short cavebuf[CAVE_BUFFER_WIDTH][CAVE_BUFFER_HEIGHT];
short nextbuf[CAVE_BUFFER_WIDTH][CAVE_BUFFER_HEIGHT];
short drawbuf[CAVE_BUFFER_WIDTH][CAVE_BUFFER_HEIGHT];
short cavebuf[CAVE_BUFFER_WIDTH][CAVE_BUFFER_HEIGHT];
short nextbuf[CAVE_BUFFER_WIDTH][CAVE_BUFFER_HEIGHT];
short drawbuf[CAVE_BUFFER_WIDTH][CAVE_BUFFER_HEIGHT];