1 #include <stdio.h>  2 #include <GLTools.h>  3   4 #include <GLShaderManager.h>  5   6    7   8 #ifdef __APPLE__  9  10 #include <GLUT/glut.h> 11  12 #else 13  14 #define FREEGLUT_STATIC 15  16 #include <GL/glut.h> 17  18 #endif 19  20   21  22 GLBatch triangleBatch; 23  24 GLShaderManager shaderManager; 25  26   27  28 void changeSize( int W, int H ) 29  30 { 31  32     glViewport(0, 0, W, H); 33  34 } 35  36   37  38 void SetupRc() 39  40 { 41  42     glClearColor(1.0f, 1.0f, 1.0f, 1.0f); 43  44      45  46     shaderManager.InitializeStockShaders(); 47  48      49  50     GLfloat vVerts[] = { -0.5f, 0.0f, 0.0f, 51  52                         0.5f, 0.0f, 0.0f, 53  54                         0.0f, 0.5f, 0.0f}; 55  56      57  58     triangleBatch.Begin(GL_TRIANGLES, 3); 59  60     triangleBatch.CopyVertexData3f(vVerts); 61  62     triangleBatch.End(); 63  64 } 65  66   67  68 void   RenderScene() 69  70 { 71  72     glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT ); 73  74      75  76     GLfloat vRed[] = { 1.0f, 0.0f, 0.0f, 1.0f }; 77  78     shaderManager.UseStockShader( GLT_SHADER_IDENTITY,vRed ); 79  80     triangleBatch.Draw(); 81  82      83  84     glutSwapBuffers(); 85  86 } 87  88   89  90 int main( int argc, char* argv[] ) 91  92 { 93  94     //设置当前工作目录 95  96     gltSetWorkingDirectory(argv[0]); 97  98      99 100     //初始化glut101 102     glutInit(&argc, argv);103 104     105 106     //设置显示模式107 108     glutInitDisplayMode( GLUT_DEPTH|GLUT_RGBA|GLUT_STENCIL|GLUT_DOUBLE );109 110     111 112     //初始化窗口113 114     glutInitWindowSize(800, 600);115 116     117 118     //创建窗口，并且命名119 120     glutCreateWindow( "Triangle" );121 122     123 124     125 126     glutReshapeFunc(changeSize);127 128     129 130     glutDisplayFunc(RenderScene);131 132     133 134     GLenum err = glewInit();135 136     if (err !=GLEW_OK )137 138     {139 140         fprintf(stderr, "GLEW Error: %s\n",glewGetErrorString(err) );141 142         return 1;143 144     }145 146     147 148     SetupRc();149 150     151 152     //开启OpenGL主循环153 154     glutMainLoop();155 156     157 158     159 160     return 0;161 162 }163 164