector<Graphical*> graphicalList = simulation->GetWorld()->GetGraphicalList();

    for(int ind = 0; ind < graphicalList.size(); ++ind)
    {
        switch(graphicalList[ind]->GetModelType())
        {
            case 1:  //Sphere
                {
                    ConstantBuffer oncePerModel2;
                    oncePerModel2.matrix = XMMatrixTranspose(XMMatrixScalingFromVector(graphicalList[ind]->GetScaleX()) * XMMatrixTranslationFromVector(graphicalList[ind]->GetTranslationX()));
                    devcon->UpdateSubresource(oncePerModelBuffer, 0, NULL, &oncePerModel2, 0, 0);
                    devcon->IASetVertexBuffers(0, 1, &(sphereModel.vertexBuffer), &stride, &offset);
                    devcon->IASetIndexBuffer(sphereModel.indexBuffer, DXGI_FORMAT_R32_UINT, 0);
                    devcon->DrawIndexed(sphereModel.indexCount, 0, 0);
                }
                break;
        }
    }
    ConstantBuffer oncePerModel;
    oncePerModel.matrix = XMMatrixTranspose(g_World);
    devcon->UpdateSubresource(oncePerModelBuffer, 0, NULL, &oncePerModel, 0, 0);

    devcon->IASetVertexBuffers(0, 1, &terrainModel.vertexBuffer, &stride, &offset);
    devcon->IASetIndexBuffer(terrainModel.indexBuffer, DXGI_FORMAT_R32_UINT, 0);
    devcon->IASetPrimitiveTopology(D3D10_PRIMITIVE_TOPOLOGY_TRIANGLELIST);
    devcon->DrawIndexed(terrainModel.indexCount, 0, 0);

    swapchain->Present(0, 0);
}

我已尝试广泛搜索，并遵循了我能找到的所有教程。没有什么可以解决的。

在球体的情况下，如果从一侧观察深度似乎是正确的，但从另一侧观察则不是。

如有任何帮助，我们将不胜感激。谢谢。

Answer 1

来自 OP 评论:

The problem ended up being much simpler. I did not set the minimum and max depth for the viewport object. It worked once I did so.

我遇到了同样的问题，现在可以了:

D3D11_VIEWPORT screenViewport;
/* ... */
screenViewport.MinDepth = 0;
screenViewport.MaxDepth = 1;
/* ... */
context->RSSetViewports(1, &screenViewport);