ellipsoid?

[D Del Vento]

I'm struggling to make an ellipsoid, i.e. a "squished" sphere.

If it weren't so difficult it is to scale things, I'd just make a sphere and scale it in one direction, but it ought to be a better way which I'm missing?

Thanks!

[D Del Vento]

I also tried revolve, but it looks like I can only revolve about a center *outside* of the revolved shape and for the ellipsoid I obviously want to do that on an *inside* point, so that doesn't work (assuming I'm interpreting correctly the  cryptic BRep_API: command not done error message)

[Lorenz]

Here is a revolve example:

from cadquery.func import *

ellipse1 = face(ellipse(8, 6))
rect1 = face(rect(20, 20)).moved(x=-10)
res = revolve(ellipse1 - rect1, (0, 0, 0), (0, 1, 0), 360)

Or as in GH issue 1461: https://github.com/CadQuery/cadquery/issues/1461#issuecomment-1873670608

import cadquery as cq
from cadquery.func import sphere

sphere1 = sphere(1.0)

a_x = 5.0
a_y = 10.0
a_z = 2.0

transform_mat = cq.Matrix(
    [
        [a_x, 0, 0, 0.0],
        [0, a_y, 0, 0.0],
        [0, 0, a_z, 0.0],
    ]
)

ellipsoid1 = sphere1.transformGeometry(transform_mat)

[Adam Urbanczyk]

You need to trim the ellipse first (using cut like above, or trim):

from cadquery.func import *

from math import pi

res = revolve(ellipse(2, 1).trim(0, pi), (0,0,0), (1,0,0), 360)