Macro Extract Wires from Mesh: Difference between revisions
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{{Macro|Icon=Text-x-python|Name=Macro Extract Wires from Mesh|Description=Extracts boundary wires from selected meshes|Author=Yorik|Version=1|Date= |
{{Macro|Icon=Text-x-python|Name=Macro Extract Wires from Mesh|Description=Extracts boundary wires from selected meshes|Author=Yorik|Version=1|Date=17/12/2016}} |
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Revision as of 12:22, 27 September 2017
File:Text-x-python Macro Extract Wires from Mesh |
Description |
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Extracts boundary wires from selected meshes Macro version: 1 Last modified: 17/12/2016 Author: Yorik |
Author |
Yorik |
Download |
None |
Links |
Macros recipes How to install macros How to customize toolbars |
Macro Version |
1 |
Date last modified |
17/12/2016 |
FreeCAD Version(s) |
None |
Default shortcut |
None |
See also |
None |
Description
Finds boundary wires in selected mesh objects. Boundary wires are formed from all the edges found in the mesh that are shared by only one face, that is, they are "border" edges. The found wires get added to the document (one compound per mesh object), while the mesh itself gets hidden.
Script
#!/usr/bin/python
# This macro will extract wires from selected meshes
# The result is a new Part Compound containing wires, one per original mesh object
# The selected meshes will be hidden but still selected after the operation.
# Warning, it takes a bit of time...
import FreeCAD,FreeCADGui,Part,Draft,DraftGeomUtils,Mesh
for obj in FreeCADGui.Selection.getSelection():
if obj.isDerivedFrom("Mesh::Feature"):
shape = Part.Shape()
shape.makeShapeFromMesh(obj.Mesh.Topology,0.1)
edges = []
lut = {}
for f in shape.Faces:
for e in f.Edges:
lut.setdefault(e.hashCode(),[]).append(e)
for k,v in lut.items():
if len(v) == 1:
edges.extend(v)
if edges:
wires = DraftGeomUtils.findWires(edges)
if wires:
Part.show(Part.makeCompound(wires))
obj.ViewObject.hide()