0.Xcode上创建openGL项目

创建opengl项目步骤

1，创建一个Cocoa的项目。 
2，将项目中的AppDelegate.h，AppDelegate.m，MainMenu.xib文件删除。然后将main.m文件删除，改为main.cpp文件。 
3，将include文件(OpenGL超级宝典5版源码里有这个文件)和libGLTools.a(mac上的动态库)导入到项目里。 
4，在项目设置，Build Phases下的Link Binary With Libraries 目录下，添加Xcode自带OpenGL库–GLUT.framework与OpenGL.framework库。 
5，最终工程文件结构如图： 

实例程序：三角形

#include "GLTools.h"#include "GLShaderManager.h"#ifdef __APPLE__#include <glut/glut.h>#else#define FREEGLUT_STATIC#endifGLBatch triangleBatch;GLShaderManager shaderManager;void ChangeSize(int w,int h){    glViewport(0, 0, w, h);}void SetupRC(){    glClearColor(0.0f, 0.0f, 1.0f, 1.0f);    shaderManager.InitializeStockShaders();    GLfloat vVerts[] = {        -0.5f,0.0f,0.0f,        0.5f,0.0f,0.0f,        0.0f,0.5f,0.0f,    };    triangleBatch.Begin(GL_TRIANGLES,3);    triangleBatch.CopyVertexData3f(vVerts);    triangleBatch.End();}void RenderScene(void){    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);    GLfloat vRed[] = {1.0f,0.0f,0.0f,1.0f};    shaderManager.UseStockShader(GLT_SHADER_IDENTITY,vRed);    triangleBatch.Draw();    glutSwapBuffers();}int main(int argc,char* argv[]){    gltSetWorkingDirectory(argv[0]);    glutInit(&argc, argv);    glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGBA | GLUT_DEPTH | GLUT_STENCIL);    glutInitWindowSize(800, 600);    glutCreateWindow("Triangle");    glutReshapeFunc(ChangeSize);    glutDisplayFunc(RenderScene);    GLenum err = glewInit();    if (GLEW_OK != err) {        fprintf(stderr, "glew error:%s\n",glewGetErrorString(err));        return 1;    }    SetupRC();    glutMainLoop();    return 0;}
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