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|ID||Project||Category||View Status||Date Submitted||Last Update|
|0023380||Community||[OCCT] OCCT:Modeling Algorithms||public||2012-08-15 12:56||2016-09-06 10:40|
|Product Version||[OCCT] 6.5.3|
|Target Version||Fixed in Version|
|Summary||0023380: (OCC 6.5.3 regression) BRepOffsetAPI_MakeFilling fails and leaves boundary faces with high tolerance|
|Description||When I moved from OCCT 6.5.2 to 6.5.3, I faced a problem in connection with BRepOffsetAPI_MakeFilling (which uses BRepFill_Filling / GeomPlate). In 6.5.2 for a certain case an ugly face was created. Our application realized this and tried it again after changing one boundary condition. Then the result was good.|
In 6.5.3 an exception occurs on the first try and the boundary faces are left with a very high tolerance. Then the second try fails because the tolerance is much too high.
So, my question is: Is BRepOffsetAPI_MakeFilling supposed to change the tolerances of bounding faces?
Here is my test case for Draw:
restore blower3.brep b
renamevar b_5 d
renamevar b_1 f
renamevar b_4 i
explode f E
explode d E
filling r 4 0 0 i f_1 f 1 d_3 d 1 b_2 0 b_3 0
In 6.5.3 the tolerance of f differs.
Before filling: Tolerance MAX=0.00011266018876558801
After filling: Tolerance MAX=310.17121388562828
In 6.5.2 the tolerance of f stays the same.
Is the change of tolerance of neighboring faces (used as boundary conditions) expected in filling algorithm? Was this introduced in 6.5.3?
The exception is thrown in the end of BRepFill_Filling.WireFromList().
The issue was reported on the forum:
The specified issue is checked and reproduced. The script raises an exception at the command <filling ..>, which uses BRepOffsetAPI_MakeFilling class. In any case the final tolerance (310) is too large.
It indirectly testifies that some problem exist. The raised exception in any case can't be considered as a normal flow of the algorithm.
|Tags||No tags attached.|
|Test case number|
|Attached Files||blower3.zip (416,685 bytes) 2012-08-15 12:56|
|Same behaviour in OCCT 6.8.0 beta.|
Same behaviour in OCCT 7.0.0.
I think something was done recently in order to avoid that algorithms change the tolerances of the original shapes. I didn't try this case on the current master. Or is this case different because the high tolerance is because of the normal flow of the algorithm is interupted by the exception?
|2012-08-15 12:56||Timo||New Issue|
|2012-08-15 12:56||Timo||Assigned To||=> jgv|
|2012-08-15 12:56||Timo||File Added: blower3.zip|
|2014-10-30 19:24||Timo||Note Added: 0033909|
|2016-09-06 10:39||Timo||Note Added: 0057492|
|2016-09-06 10:40||Timo||Status||new => feedback|
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