[with patch; positive review] Implement mesh lines in 3d plots

[jason]

Is there an easy way to get mesh lines in a plot3d surface?

This is not implemented. I wish you would implement it :-)

Robert Bradshaw might have some useful advise.

> > Sometimes
> >  it is hard to visualize the plot (especially when it is printed) without
> >  the mesh lines.
> >
> >  If that is easy, what about the possibility of doing some of things that
> >  Mma does with different types of meshes?  For reference, see:
> >
> >  http://reference.wolfram.com/mathematica/ref/Mesh.html
> >
> >  http://reference.wolfram.com/mathematica/ref/MeshFunctions.html
> >
> >  http://reference.wolfram.com/mathematica/ref/MeshShading.html
> >
> >  http://reference.wolfram.com/mathematica/ref/MeshStyle.html
> >

[jason]

Well, he already answered my question in the source.

In sage/sage/plot/plot3d/index_set.pyx, starting at line 658 (in 2.10.4):

        # If we wanted to turn on display of the mesh lines or dots
        # we would uncomment thse.  This should be determined by
        # render_params, probably. 
        #s += '\npmesh %s mesh\n'%name
        #s += '\npmesh %s dots\n'%name

Uncommenting the appropriate line does indeed give a mesh in JMOL. So now the question is how to expose this to the user. And how to extend it to do nontrivial mesh functions.

[TimothyClemans]

fixes doctest failures

[TimothyClemans]

Impressive plots with mesh lines! There were two doctest failures I fixed them and uploaded a patch.

[mabshoff]

Timothy's patch looks good to me. Somebody didn't doctest his own patch ;)

Cheers,

Michael

[mabshoff]

Merger in Sage 3.0.1.alpha1