OpenGL Programming Guide: The Official Guide to Learning OpenGL, Version 4.3, Eighth Edition

Entering main()

Starting at the beginning, of how our program would execute, we first look at what’s going on in main(). The first six lines use the OpenGL Utility Toolkit to configure and open window for us. While the details of each of these routines is covered in Appendix A, we’ll discuss the flow of the commands here.

Click here to view code image

int main(int argc, char** argv){    glutInit(&argc, argv);    glutInitDisplayMode(GLUT_RGBA);    glutInitWindowSize(512, 512);    glutInitContextVersion(4, 3);    glutInitContextProfile(GLUT_CORE_PROFILE);    glutCreateWindow(argv[0]);    if (glewInit()) {        cerr << "Unable to initialize GLEW ... exiting" << endl;        exit(EXIT_FAILURE);    }    init();    glutDisplayFunc(display);    glutMainLoop(); ...