In the first introductory tutorial, Basic Techniques, you have learned how to create models with rectangular domains. In this tutorial, you will learn a few new techniques: how to create polygon material domains and components, as well as how to set guidelines.
In Figure 1, a window frame is illustrated. This construction will be generated step by step.

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Polygon Domains and Relative Coordinates Using Components and Guidelines |
Url: http://www.infomind.ch/bph/en/flixo/help/version5/index.html?tutorial2.htm