Journal of Digital Convergence (디지털융복합연구)

The Society of Digital Policy and Management (한국디지털정책학회)
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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
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Abstract

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.

행동 트리는 인공지능의 행동을 표현하는 트리로 FSM(Finite State Machine)보다 상태 전이가 용이하고 행동의 진행을 쉽게 알 수 있는 특징을 갖고 있다. 때문에 최근 FSM보다 널리 쓰이고 있는 추세이다. 본 논문은 이러한 배경에서 게임 엔진의 행동 트리의 장단점을 분석하고 이를 바탕으로 개선된 행동 트리를 제안하기 위한 것이다. 이를 위해 본 논문에서는 첫째, 유니티 엔진과 언리얼 엔진의 행동 트리 구조와 노드들의 역할을 먼저 살펴본다. 둘째, 살펴본 행동 트리의 구조와 노드들을 바탕으로 장점과 단점을 논한다. 셋째, 이 행동 트리들의 단점인 트리의 깊이와 실행 노드 검색 시간을 개선한 행동 트리를 제안한다. 본 논문은 추후 행동 트리를 사용해 게임 개발을 하려는 개발자들에게 도움을 줄 수 있다.

Keywords

References

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