glutInitDisplayMode(GLUT_DEPTH|GLUT_DOUBLE|GLUT_RGB|GLUT_3_2_CORE_PROFILE);
glutInitWindowSize(windowWidth, windowHeight);
int win = glutCreateWindow("Physically Based Rendering");
glutInitDisplayMode(GLUT_DEPTH|GLUT_DOUBLE|GLUT_RGB|GLUT_3_2_CORE_PROFILE);
glutInitWindowSize(windowWidth, windowHeight);
int win = glutCreateWindow("Physically Based Rendering");