bugGNU Octave - Bugs: bug #46341, orientation of triangles from...

 
 

bug #46341: orientation of triangles from delaunay random

Submitter:  None
Submitted:  Fri 30 Oct 2015 09:28:20 PM UTC
   
 
Category:  Octave Function Severity:  3 - Normal
Priority:  5 - Normal Item Group:  Matlab Compatibility
Status:  Fixed Assigned to:  None
Originator Name:  Originator Email:  -email is unavailable-
Open/Closed:  * Closed Release:  * 4.0.0
Operating System:  * Any Fixed Release:  None
Planned Release:  None
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Fri 30 Sep 2022 01:51:04 PM UTC, comment #2: 

noting that a patch has been pushed to bug #53397 that fixes this bug and enforces positive normal vectors for all input dimensions >=2D.

Nicholas Jankowski <nrjank>
Group Member
Sun 01 Nov 2015 11:06:55 AM UTC, comment #1: 

Hi,

Thanks for your report. Actually ML doc does not mention the order in which vertices are returned so it is not clear that Octave should reorder vertices to follow this behavior.
I leave "Matlab compatibility" as item group for the time being, but we don't generally consider those undocumented behaviors as hard constraints.
On the other hand if you provide us with a practical case in which the order of vertices is critical then we could decide to change this in Octave. Reordering on the basis of the value of the rotational can be vectorized and the fast.

Pantxo Diribarne <pantxo>
Group Member
Fri 30 Oct 2015 09:28:20 PM UTC, original submission:  

Attached script del.m reports the orientation of the triangles in a delaunay triangulation.

On matlab it will always report "clockwise" for all triangles,
on octave the orientaion of the triangles seems to be random.

Anonymous

 

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Attached Files
file #35336:  del.m added by None (376B - application/vnd.wolfram.mathematica.package)

 

Depends on the following items: None found

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   bug dependencies.

 

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  • -email is unavailable- added by nrjank (Posted a comment)
  • -email is unavailable- added by rik5 (Updated the item)
  • -email is unavailable- added by pantxo (Posted a comment)
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    Follow 5 latest changes.

    Date Changed by Updated Field Previous Value => Replaced by
    2022-09-30 nrjank StatusNeed Info Fixed
    2018-04-29 rik5 Dependencies- bugs #53397 is dependent
    2016-11-23 rik5 Open/ClosedOpen Closed
    2015-11-01 pantxo StatusNone Need Info
    2015-10-30 None Attached File- Added del.m, #35336

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