Rotates and flips a sprite around a specified point. allegro game programming library.
#include <allegro.h>
void pivot_sprite_v_flip_trans(BITMAP *bmp, BITMAP *sprite, int x, int y, int cx, int cy, fixed angle);
Like rotate_sprite_v_flip_trans(), but aligns the point in the sprite given by (cx, cy) to (x, y) in the bitmap, then rotates around this point.
rotate_sprite_trans(3alleg4), rotate_sprite_v_flip_trans(3alleg4), pivot_sprite_trans(3alleg4), exsprite(3alleg4)