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          EEPW首頁(yè) > 嵌入式系統(tǒng) > 設(shè)計(jì)應(yīng)用 > WinCE OpenGL繪制立方體和紋理貼圖

          WinCE OpenGL繪制立方體和紋理貼圖

          作者: 時(shí)間:2016-10-08 來(lái)源:網(wǎng)絡(luò) 收藏

          { PAINTSTRUCT ps;HDC hdc;

          switch (message)

          { case WM_CREATE:break;case WM_PAINT:hdc = BeginPaint(hWnd, ps);

          // TODO: 在此添加任意繪圖代碼……

          EndPaint(hWnd, ps);break;case WM_DESTROY:{ Clean();PostQuitMessage(0);} break;

          default:return DefWindowProc(hWnd, message, wParam, lParam);} return 0;}

          BOOL InitOGLES(HWND hWnd)

          { EGLint matchingConfigs;EGLint majorVersion = 0;EGLint minorVersion = 0;

          glesDisplay = eglGetDisplay(GetDC(hWnd)); //Ask for an available display if( glesDisplay == EGL_NO_DISPLAY || eglGetError() != EGL_SUCCESS )

          return FALSE;

          EGLConfig *configs_list;EGLint num_configs;// Display initialization (we don't care about the OGLES version numbers)

          if( eglInitialize( glesDisplay, majorVersion, minorVersion) == EGL_FALSE)

          { printf(eglInitialize failed, eglGetError = 0x%04xn,eglGetError());return FALSE;} // find out how many configurations are supported if ( eglGetConfigs( glesDisplay, NULL, 0, num_configs)==EGL_FALSE || eglGetError() != EGL_SUCCESS )

          return FALSE;configs_list = (EGLConfig*) malloc(num_configs * sizeof(EGLConfig));if (configs_list == NULL)

          return FALSE;// Get Configurations if( eglGetConfigs( glesDisplay, configs_list, num_configs, num_configs)== EGL_FALSE || eglGetError() != EGL_SUCCESS )

          return FALSE;// Obtain the first configuration with a depth buffer of 16 bits EGLint attrs[] = { EGL_RED_SIZE, 5,EGL_GREEN_SIZE, 6,EGL_BLUE_SIZE, 5,EGL_DEPTH_SIZE, 16,EGL_NONE };if (!eglChooseConfig(glesDisplay, attrs, configs_list, num_configs, matchingConfigs))

          { return eglGetError();} // If there isn't any configuration enough good if (matchingConfigs 1)

          return FALSE;/*eglCreateWindowSurface creates an onscreen EGLSurface and returns a handle to it. Any EGL rendering context created with a compatible EGLConfig can be used to render into this surface.*/ glesSurface = eglCreateWindowSurface(glesDisplay, configs_list[0], hWnd, 0);if(!glesSurface)

          return FALSE;

          // Let's create our rendering context glesContext=eglCreateContext(glesDisplay, configs_list[0], 0, 0);if(!glesContext)

          return FALSE;//Now we will activate the context for rendering eglMakeCurrent(glesDisplay, glesSurface, glesSurface, glesContext);

          /*Remember: because we are programming for a mobile device, we cant use any of the OpenGL ES functions that finish in 'f', we must use the fixed point version (they finish in 'x'*/ glClearColorx(0, 0, 0, 0);glShadeModel(GL_SMOOTH);

          RECT rc;GetWindowRect(hWnd, rc);UINT width = rc.right - rc.left;UINT height = rc.bottom - rc.top;// 設(shè)置OpenGL場(chǎng)景的大小glViewport(rc.left, rc.top, width, height);

          // 設(shè)置投影矩陣glMatrixMode(GL_PROJECTION);glLoadIdentity();

          // 投影變換(透視投影)

          float ratio = (float) width / height;glFrustumf(-ratio, ratio, -1, 1, 2, 10);//glOrthox(FixedFromInt(-50),F(xiàn)ixedFromInt(50), FixedFromInt(-50), FixedFromInt(50), FixedFromInt(-50), FixedFromInt(50));

          // 選擇模型觀察矩陣glMatrixMode(GL_MODELVIEW);// 重置模型觀察矩陣glLoadIdentity();

          return TRUE;}

          void CreateSurface()

          { glDisable(GL_DITHER);

          // 告訴系統(tǒng)對(duì)透視進(jìn)行修正glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_FASTEST);// 黑色背景glClearColor(0, 0, 0, 0);

          // 啟用陰影平滑glShadeModel(GL_SMOOTH);

          // 設(shè)置深度緩存glClearDepthf(1.0f);// 啟用深度測(cè)試glEnable(GL_DEPTH_TEST);// 所作深度測(cè)試的類型glDepthFunc(GL_LEQUAL);

          // 啟用2D紋理glEnable(GL_TEXTURE_2D);// 加載紋理LoadTexture(_T(\NAND2\OpenGlRes\1.png),texture[0]);LoadTexture(_T(\NAND2\OpenGlRes\1.png),texture[1]);LoadTexture(_T(\NAND2\OpenGlRes\1.png),texture[2]);LoadTexture(_T(\NAND2\OpenGlRes\1.png),texture[3]);LoadTexture(_T(\NAND2\OpenGlRes\1.png),texture[4]);LoadTexture(_T(\NAND2\OpenGlRes\1.png),texture[5]);}

          void Render()

          { static float rotation = 0;// 清除屏幕和深度緩存glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

          glMatrixMode(GL_MODELVIEW);// 重置當(dāng)前的模型觀察矩陣glLoadIdentity();

          // 坐標(biāo)變換glTranslatef(0.0f, 0.0f, -5.0f);

          // 設(shè)置旋轉(zhuǎn)glRotatef(rotation++, 0.0f, 1.0f, 0.0f);glRotatef(rotation++, 1.0f, 0.0f, 0.0f);

          glEnableClientState(GL_VERTEX_ARRAY);glEnableClientState(GL_TEXTURE_COORD_ARRAY);

          glVertexPointer(3, GL_SHORT, 0, vertices);glTexCoordPointer(2, GL_SHORT, 0, texCoords);

          // 繪制立方體并綁定紋理glBindTexture(GL_TEXTURE_2D, texture[0]);glDrawElements(GL_TRIANGLE_STRIP, 4, GL_UNSIGNED_BYTE, indices1);glBindTexture(GL_TEXTURE_2D, texture[1]);glDrawElements(GL_TRIANGLE_STRIP, 8, GL_UNSIGNED_BYTE, indices2);glBindTexture(GL_TEXTURE_2D, texture[2]);glDrawElements(GL_TRIANGLE_STRIP, 12, GL_UNSIGNED_BYTE, indices3);glBindTexture(GL_TEXTURE_2D, texture[3]);glDrawElements(GL_TRIANGLE_STRIP, 16, GL_UNSIGNED_BYTE, indices4);glBindTexture(GL_TEXTURE_2D, texture[4]);glDrawElements(GL_TRIANGLE_STRIP, 20, GL_UNSIGNED_BYTE, indices5);glBindTexture(GL_TEXTURE_2D, texture[5]);glDrawElements(GL_TRIANGLE_STRIP, 24, GL_UNSIGNED_BYTE, indices6);



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