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


int id_WIN1; //ID primo MENU

void mainWin(void)
{
	glClearColor(0.0,0.0,0.0,0.0);
	glClear(GL_COLOR_BUFFER_BIT);	
	glBegin(GL_TRIANGLES);
		glColor3f(1.0,0.0,0.0);
		glVertex2i(5,5);
		glColor3f(0.0,1.0,0.0);
		glVertex2i(295,5);
		glColor3f(0.0,0.0,1.0);
		glVertex2i(145,295);
	glEnd();
	glFlush();
}



void myReshape(int w,int h){
	glViewport(0,0,w,h);
	glMatrixMode(GL_PROJECTION);
	glLoadIdentity();
	gluOrtho2D(0.0,(GLdouble)w,0.0,(GLdouble)h);

	glMatrixMode(GL_MODELVIEW);
	glLoadIdentity();
}

void InitGlut(void)
{
	glutInitDisplayMode(GLUT_RGB|GLUT_SINGLE);
	glutInitWindowSize(300,300);
	glutInitWindowPosition(50,50);

	id_WIN1=glutCreateWindow("Menu"); //Creo TOP-LEVEL Window

	glutDisplayFunc(mainWin);//Registrazione CALL-BACK function
	glutReshapeFunc(myReshape);
}

void InitGL(void){
	glShadeModel(GL_SMOOTH);
}

void main(int argc, char *argv[])
{
	glutInit(&argc, argv);
		InitGlut();
		InitGL();
	glutMainLoop();

}