Allegro 5 api
#include <allegro5/allegro.h> typedef struct ALLEGRO_TRANSFORM ALLEGRO_TRANSFORM;
Defines the generic transformation type, a 4x4 matrix. 2D transforms use only a small subsection of this matrix, namely the top left 2x2 matrix, and the right most 2x1 matrix, for a total of 6 values.
Fields:
m - A 4x4 float matrix