FreeCADView Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0001465 | FreeCAD | Bug | public | 2014-03-07 19:57 | 2014-03-11 02:10 |
| Reporter | beamer146 | Assigned To | wmayer | ||
| Priority | normal | Severity | minor | Reproducibility | always |
| Status | closed | Resolution | fixed | ||
| Platform | All | OS | All | OS Version | All |
| Product Version | trunk | ||||
| Fixed in Version | 0.14 | ||||
| Summary | 0001465: scale() operation makes face invalid | ||||
| Description | Applying the scale operation on eg a copy of a face of a box makes the face invalid. Doing further operations on the face (eg extruding) then leads to incorrect shapes. (it is also strange that the wire of a face is not closed, however this does not seem to be a problem) Sample program: from __future__ import division # allows floating point division from integers # first of all you need the Part nd ( the Drawing module: import FreeCAD, Part, Drawing, Draft from FreeCAD import Base # For printing varnames import inspect, re import math def clearDoc( a_doc ): l_aoAllObjs = a_doc.Objects for l_objCur in l_aoAllObjs: a_doc.removeObject( l_objCur.Name ) m_doc=FreeCAD.activeDocument() if (m_doc== None): m_doc = FreeCAD.newDocument() clearDoc( m_doc ) l_mdlBox=Part.makeBox(2,3,4) l_vobBox= m_doc.addObject("Part::Feature", "vobBox") l_vobBox.Shape = l_mdlBox l_faceCur = l_mdlBox.Faces[ 3 ] FreeCAD.Console.PrintMessage( "Face index 3 : Nb Wires: " + str(len(l_faceCur.Wires ))+", Wire 0 closed ? " + str(l_faceCur.Wires[0].isClosed()) + "\n") l_vctNormal = l_faceCur.normalAt( 0.5, 0.5 ) l_faceCopy = l_faceCur.copy() # Note that if I do not add this scale operation, the wire is still not closed but faceCopy2 is valid. FreeCAD.Console.PrintMessage( "faceCopy valid before scale? " + str(l_faceCopy.isValid()) + "\n") l_faceCopy.scale( 2.0, Base.Vector(2,3,4) ) FreeCAD.Console.PrintMessage( "faceCopy valid after scale ? " + str(l_faceCopy.isValid()) + "\n") Sample Program output (most recent version I tried was 0.14 3167 2014/0218 22:05:48 on Linux, but eg the 0.13 release for windows has it as well): Face index 3 : Nb Wires: 1, Wire 0 closed ? False faceCopy valid before scale? True faceCopy valid after scale ? False | ||||
| Steps To Reproduce | See description | ||||
| Additional Information | http://forum.freecadweb.org/viewtopic.php?f=22&t=5376&p=43087&hilit=faceCopy.scale#p43087 | ||||
| Tags | No tags attached. | ||||
| FreeCAD Information | |||||
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> it is also strange that the wire of a face is not closed, however this does not seem to be a problem When querying the wire whether it's closed then only a flag of the TopoDS_Shape class is checked, it doesn't do a geometric check at this time. I don't know if OCC simply forgot to set this flag or if it is intentional. > scale() operation makes face invalid Apparently you haven't tested this with the latest trunk. There was a fix on the copy() method which fixes this issue as well. https://github.com/FreeCAD/FreeCAD_sf_master/commit/92253429c5cf3ebf8a308d3c563d423b29aacdd3 |
| Date Modified | Username | Field | Change |
|---|---|---|---|
| 2014-03-07 19:57 | beamer146 | New Issue | |
| 2014-03-08 09:37 | wmayer | Note Added: 0004391 | |
| 2014-03-08 09:38 | wmayer | Relationship added | related to 0001463 |
| 2014-03-08 11:42 | wmayer | Note Edited: 0004391 | |
| 2014-03-10 10:02 | wmayer | Status | new => resolved |
| 2014-03-10 10:02 | wmayer | Fixed in Version | => 0.14 |
| 2014-03-10 10:02 | wmayer | Resolution | open => fixed |
| 2014-03-10 10:02 | wmayer | Assigned To | => wmayer |
| 2014-03-11 02:10 | yorik | Status | resolved => closed |
