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OpenSCAD is all triangles and vertices. Fillets are difficult to do. Outputting circles/spheres generally requires you to for-loop over vertices a lot.

Libraries like build123d and cadquery use OpenCASCADE, a boundary representation kernel. You think in terms of the enclosed solid and perform operations - boolean add/subtract, fillet/chamfer, stamp text, etc - that return a new solid.

by 7bees1 hours ago|

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I'm not sure I understand your comment; OpenSCAD has functions like sphere(), cylinder(), etc. Most OpenSCAD models I have seen are built up primarily from solid primitives combined using boolean operations, just as you describe for the other tools.

https://en.wikibooks.org/w/index.php?title=OpenSCAD_User_Man...

by seltzered_36 minutes ago|

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Theres a better description of the differences here: https://build123d.readthedocs.io/en/latest/OpenSCAD.html#tra...

Some of the differences may be in when you are trying to reference a face/edge to build off of, not just about the primitive function being used.

by Doxin31 minutes ago|

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OpenSCAD works natively with triangle meshes. sphere() will create a spherical triangle mesh.

These libraries on the other hand can natively represent a sphere for instance. This means that during CAD-ing you don't need to worry about resolution, that's a consideration for export only.

by DrNefario4 hours ago|

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CadQuery can export STEP files, and is overall much nicer to use in my opinion.

by RobotToaster22 minutes ago|

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Openscad can export to CSG, which can be imported by free cad or converted to STEP https://github.com/gega/csg2stp

by xrd4 hours ago|

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