#12212: Colormap for implicit_plot3d and parametric_plot3d
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Reporter: niles | Owner: jason, was
Type: defect | Status: needs_work
Priority: major | Milestone: sage-6.4
Component: graphics | Resolution:
Keywords: colormap, plot | Merged in:
Authors: Joris | Reviewers: Frédéric Chapoton,
Vankerschaver, Frédéric Chapoton | Niles Johnson
Report Upstream: N/A | Work issues:
Branch: u/chapoton/12212 | Commit:
Dependencies: | 0ae10f534826c0addaf4d957bf7c0586ba0a88c4
| Stopgaps:
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Comment (by kcrisman):
I think I agree now that there is no real reason for the global texture
thing, there should be a way to just use that color if it's available.
> Yeah, mainly the `colordata` tuple, but I think it's a symptom of some
deeper organization issues.
I think I dug up another one of your qualms next.
> If I understand correctly, this is a fundamental limitation of this
approach, because it applies colors only *after* the surface is
constructed and therefore only has access to coordinates in 3-space, not
the parametrization that was used to produce them.
But I don't know that these are insurmountable. I mean, how else
''could'' one give not just a cmap/color, but also a way to actually
allocate it? I guess one could require using it post-hoc like in
texture_map.py but I don't think that is necessary.
Also, I have now actually read through a lot more of the code as a whole.
I see three things.
* Awesome added (needed) documentation and cleanup everywhere, very nice
* Joris' original texture map file, which seems to be used nowhere else
and allows one to apply such a transform ''after'' creating a graphics
object
* chapoton's impressive direct additions of this functionality to things
''while'' creating the object
--
Ticket URL: <http://trac.sagemath.org/ticket/12212#comment:67>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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