第十章 DiffuseCubeDemo核心代码

DiffuseCubeDemo.cpp

//=============================================================================// DiffuseCubeDemo.cpp by Frank Luna (C) 2005 All Rights Reserved.//// Demonstrates diffuse lighting and manually specifying the vertex// and vertex normal data.//// Controls: Use mouse to orbit and zoom; use the 'W' and 'S' keys to //           alter the height of the camera.//=============================================================================#include "d3dApp.h"#include "DirectInput.h"#include <crtdbg.h>#include "GfxStats.h"#include <list>#include "Vertex.h"class DiffuseCubeDemo : public D3DApp{public:DiffuseCubeDemo(HINSTANCE hInstance, std::string winCaption, D3DDEVTYPE devType, DWORD requestedVP);~DiffuseCubeDemo();bool checkDeviceCaps();void onLostDevice();void onResetDevice();void updateScene(float dt);void drawScene();// Helper methodsvoid buildVertexBuffer();void buildIndexBuffer();void buildFX();void buildViewMtx();void buildProjMtx();private:GfxStats* mGfxStats;IDirect3DVertexBuffer9* mVB;IDirect3DIndexBuffer9*  mIB;ID3DXEffect*            mFX;D3DXHANDLE              mhTech;D3DXHANDLE              mhWVP;D3DXHANDLE              mhWorldInverseTranspose;D3DXHANDLE              mhLightVecW;D3DXHANDLE              mhDiffuseMtrl;D3DXHANDLE              mhDiffuseLight;D3DXVECTOR3 mLightVecW;D3DXCOLOR   mDiffuseMtrl;D3DXCOLOR   mDiffuseLight;float mCameraRotationY;float mCameraRadius;float mCameraHeight;D3DXMATRIX mWorld;D3DXMATRIX mView;D3DXMATRIX mProj;};int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE prevInstance,   PSTR cmdLine, int showCmd){// Enable run-time memory check for debug builds.#if defined(DEBUG) | defined(_DEBUG)_CrtSetDbgFlag( _CRTDBG_ALLOC_MEM_DF | _CRTDBG_LEAK_CHECK_DF );#endifDiffuseCubeDemo app(hInstance, "Diffuse Cube Demo", D3DDEVTYPE_HAL, D3DCREATE_HARDWARE_VERTEXPROCESSING);gd3dApp = &app;DirectInput di(DISCL_NONEXCLUSIVE|DISCL_FOREGROUND, DISCL_NONEXCLUSIVE|DISCL_FOREGROUND);gDInput = &di;    return gd3dApp->run();}DiffuseCubeDemo::DiffuseCubeDemo(HINSTANCE hInstance, std::string winCaption, D3DDEVTYPE devType, DWORD requestedVP): D3DApp(hInstance, winCaption, devType, requestedVP){if(!checkDeviceCaps()){MessageBox(0, "checkDeviceCaps() Failed", 0, 0);PostQuitMessage(0);}mGfxStats = new GfxStats();mCameraRadius    = 10.0f;mCameraRotationY = 1.2 * D3DX_PI;mCameraHeight    = 5.0f;mLightVecW    = D3DXVECTOR3(-0.5, 0.75f, -2.0f);D3DXVec3Normalize(&mLightVecW, &mLightVecW);mDiffuseMtrl  = D3DXCOLOR(0.0f, 0.0f, 1.0f, 1.0f);mDiffuseLight = D3DXCOLOR(1.0f, 1.0f, 1.0f, 1.0f);D3DXMatrixIdentity(&mWorld);buildVertexBuffer();buildIndexBuffer();buildFX();onResetDevice();InitAllVertexDeclarations();}DiffuseCubeDemo::~DiffuseCubeDemo(){delete mGfxStats;ReleaseCOM(mVB);ReleaseCOM(mIB);ReleaseCOM(mFX);DestroyAllVertexDeclarations();}bool