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[Octave-bug-tracker] [bug #58956] Empty plot for certain xlim / ylim set
From: |
Hg200 |
Subject: |
[Octave-bug-tracker] [bug #58956] Empty plot for certain xlim / ylim settings |
Date: |
Sun, 1 Nov 2020 19:06:45 -0500 (EST) |
User-agent: |
Mozilla/5.0 (X11; Fedora; Linux x86_64; rv:81.0) Gecko/20100101 Firefox/81.0 |
Follow-up Comment #28, bug #58956 (project octave):
<< With the OpenGL coordinate system centered at the target, do you think that
it would be possible to do the rescaling for bug #32980 with these
transformation matrices (in a follow up patch)?
I think it is not possible to fix bug #32980 comment 25 by merely changing the
view transformation and the projection matrix. If I take the example from
comment 25, convert the time to simple precision and try to "normalize" the
view by translating the abscissa by a constant, the same artifacts are
produced:
++
t = now-1:(1/1440):now;
x = -cos(2*pi*t) + rand(size(t))/10;
t = single(t) - single(fix(now));
plot(t,x)
--
Most likely the data is already unrecoverable when we leave
opengl_renderer::draw_line() because eventually glVertex3d() is called.
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