Re: octaviz without render window

[Lieven Theys]

Jonathan, and the rest of the list,

As you suggest I am able to change camera position and upview etc.
Thank you very much for the link you provided for the wealth of
information.

There is however one thing I am not able to get to work.
In the same script I want to generate several plots and need to clear
the renderer inbetween.  I tried:
vtk_clear
or
f.rendrer.Clear()

neither of these calls clears the actors that have previously been
added.
To check I called:
f.renderer.GetActors() but the number of actors stays the same before
and after the clear call.

Do you know what I could be overlooking or am I interpreting the meaning
of clear incorrectly.

Kind regards,

Lieven


Op Fri, Jul 27, 2007 at 02:26:12PM -0600, schreef 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
> >>
> >
> >
> >
>