// example file for glut-gl
// author: Matteo Lucarelli

#include <GL/gl.h>
#include <GL/glut.h>

void display_cb()
{
	glClear( GL_COLOR_BUFFER_BIT);
	glColor3d( 1.0, 1.0, 1.0 ); 
	glBegin(GL_POLYGON);
		glVertex2f( 0.5, 0.5);
		glVertex2f(-0.5, 0.5);
		glVertex2f(-0.5,-0.5);
		glVertex2f( 0.5,-0.5);
	glEnd();
	glutSwapBuffers( );
}

int main(int argc, char** argv)
{
	glutInit( &argc, argv );
	glutInitWindowSize( 100, 100 );
	glutCreateWindow("hello");
	glutDisplayFunc(display_cb);
	glutMainLoop();
	return 0;
}