为什么精灵渲染对象？

Question

我想在tutorial 这样的图片上渲染一个立方体。问题是它只渲染图片而立方体不渲染。你能帮助我吗 ？谢谢你

m_spriteBatch->Begin();
m_spriteBatch->Draw(m_background.Get(), m_fullscreenRect);

//
// Clear the back buffer
//
g_pImmediateContext->ClearRenderTargetView( g_pRenderTargetView, Colors::MidnightBlue );

g_pImmediateContext->ClearDepthStencilView(g_pDepthStencilView, D3D11_CLEAR_DEPTH, 1.0f, 0);

g_pImmediateContext->OMSetRenderTargets(1, &g_pRenderTargetView, g_pDepthStencilView);


//
// Update variables
//
ConstantBuffer cb;
cb.mWorld = XMMatrixTranspose( g_World );
cb.mView = XMMatrixTranspose( g_View );
cb.mProjection = XMMatrixTranspose( g_Projection );
g_pImmediateContext->UpdateSubresource( g_pConstantBuffer, 0, nullptr, &cb, 0, 0 );

//
// Renders a triangle
//
g_pImmediateContext->VSSetShader( g_pVertexShader, nullptr, 0 );
g_pImmediateContext->VSSetConstantBuffers( 0, 1, &g_pConstantBuffer );
g_pImmediateContext->PSSetShader( g_pPixelShader, nullptr, 0 );
g_pImmediateContext->DrawIndexed( 36, 0, 0 );        // 36 vertices needed for 12 triangles in a triangle list

//
// Present our back buffer to our front buffer
//
m_spriteBatch->End();
g_pSwapChain->Present( 0, 0 );

Answer 1

SpriteBatch 批量绘制以提高性能，因此它很可能在立方体绘制之后进行绘制。如果要确保先绘制精灵背景，则需要在提交立方体之前调用End。您还需要在设置渲染目标之后调用Begin：

// Clear
g_pImmediateContext->ClearDepthStencilView(g_pDepthStencilView, D3D11_CLEAR_DEPTH, 1.0f, 0);
g_pImmediateContext->OMSetRenderTargets(1, &g_pRenderTargetView, g_pDepthStencilView);

// Draw background image
m_spriteBatch->Begin();
m_spriteBatch->Draw(m_background.Get(), m_fullscreenRect);
m_spriteBatch->End();

// Draw objects
context->OMSetBlendState(…);
context->OMSetDepthStencilState(…);
context->IASetInputLayout(…);
context->IASetVertexBuffers(…);
context->IASetIndexBuffer(…);
context->IASetPrimitiveTopology(…);

如果m_background 纹理覆盖整个屏幕，您可以省略ClearRenderTargetView。

有关SpriteBatch 绘制顺序和批处理如何工作的更多信息，请参阅wiki。

Answer 2

基于@ChuckWalbourn 的answer，我解决了这个问题。

 g_pImmediateContext->ClearRenderTargetView( g_pRenderTargetView, Colors::MidnightBlue );


g_pImmediateContext->ClearDepthStencilView(g_pDepthStencilView, D3D11_CLEAR_DEPTH | 

D3D11_CLEAR_STENCIL, 1.0f, 0);


m_spriteBatch->Begin();
m_spriteBatch->Draw(m_background.Get(), m_fullscreenRect);
m_spriteBatch->End();

states = std::make_unique<CommonStates>(g_pd3dDevice);
g_pImmediateContext->OMSetBlendState(states->Opaque(), Colors::Black, 0xFFFFFFFF);
g_pImmediateContext->OMSetDepthStencilState(states->DepthDefault(), 0);
// Set the input layout
g_pImmediateContext->IASetInputLayout(g_pVertexLayout);
UINT stride = sizeof(SimpleVertex);
UINT offset = 0;
g_pImmediateContext->IASetVertexBuffers(0, 1, &g_pVertexBuffer, &stride, &offset);
// Set index buffer
g_pImmediateContext->IASetIndexBuffer(g_pIndexBuffer, DXGI_FORMAT_R16_UINT, 0);

// Set primitive topology
g_pImmediateContext->IASetPrimitiveTopology(D3D11_PRIMITIVE_TOPOLOGY_TRIANGLELIST);

// Draw objects