精通Direct3D图形与动画程序设计 04_第四章 顶点坐标变换.rar

//============================================================================= // Desc: 坐标变换 //============================================================================= #include <d3dx9.h> //D3DX实用库函数, 该头文件中又包含了d3d9.h头文件 //----------------------------------------------------------------------------- // Desc: 全局变量 //----------------------------------------------------------------------------- LPDIRECT3D9 g_pD3D = NULL; //Direct3D对象 LPDIRECT3DDEVICE9 g_pd3dDevice = NULL; //Direct3D设备对象 LPDIRECT3DVERTEXBUFFER9 g_pVB = NULL; //顶点缓冲区对象 HWND g_Wnd = NULL; //窗口句柄 D3DRECT g_ClentRect; //----------------------------------------------------------------------------- // Desc: 顶点结构 //----------------------------------------------------------------------------- struct CUSTOMVERTEX { D3DXVECTOR3 position; DWORD color; }; #define D3DFVF_CUSTOMVERTEX (D3DFVF_XYZ|D3DFVF_DIFFUSE) //----------------------------------------------------------------------------- // Desc: 设置世界矩阵 //----------------------------------------------------------------------------- VOID SetupWorldMatrice() { //建立一个绕X轴动态旋转的世界矩阵 D3DXMATRIX matWorld; UINT iTime = timeGetTime() % 1000; FLOAT fAngle = iTime * (2.0f * D3DX_PI) / 1000.0f; D3DXMatrixIdentity( &matWorld ); D3DXMatrixRotationX( &matWorld, fAngle ); //设置世界矩阵 g_pd3dDevice->SetTransform( D3DTS_WORLD, &matWorld ); } //----------------------------------------------------------------------------- // Desc: 设置观察矩阵和投影矩阵 //----------------------------------------------------------------------------- VOID SetupViewandProjMatrices() { //建立并设置观察矩阵 D3DXVECTOR3 vEyePt( 0.0f, 3.0f,-5.0f ); D3DXVECTOR3 vLookatPt( 0.0f, 0.0f, 0.0f ); D3DXVECTOR3 vUpVec( 0.0f, 1.0f, 0.0f ); D3DXMATRIX matView; D3DXMatrixLookAtLH( &matView, &vEyePt, &vLookatPt, &vUpVec ); g_pd3dDevice->SetTransform( D3DTS_VIEW, &matView ); //建立并设置投影矩阵 D3DXMATRIX matProj; D3DXMatrixPerspectiveFovLH( &matProj, D3DX_PI/4, 1.0f, 1.0f, 100.0f ); g_pd3dDevice->SetTransform( D3DTS_PROJECTION, &matProj ); } //----------------------------------------------------------------------------- // Desc: 设置视区 //----------------------------------------------------------------------------- VOID SetupViewPort() { RECT rect; GetClientRect(g_Wnd,&rect); D3DVIEWPORT9 vp; vp.X = 0; vp.Y = 0; vp.Width = rect.right; vp.Height = rect.bottom; vp.MinZ = 0.0f; vp.MaxZ = 1.0f; g_pd3dDevice->SetViewport(&vp); } //----------------------------------------------------------------------------- // Desc: 初始化Direct3D //----------------------------------------------------------------------------- HRESULT InitD3D( HWND hWnd ) { //创建Direct3D对象, 该对象用于创建Direct3D设备对象 if( NULL == ( g_pD3D = Direct3DCreate9( D3D_SDK_VERSION ) ) ) return E_FAIL; //设置D3DPRESENT_PARAMETERS结构, 准备创建Direct3D设备对象 D3DPRESENT_PARAMETERS d3dpp; ZeroMemory( &d3dpp, sizeof(d3dpp) ); d3dpp.Windowed = TRUE; d3dpp.SwapEffect = D3DSWAPEFFECT_DISCARD; d3dpp.BackBufferFormat = D3DFMT_UNKNOWN; //创建Direct3D设备对象 if( FAILED( g_pD3D->CreateDevice( D3DADAPTER_DEFAULT, D3DDEVTYPE_HAL, hWnd, D3DCREATE_SOFTWARE_VERTEXPROCESSING, &d3dpp, &g_pd3dDevice ) ) ) { return E_FAIL; } //设置剔出模式为不剔出任何面(正面和反面) g_pd3dDevice->SetRenderState( D3DRS_CULLMODE, D3DCULL_NONE ); //关闭光照处理, 