* init() *****************************************************************************/

program & OpenGL initialization */

Generate vertices and indices for the heightmap */

Create VBO, IBO and VAO objects for the heightmap geometry and bind them to * the specified program object */

Creates a program object using the specified vertex and fragment text */

Mersenne Twister implementation from Wikipedia.

a quick hack to only allow decoding some of a PNG... I should implement real streaming support instead

* Permutes argv[] so that the argument currently being processed is moved * to the end. */

* Permutes argv[] so that the argument currently being processed is moved * to the end. */

after we see SOS

We need the second derivative cycloid here because we need it for f = ma

Initialize OpenGL */

this function is designed to support animated gifs, although stb_image doesn't support it