DirectX9基础代码--灯光

//============================================================================= // Desc: 多光源示例程序 //============================================================================= #include <d3dx9.h> //----------------------------------------------------------------------------- // 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 //----------------------------------------------------------------------------- // Desc: 顶点结构 //----------------------------------------------------------------------------- struct CUSTOMVERTEX { D3DXVECTOR3 position; //顶点位置 D3DXVECTOR3 normal; //顶点法线 }; #define D3DFVF_CUSTOMVERTEX (D3DFVF_XYZ|D3DFVF_NORMAL) //----------------------------------------------------------------------------- // Desc: 设置变换矩阵 //----------------------------------------------------------------------------- VOID SetMatrices() { //建立并设置世界矩阵 D3DXMATRIX matWorld; D3DXMatrixIdentity( &matWorld ); g_pd3dDevice->SetTransform( D3DTS_WORLD, &matWorld ); //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: 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; d3dpp.EnableAutoDepthStencil = TRUE; d3dpp.AutoDepthStencilFormat = D3DFMT_D16; //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(正面和方面) g_pd3dDevice->SetRenderState( D3DRS_CULLMODE, D3DCULL_NONE ); //启用深度测试 g_pd3dDevice->SetRenderState( D3DRS_ZENABLE, TRUE ); //启用镜面反射光照模型 g_pd3dDevice->SetRenderState(D3DRS_SPECULARENABLE, TRUE); //设置变换矩阵 SetMatrices(); 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].normal = D3DXVECTOR3( sinf(theta), 0.0f, cosf(theta) ); pVertices[2*i+1].position = D3DXVECTOR3( sinf(theta), 1.0f, cosf(theta) ); pVertices[2*i+1].normal = D3DXVECTOR3( sinf(theta), 0.0f, cosf(theta) ); } g_pVB->Unlock(); return S_OK; } //----------------------------------------------------------------------------- // Desc: 设置材质和灯光 //----------------------------------------------------------------------------- VOID SetupLights() { //设置材料属性, 只反射红光分量和绿光分量, 整体上看该物体材料反射黄色光 D3DMATERIAL9 mtrl; ZeroMemory( &mtrl, sizeof(D3DMATERIAL9) ); mtrl.Ambient.r = 1.0f; mtrl.Ambient.g = 1.0f; mtrl.Ambient.b = 0.0f; mtrl.Ambient.a = 1.0f; mtrl.Diffuse.r = 1.0f; mtrl.Diffuse.g = 1.0f; mtrl.Diffuse.b = 0.0f; mtrl.Diffuse.a = 0.5f; mtrl.Specular.r = 1.0f; mtrl.Specular.g = 1.0f; mtrl.Specular.b = 0.0f; mtrl.Specular.a = 1.0f; g_pd3dDevice->SetMaterial( &mtrl ); //设置一号光源为方向光，颜色为绿色 .漫反射 D3DXVECTOR3 vecDir; D3DLIGHT9 light1; ZeroMemory( &light1, sizeof(D3DLIGHT9) ); light1.Type = D3DLIGHT_DIRECTIONAL; light1.Diffuse.r = 0.0f; light1.Diffuse.g = 1.0f; light1.Diffuse.b = 0.0f; vecDir = D3DXVECTOR3(-10, 0 ,10); //方向光方向 D3DXVec3Normalize( (D3DXVECTOR3*)&light1.Direction, &vecDir ); g_pd3dDevice->SetLight( 0, &light1 ); //二号光源为点光源，颜色为红色 D3DXVECTOR3 vecPos2; D3DLIGHT9 light2; ZeroMemory( &light2, sizeof(D3DLIGHT9) ); light2.Type = D3DLIGHT_POINT; light2.Diffuse.r = 1.0f; light2.Diffuse.g = 0.0f; light2.Diffuse.b = 0.0f; light2.Position= D3DXVECTOR3(10*sinf(timeGetTime()/350.0f) , 0, 10*cosf(timeGetTime()/350.0f) ); light2.Range = 100.0f; light2.Attenuation0 = 1.0f; g_pd3dDevice->SetLight( 1, &light2 ); //三号光源为方向光,颜色为绿色, *镜面反射* D3DXVECTOR3 vecDir3; D3DLIGHT9 light3; ZeroMemory( &light3, sizeof(D3DLIGHT9) ); light3.Type = D3DLIGHT_DIRECTIONAL; light3.Specular.r = 0.0f; light3.Specular.g = 1.0f; light3.Specular.b = 0.0f; light3.Specular.a = 1.0f; vecDir3 = D3DXVECTOR3(-10,0,10); D3DXVec3Normalize( (D3DXVECTOR3*)&light3.Direction, &vecDir3 ); g_pd3dDevice->SetLight( 2, &light3 ); //设置一定的环境光 g_pd3dDevice->SetRenderState( D3DRS_AMBIENT, 0x00505050); } //-------------------------------------------------------------- // Name: 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() { //清空后台缓冲区和深度缓冲区 g_pd3dDevice->Clear( 0, NULL, D3DCLEAR_TARGET|D3DCLEAR_ZBUFFER, 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() ) ) { //设置材料和灯光, 因为灯光属性不断变化,所以在此设置 SetupLights(); //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 ); //结束在后台缓冲区绘制图形 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 ); } //----------------------------------------------------------------------------- // D