Contour of intersection between two meshes

[crnh]

Hello,

I am currently working with MeshLib in Python and I like it a lot. One of the problems I am trying to solve, is finding the intersection contour between an ellipsoid and an arbitrarily shaped object. This actually brought me to MeshLib, because the readme states the following is part of the functionality of MeshLib:

Finding a contour representing intersection of two meshes, meshes remain unchanged

However, all boolean operations seem to return volumes or surfaces, but not contours. If I get a surface I can determine the contour using Mesh.topology, but I would like to know if there is a separate method for this, as the readme suggests. Am I overlooking something?

[Grantim]

Hello!

MeshLib/source/MRMesh/MRMeshBoolean.cpp

Lines 172 to 175 in 2c8991e

	// find intersections
	intersections = findCollidingEdgeTrisPrecise( meshA, meshB, converters.toInt, params.rigidB2A );
	// order intersections
	contours = orderIntersectionContours( meshA.topology, meshB.topology, intersections );

We have functions to find intersections contours of two meshes in c++, but unfortunately they are not bound to python modules yet.
We will try to expose it till next release of meshlib, hopefully in the beginning of July.

[crnh]

Clear, thanks a lot! I'll keep an eye out for the next releases.

[Grantim]

Hello!
We have just merged PR with needed exposing, it next release these functions will be available in python

MeshLib/test_python/test_booleanExposing.py

Lines 82 to 86 in ea8aaf2

	conv = mrmesh.getVectorConverters(meshA,meshB)
	intersections = mrmesh.findCollidingEdgeTrisPrecise(meshA,meshB,conv)
	orderedIntersections = mrmesh.orderIntersectionContours(meshA.topology,meshA.topology,intersections)
	aConts = mrmesh.getOneMeshIntersectionContours(meshA,meshB,orderedIntersections,True,conv)
	bConts = mrmesh.getOneMeshIntersectionContours(meshA,meshB,orderedIntersections,False,conv)