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Sage not displaying/rendering 3D plots (Partially solved) – Debian

partially solved : Works in jmol trough Sage CLI

3D plot remains blank in SageMath in Jupyter Notebook

Edit: This problem still remains unsolved, I have tried to even boot into a different OS (Debian instead of Kali) (not using anaconda, will (hopefully) get more time to try that)

As the title describes and illustrated by this screenshot:

Command for 3D plot produces white instead of interactive 3D plot

Instead of the expected 3D plot, just a white plain background with a question mark in it, that, when clicked, displays a menu like this:

Menu obtained when clicking the empty plot

I have now experimented quite a bit on this example (on my system) and… to give an example:

This shows just a black square (while it’s supposed to show a sphere):

sage: u = var('u')
sage: circle = (cos(u), sin(u))
sage: rp = revolution_plot3d
sage: rp(circle, (u, 0, 2*pi), axis=(0, 0),
....:    show_curve=True, opacity=0.5).show(aspect_ratio=(1, 1, 1))

The following code is (I guess) a bit better, but still not really "as it should be", or "as expected":

sage: u = var('u')
sage: circle = (cos(u), sin(u))
sage: rp = revolution_plot3d
sage: rp(circle, (u, 0, 2*pi), axis=(0, 0), frame=False,
....:    show_curve=True, opacity=0.5).show(aspect_ratio=(1, 1, 1))

(Change: include frame=False somewhere in the last line).

Inspiration

I am trying to recreate this 3D plot from the SageMath documentation:

Sphere 3D plot from SageMath documentation

Info/Logs:

  • SageMath version:

    SageMath version 9.2, Release Date: 2020-10-24

  • OS: Kali Linux

  • SageMath installed via apt:

    sudo apt-get install sagemath

I do not need to "get" this solved anytime soon, Right now I am mostly doing matrix operations, and such. so – there is no "hurry" with coming up with a solution here! It would just be a [plus+] to be able to do as the problem describe, but it is not necessary.

Any help is greatly appreciated!
Thanks!

Tags:

4

Answers


  1. Chosen as BEST ANSWER
    0

    MAJOR UPDATE:

    To not introduce false hope to the future readers: I have NOT solved it in Jupyter notebook.

    But

    I have (probably) fixed it with a viewer, my system had Jmol pre installed; (probably because I liked it before, and did some exercises with it, as in Matlab)

    The (partial) solution:

    But here is the thing, when I access a SAGE terminal (bash -> sage) and for example, plotting something that normally would just result in either white - or a black screen in Jupyter whatever I tried to do to make it work;

    It opens up a jmol window (the, actual application - Jmol)

    and plots it.

    I did not know it was this easy to get Jmol and sage math to work together (a actual fact; I did not even know this was possible.

    Screenshots

    here are a few screenshots (Jupyter - black screen, and the exact same code - but run from Sage Terminal

    In Jupyter

    Same code, but in Sage terminal:

    (Identical results) (Which, was for me impossible, even at times where I could (In Jupyter) (ugly)-plot it, it didn't show the expected results, (colors were a bit distorted, and the form had very little in common with the actual plot Sage Docs was showing)

    Jmol Window Same code - From Sage Terminal

    To be honest, I think - I like this more, even if Jupyter would've got to work (maybe some time in the future) This - jmol application has some really neat properties, (color, axis's, and animations (rotation) and other stuff) I did really not know this at all; In Jupyter one maybe could rotate it with the mouse and zoom in, but not really change color, easily - (Not saying this is more expected result, but In my opinion - in my scenario - This was one, (*)good workaround, If not a actual solution, (In my case I will continue this way, it's flawless)

    Hopefully this is helpful for someone in the future!


  3. 0

    Like the OP (original poster), I had the same error with show3d() in a Jupyter notebook under SageMath 9.6. I was not using JMOL. In SageMath 9.7, compiled from source under Ubunto 20.10 in WSL2 on a Windows 10 system, an attempt to use show3d() in a Jupyter notebook, for example

        # Franklin Graph
    Frank = graphs.FranklinGraph()
    Frank.show3d()

    resulted in the following error.

        $HOME/sage/sage-9.7/src/sage/repl/rich_output/display_manager.py:610: 
    RichReprWarning: Exception in _rich_repr_ while displaying object:
    [Errno 2] No such file or directory:
    '$HOME/sage/local/lib/sage/ext_data/threejs/threejs-version.txt'
    warnings.warn(

    (reformatted for typographical clarity.)

    My workaround was to copy the source from $HOME/sage/sage-9.7/src/sage/ext_data/threejs to $HOME/sage/local/lib/sage/ext_data/threejs.

    This is not entirely satisfactory as the directory naming suggests that the installation of threejs did not proceed as intended. I may take this up with the SageMath development list.

    enter image description here

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  4. 0

    Adding another answer because this is both quite awhile ago but also, a quite different solution

    by adding Frame=False, works flawlessly and to be sure this really, works I have tested this on numerous previous problems I had previously and it seems to work, I do not know for sure what this is about but, at least it works

    
u = var('u')
circle = (cos(u), sin(u))
revolution_plot3d(circle, (u,0,2*pi), axis=(0,0), 
                  show_curve=True, opacity=0.5).show(aspect_ratio=(1,1,1),
                                                     frame=False)

    plot 1

    I also experimented a bit with opacity=1

    plot 2

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