Authoring meaningful crowds to populate a virtual city can be a cumbersome, time-consuming and an error-prone task. In this work, we present a new framework for authoring populated environments in an easier and faster way, by relying on the use of procedural techniques. Our framework consists of the procedural generation of semantically-augmented virtual cities to drive the procedural generation and simulation of crowds. The main novelty lies in the generation of agendas for each individual inhabitant (alone or as part of a family) by using a rule-based grammar that combines city semantics with the autonomous persons’ characteristics. A new population or city can be authored by editing rule files with the flexibility of reusing, combining or extending the rules of previous populations. The results show how logical and consistent sequences of whereabouts can be easily generated for a crowd providing a good starting point to bring virtual cities to life.

创作有意义的人群来填充虚拟城市可能是一项繁琐、耗时且容易出错的任务。在这项工作中，我们提出了一个新框架，通过使用程序技术，以更简单、更快捷的方式创作人口稠密的环境。我们的框架由语义增强的虚拟城市的程序生成组成，以驱动人群的程序生成和模拟。主要新颖之处在于通过使用基于规则的语法为每个居民（单独或作为家庭的一部分）生成议程，该语法将城市语义与自治人的特征相结合。可以通过编辑规则文件来创建新的人口或城市，并且可以灵活地重用、组合或扩展以前人口的规则。