Re: [guppi-list] Re: 3D plotting library

[Aaron Lehmann <aaronl vitelus com>]

Hi,

Thank you!

I already have it operating in a canvas. I am using GnomeCanvasWidget
rather than making my own item, and I don't know if this would be
sufficient.

OpenGL sounds really hard, and I'm not sure how usable it would be to
people without 3d accelerator cards... would the performance from software
rendering be acceptable? I really don't know how the performance of
going through Mesa would compare with rendering directly to a drawable 
as my demo does. Unless the performance of software Mesa is even
better, maybe it should offer this as an alternative, for people that do
not have OpenGL accelerators.

I have to run, but I thank you for your comments!
Aaron Lehmann

On Mon, 24 Jan 2000, Jon Trowbridge wrote:

> On Mon, Jan 24, 2000 at 08:56:01AM +0000, Aaron Lehmann wrote:
> > I have ported from KDE a plotting widget that draws beautiful (IMHO) 3d
> > graphs. I thought that this might be of interest to other people
> 
> I tried out your 3d demo --- very slick.  I definitely want Guppi to
> support 3d plots.  However, all of Guppi's plotting is canvas-based:
> so any 3d plotter would have to be ported to a canvas item.
> 
> IMHO, the right way to do this would be to use OpenGL.  I know about
> the OpenGL area widget for gtk, but is it possible to render OpenGL
> into a canvas item?  I know that you can always just drop a GtkGLArea
> widget onto the canvas, but I suspect you'd lose alpha transparency.
> Does anyone know about this sort of thing.  (I'm totally clueless when
> it comes to 3d and OpenGL.)
> 
> -JT
> 
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