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

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

QuickDraw 3D Mathematical Utilities / Transforming Points and Vectors

Q3Vector2D_Transform

You can use the Q3Vector2D_Transform function to apply a transform to a two-dimensional vector.

TQ3Vector2D *Q3Vector2D_Transform (
const TQ3Vector2D *vector2D, 
const TQ3Matrix3x3 *matrix3x3, 
TQ3Vector2D *result);

vector2D

A two-dimensional vector.

matrix3x3

A 3-by-3 matrix.

result

On exit, the vector that is the result of multiplying vector2D by matrix3x3.

DESCRIPTION

The Q3Vector2D_Transform function returns, as its function result and in the result parameter, the vector that is the result of multiplying the vector vector2D by the matrix transform matrix3x3. Note that on entry the result parameter can be the same as the vector2D parameter.