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IDProjectCategoryView StatusDate SubmittedLast Update
0027785Community[OCCT] OCCT:Modeling Algorithmspublic2016-08-17 11:362017-08-08 14:17
Reporterickby 
Assigned Tomsv 
PrioritynormalSeveritymajor 
StatusnewResolutionopen 
PlatformWindowsOSVC++ 2013OS Version64 bit
Product Version[OCCT] 7.0.0 
Target VersionFixed in Version 
Summary0027785: Thickness operation "warps" shape at seam edge
DescriptionApplying a thickness on this special cylinder + draft + fillet part creates a deformed shape at the seam edge. There the flat top face gets an evalation. Note tha tthis effect does not appear when one uses different draft settings, it seems this happens only under very specific circumstances. See Issue 0027784 for a quite similar cylinder + draft + fillet + thickness operation that works fine.


Steps To Reproducepload MODELING;
pload VISUALIZATION;

pcylinder cyl 50 30;
explode cyl f;
depouille draft cyl 0 0 1 cyl_1 20 0 0 0 0 0 1;

explode draft e;
blend fillet draft 10 draft_1;
explode fillet f;
offsetcompshape thick fillet -5 fillet_3;

vinit;
vdisplay thick;
vbottom;
vrotate 1 1 20;
TagsNo tags attached.
Test case number
Attached Filespng file icon thickness.png (46,147 bytes) 2016-08-17 11:36
png file icon hang_edge.PNG (17,383 bytes) 2016-08-17 16:42

- Relationships
related to 0027784closedbugmaster Thickness fails on cylinder with draft 

-  Notes
(0056779)
ickby (reporter)
2016-08-17 11:38

The problem was found with FreeCAD 0.17 and OCC7.0.

Note that somehow the provided draw script does not work with the "source" command, but copy paste into draw.exe works.
(0056790)
msv (developer)
2016-08-17 15:37

The script contains an error - the command "dep" is not found. Shortened names of commands are not allowed in a script. I have updated it.
(0056794)
ickby (reporter)
2016-08-17 16:28

Interesting note from our discussion @FreeCAD forum:
"Export this file to stp and after open in any CAD is geometry all right. Probably is issue in graphics rendering."

http://forum.freecadweb.org/viewtopic.php?f=19&p=134532#p134532 [^]
(0056796)
msv (developer)
2016-08-17 16:43

It is not rendering error, because we can see the hanging end of an edge in the draw view (see the attached hang_edge.png).
(0069202)
ickby (reporter)
2017-08-08 14:17

The issue is still reproduced in OCC7.2 beta

- Issue History
Date Modified Username Field Change
2016-08-17 11:36 ickby New Issue
2016-08-17 11:36 ickby Assigned To => msv
2016-08-17 11:36 ickby File Added: thickness.png
2016-08-17 11:38 ickby Note Added: 0056779
2016-08-17 15:36 msv Relationship added related to 0027784
2016-08-17 15:36 msv Steps to Reproduce Updated View Revisions
2016-08-17 15:37 msv Note Added: 0056790
2016-08-17 16:28 ickby Note Added: 0056794
2016-08-17 16:42 msv File Added: hang_edge.PNG
2016-08-17 16:43 msv Note Added: 0056796
2017-08-08 14:17 ickby Note Added: 0069202


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