【openGL】关于画点

#include "stdafx.h"
#include <GL/glut.h>
#include <stdlib.h>
#include <math.h>
#include <stdio.h>

void myDisplay(void) {
    glClear(GL_COLOR_BUFFER_BIT);
    glPointSize(5.0f);    //修改点的尺寸，默认大小为1.0f
    glBegin(GL_POINTS);
    glVertex2f(0.0f, 0.0f);
    glVertex2f(0.5f, 0.5f);
    glVertex2f(-0.5f, 0.0f);
    glEnd();
    glFlush();
}

int main(int argc, char *argv[]){
    glutInit(&argc, argv);
    glutInitDisplayMode(GLUT_RGB | GLUT_SINGLE);
    glutInitWindowPosition(100, 100);
    glutInitWindowSize(500, 500);
    glutCreateWindow("OpenGL画圆程序");
    glutDisplayFunc(&myDisplay);
    glutMainLoop();
    return 0;
}