Implement makeSplineApprox for edges and faces

[adam-urbanczyk]

Will resolve #682

• implement Edge.makeSplineApprox
• implement Face.makeSplineApprox
• rework parametricCurve
• implement parametricSurface
• implement Edge.close
• add splineAppox to the CQ API
• BRepAlgoAPI_Splitter and rework Workplane.split

Also related to #675

[codecov]

Codecov Report

Merging #694 (0e136fb) into master (d5ce132) will increase coverage by 0.11%.
The diff coverage is 100.00%.

❗ Current head 0e136fb differs from pull request most recent head 7a259be. Consider uploading reports for the commit 7a259be to get more accurate results

@@            Coverage Diff             @@
##           master     #694      +/-   ##
==========================================
+ Coverage   94.41%   94.52%   +0.11%     
==========================================
  Files          31       32       +1     
  Lines        6909     7071     +162     
  Branches      740      766      +26     
==========================================
+ Hits         6523     6684     +161     
- Misses        252      254       +2     
+ Partials      134      133       -1     

Impacted Files	Coverage Δ
cadquery/occ_impl/geom.py	88.96% <ø> (ø)
cadquery/selectors.py	98.14% <ø> (ø)
cadquery/assembly.py	90.54% <100.00%> (ø)
cadquery/cq.py	91.32% <100.00%> (+0.26%)	⬆️
cadquery/occ_impl/shapes.py	92.53% <100.00%> (+0.30%)	⬆️
tests/naca.py	100.00% <100.00%> (ø)
tests/test_assembly.py	100.00% <100.00%> (ø)
tests/test_cadquery.py	99.17% <100.00%> (+0.03%)	⬆️

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[marcus7070]

Will Shape.split let me split a Wire with a Vertex?

I have needed to do that before, when making a ruled surface between a Wire with 4 edges and a spline with one edge. I needed to add 3 more vertices at certain locations on the spline. It was awkward and being able to split wires would be great improvement!

[adam-urbanczyk]

Will Shape.split let me split a Wire with a Vertex?

I have needed to do that before, when making a ruled surface between a Wire with 4 edges and a spline with one edge. I needed to add 3 more vertices at certain locations on the spline. It was awkward and being able to split wires would be great improvement!

I did a quick check and it seems to work.

[marcus7070]

I pushed two more tests. Feel free to revert if you don't want them, it was just easier to write the code than suggest them in comments.

[marcus7070]

I've still got more to look at here, I'll try to get back to it later today.

[marcus7070]

@adam-urbanczyk pushed some 500 lines of code without needing the "black fix" commit, I push like 15 LOC and mess up the streak. 🤦

[marcus7070]

I don't think we test splitting with multiple tool Shapes? edit: referring to the Shape.split method, not Workplane.split

Thinking about that some more, I'm ok with not testing it. I can't actually think of when I would ever split with multiple tools, I think it's a bit of an edge case.

edit: Added a test for this case below.

[jmwright]

Thanks @adam-urbanczyk this was a lot of work. I just had a few minor comments.

[adam-urbanczyk]

OK, I think this is ready to be merged.

[jmwright]

@adam-urbanczyk Thanks again!