这里不再介绍effect框架的具体使用，有关effect框架使用可参考

 

实现的功能依然是画一个简单的三角形，只不过使用了effect框架。

为了体现使用effect框架方便变量绑定的优点，我们对着色器代码做了修改，增加了一个常量float4x4 gWorldViewProj

cbuffer cbPerObject{    float4x4 gWorldViewProj; };float4 VS_Main( float4 pos : POSITION ) : SV_POSITION    {        pos = mul(pos,gWorldViewProj);    return pos;    }    float4 PS_Main( float4 pos : SV_POSITION ) : SV_TARGET    {        return float4( 1.0f, 0.0f, 0.0f, 1.0f );    } technique11 ColorTech{    pass P0    {        SetVertexShader( CompileShader( vs_5_0, VS_Main() ) );        SetGeometryShader( NULL );        SetPixelShader( CompileShader( ps_5_0, PS_Main() ) );    }}

 

由于代码很简单，这里不再给出解释，直接看代码吧！

下面是修改后的TriangleDemo.h

1 #pragma once 2  3 #include "Dx11DemoBase.h" 4 #include "d3dx11effect.h" 5  6 class TriangleDemo : public Dx11DemoBase 7 { 8 public: 9     TriangleDemo();10     ~TriangleDemo();11 12     bool LoadContent() override;13     void UnLoadContent() override;14 15     void Update(float dt) override;16     void Render() override;17 18 private:19     ID3D11Buffer *m_pVertexBuffer;20     ID3D11InputLayout *m_pInputLayout;21 22     ID3DX11Effect *m_pFx;23     ID3DX11EffectTechnique *m_pTechnique;24     ID3DX11EffectMatrixVariable *m_pFxWorldViewProj;25     XMFLOAT4X4 m_world;26     XMFLOAT4X4 m_view;27     XMFLOAT4X4 m_proj;28 29 };

 

