// A sample code using OpenGL and GLUT to render a black square on a white window

#include <GL/glut.h>
#include <iostream>
using namespace std;

#define WINDOW 400

void myInit()
{
	glClearColor(1.0,1.0,1.0,0.0);
	glColor3f(0.0,0.0,0.0);

	glMatrixMode(GL_PROJECTION);
	glLoadIdentity();
	gluOrtho2D(0,400,0,400);
	glMatrixMode(GL_MODELVIEW);
}

void display()
{
	glClear(GL_COLOR_BUFFER_BIT);

	
	glBegin(GL_POLYGON);
		glVertex2f(100,100);
		glVertex2f(300,100);
		glVertex2f(300,300);
		glVertex2f(100,300);
	glEnd();



	glFlush();
}


int main (int argc , char **argv)
{
	glutInit(&argc,argv);
	glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB);
	glutInitWindowSize(WINDOW,WINDOW);
	glutInitWindowPosition(100.0,100.0);
	glutCreateWindow("Hello World");
	glutDisplayFunc(display);
	myInit();
	glutMainLoop();

	return 0;
}