How to union mesh with many connected components in python?

[jesuchristu]

Hi,
I would like to achieve functionality of the 'Unite meshes' function from MeshInspector, but using Meshlib and Python.
I have a mesh with many connected components, which ones i want to union in one manifold/watertight mesh in a possible efficient way.

I see the uniteManyMeshes(), getAllComponents() functions in the API, but honestly, I'm not sure how to work with them.

Thank for help.

[Grantim]

Hello!

Such code should work for you:

from meshlib import mrmeshpy as mm

# load mesh with several components
mesh = mm.loadMesh("in/path/filename.stl")

# separate components 
components = mm.getAllComponents(mesh)

meshes = []
vecMeshes = mm.vectorConstMeshPtr()
vecMeshes.resize(len(components))
for i in range(len(components)):
    # create meshes from separated components
    meshes.append(mm.Mesh())
    meshes[i].addPartByMask(mesh,components[i])
    vecMeshes[i] = meshes[i]

# commented part will be available in next release and will provide better result for cases with nested components
#params = mm.UniteManyMeshesParams()
#params.nestedComponentsMode = mm.NestedComponenetsMode.Merge
#resMesh = mm.uniteManyMeshes(vecMeshes, params)

# unite separated meshes
resMesh = mm.uniteManyMeshes(vecMeshes)

# save united mesh
mm.saveMesh(resMesh,"out/path/filename.stl")

[jesuchristu]

Works perfectly, thank you for the quick response!