List (Array)

Arbor data flow supports lists (arrays).
Please use the behavior of each operation node and state for access.

Example using a list

The following is an example of randomly extracting elements from the list set in ParameterContainer.


  • Added StringList parameter to graph parameters.
  • Get with GetParameter.


  • Add the List.Count operation node to get the number of elements in the string type list.


  • Calculate the random index using the number of elements in the obtained list.


  • Gets a list element by random index.


  • Added SelectString parameter to graph parameters.
  • Set the retrieved random element in the SelectString parameter.
  • Repeat at 1 second intervals with a TimeTransition to see it change randomly.

Calculator Node

Use a calculation node to obtain various data that does not change the elements of List.


Use state behaviors to modify List elements.

Ahead-of-Time (AOT) Restrictions

Due to restrictions in the precompiled environment such as IL2CPP build, an exception will occur when using List<T> that is not referenced from the code.

See Unity - Manual: Scripting restrictions for more information on precompilation limits.

Here's how to use it that causes problems with Arbor.

  • Parameter
    • AssetObjectList
    • ComponentList
    • EnumList
  • List-related built-in scripts

To avoid such AOT problems, add code similar to the following.

using System.Collections.Generic;

public class AOTCodeGeneration
	// For example, if you create a Foo type but List<Foo> is not used in your code.
	public List<Foo> myStructList = new List<Foo>();

You do not need to use the AOTCodeGeneration class.
Writing in a script like this will ensure that the compiler will generate the appropriate code.