bug: boolean.cut_mesh

[GlennWSo]

problem

the returned forntier: Web sometimes have missing edges

example:

from madcad import *

cut_tool = icosphere(vec3(0), 1, resolution=("div", 1))
plane = square(Axis(vec3(0), Z), width=4)
mesh, web = boolean.cut_mesh(plane, cut_tool)

show([web])

I expected that example snippet would show a web that forms a closed loop. It does not

[jimy-byerley]

Strange it does not form a closed loop. I can actually reproduce this result, so I will investigate

[jimy-byerley]

I found the cause of the issue, a stupid mistake I made in core.intersect_triangles
I will write a non-regression-test for this

I'm surprised it did not caused more troubles in the boolean operations until now, that's fun you noticed it on a wrong result of cut_mesh() rather than on a boolean operation on a bigger mesh.
Anyway, thanks for reporting it !