man 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);
DESCRIPTION
Like rotate_sprite(), but aligns the point in the sprite given by (cx, cy) to (x, y) in the bitmap, then rotates around this point.