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0027489Community[OCCT] OCCT:Modeling Datapublic2016-05-11 12:552019-08-12 16:36
Vico Liang 
ifv 
lowminor 
assignedopen 
WindowsVC++ 201264 bit
[OCCT] 6.8.0 
[OCCT] 7.5.0 
0027489: Ellipse display issue
The ellipse edge attached in Ellipse_Display.brep will help demo the issue. The displayed ellipse has large deviation from real location. You even don't know it's an ellipse from the view.
pload MODELING VISUALIZATION
restore Ellipse_Display.brep e
vclear
vinit View1
vdisplay e
vfit
No tags attached.
? Ellipse_Display.brep (386) 2016-05-11 12:55
https://tracker.dev.opencascade.org/
png Ellipse_Display.png (6,018) 2016-05-11 12:56
https://tracker.dev.opencascade.org/
png ellipse_671.png (1,793) 2016-05-23 15:17
https://tracker.dev.opencascade.org/
png ellipse_680.png (1,358) 2016-05-23 15:17
https://tracker.dev.opencascade.org/
Issue History
2016-05-11 12:55Vico LiangNew Issue
2016-05-11 12:55Vico LiangAssigned To => kgv
2016-05-11 12:55Vico LiangFile Added: Ellipse_Display.brep
2016-05-11 12:56Vico LiangFile Added: Ellipse_Display.png
2016-05-23 15:17kgvFile Added: ellipse_671.png
2016-05-23 15:17kgvFile Added: ellipse_680.png
2016-05-23 15:17kgvProduct Version6.9.1 => 6.8.0
2016-05-23 15:29kgvNote Added: 0054294
2016-05-23 15:29kgvAssigned Tokgv => msv
2016-05-23 15:29kgvCategoryOCCT:Visualization => OCCT:Modeling Data
2016-05-23 15:29kgvSteps to Reproduce Updatedbug_revision_view_page.php?rev_id=13737#r13737
2016-05-23 15:30kgvNote Edited: 0054294bug_revision_view_page.php?bugnote_id=54294#r13739
2016-05-23 15:30kgvNote Edited: 0054294bug_revision_view_page.php?bugnote_id=54294#r13740
2016-05-23 15:38msvRelationship addedduplicate of 0027108
2016-05-23 15:38msvAssigned Tomsv => ifv
2016-05-23 15:38msvPrioritynormal => low
2016-05-23 15:38msvStatusnew => assigned
2016-10-25 15:47msvTarget Version7.1.0 => 7.2.0
2017-07-20 15:30msvTarget Version7.2.0 => 7.3.0
2017-12-05 17:09msvTarget Version7.3.0 => 7.4.0*
2019-08-12 16:36msvTarget Version7.4.0* => 7.5.0

Notes
(0054294)
kgv   
2016-05-23 15:29   
(edited on: 2016-05-23 15:30)
Visualization (StdPrs_WFShape -> StdPrs_DeflectionCurve) relies on the algorithm GCPnts_TangentialDeflection
(called with Linear deflection 4.15 and Angular deflection 0.21 in this case).