绘制矩形

简单的opengl程序入门：

#include"gl/glut.h"
void initial(void)
{glClearColor(1.0f,1.0f,1.0f,1.0f);glMatrixMode(GL_PROJECTION);gluOrtho2D(0.0,200.0,0.0,150.0);
}void Display(void)
{glClear(GL_COLOR_BUFFER_BIT);glColor3f(1.0f,0.0f,0.0f);glRectf(50.0f,100.0f,150.0f,50.0f);glFlush();
}
int main(int argc,char *argv[])
{glutInit(&argc,argv);glutInitDisplayMode(GLUT_SINGLE|GLUT_RGB);glutInitWindowSize(400,300);glutInitWindowPosition(100,120);glutCreateWindow("╬ьпн");glutDisplayFunc(Display);initial();glutMainLoop();return 0;
}