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

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

QuickDraw 3D Mathematical Utilities / Determining Point Affine Combinations

Q3Param2D_AffineComb

You can use the Q3Param2D_AffineComb function to determine the two-dimensional parametric point that is the affine combination of an array of parametric points.

TQ3Param2D *Q3Param2D_AffineComb (
const TQ3Param2D *params2D, 
const float *weights, 
unsigned long nPoints, 
TQ3Param2D *result);

params2D

A pointer to an array of two-dimensional parametric points.

weights

A pointer to an array of weights. The sum of the weights must be 1.0.

nPoints

The number of points in the params2D array.

result

On exit, the parametric point that is the affine combination of the parametric points in params2D having the weights in the weights array.

DESCRIPTION

The Q3Param2D_AffineComb function returns, as its function result and in the result parameter, the parametric point that is the affine combination of the parametric points in the array params2D having the weights in the array weights.