KCL: Enable sweeping regions, and sweeping along sketch lines

[adamchalmers]

Part of #10728

Adds support for:

• Solid sweeps of a sketch2 region
• Surface sweeps of 1 or more sketch2 segments (may be open profile, closed profile, or totally disconnected)
• Sweeping along a path made from 1 or more consecutive sketch2 segments

[vercel]

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Project	Deployment	Actions	Updated (UTC)
modeling-app	Ready	Preview, Comment	Apr 7, 2026 5:12pm

[codspeed-hq]

Merging this PR will not alter performance

✅ 167 untouched benchmarks
⏩ 93 skipped benchmarks¹

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_{Comparing achalmers/sweep-solve (3e8f6ef) with main (87f9549)²}

Footnotes

1. 93 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩

2. No successful run was found on main (93becfe) during the generation of this report, so 87f9549 was used instead as the comparison base. There might be some changes unrelated to this pull request in this report. ↩

[jtran]

Q: You tested the reverse?

[jtran]

We should have an actual sim test or other automated test for this case. Not sure if one was made already.

[adamchalmers]

Yeah, here's an example of a successful sweep:

The path is a straight line and a tangential arc. The path is joined via coincident([line1.end, arc1.end]).

// Sketch a path
sketch002 = sketch(on = offsetPlane(YZ, offset = -2)) {
  line1 = line(start = [..], end = [..])
  arc1 = arc(start = [..], end = [..], center = [..])
  coincident([line1.end, arc1.end])
  tangent([line1, arc1])
}

// Sweep the square along the path.
path = [sketch002.line1, sketch002.arc1]
sweep(mySquare, path)