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

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

QuickDraw 3D Mathematical Utilities / Adding and Subtracting Points and Vectors

Q3Point2D_Vector2D_Subtract

You can use the Q3Point2D_Vector2D_Subtract function to subtract a two-dimensional vector from a two-dimensional point.

TQ3Point2D *Q3Point2D_Vector2D_Subtract (
const TQ3Point2D *point2D, 
const TQ3Vector2D *vector2D, 
TQ3Point2D *result);

point2D

A two-dimensional point.

vector2D

A two-dimensional vector.

result

On exit, a two-dimensional point that is the result of subtracting vector2D from point2D.

DESCRIPTION

The Q3Point2D_Vector2D_Subtract function returns, as its function result and in the result parameter, the two-dimensional point that is the result of subtracting the vector vector2D from the point point2D.