0028119: Blend fails on fused identical but shifted tori

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Project

Category

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Date Submitted

Last Update

0028119

Community

[OCCT] OCCT:Modeling Algorithms

public

2016-11-17 10:09

2018-08-03 11:30

Reporter

ickby

Assigned To

msv

Priority

normal

Severity

minor

Status

new

Resolution

open

Platform

Windows

Windows 7

OS Version

Windows 7

Product Version

[OCCT] 7.0.0

Target Version

Fixed in Version

Summary

0028119: Blend fails on fused identical but shifted tori

Description

When fusing two identical and shifted tori the blending of the intersection edges fails. If the second radius of the two tori have a small difference the blend works fine.

When using draw.exe fubl on the identical tori does give a result, but it does not have blended edges. If blended manually the blend operation does not give a result.

Detected with FreeCAD0.17 and occ7.0 and reproduced with occ7.1beta draw.exe

Steps To Reproduce

# works NOT with identical secondary radi
pload ALL
ptorus t1 100 10
ptorus t2 100 10
ttranslate t2 100 0 0
fubl res t1 t2 5
vinit
vdisplay res
vfit

# works with large difference in secondary radi
pload ALL
ptorus t1 100 10
ptorus t2 100 9.9
ttranslate t2 100 0 0
fubl res t1 t2 5
vinit
vdisplay res
vfit

# works NOT with small differece in secondary radi
pload ALL
ptorus t1 100 10
ptorus t2 100 9.99
ttranslate t2 100 0 0
fubl res t1 t2 5
vinit
vdisplay res
vfit

Tags

No tags attached.

Test case number

bugs modalg_7 bug28119_1, bug28119_2, bug28119_3

Attached Files

Relationships

related to

0029910

assigned

msv

Open CASCADE

Porting to Debian80-64 : Regressions in Modeling Algorithms

Notes
(0069201) ickby (reporter) 2017-08-08 14:13	Still fails on OCC 7.2beta. Update of draw command was needed: pload ALL ptorus t1 100 10 ptorus t2 100 10 ttranslate t2 100 0 0 bfuseblend res t1 t2 2 # Error: Cannot find the result of BLEND-operation. The result of BOP operation will be returned.

(0069784) mkv (tester) 2017-08-23 14:05	Problem described in issue is reproduced on current state of OCCT.

Issue History
Date Modified	Username	Field	Change
2016-11-17 10:09	ickby	New Issue
2016-11-17 10:09	ickby	Assigned To	=> msv
2017-08-08 14:13	ickby	Note Added: 0069201
2017-08-23 14:05	mkv	Test case number	=> bugs modalg_7 bug28119_1, bug28119_2, bug28119_3
2017-08-23 14:05	mkv	Note Added: 0069784
2018-08-03 11:30	nbv	Relationship added	related to 0029910