int main(int argc, char** argv)
{
       glutInit(&argc, argv);
       glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB);
       glutInitWindowSize(800, 600);
       glutInitWindowPosition(100, 100);
       glutCreateWindow("Glut Window");
       engine = new Engine();
       engine->Init();
       glutDisplayFunc(display);
       glutReshapeFunc(reshape);
       glutMainLoop();
       return 0;
}