From octave-graphics-request at bevo dot che dot wisc dot edu Fri Jan 24 04:31:44 2003
Subject: Re: 2D and 3D visualization tool for Octave.
From: =?iso-8859-1?q?Ole=20Jacob=20Hagen?= <olehag_2001 at yahoo dot no>
To: ljacques at fyma dot ucl dot ac dot be
Cc: octave-graphics at bevo dot che dot wisc dot edu
Date: Fri, 24 Jan 2003 11:31:38 +0100 (CET)

Hi, Octavers.

The graphics handler will be written in C++. And it's
name will be Oplot++. Whether we shall use VTK or
Coin3d is a remaining question, since they both has
their strength and weaknesses. But they both are very
promising candidates for the implementation. 

If you look at: http://visu.sf.net,
http://mayavi.sf.net and http://kfem.sf.net you would
get a picture how things are going to be when Oplot++
is finished. This is the main idea.  

Mayavi is written in Python, while kfem and visu are
both written in c++, using KDE and GTK, respectively. 

I like mayavi's way of having opportunity to process
the plot, image, and kfem has a zoom and rotation
support by clicking on the "image". 

So the features you requested will be implemented, but
not necessary all at once. 

I've done some research and tested VTK, and it runs
smoothly with my graphics card; ATI RAGE 128, with 16
MB memory. That's nice. 

Cheers, 

Ole J. 
 --- Laurent Jacques <ljacques at fyma dot ucl dot ac dot be> skrev:
> On Tuesday 21 January 2003 09:19, Ole Jacob Hagen
> wrote:
> |  Hi, Octavers.
> |
> |  I'm a Zherlock-developer and we will implement a
> |  2D/3D
> |  plotting utility for handle graphics in Octave.
> |  Our motivation is to have the same features as
> |  Matlab
> |  does, but even better. Link to Zherlock;
> |  http://www.zherlock.org!
> |
> |  We're planning to use one of these visualization
> |  toolkits; VTK, coin3d or OpenInventor which are
> all
> |  Opensource. VTK can be found at
> |  http://www.kitware.com, and coin3d can be found
> at
> |  http://www.coin3d.org, while OpenInventor can be
> |  found
> |  at Silicon Graphics' website.
> |  The decision about this is made during next week.
> |
> |  To ensure everybody that this is actually
> happing, I
> |  say that we are a group of 9 developers in
> |  Zherlock-project.
> |
> |  So, is there any questions and wishes for our
> |  implementation?
> 
> That's a cool initiative. 
> 
> My personnal wishes is the ability of this tool to
> - modify colormapping
> - handle graphical objects with both command line
> and mouse pointer;
> - add easily texts, boxes, arrows, ... to the
> figures
> - understand multiplotting in the same figure
> - rotate 3D representation and zoom with mouse
> - return coordinates of a mouse click in figure
> - export figure in eps, png, jpg, script to
> reproduce figure, svg, ...
> - more difficult: transparency (alpha channel) to
> surface,  lighting,  
> 
> This is for sure a long list and all items are
> probably hard to program.
> However, whatever is the toolkits you will choose,
> the important thing is the 
> high responsivity of the gui. 
> 
> For instance, the Matlab gui (written in java. jvm
> ?) is really a pity under 
> linux. It takes a long time to activate/delete
> objects or open menu (even on 
> quick computer). It adds also a lot of bugs and
> segfault to Matlab. 
> 
> Good work ;-) and thanks for your project,
> Laurent.
> 
> 
> 
> 
> 
> 
> 
>  

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