Macro MeshToPart: Difference between revisions

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==Description==

This macro converts selected meshes to parts. It has a broad tolerance, so use it only with objects that have no curves otherwise you'll get weird results
This macro converts selected meshes to parts. It has a broad tolerance, so use it only with objects that have no curves otherwise you'll get weird results


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==Link==

The discussion on the forum [http://forum.freecadweb.org/viewtopic.php?f=3&t=253&hilit=getPlanarSegments Convert mesh to solid?]

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Revision as of 17:43, 8 May 2014

File:Text-x-python MeshToPart

Description
This macro converts selected meshes to parts. It has a broad tolerance, so use it only with objects that have no curves otherwise you'll get weird results

Author: Wmayer
Author
Wmayer
Download
None
Links
Macro Version
1.0
Date last modified
None
FreeCAD Version(s)
None
Default shortcut
None
See also
None

Description

This macro converts selected meshes to parts. It has a broad tolerance, so use it only with objects that have no curves otherwise you'll get weird results


import FreeCAD,FreeCADGui,Mesh,Part,MeshPart
 
for obj in FreeCADGui.Selection.getSelection():
    if "Mesh" in obj.PropertiesList:
        faces = []      
        mesh = obj.Mesh
        segments = mesh.getPlanarSegments(0.01) # use rather strict tolerance here
 
        for i in segments:
          if len(i) > 0:
             # a segment can have inner holes
             wires = MeshPart.wireFromSegment(mesh, i)
             # we assume that the exterior boundary is that one with the biggest bounding box
             if len(wires) > 0:
                ext = None
                max_length = 0
                for i in wires:     
                   if i.BoundBox.DiagonalLength > max_length:
                      max_length = i.BoundBox.DiagonalLength
                      ext = i
                wires.remove(ext)
                # all interior wires mark a hole and must reverse their orientation, otherwise Part.Face fails
                for i in wires:
                   i.reverse()
                # make sure that the exterior wires comes as first in the lsit
                wires.insert(0, ext)
                faces.append(Part.Face(wires))
 
        shell=Part.Compound(faces)
        solid = Part.Solid(Part.Shell(faces))
        name = obj.Name
        FreeCAD.ActiveDocument.removeObject(name)
        FreeCAD.ActiveDocument.addObject("Part::Feature",name).Shape = solid

Link

The discussion on the forum Convert mesh to solid?