3D Graphics Programming with QuickDraw 3D 1.5.4

Negating Vectors

QuickDraw 3D provides routines that you can use to negate (or reverse) vectors. The result of negating a vector is a vector having the same magnitude but the opposite direction as the original vector.

Q3Vector2D_Negate

You can use the Q3Vector2D_Negate function to negate a two-dimensional vector.



 
TQ3Vector2D *Q3Vector2D_Negate (

                     const TQ3Vector2D *vector2D, 

                     TQ3Vector2D *result);

vector2D: A two-dimensional vector.
result: On exit, the negation of the specified vector.

DESCRIPTION

The Q3Vector2D_Negate function returns, as its function result and in the result parameter, the vector that is the negation of the vector vector2D .

Q3Vector3D_Negate

You can use the Q3Vector3D_Negate function to negate a three-dimensional vector.



 
TQ3Vector3D *Q3Vector3D_Negate (

                     const TQ3Vector3D *vector3D, 

                     TQ3Vector3D *result);

vector3D: A three-dimensional vector.
result: On exit, the negation of the specified vector.

DESCRIPTION

The Q3Vector3D_Negate function returns, as its function result and in the result parameter, the vector that is the negation of the vector vector3D .