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

Chapter 15 - Pick Objects / Pick Objects Reference

Data Structures

Window-Point Pick Data Structure

You use a window-point pick data structure to specify information when creating a pick object for subsequent window-point picking. A window-point pick data structure is defined by the TQ3WindowPointPickData data type.

typedef struct TQ3WindowPointPickData {
   TQ3PickData                data;
   TQ3Point2D                 point;
   float                      vertexTolerance;
   float                      edgeTolerance;
} TQ3WindowPointPickData;

Field Description

data

A pick data structure specifying basic information about the window-point pick object.

point

A point, in window coordinates.

vertexTolerance

The vertex tolerance.

edgeTolerance

The edge tolerance.