DiffuseCubeDemo::checkDeviceCaps(){D3DCAPS9 caps;HR(gd3dDevice->GetDeviceCaps(&caps));// Check for vertex shader version 2.0 support.if( caps.VertexShaderVersion < D3DVS_VERSION(2, 0) )return false;// Check for pixel shader version 2.0 support.if( caps.PixelShaderVersion < D3DPS_VERSION(2, 0) )return false;return true;}void DiffuseCubeDemo::onLostDevice(){mGfxStats->onLostDevice();HR(mFX->OnLostDevice());}void DiffuseCubeDemo::onResetDevice(){mGfxStats->onResetDevice();HR(mFX->OnResetDevice());// The aspect ratio depends on the backbuffer dimensions, which can // possibly change after a reset.  So rebuild the projection matrix.buildProjMtx();}void DiffuseCubeDemo::updateScene(float dt){mGfxStats->setVertexCount(24);mGfxStats->setTriCount(12);mGfxStats->update(dt);// Get snapshot of input devices.gDInput->poll();// Check input.if( gDInput->keyDown(DIK_W) ) mCameraHeight   += 25.0f * dt;if( gDInput->keyDown(DIK_S) ) mCameraHeight   -= 25.0f * dt;// Divide by 50 to make mouse less sensitive. mCameraRotationY += gDInput->mouseDX() / 100.0f;mCameraRadius    += gDInput->mouseDY() / 25.0f;// If we rotate over 360 degrees, just roll back to 0if( fabsf(mCameraRotationY) >= 2.0f * D3DX_PI ) mCameraRotationY = 0.0f;// Don't let radius get too small.if( mCameraRadius < 5.0f )mCameraRadius = 5.0f;// The camera position/orientation relative to world space can // change every frame based on input, so we need to rebuild the// view matrix every frame with the latest changes.buildViewMtx();}void DiffuseCubeDemo::drawScene(){// Clear the backbuffer and depth buffer.HR(gd3dDevice->Clear(0, 0, D3DCLEAR_TARGET | D3DCLEAR_ZBUFFER, 0xffeeeeee, 1.0f, 0));HR(gd3dDevice->BeginScene());// Let Direct3D know the vertex buffer, index buffer and vertex // declaration we are using.HR(gd3dDevice->SetStreamSource(0, mVB, 0, sizeof(VertexPN)));HR(gd3dDevice->SetIndices(mIB));HR(gd3dDevice->SetVertexDeclaration(VertexPN::Decl));// Setup the rendering FXHR(mFX->SetTechnique(mhTech));HR(mFX->SetMatrix(mhWVP, &(mWorld*mView*mProj)));D3DXMATRIX worldInverseTranspose;D3DXMatrixInverse(&worldInverseTranspose, 0, &mWorld);D3DXMatrixTranspose(&worldInverseTranspose, &worldInverseTranspose);HR(mFX->SetMatrix(mhWorldInverseTranspose, &worldInverseTranspose));HR(mFX->SetValue(mhLightVecW, &mLightVecW, sizeof(D3DXVECTOR3)));HR(mFX->SetValue(mhDiffuseMtrl, &mDiffuseMtrl, sizeof(D3DXCOLOR)));HR(mFX->SetValue(mhDiffuseLight, &mDiffuseLight, sizeof(D3DXCOLOR)));// Begin passes.UINT numPasses = 0;HR(mFX->Begin(&numPasses, 0));for(UINT i = 0; i < numPasses; ++i){HR(mFX->BeginPass(i));HR(gd3dDevice->DrawIndexedPrimitive(D3DPT_TRIANGLELIST, 0, 0, 8, 0, 12));HR(mFX->EndPass());}HR(mFX->End());mGfxStats->display();HR(gd3dDevice->EndScene());// Present the backbuffer.HR(gd3dDevice->Present(0, 0, 0, 0));}void DiffuseCubeDemo::buildVertexBuffer(){// Obtain a pointer to a new vertex buffer.HR(gd3dDevice->CreateVertexBuffer(24 * sizeof(VertexPN), D3DUSAGE_WRITEONLY,0, D3DPOOL_MANAGED, &mVB, 0));// Now lock it to obtain a pointer to its internal data, and write the// cube's vertex data.