Inside Macintosh: 3D Graphics Programming With QuickDraw 3D /

Chapter 20 - QuickDraw 3D Mathematical Utilities / QuickDraw 3D Mathematical Utilities Reference

QuickDraw 3D Mathematical Utilities / Managing Quaternions

Q3Quaternion_SetRotateZ

You can use the Q3Quaternion_SetRotateZ function to configure a quaternion that rotates objects around the z axis.

TQ3Quaternion *Q3Quaternion_SetRotateZ (
TQ3Quaternion *quaternion, 
float angle);

quaternion

A quaternion.

angle

The desired angle of rotation around the z coordinate axis, in radians.

DESCRIPTION

The Q3Quaternion_SetRotateZ function returns, as its function result and in the quaternion parameter, a quaternion that rotates an object by the angle angle around the z axis.