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

Chapter 15 - Pick Objects / Pick Objects Reference

Constants

Pick Parts Masks

QuickDraw 3D defines pick parts masks to indicate the kinds of objects it has placed in the hit list. You use the face, vertex, and edge values to pick parts of meshes. To pick any other object, use the value kQ3PickPartsObject.

typedef enum TQ3PickPartsMasks {
   kQ3PickPartsObject                        = 0,
   kQ3PickPartsMaskFace                      = 1 << 0,
   kQ3PickPartsMaskEdge                      = 1 << 1,
   kQ3PickPartsMaskVertex                    = 1 << 2
} TQ3PickPartsMasks;

Constant descriptions

kQ3PickPartsObject

The hit list contains only whole objects.

kQ3PickPartsMaskFace

The hit list contains faces.

kQ3PickPartsMaskEdge

The hit list contains edges.

kQ3PickPartsMaskVertex

The hit list contains vertices.