opengl

api.md

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opengl.md

double buffered windows

commands are executed on an offscreen && then swapped

• glut => GLUT_DOUBLE

detph buffer

for test

• glut => GLUT_DEPTH

glutReshapeFunc(ChangeSize);

Here, we must set a callback function for when the window changes size so that we can set up the viewport

verify glew

GLenum err = glewInit(); if (GLEW_OK != err) { fprintf(stderr, “GLEW Error: %s\n”, glewGetErrorString(err)); return 1; }

glutMainLoop

never returns after it is called until the main window is closed and needs to be called only once from an application. This function processes all the oper- ating system-specific messages, keystrokes, and so on until you terminate the program. It also makes sure those callback functions we registered earlier are called appropriately.