Rule Files

In the CityEngine, buildings are described using the CGA grammar. A CGA rule file consists of several rules that define how the actual building geometry is created. A CGA rule file is usually assigned to a shape (e.g., a lot or a street etc.). One of the rules defined in the file is then chosen to be the shape's start rule, i.e., generation will start with this rule.

In this section, a short round-up of the typical steps necessary to work with rule files is given.

Table of Contents

Creating a new Rule File

Writing a Rule File

Assigning a Rule File to a Shape

Setting the Start Rule

Applying the Rules to generate a 3D Model

Copyright ©2008-2018 Esri R&D Center Zurich. All rights reserved.