How to use inflate() method

[ParvGuptaSpCT]

Hello Devs!!

I'm trying to inflate the portion of my mesh, I have tried inflate() method but the results were far different from the UI.
can you please provide an example for better understanding

Steps to follow:

1. Fill hole in the mesh (i used fillHoleNicely() explained here)
2. Inflate the new faces with pressure value set to 5

Thanks

[Grantim]

Hello!

Could you please provide small code example with data (or screenshots of desired result and achieved one), so we can reproduce the issue.
If you don't want to share your data publicly you can send it to [email protected]

[ParvGuptaSpCT]

Hello!!
Thanks for the quick response, here are the requested screenshots
Desired result-

Result Achieved-

Thanks

[Grantim]

Could you also provide the code that you run, please?

[ParvGuptaSpCT]

for e in holesInProcessedMesh:
        params = mm.FillHoleNicelySettings()
        params.triangulateParams.metric = mm.getMinAreaMetric(resMesh)
        params.smoothCurvature = False
        # fill hole with basic settings
        fillHoleFaces = mm.fillHoleNicely(resMesh, e, params)
        if(e == maxHoleAreaId):
            newVerts = mm.VertBitSet()
            subdivSettings = mm.SubdivideSettings()
            subdivSettings.maxEdgeLen = findAverageEdgeLength(resMesh)
            subdivSettings.maxEdgeSplits = 20000
            subdivSettings.region = fillHoleFaces
            subdivSettings.newVerts = newVerts
            mm.subdivideMesh(resMesh,subdivSettings)

            inflateSettings = mm.InflateSettings()
            inflateSettings.pressure = 5
            mm.inflate(resMesh, newVerts, inflateSettings)

[Grantim]

Have you tried not to call subdivizion explicitly, but use FillHoleNicely for it, it performs subdivideMesh inside, it can be controlled with:

    /// Subdivision is stopped when all edges inside or on the boundary of the region are not longer than this value
    float maxEdgeLen = 0;

    /// Maximum number of edge splits allowed during subdivision
    int maxEdgeSplits = 1000;

then you can use getIncidentVerts or getInnerVerts function to find vertices for inflate.

Anyway the code looks OK, the result seems strange, could please provide input files?

[ParvGuptaSpCT]

Hello @Grantim, I have shared the input mesh over e-mail.

[Grantim]

Hello @ParvGuptaSpCT!

I've got your data and managed to achieve desired result with code like this:

from meshlib import mrmeshpy as mm

mesh = mm.loadMesh("input mesh.stl")

params = mm.FillHoleNicelySettings()
params.maxEdgeSplits = 1000000 # just a big number not to stop subdivision by this criteria
params.maxEdgeLen = mesh.averageEdgeLength() # stop subdivision by this criteria

holeEdges = mesh.topology.findHoleRepresentiveEdges()
maxAreaHole = mm.EdgeId()
maxHoleAreaSq = 0

# find max area hole
for e in holeEdges:
    areaSq = mesh.holeDirArea(e).lengthSq()
    if (areaSq > maxHoleAreaSq):
        maxHoleAreaSq = areaSq
        maxAreaHole = e

# fill holes
for e in holeEdges:
    params.smoothCurvature = bool(e != maxAreaHole) # smooth curvature does not make sense if inflation is applied afterwards
    newFaces = mm.fillHoleNicely(mesh,e,params)
    if (e==maxAreaHole):
        newVerts = mm.getInnerVerts(mesh.topology,newFaces)
        infParams = mm.InflateSettings()
        infParams.pressure = 5
        mm.inflate(mesh,newVerts,infParams)

mm.saveMesh(mesh,"output mesh.stl")

Could you please verify that it works for you?