>
> Hi William,
>  I'm in the process of doing a bunch of updating of the
> Tachyon header files and documentation and thought I'd send a
> quick ping.  I was wondering if the SAGE project wants or needs
> anything changed or improved in the Tachyon APIs, since I'm already
> doing some significant improvements for other projects.
>
> I was also curious what portions of the Tachyon APIs are
> exposed in SAGE now, and whether it might be time to

See
http://www.sagemath.org/doc/reference/sage/plot/plot3d/tachyon.html

> update SAGE to be able to take advantage of various new
> Tachyon features such as ambient occlusion lighting and
> other improvements that may not be exposed in the
> current versions SAGE.


This would be great. One reason when the Sage documentation is
vague (see for example texfunc
http://www.sagemath.org/doc/reference/sage/plot/plot3d/tachyon.html#sage.plot.plot3d.tachyon.Tachyon.texfunc)
is that the tachyon documentation is incomplete.
More examples would be very useful.

It would be cool to be able to map and image (eg, a file
image of a Sage logo) onto an object (eg, a sphere)
and put that over a mirrored plane. I remember trying to do that
some time ago and getting stuck. Is that implemented?

I would also like it to be easier to create animations
and other surfaces, such as hyperbolic paraboloids, in
tachyon. I know tachyon can be used as a viewer for
hyperbolic paraboloids, eg
sage: x,y,z = var("x,y,z")
sage: p = implicit_plot3d(x^2-y^2-z,(x,-2,2),(y,-2,2),(z,-2,2),
plot_points = 75)
sage: p.show(viewer="tachyon")
but can one add, for example shading and textures, to this
as a tachyon object?


>
> I would also be happy to have a look at your existing
> Tachyon code and see if I notice anything that might be added
> or improved if you can tell me where to look for it.


Online, it is here:
http://hg.sagemath.org/sage-main/file/f24ce048fa66/sage/plot/plot3d/tachyon.py#l1
In the Sage root directory, it is in devel/sage/sage/plot/plot3d/tachyon.py

Hopefully Tom Boothby and  Marshall Hampton will weigh in as well
with suggestions.

>
> Cheers,
>  John Stone
>
> --
> NIH Resource for Macromolecular Modeling and Bioinformatics
> Beckman Institute for Advanced Science and Technology
> University of Illinois, 405 N. Mathews Ave, Urbana, IL 61801
> Email: jo...@ks.uiuc.edu                 Phone: 217-244-3349
>  WWW: http://www.ks.uiuc.edu/~johns/      Fax: 217-244-6078
>
>
>
> --
> William Stein
> Professor of Mathematics
> University of Washington
> http://wstein.org
>
> --
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