0026269: Extrema package revision - MantisBT

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ID

Project

Category

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Date Submitted

Last Update

0026269

Open CASCADE

[OCCT] OCCT:Modeling Algorithms

public

2015-05-26 13:53

2021-05-14 17:34

Reporter

aml

Assigned To

ifv

Priority

low

Severity

tweak

Status

assigned

Resolution

open

Platform

OS

OS Version

Product Version

[OCCT] 6.9.0

Target Version

[OCCT] Unscheduled

Fixed in Version

Summary

0026269: Extrema package revision

Description

There are several problems with extrema package and its API:

1) Inconsistent handling of extrema results in "extrema" and "2dextrema" commands. In "extrema" command flag "myIsPar" is used, in "2dextrema" it is not used.

2) Analytical extrema does not take into account trimmed input data. (case 1, case 2)

3) In GeomAPI "myIsPar" is used incorrectly or not used at all.

I
I propose to change "myIsPar" to "myIsInfSol", which will cover situation with infinity solutions, not only parallel case. Change API and DRAW commands to work with this new variable.

II
Fix analytical extrema to work with trimmed data.

Steps To Reproduce

#case 1
line l1 0 0 0 1 0 0
line l2 2 0 0 1 0 0
trim l1 l1 0 1
trim l2 l2 0 1
extrema l1 l2

#case 2
circle c1 0 0 0 10
circle c2 0 0 0 5
trim c1 c1 0 1
trim c2 c2 3 4
extrema c1 c2

Tags

No tags attached.

Test case number

Relationships

related to	0026184	closed	bugmaster	Open CASCADE	GeomAPI_ExtremaCurveCurve hangs on parallel b-spline curves
related to	0026063	closed	bugmaster	Open CASCADE	GeomAPI_ExtremaCurveSurface have inexact API
related to	0026075	closed	bugmaster	Open CASCADE	Make Extrema_GenExtCC return IsParallel flag in case of parallel curves
parent of	0027162	closed	abv	Open CASCADE	Draw command "(2d)extrema" incorrectly represent underlying algorithm results
related to	0022560	assigned	jgv	Community	Extrema redesign
related to	0022525	assigned	jgv	Open CASCADE	Improvement of Extrema

Notes
(0042531) aml (developer) 2015-06-29 12:11 edited on: 2015-06-29 12:12	ExtremaPC: I 1) bad format of output: proj c 3.0 3.0 2.0 parameter 1 = 1.1738953633378706 ext_1 parameter 2 = 2.1611867552406454 ext_2 parameter 3 = 3.5000000059308389 ext_3 parameter 4 = 5.0399884503606023 ext_4 parameter 5 = 5.4804063007678074 ext_5 parameter 6 = 6.2485611263687888 ext_6 parameter 7 = 6.7381612209715556 ext_7 parameter 8 = 1.1738953633378706 ext_8 2) French comments: proj c 3.999999652077201 5.0000000062915735 5.00002142991819367 parameter 1 = 0.99910795389207607 ext_1 Le point est sur la courbe. Son parametre est U = 0.99910795389207607 II There is no duplicates handling.

(0042533) msv (developer) 2015-06-29 12:18	Andrey, please validate this bug fix.

(0042535) abv (manager) 2015-06-29 12:40	I deem the proposed changes are quite reasonable, let's proceed (with low priority)

Issue History
Date Modified	Username	Field	Change
2015-05-26 13:53	aml	New Issue
2015-05-26 13:53	aml	Assigned To	=> msv
2015-05-26 13:54	aml	Relationship added	related to 0026184
2015-05-26 13:54	aml	Relationship added	related to 0026063
2015-05-26 13:55	aml	Relationship added	related to 0026075
2015-05-26 13:56	aml	Description Updated	View Revisions
2015-05-26 15:02	msv	Description Updated	View Revisions
2015-06-29 12:09	aml	Relationship added	related to 0026351
2015-06-29 12:11	aml	Note Added: 0042531
2015-06-29 12:12	aml	Note Edited: 0042531	View Revisions
2015-06-29 12:18	msv	Note Added: 0042533
2015-06-29 12:18	msv	Assigned To	msv => abv
2015-06-29 12:18	msv	Severity	minor => tweak
2015-06-29 12:40	abv	Note Added: 0042535
2015-06-29 12:40	abv	Assigned To	abv => aml
2015-06-29 12:40	abv	Priority	normal => low
2015-06-29 12:40	abv	Status	new => assigned
2016-02-16 14:02	aml	Relationship added	parent of 0027162
2016-07-07 07:04	aml	Relationship added	related to 0022560
2016-07-07 07:04	aml	Relationship added	related to 0022525
2016-10-28 16:32	msv	Target Version	7.1.0 => 7.2.0
2017-07-24 09:25	msv	Target Version	7.2.0 => Unscheduled
2021-05-14 17:34	szy	Assigned To	aml => ifv

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