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[Octave-bug-tracker] [bug #55500] print modifies view of plot
From: |
Rik |
Subject: |
[Octave-bug-tracker] [bug #55500] print modifies view of plot |
Date: |
Thu, 17 Jan 2019 12:44:56 -0500 (EST) |
User-agent: |
Mozilla/5.0 (Windows NT 10.0; WOW64; Trident/7.0; rv:11.0) like Gecko |
URL:
<https://savannah.gnu.org/bugs/?55500>
Summary: print modifies view of plot
Project: GNU Octave
Submitted by: rik5
Submitted on: Thu 17 Jan 2019 09:44:55 AM PST
Category: Plotting with OpenGL
Severity: 3 - Normal
Priority: 5 - Normal
Item Group: Inaccurate Result
Status: None
Assigned to: None
Originator Name:
Originator Email:
Open/Closed: Open
Discussion Lock: Any
Release: dev
Operating System: Any
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Details:
This was discovered in bug #55481 where differences between the plotting
engines of Octave and Matlab were compared. In the cases below, the onscreen
result is correct, but when printed to a graphic png file the results are
different.
Other noticeable differences are in
- demo camlookat 1: different zoom levels (I can't reproduce on screen)
- demo camorbit 1: different view angle
- demo camtarget 1: different plotboxaspectratio
- demo camva 1: completely different zoom level between fltk and qt (I can't
reproduce on screen)
- demo camzoom 1: completely different zoom level between fltk and qt (I
cant't reproduce on screen)
This may be related to updating the OpenGl transforms ahead of printing. One
thing I notice is that if I use the mouse to rotate the plot the original view
is also lost. Similarly, if I use the mouse to sligthly enlarge the plot
window then the plot snaps to a new view.
Simple example to reproduce
demo camva 1
## Use mouse to rotate plot
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- [Octave-bug-tracker] [bug #55500] print modifies view of plot,
Rik <=