0031172: Unexpected result of BRepTools::OuterWire() - MantisBT

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ID

Project

Category

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Date Submitted

Last Update

0031172

Open CASCADE

[OCCT] OCCT:Modeling Algorithms

public

2019-11-17 23:19

2019-11-17 23:31

Reporter

ssv

Assigned To

msv

Priority

normal

Severity

minor

Status

new

Resolution

open

Platform

Windows

OS

VC++ 2013

OS Version

64 bit

Product Version

Target Version

[OCCT] 7.5.0*

Fixed in Version

Summary

0031172: Unexpected result of BRepTools::OuterWire()

Description

The attached face contains three wires touching each other at vertices. As a result of BRepTools::OuterWire(), the incorrect wire is returned (the tool returns one of the circles instead of the outer contour).

Tags

No tags attached.

Test case number

test-face.brep (2,916 bytes) 2019-11-17 23:19

outer-wire-01.png (5,214 bytes) 2019-11-17 23:19

Relationships

Notes
(0089037) ssv (developer) 2019-11-17 23:31	In BRepTools::OuterWire(), lines 620-623, there is an 'if' statement comparing double values like follows: if ((umin <= UMin) && (umax >= UMax) && (vmin <= VMin) && (vmax >= VMax)) ... It is likely a good idea to use at least PConfusion() instead of naive equality checks which do not work for the provided test case.

Issue History
Date Modified	Username	Field	Change
2019-11-17 23:19	ssv	New Issue
2019-11-17 23:19	ssv	Assigned To	=> msv
2019-11-17 23:19	ssv	File Added: test-face.brep
2019-11-17 23:19	ssv	File Added: outer-wire-01.png
2019-11-17 23:31	ssv	Note Added: 0089037

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