Rhino brep slice

[chenkasirer]

Added RhinoBrep.slice() and RhinoBrep.trimmed().

Changed signature of Brep.slice() to return compas.geometry.Curve instead of BrepFace.

@tomvanmele this isn't quite what we discussed, but in Rhino a Brep with no surfaces is not valid. BrepFace and other Brep components all don't have public constructors so I don't see a way to return a face either :/
Let me know what you think.

What type of change is this?

• Bug fix in a backwards-compatible manner.
• New feature in a backwards-compatible manner.
• Breaking change: bug fix or new feature that involve incompatible API changes.
• Other (e.g. doc update, configuration, etc)

Checklist

Put an x in the boxes that apply. You can also fill these out after creating the PR. If you're unsure about any of them, don't hesitate to ask. We're here to help! This is simply a reminder of what we are going to look for before merging your code.

• I added a line to the CHANGELOG.md file in the Unreleased section under the most fitting heading (e.g. Added, Changed, Removed).
• I ran all tests on my computer and it's all green (i.e. invoke test).
• I ran lint on my computer and there are no errors (i.e. invoke lint).
• I added new functions/classes and made them available on a second-level import, e.g. compas.datastructures.Mesh.
• I have added tests that prove my fix is effective or that my feature works.
• I have added necessary documentation (if appropriate)

[tomvanmele]

why not just a plane?

[tomvanmele]

is there a reason why trimming converts a plane to a frame, and slicing converts a frame to a plane?

[chenkasirer]

totally random. but changed in trimmed as makes more sense to eventually use Plane..