默认情况下启用光照处理 g_pd3dDevice->SetRenderState( D3DRS_LIGHTING, FALSE ); //设置观察和投影矩阵 SetupViewandProjMatrices(); //设置视区 SetupViewPort(); return S_OK; } //----------------------------------------------------------------------------- // Desc: 创建场景图形 //----------------------------------------------------------------------------- HRESULT InitGeometry() { //创顶点缓冲区 if( FAILED( g_pd3dDevice->CreateVertexBuffer( 50*2*sizeof(CUSTOMVERTEX), 0, D3DFVF_CUSTOMVERTEX, D3DPOOL_DEFAULT, &g_pVB, NULL ) ) ) { return E_FAIL; } //填充顶点缓冲区 CUSTOMVERTEX* pVertices; if( FAILED( g_pVB->Lock( 0, 0, (void**)&pVertices, 0 ) ) ) return E_FAIL; for( DWORD i=0; i<50; i++ ) { FLOAT theta = (2*D3DX_PI*i)/(50-1); pVertices[2*i+0].position = D3DXVECTOR3( sinf(theta),-1.0f, cosf(theta) ); pVertices[2*i+0].color =0xffffff00; pVertices[2*i+1].position = D3DXVECTOR3( sinf(theta), 1.0f, cosf(theta) ); pVertices[2*i+1].color =0xffffff00; } g_pVB->Unlock(); return S_OK; } //----------------------------------------------------------------------------- // Desc: 释放创建的对象 //----------------------------------------------------------------------------- VOID Cleanup() { //释放顶点缓冲区对象 if( g_pVB != NULL ) g_pVB->Release(); //释放Direct3D设备对象 if( g_pd3dDevice != NULL ) g_pd3dDevice->Release(); //释放Direct3D对象 if( g_pD3D != NULL ) g_pD3D->Release(); } //----------------------------------------------------------------------------- // Desc: 渲染图形 //----------------------------------------------------------------------------- VOID Render() { //清空后台缓冲区 g_pd3dDevice->Clear( 0, NULL, D3DCLEAR_TARGET, D3DCOLOR_XRGB(45, 50, 170), 1.0f, 0 ); //开始在后台缓冲区绘制图形 if( SUCCEEDED( g_pd3dDevice->BeginScene() ) ) { //设置世界矩阵 SetupWorldMatrice(); //在后台缓冲区绘制图形 g_pd3dDevice->SetStreamSource( 0, g_pVB, 0, sizeof(CUSTOMVERTEX) ); g_pd3dDevice->SetFVF( D3DFVF_CUSTOMVERTEX ); g_pd3dDevice->DrawPrimitive( D3DPT_TRIANGLESTRIP, 0, 2*50-2 ); //结束在后台缓冲区渲染图形 g_pd3dDevice->EndScene(); } //将在后台缓冲区绘制的图形提交到前台缓冲区显示 g_pd3dDevice->Present( NULL, NULL, NULL, NULL ); } //----------------------------------------------------------------------------- // Desc: 消息处理 //----------------------------------------------------------------------------- LRESULT WINAPI MsgProc( HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam ) { switch( msg ) { case WM_DESTROY: Cleanup(); PostQuitMessage( 0 ); return 0; } return DefWindowProc( hWnd, msg, wParam, lParam ); } //----------------------------------------------------------------------------- // Desc: 入口函数 //----------------------------------------------------------------------------- INT WINAPI WinMain( HINSTANCE hInst, HINSTANCE, LPSTR, INT ) { //注册窗口类 WNDCLASSEX wc = { sizeof(WNDCLASSEX), CS_CLASSDC , MsgProc, 0L, 0L, GetModuleHandle(NULL), NULL, NULL, NULL, NULL, L"ClassName", NULL }; RegisterClassEx( &wc ); //创建窗口 HWND hWnd = CreateWindow( L"ClassName", L"坐标变换", WS_OVERLAPPEDWINDOW, 200, 100, 500,500, GetDesktopWindow(), NULL, wc.hInstance, NULL ); g_Wnd=hWnd; //初始化Direct3D if( SUCCEEDED( InitD3D( hWnd ) ) ) { //创建场景图形 if( SUCCEEDED( InitGeometry() ) ) { //显示窗口 ShowWindow( hWnd, SW_SHOWDEFAULT ); UpdateWindow( hWnd ); //进入消息循环 MSG msg; ZeroMemory( &msg, sizeof(msg) ); while( msg.message!=WM_QUIT ) { if( PeekMessage( &msg, NULL, 0U, 0U, PM_REMOVE ) ) {