Make Rules Reactive with Batched Event Monitoring

Event-driven technique has been used to make objects reactive to changes in games and virtual reality applications. However, it tells little about how to make proper answers according to a set of rules as well as to current status. To achieve this goal, rules should be reactive to adapt to situation changing. After investigating four reactive models, the author presents the batched event monitoring model (BEMon). This model works as follows: (1) uses command pattern to describe the action of a rule;(2) attaching each command a condition expression; (3) by estimating the expression, the action part could not only know whether it should be performed, but know how to make different answers in different situations. Estimation of expressions would be performed in a batched manner to be compatible with the frame loop semantics of rendering. A football game case study shows the effectiveness of BEMon model.