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[Octave-bug-tracker] [bug #55931] Plot diisappers after zooming out once
From: |
Philip Nienhuis |
Subject: |
[Octave-bug-tracker] [bug #55931] Plot diisappers after zooming out once and then clicking "Autoscale" |
Date: |
Fri, 15 Mar 2019 17:33:14 -0400 (EDT) |
User-agent: |
Mozilla/5.0 (Windows NT 6.1; WOW64; rv:51.0) Gecko/20100101 Firefox/51.0 SeaMonkey/2.48 |
URL:
<https://savannah.gnu.org/bugs/?55931>
Summary: Plot diisappers after zooming out once and then
clicking "Autoscale"
Project: GNU Octave
Submitted by: philipnienhuis
Submitted on: Fri 15 Mar 2019 10:33:13 PM CET
Category: Plotting with OpenGL
Severity: 3 - Normal
Priority: 5 - Normal
Item Group: Unexpected Error
Status: None
Assigned to: None
Originator Name: Philip Nienhuis
Originator Email:
Open/Closed: Open
Discussion Lock: Any
Release: dev
Operating System: Microsoft Windows
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Details:
(Release is actually 5.1.1 but that is not in the bug tracker's drop-down
list)
Steps to reproduce:
>> poly = [95000 482000; 98000 485000; NaN NaN; 95000 485000; 98000 482000];
>> plot (poly(:, 1), poly(:, 2))
>> box on; grid on; axis equal; axis tight
A cross ('X') is shown.
Then, select the "Zoom out" button, and click in middle of plot
==> plot is zoomed out, fine.
Next, click "Autoscale" button
==> cross disappears completely and cannot be redrawn. Nothing seems to help.
This is the bug.
Just a hunch: is this another manifestation of single precision in OpenGL?
Because if after zooming out, again zooming in a little by selecting a zoom
area, Autoscale seems to work in Qt and the plot is again filled with the
cross.
Using fltk it is a bit easier to recover the plot, just "axis tight" does the
job.
_______________________________________________________
Reply to this item at:
<https://savannah.gnu.org/bugs/?55931>
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- [Octave-bug-tracker] [bug #55931] Plot diisappers after zooming out once and then clicking "Autoscale",
Philip Nienhuis <=