DOKK / manpages / debian 10 / allegro4-doc / matrix_to_quat.3alleg4.en
matrix_to_quat(3alleg4) Allegro manual matrix_to_quat(3alleg4)

matrix_to_quat - Constructs a quaternion from a rotation matrix. Allegro game programming library.

#include <allegro.h>

void matrix_to_quat(const MATRIX_f *m, QUAT *q);

Constructs a quaternion from a rotation matrix. Translation is discarded during the conversion. Use get_align_matrix_f() if the matrix is not orthonormalized, because strange things may happen otherwise.

version 4.4.2 Allegro