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  3. OnSimulate function

OnSimulate function

Learn technical details about the OnSimulate function.

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Called when the component begins simulating within the scene.

  • Use this to add asynchronous/suspends update logic for a component.
  • OnBeginSimulation is guaranteed to run before OnSimulate.
  • OnSimulate will be cancelled before OnEndSimulation
   
Verse using statement using { /Verse.org/SceneGraph }

OnSimulate<protected><native_callable>()<transacts><suspends><no_rollback>:void

Parameters

OnSimulate does not take any parameters.

Attributes, Specifiers, and Effects

Specifiers

The following specifiers determine how you can interact with OnSimulate in your programs. For the complete list of specifiers, see the Specifiers Page.

Specifier Meaning
protected The identifier is only accessible in the current class and any subtypes. You can use this on classes, interfaces, structs, enums, non-module methods, and data.
native_callable Indicates that an instance method is both native (implemented in C++) and may be called by other C++ code. You can see this specifier used on an instance method. This specifier doesn't propagate to subclasses and so you don't need to add it to a definition when overriding a method that has this specifier.

Effects

The following effects determine how OnSimulate behaves in your programs. For the complete list of effects, see the Effect Specifers section of the Specifiers Page.

Effect Meaning
transacts This effect indicates that any actions performed by the function can be rolled back. The transacts effect is required any time a mutable variable (var) is written. You'll be notified when you compile your code if the transacts effect was added to a function that can't be rolled back. Note that this check is not done for functions with the native specifier.
suspends Indicates that the function is async. Creates an async context for the body of the function.
no_rollback This is the default effect when no exclusive effect is specified. The no_rollback effect indicates that any actions performed by the function cannot be undone and so the function cannot be used in a failure context. This effect cannot be manually specified.

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