// NOTE: One key point to note is that with normals, we no longer have eight// unique vertices for the cube.  This is because, even though the vertices // share spatial data, they do not share normal data.  VertexPN* v = 0;HR(mVB->Lock(0, 0, (void**)&v, 0));// fill in the front face vertex datav[0] = VertexPN(-1.0f, -1.0f, -1.0f, 0.0f, 0.0f, -1.0f);v[1] = VertexPN(-1.0f,  1.0f, -1.0f, 0.0f, 0.0f, -1.0f);v[2] = VertexPN( 1.0f,  1.0f, -1.0f, 0.0f, 0.0f, -1.0f);v[3] = VertexPN( 1.0f, -1.0f, -1.0f, 0.0f, 0.0f, -1.0f);// fill in the back face vertex datav[4] = VertexPN(-1.0f, -1.0f, 1.0f, 0.0f, 0.0f, 1.0f);v[5] = VertexPN( 1.0f, -1.0f, 1.0f, 0.0f, 0.0f, 1.0f);v[6] = VertexPN( 1.0f,  1.0f, 1.0f, 0.0f, 0.0f, 1.0f);v[7] = VertexPN(-1.0f,  1.0f, 1.0f, 0.0f, 0.0f, 1.0f);// fill in the top face vertex datav[8]  = VertexPN(-1.0f, 1.0f, -1.0f, 0.0f, 1.0f, 0.0f);v[9]  = VertexPN(-1.0f, 1.0f,  1.0f, 0.0f, 1.0f, 0.0f);v[10] = VertexPN( 1.0f, 1.0f,  1.0f, 0.0f, 1.0f, 0.0f);v[11] = VertexPN( 1.0f, 1.0f, -1.0f, 0.0f, 1.0f, 0.0f);// fill in the bottom face vertex datav[12] = VertexPN(-1.0f, -1.0f, -1.0f, 0.0f, -1.0f, 0.0f);v[13] = VertexPN( 1.0f, -1.0f, -1.0f, 0.0f, -1.0f, 0.0f);v[14] = VertexPN( 1.0f, -1.0f,  1.0f, 0.0f, -1.0f, 0.0f);v[15] = VertexPN(-1.0f, -1.0f,  1.0f, 0.0f, -1.0f, 0.0f);// fill in the left face vertex datav[16] = VertexPN(-1.0f, -1.0f,  1.0f, -1.0f, 0.0f, 0.0f);v[17] = VertexPN(-1.0f,  1.0f,  1.0f, -1.0f, 0.0f, 0.0f);v[18] = VertexPN(-1.0f,  1.0f, -1.0f, -1.0f, 0.0f, 0.0f);v[19] = VertexPN(-1.0f, -1.0f, -1.0f, -1.0f, 0.0f, 0.0f);// fill in the right face vertex datav[20] = VertexPN( 1.0f, -1.0f, -1.0f, 1.0f, 0.0f, 0.0f);v[21] = VertexPN( 1.0f,  1.0f, -1.0f, 1.0f, 0.0f, 0.0f);v[22] = VertexPN( 1.0f,  1.0f,  1.0f, 1.0f, 0.0f, 0.0f);v[23] = VertexPN( 1.0f, -1.0f,  1.0f, 1.0f, 0.0f, 0.0f);HR(mVB->Unlock());}void DiffuseCubeDemo::buildIndexBuffer(){// Obtain a pointer to a new index buffer.HR(gd3dDevice->CreateIndexBuffer(36 * sizeof(WORD), D3DUSAGE_WRITEONLY,D3DFMT_INDEX16, D3DPOOL_MANAGED, &mIB, 0));// Now lock it to obtain a pointer to its internal data, and write the// cube's index data.WORD* k = 0;HR(mIB->Lock(0, 0, (void**)&k, 0));// fill in the front face index datak[0] = 0; k[1] = 1; k[2] = 2;k[3] = 0; k[4] = 2; k[5] = 3;// fill in the back face index datak[6] = 4; k[7]  = 5; k[8]  = 6;k[9] = 4; k[10] = 6; k[11] = 7;// fill in the top face index datak[12] = 8; k[13] =  9; k[14] = 10;k[15] = 8; k[16] = 10; k[17] = 11;// fill in the bottom face index datak[18] = 