pythreejs demo in cocalc

Code cells below are from the start of the notebook here:

https://github.com/jovyan/pythreejs/blob/master/examples/Examples.ipynb

Do these setup steps in a .term before running this notebook:

pip3 install --user pythreejs
jupyter nbextension install --user --py pythreejs
jupyter nbextension enable --user --py pythreejs
# it may be necessary to restart the jupyter server
smc-jupyter restart

This notebook must be run using "Plain Jupyter Server", which can be launched from lower right of the Project Settings tab (wrench icon) in CoCalc.

In [1]:

from pythreejs import *
import numpy as np
from IPython.display import display
from ipywidgets import HTML, Text, Output, VBox
from traitlets import link, dlink

In [2]:

ball = Mesh(geometry=SphereGeometry(radius=1), 
            material=MeshLambertMaterial(color='red'),
            position=[2, 1, 0])

c = PerspectiveCamera(position=[0, 5, 5], up=[0, 1, 0],
                      children=[DirectionalLight(color='white', position=[3, 5, 1], intensity=0.5)])

scene = Scene(children=[ball, c, AmbientLight(color='#777777')])

renderer = Renderer(camera=c, 
                    scene=scene, 
                    controls=[OrbitControls(controlling=c)])
display(renderer)

In [3]:

ball.geometry.radius = 0.5

In [5]:

import time, math
ball.material.color = '#4400dd'
for i in range(1, 150, 2):
    ball.geometry.radius = i / 100.
    ball.position = [math.cos(i / 10.), math.sin(i / 50.), i / 100.]
    time.sleep(.05)

In [ ]: