pivot_sprite (3) - Linux Manuals
pivot_sprite: Rotates a sprite around a specified point. Allegro game programming library.
NAME
pivot_sprite - Rotates a sprite around a specified point. Allegro game programming library.SYNOPSIS
#include <allegro.h>
void pivot_sprite(BITMAP *bmp, BITMAP *sprite, int x, int y, int cx, int cy, fixed angle);