0025206: Fillet creates edge with C0 continuity

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Date Submitted

Last Update

0025206

Community

[OCCT] OCCT:Modeling Algorithms

public

2014-09-01 17:10

2020-09-14 22:56

Reporter

shoogen

Assigned To

ifv

Priority

normal

Severity

minor

Status

new

Resolution

open

Platform

Linux

Debian 6.0

OS Version

64 bit

Product Version

[OCCT] 6.7.1

Target Version

[OCCT] 7.6.0*

Fixed in Version

Summary

0025206: Fillet creates edge with C0 continuity

Description

The result of the fillet contains faces with C0 continuity, which makes the result unusable for a later operations.
The offending edge has a degree of 9 and the second (or second last) knot has a multiplicity of 9.

part of
dump e8
-------
Dump of 2 surfaces
-------

   1 : BSplineSurface urational vrational
  Degrees :2 9
  NbPoles :3 67
  NbKnots :2 9

VKnots :
   1 : 367.719855980534 10
   2 : 373.287258543889 8
...
   7 : 389.161717280444 8
   8 : 394.02805763465 9 <<<------- C0 continuity
   9 : 400.702594650899 10

Steps To Reproduce

pload MODELING
restore lampe-1-draw-Fusion.brep Fusion
explode Fusion E
blend Fillet Fusion 25 Fusion_4 25 Fusion_5 25 Fusion_6 25 Fusion_7 25 Fusion_8 25 Fusion_9 25 Fusion_10 25 Fusion_11 25 Fusion_12
explode Fillet E
renamevar Fillet_8 e8
#dump e8

Tags

No tags attached.

Test case number

bugs modalg_7 bug25206

Attached Files

lampe-1-draw-Fusion.brep (240,253 bytes) 2014-09-01 17:10

Relationships

Notes
(0032088) shoogen (reporter) 2014-09-24 14:19	might be affected by CR23547 -> retest

(0032267) shoogen (reporter) 2014-09-26 18:42	Seems that it worked in version 6.3.0

(0032271) abv (manager) 2014-09-26 19:46	It worked in 6.5.0, but 6.6.0 already produces C0 geometry

(0069104) apv (tester) 2017-08-04 10:23	Problem described in issue is reproduced on current state of OCCT.

Issue History
Date Modified	Username	Field	Change
2014-09-01 17:10	shoogen	New Issue
2014-09-01 17:10	shoogen	Assigned To	=> ifv
2014-09-01 17:10	shoogen	File Added: lampe-1-draw-Fusion.brep
2014-09-11 18:06	abv	Target Version	=> 7.1.0
2014-09-24 14:19	shoogen	Note Added: 0032088
2014-09-26 18:42	shoogen	Note Added: 0032267
2014-09-26 19:46	abv	Note Added: 0032271
2016-10-28 11:54	msv	Target Version	7.1.0 => 7.2.0
2017-07-21 11:34	msv	Target Version	7.2.0 => 7.3.0
2017-08-04 10:23	apv	Test case number	=> bugs modalg_7 bug25206
2017-08-04 10:23	apv	Note Added: 0069104
2017-12-05 17:01	msv	Target Version	7.3.0 => 7.4.0
2019-08-12 16:43	msv	Target Version	7.4.0 => 7.5.0
2020-09-14 22:56	msv	Target Version	7.5.0 => 7.6.0*