#12212: Colormap for implicit_plot3d and parametric_plot3d
-------------------------------------+-------------------------------------
Reporter: niles | Owner: jason, was
Type: defect | Status: needs_work
Priority: major | Milestone: sage-6.5
Component: graphics | Resolution:
Keywords: colormap, plot | Merged in:
Authors: Joris | Reviewers: Frédéric Chapoton,
Vankerschaver, Frédéric Chapoton | Niles Johnson, Karl-Dieter Crisman,
Report Upstream: N/A | Jonathan Gutow
Branch: u/chapoton/12212 | Work issues: update documentation
Dependencies: | and examples
| Commit:
| 669d270b343da222aa68fcf40147c7cb6d0ad5c8
| Stopgaps:
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Comment (by kcrisman):
Sorry, the warning needs to be in `parametric_surface.pyx` too, and
changed since jmol is sort of working.
In that file, you say
> Note that the coloring function should have values between 0 and 1. This
value is passed to the chosen colormap.
Is that maybe the problem we are having? What happens with values outside
that - is it done 'modulo 1' or something else?
In implicit_plot I would put the examples of this in the example section,
maybe after the `smooth=True` example.
In parametric plot 3d the examples need to be dealt with anyway, and the
indentation is not right when you view it.
{{{
EXAMPLES: We demonstrate each of the four ways to call this
function.
#. A space curve defined by three functions of 1 variable:
::
sage: parametric_plot3d( (sin, cos, lambda u: u/10), (0, 20))
Graphics3d Object
Note above the lambda function, which creates a callable Python
function that sends `u` to `u/10`.
#. Next we draw the same plot as above, but using symbolic
functions:
::
sage: u = var('u')
sage: parametric_plot3d( (sin(u), cos(u), u/10), (u, 0, 20))
Graphics3d Object
#. We draw a parametric surface using 3 Python functions (defined
using lambda):
::
sage: f = (lambda u,v: cos(u), lambda u,v: sin(u)+cos(v),
lambda u,v: sin(v))
sage: parametric_plot3d(f, (0, 2*pi), (-pi, pi))
Graphics3d Object
}}}
up to here is fine, but
{{{
#. The surface, but with a mesh:
::
sage: u, v = var('u,v')
sage: parametric_plot3d((cos(u), sin(u) + cos(v), sin(v)), (u,
0, 2*pi), (v, -pi, pi), mesh=True)
Graphics3d Object
}}}
should just be an example later. This one is the true "fourth way to call
the function".
{{{
#. The same surface, but where the defining functions are
symbolic:
::
sage: u, v = var('u,v')
sage: parametric_plot3d((cos(u), sin(u) + cos(v), sin(v)), (u,
0, 2*pi), (v, -pi, pi))
Graphics3d Object
}}}
Everything after that is indented too far, up until
{{{
We call the space curve function but with polynomials instead of
symbolic variables.
}}}
including all the added examples.
--
Ticket URL: <http://trac.sagemath.org/ticket/12212#comment:143>
Sage <http://www.sagemath.org>
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