bugGNU Octave - Bugs: bug #54848, [OpenGL Qt] zooming out or in...

 
 

bug #54848: [OpenGL Qt] zooming out or in leads to unexpected results

Submitted by:  Philip Nienhuis <philipnienhuis>
Submitted on:  Tue 16 Oct 2018 05:25:55 PM UTC  
 
Category:  Plotting with OpenGL Severity:  3 - Normal
Priority:  5 - Normal Item Group:  Unexpected Error
Status:  None Assigned to:  None
Originator Name:  Philip Nienhuis Open/Closed:  Open
Release:  dev Operating System:  Microsoft Windows

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Tue 23 Oct 2018 06:02:19 PM UTC, comment #2:

In bug #53724 a user has confirmed my findings.

Now the question beomes: is this a duplicate or a more general issue?

Philip Nienhuis <philipnienhuis>
Project Member
Tue 16 Oct 2018 08:25:38 PM UTC, comment #1:

Fltk toolkit behaves better; while continuing zooming out the plot disappears but reappears when zooming back in.

Also, Octave-4.4.1 behaves better.

Philip Nienhuis <philipnienhuis>
Project Member
Tue 16 Oct 2018 05:25:55 PM UTC, original submission:

Steps to reproduce:
1. load the attached .mat file bugXXXX.mat

2. plot the data using:

patch ("vertices", [X Y], "faces", faces, "facecolor", [0.5 0.7 0.9], "edgecolor", [0.6 0.6 0.6])

3. click Zoom in" button

4. Zoom out using scroll wheel until plotted data disappear completely (axes still visible).

5. Then zoom back in

==> Result:
No problems.

But,

6. Repeat step 2

7. Type "axis equal" in command window

8. Repeat steps 3 - 5

Result:
==> After a few zoom-out steps (9 in my case) the plot and axes suddenly disappear completely. Zooming back in they don't reappear.

In addition, after step 2 (w/o "axis equal"), zooming out (with zoom out button active) by clicking in the plot, the plot zooms out but after a few clicks in the plot often zooms back in to full extent.

In other tries, zooming in behaves similarly, the plot zooms out unexpectedly in some cases.

Philip Nienhuis <philipnienhuis>
Project Member

 

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Attach Files:
   
   
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Attached Files
file #45211:  bugXXXX.mat added by philipnienhuis (12KiB - application/octet-stream)

 

Depends on the following items: None found

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    Follow 2 latest changes.

    Date Changed by Updated Field Previous Value => Replaced by
    2018-10-16 philipnienhuis Summary[OpenGL] zooming out or in leads to unexpected results => [OpenGL Qt] zooming out or in leads to unexpected results
    2018-10-16 philipnienhuis Attached File- => Added bugXXXX.mat, #45211

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