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_SetRotateY

You can use the Q3Quaternion_SetRotateY function to configure a quaternion that rotates objects around the y axis.

TQ3Quaternion *Q3Quaternion_SetRotateY (
TQ3Quaternion *quaternion, 
float angle);

quaternion

A quaternion.

angle

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

DESCRIPTION

The Q3Quaternion_SetRotateY function returns, as its function result and in the quaternion parameter, a quaternion that rotates an object by the angle angle around the y axis.