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

Chapter 4 - Geometric Objects / Geometric Objects Reference

Data Structures

Quaternions

QuickDraw 3D defines quaternions as quadruples of floating-point numbers. A quaternion is defined by the TQ3Quaternion data type.

Note

For a description of quaternions and their use in computer graphics, see the article by Hart, Francis, and Kaufman listed in the Bibliography and the articles cited in that article.

typedef struct TQ3Quaternion {
   float       w;
   float       x;
   float       y;
   float       z;
} TQ3Quaternion;

Field Description

w

The w component of a quaternion.

x

The x component of a quaternion.

y

The y component of a quaternion.

z

The z component of a quaternion.

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