How to reproduce MeshInspector’s MeshHealer results using python_scripts/healer.py?

[osmaoui]

I’m trying to reproduce the same mesh healing results obtained with the MeshHealer tool in the MeshInspector web app using the python_scripts/healer.py script.

However, the output from the Python script appears noticeably different particularly in hole filling and mesh reconstruction quality.

In the MeshInspector app, I can control several repair options such as:

Disconnected Parts (large/small), Holes (large/small), Self-Intersections ..

I would like to know:

How can I access or adjust these same parameters when using python_scripts/healer.py ?
Does the MeshInspector web app use a newer or more advanced version of the healer function compared to the Python script?

[Grantim]

Hello!

python_scripts/healer.py is analogue for Rebuild tab of MeshHealer tool in MeshInspector (actually it can be updated too, to use mm.rebuildMesh function)

Repair tab on MeshHealer is much more complex and utilizes several algorithms iteratively with lots of settings, here are some examples:

from meshlib import mrmeshpy as mm

def remove_small_components(mesh : mm.Mesh, minAreaRatio : float ):
    mesh.deleteFaces(mesh.topology.getValidFaces() - mm.MeshComponents.getLargeByAreaComponents(mesh,minAreaRatio*mesh.area(),None))

def close_small_holes(mesh : mm.Mesh, maxParimeter : float):
    mesh.deleteFaces(mm.findHoleComplicatingFaces(mesh))
    holeIds = mesh.topology.findHoleRepresentiveEdges()
    smallHoleIds = []
    for i in range(len(holeIds)):
        if mesh.holePerimiter(holeIds[i]) < maxParimeter:
            smallHoleIds.append(holeIds[i])
    fillSettings = mm.FillHoleNicelySettings()
    fillSettings.triangulateParams.metric = mm.getMinAreaMetric(mesh)
    fillSettings.triangulateParams.multipleEdgesResolveMode = mm.FillHoleParams.MultipleEdgesResolveMode.Strong
    fillSettings.maxEdgeLen = mesh.averageEdgeLength()
    fillSettings.triangulateOnly = False
    fillSettings.smoothCurvature = False
    fillSettings.maxEdgeSplits = 20000
    for smallHoleId in smallHoleIds:
        mm.fillHoleNicely(mesh,smallHoleId,fillSettings)

def fix_self_intersections(mesh:mm.Mesh):
    params = mm.SelfIntersections.Settings()
    params.maxExpand = 2
    params.relaxIterations = 2
    params.method = mm.SelfIntersections.Settings.Method.CutAndFill
    params.touchIsIntersection = False # required to disable subdivision on fixing self-intersections
    print(params.subdivideEdgeLen)
    mm.SelfIntersections.fix(mesh,params)

def fix_degeneracies( mesh : mm.Mesh, tolerance : float, force : bool ):
    mm.fixMultipleEdges(mesh)
    params = mm.FixMeshDegeneraciesParams()
    params.maxDeviation = 0.1*tolerance
    params.tinyEdgeLength = 0.01*tolerance
    params.criticalTriAspectRatio = 1e3
    params.mode = mm.FixMeshDegeneraciesParams.Mode.Remesh
    if force:
        params.mode = mm.FixMeshDegeneraciesParams.Mode.RemeshPatch
    mm.fixMeshDegeneracies(mesh,params)

Usually, we recommend users to adjust script for their specific data.

[Grantim]

#5218 updating example scripts

[osmaoui]

Thanks a lot @Grantim 🙏
Really appreciate your detailed explanation and the quick update to the example scripts.