Re: octaviz without render window

[Jonathan Stickel]

You can try something like

> f = vtk_figure(0);
> f.renderer.GetActiveCamera().SetPosition(0.8,0.5,1);

This is an example of accessing and changing vtk object properties. 
Although not user friendly, complete vtk object documentation can be 
found here:

http://www.vtk.org/doc/release/5.0/html/index.html

Jonathan


Lieven Theys wrote:
> Jonathan,
>
> That worked a treat.  I can generate graphs through the web interface 
> with a script similar to what you suggested.
> Thank you very much.
>
> My next hurdle is to make changes the view of the graph, not through 
> mouse or key input on the (virtual) X window but through predefined 
> octave commands.  I hope I will find out how to do that, if not, I may 
> have to use this fine mailing list again.
>
> Regards,
>
> Lieven
>
>
> Op 27-jul-07, om 16:03 heeft Jonathan Stickel het volgende geschreven:
>
> > Lieven
> >
> > I don't think image output is possible without a render window.  There 
> > is also an issue with the render window needing to be on top; if it is 
> > behind another window, the image output will show the overlapping 
> > window.  However, there is a workaround by using Xvfb (X virtual frame 
> > buffer).  You can do something like:
> >
> > $ Xvfb :1 -screen 0 800x600x16 &
> > $ export DISPLAY=":1.0"
> > $ octave
> > (plotting commands; all X output will be directed to the virtual screen)
> > $ exit
> > $ killall Xvfb
> >
> > HTH,
> > Jonathan
> >
> >
> > Date: Fri, 27 Jul 2007 10:46:47 +0200
> > From: Lieven Theys <address@hidden>
> > Subject: octaviz without render window
> > To: address@hidden
> > Message-ID: <address@hidden>
> > Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed
> >
> > Dear all,
> >
> > I am a long time user of (basic) functions of octave.
> > I am running GNU Octave, version 2.1.73 (powerpc-unknown-linux-gnu).
> >
> > Now I have run into a small problem.
> >
> > I have been using gnuplot and its low and high level plot commands in
> > octave to generate png and eps files through a web interface.
> >
> > Up to here no problem. but ...
> >
> > I am looking at switching to octaviz for my 3d plotting needs but I
> > am not able to figure out how I can generate a file (png and/or eps)
> > without having a render window showing up.
> >
> > Can anybody point me in the right direction?
> >
> > Kind regards,
> >
> > Lieven