.ply export works in meshlab, but fails in PyMeshLab (with identical steps and data)

[KeithT]

The steps in MeshLab: File->Import Test0001.asc Filters->Normals, Curv....->Compuete normals for points sets (with default settings) Filters ->Remeshing..->Surface Reconstruction Screen Poisson (with default settings) File - Export Mesh Test0001.ply Generates a .ply without issues.

Doing the same from PyMeshLab by saving the filter script and then running the following python code generates a .ply that can't be opened. Meshlab reports. "Bad vertex index in face"

ms = ml.MeshSet()
ms.set_versbosity(True)
ms.load_new_mesh(filename)
ms.load_filter_script('D:\MeshLab\PointsToMesh.mlx')
ms.apply_filter_script()
tempMeshName = filename[-12:]
newMeshName = tempMeshName[0:8]
newPath = path + newMeshName + '.ply'
ms.save_current_mesh(newPath)

.asc and .mlx in attached .zip

test0001.zip

(It's great to be able to access meshlab from python, thank you for this 🥇

[alemuntoni]

Hi @KeithT, thanks for reporting this! We are aware of this issue: it is actually related to the double precision version of meshlab. It should be already solved (see https://github.com/cnr-isti-vclab/meshlab/issues/859 and https://github.com/cnr-isti-vclab/meshlab/pull/860), but I'll check if there are still other issues. The fix will be available in the next pymeshlab release, but in the meantime a workaround is to save the ply file without binary encoding:

ms.save_current_mesh(newPath, binary=False)

(Thanks for the feedback, very appreciated! :) )

[KeithT]

Great, thanks for the workaround, that worked.