Point Program

#include<stdio.h>

#include<GL/glut.h>

void myInit(){

    glClearColor(1.0,1.0,1.0,1.0);

    glColor3f(0.0,0.0,1.0);

    glMatrixMode(GL_PROJECTION);

    glLoadIdentity();

    gluOrtho2D(0.0,10.0,0.0,10.0);

    glMatrixMode(GL_MODELVIEW);

}

void display()

{

    glClear(GL_COLOR_BUFFER_BIT);

    glPointSize(4.0);

    glBegin(GL_POLYGON);

    glVertex2f(3.0,6.0);

    //glColor3f(0.0,1.0,0.0);

    glVertex2f(7.0,6.0);

    //glColor3f(0.0,0.0,1.0);

    glVertex2f(5.0,8.0);

    //glColor3f(1.0,1.0,0.0);

    glEnd();

    glBegin(GL_POLYGON);

    glColor3f(1.0,0.0,0.0);

    glVertex2f(3.0,6.0);

    glVertex2f(3.0,2.0);

    glVertex2f(7.0,2.0);

    glVertex2f(7.0,6.0);

    glEnd();

    glBegin(GL_POLYGON);

    glColor3f(0.0,0.0,0.0);

    glVertex2f(3.5,5.5);

    glVertex2f(3.5,4.6);

    glVertex2f(4.5,4.6);

    glVertex2f(4.5,5.5);

    glEnd();

    glBegin(GL_POLYGON);

    glColor3f(0.0,0.0,0.0);

    glVertex2f(3.5+2.0,5.5);

    glVertex2f(3.5+2.0,4.6);

    glVertex2f(2.0+4.5,4.6);

    glVertex2f(4.5+2.0,5.5);

    glEnd();

    glBegin(GL_POLYGON);

    glColor3f(1.0,1.0,1.0);

    glVertex2f(1.5+3.0,4.0);

    glVertex2f(1.5+3.0,2.0+0.155);

    glVertex2f(1.5+4.0,2.0+0.155);

    glVertex2f(1.5+4.0,4.0);

    glEnd();

    glFlush();

    glEnd();

}

int main(int argc,char **argv){

    glutInit(&argc,argv);

    glutInitDisplayMode(GLUT_RGB | GLUT_SINGLE);

    glutInitWindowSize(500,500);

    glutInitWindowPosition(100,100);

    glutCreateWindow("My First Example");

    glutDisplayFunc(display);

    myInit();

    glutMainLoop();

    return 0;

}