.\" Generated by the Allegro makedoc utility
.TH quat_slerp 3alleg4 "version 4.4.2" "Allegro" "Allegro manual"
.SH NAME
quat_slerp \- Version of quat_interpolate() allowing control over the rotation. Allegro game programming library.\&
.SH SYNOPSIS
.B #include <allegro.h>

.sp
.B void quat_slerp(const QUAT *from, const QUAT *to, float t, QUAT *out, int how);
.SH DESCRIPTION
The same as quat_interpolate(), but allows more control over how the 
rotation is done. The how parameter can be any one of the values:

.nf
   QUAT_SHORT  - like quat_interpolate(), use shortest path
   QUAT_LONG   - rotation will be greater than 180 degrees
   QUAT_CW     - rotate clockwise when viewed from above
   QUAT_CCW    - rotate counterclockwise when viewed from above
   QUAT_USER   - the quaternions are interpolated exactly as
                 given
   
.fi