12; k[19] = 13; k[20] = 14;k[21] = 12; k[22] = 14; k[23] = 15;// fill in the left face index datak[24] = 16; k[25] = 17; k[26] = 18;k[27] = 16; k[28] = 18; k[29] = 19;// fill in the right face index datak[30] = 20; k[31] = 21; k[32] = 22;k[33] = 20; k[34] = 22; k[35] = 23;HR(mIB->Unlock());}void DiffuseCubeDemo::buildFX(){// Create the FX from a .fx file.ID3DXBuffer* errors = 0;HR(D3DXCreateEffectFromFile(gd3dDevice, "diffuse.fx", 0, 0, D3DXSHADER_DEBUG, 0, &mFX, &errors));if( errors )MessageBox(0, (char*)errors->GetBufferPointer(), 0, 0);// Obtain handles.mhTech                  = mFX->GetTechniqueByName("DiffuseTech");mhWVP                   = mFX->GetParameterByName(0, "gWVP");mhWorldInverseTranspose = mFX->GetParameterByName(0, "gWorldInverseTranspose");mhLightVecW             = mFX->GetParameterByName(0, "gLightVecW");mhDiffuseMtrl           = mFX->GetParameterByName(0, "gDiffuseMtrl");mhDiffuseLight          = mFX->GetParameterByName(0, "gDiffuseLight");}void DiffuseCubeDemo::buildViewMtx(){float x = mCameraRadius * cosf(mCameraRotationY);float z = mCameraRadius * sinf(mCameraRotationY);D3DXVECTOR3 pos(x, mCameraHeight, z);D3DXVECTOR3 target(0.0f, 0.0f, 0.0f);D3DXVECTOR3 up(0.0f, 1.0f, 0.0f);D3DXMatrixLookAtLH(&mView, &pos, &target, &up);}void DiffuseCubeDemo::buildProjMtx(){float w = (float)md3dPP.BackBufferWidth;float h = (float)md3dPP.BackBufferHeight;D3DXMatrixPerspectiveFovLH(&mProj, D3DX_PI * 0.25f, w/h, 1.0f, 5000.0f);}

 

 

diffuse.fx

//=============================================================================// diffuse.fx by Frank Luna (C) 2004 All Rights Reserved.//// Does basic diffuse lighting.//=============================================================================uniform extern float4x4 gWorldInverseTranspose;uniform extern float4x4 gWVP;uniform extern float4 gDiffuseMtrl;uniform extern float4 gDiffuseLight;uniform extern float3 gLightVecW; struct OutputVS{    float4 posH  : POSITION0;    float4 color : COLOR0;};OutputVS DiffuseVS(float3 posL : POSITION0, float3 normalL : NORMAL0){    // Zero out our output.OutputVS outVS = (OutputVS)0;// Transform normal to world space.float3 normalW = mul(float4(normalL, 0.0f), gWorldInverseTranspose).xyz;normalW = normalize(normalW);// Compute the color: Equation 10.1.float s = max(dot(gLightVecW, normalW), 0.0f);outVS.color.rgb = s*(gDiffuseMtrl*gDiffuseLight).rgb;outVS.color.a   = gDiffuseMtrl.a;// Transform to homogeneous clip space.outVS.posH = mul(float4(posL, 1.0f), gWVP);// Done--return the output.    return outVS;}float4 DiffusePS(float4 c : COLOR0) : COLOR{    return c;}technique DiffuseTech{    pass P0    {        // Specify the vertex and pixel shader associated with this pass.        vertexShader = compile vs_2_0 DiffuseVS();        pixelShader  = compile ps_2_0 DiffusePS();    }}