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

[Adam H. <hug...@gm...>]

Instead of learning VTK, you may find it easier to start with Mayavi 2
(written on VTK).



On Wed, Oct 1, 2014 at 2:27 PM, Fabrice C. <kap...@ya...>
wrote:

> Dear Ben,
>
> Thank you for the explanation. Too bad mplot3d cannot display textured
> polygons.
> I did have a look at glumpy and it does part of what I am looking for.
> However, glumpy does not support being embedded in a wxpython application
> which is a requisite for me.
>
> I guess I just have to learn VTK...
>
> Thanks again,
>
> Fabrice
>
>
> Benjamin Root <ben...@ou...> wrote:
>
> 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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