0032239: Data Exchange, STEP import - bounding box is too large - MantisBT

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ID

Project

Category

View Status

Date Submitted

Last Update

0032239

Community

[OCCT] OCCT:Data Exchange

public

2021-03-22 20:45

2021-09-25 17:51

Reporter

robertlipman

Assigned To

gka

Priority

normal

Severity

major

Status

new

Resolution

open

Platform

OS

OS Version

Product Version

[OCCT] 6.3.1

Target Version

[OCCT] 7.6.0*

Fixed in Version

Summary

0032239: Data Exchange, STEP import - bounding box is too large

Description

The bounding box is too large for the attached STEP file. The X range as reported by CAD Assistant is 157.233mm. However, measuring the X range in another viewer (eDrawings) shows 106.182mm. The Y and Z range is also too large.

Steps To Reproduce

Open the attached file in CAD Assistant and get the range. Measure the range some other way and compare the values.

pload XDE OCAF VISUALIZATION MODELING
dtracelevel trace
testreadstep {UTG RED DOT OPTIC.STEP} s
checkshape s s
bounding s

Output:

 -- The Shape s has problems :
  Check                                    Count
 ------------------------------------------------
  Unorientable Shape ....................... 4
  Not Closed ............................... 4
 ------------------------------------------------
*** Shapes with problems : 8
WIRE    :  4 Items -> compound named s_w
FACE    :  4 Items -> compound named s_f

-82.043211434255824 -97.41395356722937 -97.41395356722937 73.632312330445473 97.41395356722937 97.41395356722937

Tags

No tags attached.

Test case number

UTG RED DOT OPTIC.zip (3,694,975 bytes) 2021-03-22 20:45

optic_KO.png (25,608 bytes) 2021-09-25 17:39

optic_lenses_KO.png (8,318 bytes) 2021-09-25 17:39

Relationships

(0104375)
kgv (developer)
2021-09-25 17:49
edited on: 2021-09-25 17:51

STEP import produces 4 unorientable Faces (for lenses).
So the problem could be reformulated as fixing STEP import to produce a valid shape (or to determine that specific STEP file is invalid and has no proper fix).

Afterwards, bounding box on fixed shape should has expected dimensions.

 -- The Shape s has problems :
  Check                                    Count
 ------------------------------------------------
  Unorientable Shape ....................... 4
  Not Closed ............................... 4
 ------------------------------------------------
*** Shapes with problems : 8
WIRE    :  4 Items -> compound named s_w
FACE    :  4 Items -> compound named s_f

-82.043211434255824 -97.41395356722937 -97.41395356722937 73.632312330445473 97.41395356722937 97.41395356722937

Issue History
Date Modified	Username	Field	Change
2021-03-22 20:45	robertlipman	New Issue
2021-03-22 20:45	robertlipman	Assigned To	=> gka
2021-03-22 20:45	robertlipman	File Added: UTG RED DOT OPTIC.zip
2021-03-24 10:14	kgv	Target Version	=> 7.6.0*
2021-03-24 10:14	kgv	Summary	Bounding box to large => BRepBndLib returns too large Bounding Box
2021-09-25 17:39	kgv	File Added: optic_KO.png
2021-09-25 17:39	kgv	File Added: optic_lenses_KO.png
2021-09-25 17:39	kgv	Steps to Reproduce Updated	View Revisions
2021-09-25 17:43	kgv	Product Version	7.5.0 => 6.3.1
2021-09-25 17:44	kgv	Steps to Reproduce Updated	View Revisions
2021-09-25 17:45	kgv	Summary	BRepBndLib returns too large Bounding Box => Data Exchange, STEP import - BRepBndLib returns too large Bounding Box
2021-09-25 17:49	kgv	Note Added: 0104375
2021-09-25 17:49	kgv	Note Edited: 0104375	View Revisions
2021-09-25 17:50	kgv	Note Edited: 0104375	View Revisions
2021-09-25 17:50	kgv	Note Edited: 0104375	View Revisions
2021-09-25 17:51	kgv	Note Edited: 0104375	View Revisions
2021-09-25 17:51	kgv	Summary	Data Exchange, STEP import - BRepBndLib returns too large Bounding Box => Data Exchange, STEP import - bounding box is too large

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