A TrackBall object translates widget events from a draw widget (created with the WIDGET_DRAW function) into transformations that emulate a virtual trackball (for transforming object graphics in three dimensions).

This object class is implemented in the IDL language. Its source code can be found in the file trackball__define.pro in the lib subdirectory of the IDL distribution.

Superclasses

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None

Creation

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See TrackBall::Init.

Properties

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Objects of this class have the following properties. See TrackBall Properties for details on individual properties.

• AXIS
• CONSTRAIN
• MOUSE

In addition, objects of this class inherit the properties of all superclasses of this class.

Methods

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This class has the following methods:

• TrackBall::Init
• TrackBall::Reset
• TrackBall::Update

In addition, this class inherits the methods of its superclasses (if any).

Version History

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5.0	Introduced