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erlang_behaviour_trees

0.2.0
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An implementation of behaviour trees in erlang.

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erlang_behaviour_trees src samples tasks set_var_task.erl
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src/samples/tasks/set_var_task.erl 

-module(set_var_task).

-behavior(bt_task).

-export([

  get_params/0,

  run/3

]).



get_params() ->

  ["var", "value"].



run(#{"var" := Var_key, "value" := Value_key}, BB, _) -> 

  %% if already set, don't do anything

  case blackboard:is_set(Var_key, BB) of

    true ->

      {success, BB};

    false ->

      Value = blackboard:eval(Value_key, BB),

      io:format("Setting ~p to ~p~n", [Var_key, Value]),

      NewBB = blackboard:write(Var_key, Value, BB),

      {success, NewBB}

  end.