include

void display() { glClear(GL_COLOR_BUFFER_BIT); glBegin(GL_TRIANGLES); glVertex2f(-0.5, -0.5); glVertex2f(0.5, -0.5); glVertex2f(0.0, 0.5); glEnd(); glFlush(); }

int main(int argc, char argv) { glutInit(&argc, argv); glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB); glutInitWindowSize(500, 500); glutInitWindowPosition(100, 100); glutCreateWindow("OpenGL Triangle Example"); glClearColor(0.0, 0.0, 0.0, 1.0); glutDisplayFunc(display); glutMainLoop(); return 0; }