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

[satabol]

Windows 11, Blender 3.3.1, Sverchok-master

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

But Blender do bisect well:

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

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

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

sverchok/nodes/modifier_make/bisect.py

Lines 44 to 49 in 9ff8f36

	# this needs work function with solid geometry
	if fill:
	fres = bmesh.ops.edgenet_prepare(
	bm, edges=[e for e in res['geom_cut'] if isinstance(e, bmesh.types.BMEdge)]
	)
	bmesh.ops.edgeloop_fill(bm, edges=fres['edges'])

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:

With joined mesh:

Suzanne tomography:

Suzanna has non-manifold geometry so glitches are expected.

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

[satabol]

https://gist.github.com/8d13133a0b642422bf396005369c80de

Play with some noise transform of torus:

Attention for noise scale! Do not overlap source geometry with noise. Scale must not be big.

[satabol]

It is very old function.

May I ask somebody for approve or test? (I did several test and did not see unexpected results but I believe it is very important)

[satabol]

Can't stop play with that:

https://gist.github.com/f397c61f7275217008fb28b29bdfb260

[portnov]

Huh. If you will be able to make the Waffel node do it's work for this thing, you'll probably be able to CNC it :)

[rendetto]

I've made a test with one of my interactive scenes and it does not affect the performance.

[satabol]

@rendetto Thank you.