Class Callback

Base class for all physics engine callback objects.

Callback instances are created internally by the engine and passed to listener handler functions. They must not be stored beyond the scope of the handler — they are pooled and reused after the handler returns.

Concrete subclasses:

• BodyCallback — passed to BodyListener handlers
• ConstraintCallback — passed to ConstraintListener handlers
• InteractionCallback — passed to InteractionListener handlers
• PreCallback — passed to PreListener handlers

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