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

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

QuickDraw 3D Mathematical Utilities / Calculating Distances Between Points

Q3RationalPoint3D_DistanceSquared

You can use the Q3RationalPoint3D_DistanceSquared function to determine the square of the distance between two rational three-dimensional points.

float Q3RationalPoint3D_DistanceSquared (
const TQ3RationalPoint3D *p1, 
const TQ3RationalPoint3D *p2);

p1

A rational three-dimensional point.

p2

A rational three-dimensional point.

DESCRIPTION

The Q3RationalPoint3D_DistanceSquared function returns, as its function result, the square of the distance between points p1 and p2. The distance returned is a two-dimensional distance.