NigelTheCreator

6 anni fadiscuss

Blender and Fusion on the geometry editing level are completely different beasts. Blender uses and edits meshes. Fusion360 and other CAD software primarily work on boundary representations which effectively represents a volume as a set of equations for surfaces and topological graph data. It allows for some neat operations but also makes it extremely difficult to handle correctly and a lot of the work in handling these operations is covering edge cases.

NigelTheCreator

6 anni fadiscuss

Sounds like a reinvention of coedges to me, boundary representations track topology and geometry in separated structures. The approximation errors are always a nasty issue and that is the no trivial work on a BREP modeling libraries, for different edge cases you need different algorithms and maybe even transform the geometry into a different parameter space to minimize the approximation errors on computing an intersection between geometries.

NigelTheCreator

7 anni fadiscuss

Interesting you find these problems a lot on CAD design, in 2D you can look at tools like AutoCAD that do similar things in a different setting.

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