I remade my processing version of langton's turmite in C++ with SDL. This version only lets you spawn one ant at a time in the center of the screen. However, it is much faster than the processing version. Video animation here
The program will ask you for a movement pattern when you first run it. See explanation given in the processing version above.
SPACEBAR: Toggle pause
Movement pattern: LLRRRLRRRRR
Movement pattern: LRRL
Movement pattern: RRRLRLLLLLLRRRRL
Movement pattern: RLLLLLLLRRRRRLRLLRL
Movement pattern: RRRLRLLLLLLRRRRL
WIDTH: Window width
HEIGHT: Window height
CELLSIZE: Pixel size of each grid
STEPSPERFRAME: How many steps to evaluate before animating a frame