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graphics issues (was: Re: moving toward a 3.0 release)

From: John W. Eaton
Subject: graphics issues (was: Re: moving toward a 3.0 release)
Date: Fri, 29 Sep 2006 12:44:20 -0400

On 29-Sep-2006, Sebastien Loisel wrote:

| Bill, the project I was working on, Workshop, essentially has the capability
| you speak of (drawing lines, triangles and text.) It is also very fast.
| Printing is not yet supported, but I got Christophe Geuzaine to put in the
| one patch I needed to GL2PS, so creating PostScript graphs by hitting a
| print button on the plot would have been extremely easy. 3d plots were also
| not too far off, although I wasn't sure what the interface with Octave was
| going to look like.

If all we expect the back end to do is draw lines and text, then
it seems to me that we have to do a lot of work in Octave to recreate
the things that tools like gnuplot can already do (drawing axes,
automatic placement of tic marcs, drawing different line styles,
hidden line removal, etc.).  That seems like a waste to me.  So is
there a general purpose graphics library that can help with this?
Does it really make sense for us to reinvent the software for 3D 
plotting with hidden line removal?  What does the implementation of
the mesh function in Octave look like with the new graphics?


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