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

Chapter 13 - View Objects / View Objects Reference

View Objects Routines / Picking in a View

Q3View_StartPicking

You can use the Q3View_StartPicking function to start picking in a view.

TQ3Status Q3View_StartPicking (
TQ3ViewObject view,
TQ3PickObject pick);

view

A view.

pick

A pick object.

DESCRIPTION

The Q3View_StartPicking function begins the process of picking in the view specified by the view parameter, using the pick object specified by the pick parameter. After calling Q3View_StartPicking, you specify the model (for instance, by calling Q3Geometry_Submit). When you have completely specified that model, you should call Q3View_EndPicking to complete the picking operation. The renderer attached to the specified view might need to reprocess the model data, so you should always call Q3View_StartPicking and Q3View_EndPicking in a picking loop.

SPECIAL CONSIDERATIONS

You should not call Q3View_StartPicking while picking is already occurring.