Q3Point3D_CrossProductTri (IM: QD3D)

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 Cross Products

Q3Point3D_CrossProductTri
You can use the Q3Point3D_CrossProductTri function to determine the cross product of the two vectors defined by three three-dimensional points.
TQ3Vector3D *Q3Point3D_CrossProductTri (
const TQ3Point3D *point1, 
const TQ3Point3D *point2, 
const TQ3Point3D *point3, 
TQ3Vector3D *crossVector);
point1
A three-dimensional point.
point2
A three-dimensional point.
point3
A three-dimensional point.
crossVector
On exit, the cross product of the two vectors determined by subtracting point2 from point1 and point3 from point1.

DESCRIPTION
The Q3Point3D_CrossProductTri function returns, as its function result and in the crossVector parameter, the cross product of the two vectors determined by subtracting point2 from point1 and point3 from point2.