Arch Linux

olivierguillon

Member

Registered: 2019-03-11

Posts: 6

[Solved] black canvas output when using threejs viewer in sagemath

Hello,
I'm experiencing a display bug when trying to plot 3d objects with sagemath (version 9.2-10).
For example, in the jupyter notebook, when typing the following commands:

var('x y z')

and then

implicit_plot3d((x^2+y^2+z^2+3)^2-16*(x^2+y^2), (x, -5, 5), (y, -5, 5), (z, -5, 5), viewer="threejs")

all I get is a black rectangle, with no error shown. The same error occurs from the console.
When trying to see what's going on in the browser, I get the following error message:

Uncaught TypeError: THREE.Geometry is not a constructor
    <anonymous> about:srcdoc:83

The jmol and tachyon viewers are not affected, just the threejs one.
It seems threejs-sage is not working on my system but I don't know for sure.

I'm using ArchLinux on a Dell XPS 9560 laptop.

Last edited by olivierguillon (2021-02-20 01:20:58)

Lone_Wolf

Member

From: Netherlands, Europe

Registered: 2005-10-04

Posts: 11,911

Re: [Solved] black canvas output when using threejs viewer in sagemath

Looks like upstream changes in threejs r125 cause that.

https://github.com/mrdoob/three.js/wiki … r124--r125
https://sbcode.net/threejs/geometry-to-buffergeometry/

---

Disliking systemd intensely, but not satisfied with alternatives so focusing on taming systemd.

(A works at time B)  && (time C > time B ) ≠  (A works at time C)

arojas

Developer

From: Spain

Registered: 2011-10-09

Posts: 2,097

Re: [Solved] black canvas output when using threejs viewer in sagemath

Please report to bugs.archlinux.org

olivierguillon

Member

Registered: 2019-03-11

Posts: 6

Re: [Solved] black canvas output when using threejs viewer in sagemath

Problem solved with the latest version of threejs-sage (1:r124-1) in the community repo.

Thanks a lot for the quick response !