Re: [Matplotlib-users] Diplaying 2D images in mplot3d

[Benjamin R. <ben...@ou...>]

I tried something like this awhile back to no avail. Because of the kludgy
nature of mplot3d, we are lucky we even can display 2d artists like
polygons (and, this is me speaking as the de facto maintainer of mplot3d!).
Images are an entirely different beast, unfortunately.

What *might* work is getting a pcolormesh object converted into 3d. Not
pcolor (as that is an image-based object), but the QuadMesh object that
gets returned by pcolormesh(). I haven't tried to convert that into a 3d
equivalent, but it might be feasible.

I would also check out glumpy: https://code.google.com/p/glumpy/. I could
have sworn I have seen examples of glumpy treating images as "texture" data
for surfaces.

I hope this points you in a useful direction!
Ben Root


On Tue, Sep 30, 2014 at 5:54 PM, Fabrice C. <kap...@ya...>
wrote:

> Dear list,
>
> I would like to display a 2D image in a mplot3d axe in order to combine
> it with a surface3D or a bar3d plot for instance. The effect I am
> looking for is similar to what can be seen in the bottom XY plane of
> http://matplotlib.org/1.4.0/examples/mplot3d/contourf3d_demo2.html,
> except that I would like to have a custom image instead of the filled
> contours.
>
> I googled the subject and found only messages dating at best from 2010.
> These messages mentioned that the imshow() method did not work on a
> mplot3d. Indeed it does not.
> The only alternatives offered by the googled answer to my problem were
> to switch to VTK or Mayavi. For one thing, I never managed to install
> VTK on my PC, and I already have other matplotlib figures in my wxpython
> application so I would really like to stick to matplotlib.
>
> Does anyone have pointers as to how I could display a 2D image in
> mplot3d? Do I need to create a new artist in order to replace the
> non-functionning imshow?
> I see that patch collections work fine in mplot3D. Would it be feasible
> to load an image and have it displayed as a patch collection (1 patch
> for each pixel)?
>
> Any advice would be highly appreciated,
>
> Fabrice
>
>
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