97 lines
4.1 KiB
HTML
97 lines
4.1 KiB
HTML
<html><head><title>Macro Extract Wires from Mesh</title><meta http-equiv="Content-Type" content="text/html; charset=utf-8"><link type='text/css' href='wiki.css' rel='stylesheet'></head><body><h1>Macro Extract Wires from Mesh</h1></div>
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<div id="mw-content-text" lang="en" dir="ltr" class="mw-content-ltr"><div class="mw-parser-output"><table class="fcinfobox wikitable ct" width="100%" style="float: right; width: 230px; margin-left: 10px;">
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<tr>
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<td class="ctTitle">
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<h3><span class="mw-headline" id="Macro_Extract_Wires_from_Mesh"><a href="https://www.freecadweb.org/wiki/index.php?title=File:Text-x-python.png" class="image"><img alt="Text-x-python.png" src="32px-Text-x-python.png" width="32" height="32" srcset="/wiki/images/2/2c/Text-x-python.png 1.5x" /></a> Macro Extract Wires from Mesh</span></h3>
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<th class="ctOdd">Description
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<td class="ctEven left macro-description">Extracts boundary wires from selected meshes
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<th class="ctOdd">Author
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<td class="ctEven macro-author"><a href="https://www.freecadweb.org/wiki/index.php?title=User:Yorik" title="User:Yorik">Yorik</a>
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<th class="ctOdd">Links
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<td class="ctEven"><a href="Macros_recipes.html" title="Macros recipes">Macros recipes</a><br /><a href="How_to_install_macros.html" title="How to install macros">How to install macros</a><br /><a href="Customize_Toolbars.html" title="Customize Toolbars">How to customize toolbars</a>
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<th class="ctOdd">Version
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<td class="ctEven macro-version">1
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<th class="ctOdd">Date last modification
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<td class="ctEven macro-date">2016-12-17
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<td class="ctToc"><br /><div id="toc" class="toc"><div class="toctitle"><h2>Contents</h2></div>
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<ul>
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<li class="toclevel-1"><a href="#Macro_Extract_Wires_from_Mesh"><span class="tocnumber">1</span> <span class="toctext">Macro Extract Wires from Mesh</span></a></li>
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<li class="toclevel-1 tocsection-1"><a href="#Description"><span class="tocnumber">2</span> <span class="toctext">Description</span></a></li>
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<li class="toclevel-1 tocsection-2"><a href="#Script"><span class="tocnumber">3</span> <span class="toctext">Script</span></a></li>
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</ul>
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</table>
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<p><br />
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</p>
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<h2><span class="mw-headline" id="Description">Description</span></h2>
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<p>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.
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</p>
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<h2><span class="mw-headline" id="Script">Script</span></h2>
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<pre>#!/usr/bin/python
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# This macro will extract wires from selected meshes
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# The result is a new Part Compound containing wires, one per original mesh object
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# The selected meshes will be hidden but still selected after the operation.
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# Warning, it takes a bit of time...
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import FreeCAD,FreeCADGui,Part,Draft,DraftGeomUtils,Mesh
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for obj in FreeCADGui.Selection.getSelection():
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if obj.isDerivedFrom("Mesh::Feature"):
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shape = Part.Shape()
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shape.makeShapeFromMesh(obj.Mesh.Topology,0.1)
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edges = []
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lut = {}
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for f in shape.Faces:
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for e in f.Edges:
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lut.setdefault(e.hashCode(),[]).append(e)
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for k,v in lut.items():
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if len(v) == 1:
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edges.extend(v)
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if edges:
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wires = DraftGeomUtils.findWires(edges)
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if wires:
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Part.show(Part.makeCompound(wires))
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obj.ViewObject.hide() </pre>
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</div>
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</div>
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</div><div class="printfooter">
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Online version: "<a dir="ltr" href="https://www.freecadweb.org/wiki/index.php?title=Macro_Extract_Wires_from_Mesh&oldid=240067">http://www.freecadweb.org/wiki/index.php?title=Macro_Extract_Wires_from_Mesh&oldid=240067</a>"</div>
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<h2>Navigation menu</h2>
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