FeatureRequest: read values back out of subtree blackboards

[cmraaron]

if we have <SubTreePlus ID="sometree" thing="5" /> to write the value 5 into the blackboard used by <BehaviorTree ID="sometree" />, would it also make sense to have some thing like <SubTreePlus ID="sometree" thing="5" keysToCopyBackIntoParentIfSuccessful="{result_of_some_calculation}"/>, where it would expect to find that key in the child blackboard and write it back into the parent?

[asasine]

If you had a <SetBlackboard output_key="keysToCopyBackIntoParentIfSuccessful" value="42" /> in your subtree sometree, it should be available in the parent blackboard in the key result_of_some_calculation

<BehaviorTree ID="main">
  <Sequence>
    <SubTreePlus ID="sometree" thing="5" keysToCopyBackIntoParentIfSuccessful="{result_of_some_calculation}" />

    <!-- {result_of_some_calculation} should have the value "42" -->
    <SomeAction input="{result_of_some_calculation}" />
  </Sequence>
</BehaviorTree>

<BehaviorTree ID="sometree">
  <SetBlackboard output_key="keysToCopyBackIntoParentIfSuccessful" value="42" />
</BehaviorTree>

[facontidavide]

Issue related to SubTreePlus (deprecated). Closing