关于在OpengL里display()描点传参数

void display()
{  
   
// glClearColor(0.5,0.5,0.5,1);
 glClear(GL_COLOR_BUFFER_BIT);
 glPointSize(5.0);
// glLineWidth(5.0);

 glBegin(GL_POINTS);
 
 for(int i=0;i<GLPoint.size;i++)
 {
  glColor3f(1.0,0.0,0.0);
     glVertex3f(GLPoint.points[i].x,GLPoint.points[i].y,0);                                                                       
 }
      
  /* glVertex2f(GLPoint.points[0].x, GLPoint.points[0].y);  
            glVertex2f(-0.5,-0.5);
         glVertex2f(-0.5, 0.5);      // 二维平面上的一个点
         glVertex2f(0.5, 0.5);
         glVertex2f(0.5, -0.5);*/

 

 glEnd();
 glFlush();

}