CAD->bisect node. Fix fill holes on complex objects (ex. torus).

Слиты nikitronn запросил слияние cad_bisect_fix_fill в master

Created by: satabol

Windows 11, Blender 3.3.1, Sverchok-master

ex. #4799 (closed) if replay with Bisect then result is unexpected too:

image

But Blender do bisect well:

image

What the problem? The part of problem is in operator bmesh.ops.bisect_plane. The Bisect Operator does not fill holes! (Unexpected!). See:

https://github.com/blender/blender/blob/3780a402651aeac0caa86767f823a8517a6f8bae/source/blender/editors/mesh/editmesh_bisect.c#L322-L333

image

But how Blender do fill? It do fill later with triangle_fill operator (https://docs.blender.org/api/current/bmesh.ops.html#bmesh.ops.triangle_fill)!

https://github.com/blender/blender/blob/3780a402651aeac0caa86767f823a8517a6f8bae/source/blender/editors/mesh/editmesh_bisect.c#L346-L355

image

But how Sverchok do fill on bisect [see line 49]?

https://github.com/nortikin/sverchok/blob/9ff8f36eab43ccb926840123dff58469c50bff6b/nodes/modifier_make/bisect.py#L44-L49

I think this is a problem. So I try replace bmesh.ops.edgeloop_fill to bmesh.ops.triangle_fill. And I got next result that look good:

image

Bisect 001

With joined mesh:

Bisect 002

Suzanne tomography:

Bisect 003

Suzanna has non-manifold geometry so glitches are expected.

for test this pull request: https://gist.github.com/78671a6264b9255acbb3883779fefc73