Accession Number : AD1026723


Title :   Hierarchical Task Network Prototyping In Unity3d


Descriptive Note : Technical Report


Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CA MONTEREY United States


Personal Author(s) : Miller,David


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/1026723.pdf


Report Date : 01 Jun 2016


Pagination or Media Count : 123


Abstract : The Combined Arms Analysis Tool for the 21st Century, or COMBATXXI, is the primary analytical combat simulation model in use by the Marine Corps Operations Analysis Division (OAD) and the Armys Training and Doctrine (TRADOC) Analysis Center for weapon system and force effectiveness analysis. The bottleneck in the COMBATXXI scenario production process is the behavior development process. Analytically useful scenarios demand complex and dynamic behaviors that react to the unique circumstances of the simulations current state. Hierarchical Task Networks (HTN) are the state-of-the-art methodology in COMBATXXI used to describe dynamic behaviors. Although HTNs decrease the scenario development time, they are difficult to conceptualize, validate, and troubleshoot. The long iteration cycle is due, in part, to the complex development environment, the necessity of a large simulated infrastructure to test behaviors, and an inability to visually debug. Here we present a solution for prototyping HTNs by extending an existing commercial implementation of Behavior Trees within the Unity3D game engine prior to building the HTN in COMBATXXI. Existing HTNs were emulated within this prototyping environment to test transferability of the behaviors, and new HTNs were prototyped in Unity3d prior to being built in COMBATXXI as a proof of concept. Prototyping HTNs in a 3D development environment may prove useful by reducing the iteration time and improving the overall quality of the behaviors. The interactive nature of Unity3dreduces the iteration time, and the ability to rapidly test many different cases improves the quality of the behaviors.


Descriptors :   combat simulations , computer programs , computer simulations , video games


Subject Categories : Military Operations, Strategy and Tactics
      Computer Programming and Software
      Cybernetics


Distribution Statement : APPROVED FOR PUBLIC RELEASE