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quat_interpolate(3)             Allegro manual             quat_interpolate(3)

NAME
       quat_interpolate - Constructs a quaternion representing a rotation
       between from and to. Allegro game programming library.

SYNOPSIS
       #include <allegro.h>

       void quat_interpolate(const QUAT *from, const QUAT *to, float t, QUAT
       *out);

DESCRIPTION
       Constructs a quaternion that represents a rotation between from and to.
       The argument t can be anything between 0 and 1 and represents where
       between from and to the result will be. 0 returns from, 1 returns to,
       and 0.5 will return a rotation exactly in between. The result is copied
       to out. This function will create the short rotation (less than 180
       degrees) between from and to.

SEE ALSO
       exquat(3)

Allegro                          version 4.4.2             quat_interpolate(3)