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【C】 GLUT示例

作者:韩万杰 / 发布于2015/9/14/ 950


	#include <windows.h>
	
	#define GLEW_STATIC
	#include "GL/glew.h"
	
	#include "GL/glut.h"
	#include <iostream>
	#include <cstring>
	#include <fstream>
	#include <cstdio>
	#include <cstdlib>
	
	using namespace std;
	
	static bool initialize();
	
	static void render();
	static void reshape(int width, int height);
	static void mouse(int button, int state, int x, int y);
	static void keyboard(unsigned char key, int x, int y);
	static void idle();
	
	int main(int argc, char *argv[])
	{
	 glutInit(&argc, argv);
	 glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGBA | GLUT_DEPTH | GLUT_STENCIL);
	 glutInitWindowPosition(50, 50);
	 glutInitWindowSize(800, 600);
	 glutCreateWindow("Template-Glut");
	
	 GLenum err = glewInit();
	 if(err != GLEW_OK) {
	 cerr << "glew init fail! err-str: " << glewGetErrorString(err) << endl;
	 system("pause");
	 exit(-1);
	 }
	
	 glutReshapeFunc(reshape);
	 glutMouseFunc(mouse);
	 glutKeyboardFunc(keyboard);
	 glutIdleFunc(idle);
	 glutDisplayFunc(render);
	
	 if(!initialize()) {
	 cerr << "initialize application fail!" << endl;
	 system("pause");
	 exit(-1);
	 }
	
	 glutMainLoop();
	 system("pause");
	 return 0;
	}
	
	bool initialize()
	{
	 //设置清除颜色为黑色
	 glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
	
	 //Note:
	 //opengl的默认视点eye-(0, 0, 0), 默认视线方向(0, 0, -1), 默认眼睛上方向(0, 1, 0)
	 //默认为正投影, 范围：x-(-1, 1), y-(-1, 1)
	
	 return true;
	}
	
	void reshape(int width, int height)
	{}
	
	void idle()
	{}
	
	void render()
	{
	 glClear(GL_COLOR_BUFFER_BIT);
	
	 glBegin(GL_TRIANGLES);
	 glColor3f(1.0, 0, 0);
	 glVertex3f(-0.5, -0.5, 0);
	 glColor3f(0, 1.0, 0);
	 glVertex3f(0.5, -0.5, 0);
	 glColor3f(0, 0, 1.0);
	 glVertex3f(0, 0.4, 0);
	 glEnd();
	
	 glFlush();
	
	 glutSwapBuffers();
	}
	
	void mouse(int button, int state, int x, int y)
	{}
	
	void keyboard(unsigned char key, int x, int y)
	{}

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