A domain-specific embedded language approach for the scripting of game artificial intelligence

Abstract

A computer game’s artificial intelligence is often scripted using a domain-specific language designed specifically for the game. An approach to language design and prototyping, particularly appropriate to domain-specific ones, is that of embedding a language within a general purpose host language. In this pa- per, we present an approach to artificial intelligence scripting using embedded languages where the em- bedded language scripts become data objects in the host language enabling parametrized strategies and their manipulation through host language programs. We identify three classes of scripts: (i) fixed scripts written directly in the embedded language; (ii) adap- tive scripts, dynamically generated and modified by the host language programs whilst reacting to the state of the game; and (iii) adaptive scripts which, by means of multi-tiered language frameworks, allow for different levels of abstraction in the specification of game artificial intelligence.