The method by which existing geometry data from CAD programs (e.g. AutoCAD) can be used again is explained in this tutorial.
The goal of this tutorial is to import a cross section of a window construction that has been created with AutoCAD.

Figure 1: Window frame
Adjusting the import settings and opening a DXF file Selection of to be imported layers, Material assignment |
Url: http://www.infomind.ch/bph/en/flixo/manual/version6/index.html?tutorial3.htm