TriangleDemo.cpp

1 #include "TriangleDemo.h"  2   3   4 struct VertexPos  5 {  6     XMFLOAT3 pos;  7 };  8   9 TriangleDemo::TriangleDemo()  10 : m_pInputLayout(0), m_pVertexBuffer(0) 11 { 12     XMMATRIX I = XMMatrixIdentity(); 13     XMStoreFloat4x4(&m_world, I); 14     XMStoreFloat4x4(&m_view, I); 15     XMStoreFloat4x4(&m_proj, I); 16 } 17  18  19 TriangleDemo::~TriangleDemo() 20 { 21 } 22  23 void TriangleDemo::UnLoadContent() 24 { 25     if (m_pVertexBuffer) 26         m_pVertexBuffer->Release(); 27     if (m_pInputLayout) 28         m_pInputLayout->Release(); 29     if (m_pFx) 30         m_pFx->Release(); 31     m_pVertexBuffer = 0; 32     m_pInputLayout = 0; 33     m_pFx = 0; 34 } 35  36 bool TriangleDemo::LoadContent() 37 { 38     HRESULT result; 39     VertexPos vertices[] = 40     { 41         XMFLOAT3(0.5f, 0.5f, 0.5f), 42         XMFLOAT3(0.5f, -0.5f, 0.5f), 43         XMFLOAT3(-0.5f, -0.5f, 0.5f) 44     }; 45  46     D3D11_BUFFER_DESC vertexDesc; 47     ZeroMemory(&vertexDesc, sizeof(vertexDesc)); 48     vertexDesc.Usage = D3D11_USAGE_DEFAULT; 49     vertexDesc.BindFlags = D3D11_BIND_VERTEX_BUFFER; 50     vertexDesc.ByteWidth = sizeof(VertexPos)* 3; 51  52     D3D11_SUBRESOURCE_DATA resourceData; 53     ZeroMemory(&resourceData, sizeof(resourceData)); 54     resourceData.pSysMem = vertices; 55  56     result = m_pd3dDevice->CreateBuffer(&vertexDesc, &resourceData, &m_pVertexBuffer); 57     if (FAILED(result)) 58     { 59         return false; 60     } 61  62  63     DWORD shaderFlags = D3DCOMPILE_ENABLE_STRICTNESS; 64 #if defined _DEBUG || defined DEBUG 65     shaderFlags = D3DCOMPILE_DEBUG; 66 #endif 67  68     ID3D10Blob *compiledShader = 0; 69     ID3D10Blob *compilationMsgs = 0; 70     result = D3DX11CompileFromFile("SolidColor.fx", 0, 0, 0, "fx_5_0", shaderFlags, 71         0, 0, &compiledShader, &compilationMsgs, 0); 72     if (compilationMsgs != 0) 73     { 74         MessageBox(0, (char*)compilationMsgs->GetBufferPointer(), 0, 0); 75         compilationMsgs->Release(); 76         compilationMsgs = 0; 77     } 78     if (FAILED(result)) 79     { 80         MessageBox(0, "载入着色器错误", 0, 0); 81         return false; 82     } 83  84     result = D3DX11CreateEffectFromMemory(compiledShader->GetBufferPointer(), compiledShader->GetBufferSize(), 85         0, m_pd3dDevice, &m_pFx); 86     compiledShader->Release(); 87     if (FAILED(result)) 88     { 89         MessageBox(0, "载入着色器失败", 0, 0); 90         return false; 91     } 92     m_pTechnique = m_pFx->GetTechniqueByName("ColorTech"); 93     m_pFxWorldViewProj = m_pFx->GetVariableByName("gWorldViewProj")->AsMatrix(); 94      95     D3D11_INPUT_ELEMENT_DESC solidColorLayout[] = 96     { 97         { "POSITION", 0, DXGI_FORMAT_R32G32B32_FLOAT, 0, 0, D3D11_INPUT_PER_VERTEX_DATA, 0 } 98     }; 99     UINT numLayoutElements = ARRAYSIZE(solidColorLayout);100     D3DX11_PASS_DESC passDesc;101     m_pTechnique->GetPassByIndex(0)->GetDesc(&passDesc);102 103     result = m_pd3dDevice->CreateInputLayout(solidColorLayout, numLayoutElements, passDesc.pIAInputSignature,104         passDesc.IAInputSignatureSize, &m_pInputLayout);105     106     return true;107 }108 109 110 111 void TriangleDemo::Update(float dt)112 {113 114 }115 116 void TriangleDemo::Render()117 {118     if (m_pImmediateContext == 0)119         return;120     //清除渲染目标视图121     float clearColor[4] = { 0.5f, 0.5f, 0.5f, 1.0f };//背景颜色122     m_pImmediateContext->ClearRenderTargetView(m_pRenderTargetView, clearColor);123 124     UINT stride = sizeof(VertexPos);125     UINT offset = 0;126     //设置数据信息格式控制信息127     m_pImmediateContext->IASetInputLayout(m_pInputLayout);128     //设置要绘制的几何体信息129     m_pImmediateContext->IASetVertexBuffers(0,1,&m_pVertexBuffer,&stride,&offset);130     //指明如何绘制三角形131     m_pImmediateContext->IASetPrimitiveTopology(D3D11_PRIMITIVE_TOPOLOGY_TRIANGLELIST);132 133     //设置常量 134     XMMATRIX world = XMLoadFloat4x4(&m_world);135     XMMATRIX view = XMLoadFloat4x4(&m_view);136     XMMATRIX proj = XMLoadFloat4x4(&m_proj);137     XMMATRIX worldViewProj = world*view*proj;138     m_pFxWorldViewProj->SetMatrix(reinterpret_cast
     
      (&worldViewProj));139 140     D3DX11_TECHNIQUE_DESC techDesc;141     m_pTechnique->GetDesc(&techDesc);142     for (UINT i = 0; i < techDesc.Passes; ++i)143     {144         m_pTechnique->GetPassByIndex(i)->Apply(0, m_pImmediateContext);145         m_pImmediateContext->Draw(3, 0);146     }147     //马上输出148     m_pSwapChain->Present(0, 0);149 }
     

运行结果同之前的一样，不再贴图了