Implementation of Hierarchical Finite State Machine for Controlling 2D Character Animation in Action Video Game

This research applies Hierarchical Finite State Machine (HFSM) to the 2-dimensional player character animation control by creating states based on the player’s movement design and then grouped based on the same behavior. The animation control is integrated with the animation controller interface from Unity, then processed based on input from the player in each state. The application of the HFSM method is tested using a black-box approach with the Test Flow Diagram (TFD) method and Frame Rate) testing. The animation control on the player character runs as expected, TFD produces a test flow that is taken based on the possibility of player input to be processed by HFSM during the game. The test flow is tested for validity based on the player’s input with the corresponding state expectation. Frame Rate testing was conducted to measure the performance of HFSM by comparing it with FSM. The average result of HFSM Frame Rate is 151.1 FPS, this value is superior compared to FSM which is 131.1 FPS. The performance increase from using HFSM is 15.24% higher than FSM performance.