On Thu, Jul 25, 2013 at 9:16 AM, davidp <davide...@gmail.com> wrote:
> I am using Sage to plot an arrangement of planes in 3-space.  Each plane has
> its own color, and I would like a legend in the plot that associates the
> equation of each plane with its color.  This experiment seems to indicate
> that legends are not available for 3d graphics:
>
> ---------------------------------------------------------------------------
> sage: p = plot3d(x^2,(x,-1,1),(y,-1,1),legend_label='0')
> sage: q = plot3d(x^2+y^2,(x,-1,1),(y,-1,1),legend_label='1')
> sage: c = p+q
> sage: c.legend(true)
> ---------------------------------------------------------------------------
> AttributeError                            Traceback (most recent call last)
> <ipython-input-28-744abb0d6c3b> in <module>()
> ----> 1 c.legend(true)
>
> AttributeError: 'Graphics3dGroup' object has no attribute 'legend'
> ---------------------------------------------------------------------------
>
> As I rotate the 3d-object, I would like for the legend would stay in one
> place.
>
> Any suggestions?

This won't help you today, but an REU student -- Renford Alexander --
is working fulltime right now on Three.js-based 3d graphics rendering
for https://cloud.sagemath.com.  He showed me some demos yesterday of
drawing text in 3d, the looked pretty useful.  In particular, he draws
arbitrary text on a 2d html5 canvas, then puts the canvas element in
the 3d scenes as a "sprite".    This functionality should come to
https://cloud.sagemath.com within a month, hopefully.

 -- William

>
> Thanks.
>
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-- 
William Stein
Professor of Mathematics
University of Washington
http://wstein.org

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