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Halloween Update for FreeCAD & Debian Science Work

Filed under
Debian
Sci/Tech

In August, a major milestone towards unified, mainline mechanical assembly functionality in FreeCAD was reached.

One of the core challenges in implementing assembly functionality is the problem of topological naming. In a CAD model there are topological entities, such as solids, faces, edges, and vertices. We must choose some algorithm to name them so that you can refer to relationships to make an assembly. A simple example would be two cubes, connected by touching faces. If a parameter in your model changes, and after recalculation, your "Face_N" is on the wrong side of the cube, your assembly may break, or not be what you are expecting. Without a good approach to topological naming, parametric FreeCAD models won't be robust to changes and recalculations, which defeats the purpose of parametric modeling.

Because this is such a difficult problem, progress has been slow. However, recently a relatively new FreeCAD developer, 'realthunder', put significant work towards this problem, with a solution finally on the horizon. Because it required major changes to FreeCAD's internals, the review and testing period was and continues to be lengthy.

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