20 Setting Up Transformation Matrices

20 Q3Matrix3x3_SetRotateAboutPoint

You can use the Q3Matrix3x3_SetRotateAboutPoint function to configure a 3-by-3 rotation transformation matrix.

TQ3Matrix3x3 *Q3Matrix3x3_SetRotateAboutPoint (
TQ3Matrix3x3 *matrix3x3, 
const TQ3Point2D *origin, 
float angle);
matrix3x3 A 3-by-3 matrix.
origin The desired origin of rotation.
angle The desired angle of rotation, in radians.

DESCRIPTION


The Q3Matrix3x3_SetRotateAboutPoint function returns, as its function result and in the matrix3x3 parameter, a rotation matrix that rotates an object by the angle angle around the point origin.

DESCRIPTION

3D Graphics Programming with QuickDraw 3D - 17 OCT 1995

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