OpenGL single first

第一个简单的OpenGL程序

#include<stdio.h>
#include<glut.h>

void display()
{
	glClearColor(0.0,0.0,0.0,0.0);
	glClear(GL_COLOR_BUFFER_BIT);
	glBegin(GL_POLYGON);
	glVertex2f(-0.5, 0.5);
	glVertex2f(0.5, 0.5);
	glVertex2f(0.5,-0.5);
	glVertex2f(-0.5, -0.5);
	glEnd();
	glFlush();
}

int main(int argc,char **argv )
{
	glutInit(&argc, argv);
	glutInitWindowPosition(100, 100);
	glutInitWindowSize(500, 500);
	glutCreateWindow("test");
	glutDisplayFunc(display);
	glutMainLoop();
}