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PODirect3D11(C++): Rendering (basic) question
 

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  1. PODirect3D11(C++): Rendering (basic) question
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    <p>I've been following a book about basics for game programming with D3D11. I now understand the absolute basics of Direct3D :)</p> <p>but... I have a question. In the book, I always had to make one demo at a time. Now, I'm trying to make a 2D game with it. Since I don't want to get used to bad habits so I need your advice.</p> <p>In the book, I always had to define a (struct VertexPos with texcoord and position members) OR (struct VertexPos with only a XMFLOAT3 position member). In the game I'm making, I want to be able to draw both solid surfaces without textures and surfaces with textures. I'm not sure how to do this, let alone do this efficiently.</p> <p>Here is my rendering function:</p> <pre><code>void GameSpriteDemo::Render() { if (m_pD3DContext == 0) {return;} float ClearColor[4] = {0.0f, 0.0f, 0.25f, 1.0f}; m_pD3DContext-&gt;ClearRenderTargetView(m_pBackBufferTarget,ClearColor); UINT stride = sizeof(VertexPos); UINT offset = 0; m_pD3DContext-&gt;IASetInputLayout(m_pInputLayout); m_pD3DContext-&gt;IASetVertexBuffers(0,1,&amp;m_pVertexBuffer, &amp;stride, &amp;offset); m_pD3DContext-&gt;IASetPrimitiveTopology(D3D11_PRIMITIVE_TOPOLOGY_TRIANGLELIST); m_pD3DContext-&gt;VSSetShader(m_pSolidColorVS,0,0); m_pD3DContext-&gt;PSSetShader(m_pSolidColorPS,0,0); m_pD3DContext-&gt;PSSetShaderResources(0,1,&amp;m_pColorMap); m_pD3DContext-&gt;PSSetSamplers(0,1,&amp;m_pColorMapSampler); for(int i=0; i &lt; 2; ++i) { XMMATRIX world = m_Sprites[i].GetWorldMatrix(); XMMATRIX mvp = XMMatrixMultiply( world, m_VpMatrix ); mvp = XMMatrixTranspose(mvp); m_pD3DContext-&gt;UpdateSubresource(m_pMvpCB,0,0,&amp;mvp,0,0); m_pD3DContext-&gt;VSSetConstantBuffers(0,1,&amp;m_pMvpCB); m_pD3DContext-&gt;Draw(6,0); } m_pSwapChain-&gt;Present(0,0); } </code></pre> <p>So, how should I handle this efficiently with multiple vertex buffers, input layouts, Shaders, Blenders, etc?</p> <p>Should I just create multiple versions of those, and then set reset the input assembly, shaders and such after the Draw call? Or does this not work/ is this not efficient?</p> <p>Thanks :)</p>
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    2. COI'd like to learn how to do this from start... would teach me a lot
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