问(DX12阴影映射)深度缓冲区总是填充1

EN

D3D12_TEX2D_SRV texDesc = {
        0,
        -1,
        0,
        0.0f
    };
    D3D12_SHADER_RESOURCE_VIEW_DESC srvDesc = {
        DXGI_FORMAT_R32_TYPELESS,
        D3D12_SRV_DIMENSION_TEXTURE2D,
        D3D12_DEFAULT_SHADER_4_COMPONENT_MAPPING,
    };
    srvDesc.Texture2D = texDesc;

    m_device->CreateShaderResourceView(m_lightDepthTexture.Get(),&srvDesc, m_cbvHeap->GetCPUDescriptorHandleForHeapStart());

D3D12_DESCRIPTOR_HEAP_DESC dsvHeapDesc = {};
    dsvHeapDesc.NumDescriptors = 2;
    dsvHeapDesc.Type = D3D12_DESCRIPTOR_HEAP_TYPE_DSV;
    dsvHeapDesc.Flags = D3D12_DESCRIPTOR_HEAP_FLAG_NONE;
    ThrowIfFailed(m_device->CreateDescriptorHeap(&dsvHeapDesc, IID_PPV_ARGS(&m_dsvHeap)));

    D3D12_DEPTH_STENCIL_VIEW_DESC depthStencilDesc = {};
    depthStencilDesc.Format = DXGI_FORMAT_D32_FLOAT;
    depthStencilDesc.ViewDimension = D3D12_DSV_DIMENSION_TEXTURE2D;
    depthStencilDesc.Flags = D3D12_DSV_FLAG_NONE;

    CD3DX12_HEAP_PROPERTIES heapProps = CD3DX12_HEAP_PROPERTIES(D3D12_HEAP_TYPE_DEFAULT);
    CD3DX12_RESOURCE_DESC resourceDesc = CD3DX12_RESOURCE_DESC::Tex2D(DXGI_FORMAT_R32_TYPELESS, m_width, m_height, 1, 0, 1, 0, D3D12_RESOURCE_FLAG_ALLOW_DEPTH_STENCIL);

    D3D12_CLEAR_VALUE depthOptimizedClearValue = {};
    depthOptimizedClearValue.Format = DXGI_FORMAT_D32_FLOAT;
    depthOptimizedClearValue.DepthStencil.Depth = 1.0f;
    depthOptimizedClearValue.DepthStencil.Stencil = 0;

    ThrowIfFailed(m_device->CreateCommittedResource(
        &heapProps,
        D3D12_HEAP_FLAG_NONE,
        &resourceDesc,
        D3D12_RESOURCE_STATE_DEPTH_WRITE,
        &depthOptimizedClearValue,
        IID_PPV_ARGS(&m_dsvBuffer)
    ));

    D3D12_RESOURCE_DESC texDesc;
    ZeroMemory(&texDesc, sizeof(D3D12_RESOURCE_DESC));
    texDesc.Dimension = D3D12_RESOURCE_DIMENSION_TEXTURE2D;
    texDesc.Alignment = 0;
    texDesc.Width = m_width;
    texDesc.Height = m_height;
    texDesc.DepthOrArraySize = 1;
    texDesc.MipLevels = 1;
    texDesc.Format = DXGI_FORMAT_R32_TYPELESS;
    texDesc.SampleDesc.Count = 1;
    texDesc.SampleDesc.Quality = 0;
    texDesc.Layout = D3D12_TEXTURE_LAYOUT_UNKNOWN;
    texDesc.Flags = D3D12_RESOURCE_FLAG_ALLOW_DEPTH_STENCIL;

    ThrowIfFailed(m_device->CreateCommittedResource(
        &heapProps,
        D3D12_HEAP_FLAG_NONE,
        &texDesc,
        D3D12_RESOURCE_STATE_GENERIC_READ,
        &depthOptimizedClearValue,
        IID_PPV_ARGS(&m_lightDepthTexture)
    ));


    CD3DX12_CPU_DESCRIPTOR_HANDLE dsv(m_dsvHeap->GetCPUDescriptorHandleForHeapStart());
    m_device->CreateDepthStencilView(m_dsvBuffer.Get(), &depthStencilDesc, dsv);
    dsv.Offset(1, m_device->GetDescriptorHandleIncrementSize(D3D12_DESCRIPTOR_HEAP_TYPE_DSV));

    m_device->CreateDepthStencilView(m_lightDepthTexture.Get(), &depthStencilDesc, dsv);