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Comment by gwbas1c

19 hours ago

What's nice about this is that it allows for programmatic CAD, enabling things like web applications that can download an .stl file based on user input. I hope I can find a weekend or two to play with it.

BTW: I spent a few weekends playing with Microcad (https://microcad.xyz/). It was cool, and had a similar rust feel. I just, for the life of me, couldn't figure out how to do 3d ellipses.

4 comments

gwbas1c

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Cargo4286  14 hours ago

Here's an ellipsoid in build123d using geometric transformation of a sphere:

    from build123d import *
    mat = Matrix([[2,0,0,0],[0,1.5,0,0],[0,0,0.5,0]])
    ellipsoid = Sphere(100).transform_geometry(mat)

Also, FYI build123d now runs in the browser thanks to OCP.wasm. Example playground here https://jojain.github.io/build123d-sandbox/

  • asimeqi  13 hours ago

    If you are using build123d, probably the easiest way is to sketch an ellipse and revolve it.

    • Cargo4286  13 hours ago

      The definition of an ellipsoid is that it can have three independent radii. A revolved ellipse only has two independent radii. If only two independent radii are needed then yes I agree with you, but I wanted to provide a fully qualified answer.