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erlang_behaviour_trees

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An implementation of behaviour trees in erlang.

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erlang_behaviour_trees src bt_engine bt_node_behaviours nodes.hrl
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src/bt_engine/bt_node_behaviours/nodes.hrl 

%% record definitions for nodes



-record(decorator, {

  name :: string(),

  module :: atom(),

  args :: map(),

  state :: term(),

  child :: term(),

  metadata :: metadata()

}).



-record(sequence, {

  name :: string(),

  namespace :: namespace(),

  children :: list(term()),

  metadata :: metadata()

}).



%% TODO: add selector

-record(selector, {

  name :: string(),

  namespace :: namespace(),

  children :: list(term()),

  metadata :: metadata()

}).



-record(task, {

  name :: string(),

  module :: atom(),

  args :: map(),

  state :: term(),

  metadata :: metadata()

}).



-record (metadata, {

  status=not_run :: status() | not_run,

  %% these are all optional right now, not filling them since not using them.

  prev_state :: term(),

  prev_bb :: blackboard(),

  next_bb :: blackboard()

}).



-type namespace() :: list(string()).

-type decorator() :: #decorator{}. 

-type sequence() :: #sequence{}.

-type selector() :: #selector{}.

-type task() :: #task{}.

-type blackboard() :: map().

-type event() :: term().

-type status() :: success | failure | running.

-type metadata() :: #metadata{}.

-type bt_node() :: decorator() | sequence() | selector() | task().