A Proposal on Game Engine Behavior Tree

게임 엔진 행동 트리 제안

  • Lee, Myoun-Jae (Division of Information Communication, BaekSeok University)
  • 이면재 (백석대학교 정보통신학부)
  • Received : 2016.06.28
  • Accepted : 2016.08.20
  • Published : 2016.08.28


A behavior tree is to express the behavior of artificial intelligence. The behavior tree has a characteristic that is easy to change state transitions than FSM(Finite State Machine), see the progress of the action. For these reasons, the behavior tree is widely used in more than FSM. This paper is to analyze the advantages and disadvantages on behavior trees of game engines, proposes the improved behavior tree based on analyzed them. To achieve this, in this paper, first, examines the role of node and the behavior tree structure of the unity engine, unreal engine. Second, discusses the advantages and disadvantages based on it. Third, proposes the behavior tree to improve the disadvantages of behavior tree of unity engine and unreal engine, depth of behavior tree and search time required to select the execution node. This paper can help developers using the tree to develop the game.


Behavior Tree;Game Engine;FSM;Artificial Intelligence;Unity Engine


Supported by : Baekseok University


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