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

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

QuickDraw 3D Mathematical Utilities / Determining Vector Dot Products

Q3Vector2D_Dot

You can use the Q3Vector2D_Dot function to determine the dot product of two two-dimensional vectors.

float Q3Vector2D_Dot (
const TQ3Vector2D *v1, 
const TQ3Vector2D *v2);

v1

A two-dimensional vector.

v2

A two-dimensional vector.

DESCRIPTION

The Q3Vector2D_Dot function returns, as its function result, a floating-point value that is the dot product of the two vectors v1 and v2.