pythreejs

Links: notebook, html, python, slides, GitHub

pythreejs allows 3D interactive graphs in a notebook.

documentation source installation tutorial gallery

from jyquickhelper import add_notebook_menu
add_notebook_menu()

Installation

pythreejs requires local installation.

::

pip install pythreejs jupyter nbextension enable –py pythreejs

example

from pythreejs import *
import numpy as np
from IPython.display import display
from ipywidgets import HTML, Text
from traitlets import link, dlink
ball = Mesh(geometry=SphereGeometry(radius=1), material=MeshLambertMaterial(color='red'), position=[2,1,0])
scene = Scene(children=[ball, AmbientLight(color='#777777'), make_text('Hello World!', height=.6)])
c = PerspectiveCamera(position=[0, 5, 5],
                      up=[0, 0, 1],
                      children=[DirectionalLight(color='white', position=[3, 5, 1], intensity=0.5)])
renderer = Renderer(camera=c, scene=scene, controls=[OrbitControls(controlling=c)])
display(renderer)

Failed to display Jupyter Widget of type Renderer.

If you're reading this message in the Jupyter Notebook or JupyterLab Notebook, it may mean that the widgets JavaScript is still loading. If this message persists, it likely means that the widgets JavaScript library is either not installed or not enabled. See the Jupyter Widgets Documentation for setup instructions.

If you're reading this message in another frontend (for example, a static rendering on GitHub or NBViewer), it may mean that your frontend doesn't currently support widgets.

nx, ny = (20, 20)
xmax=1
x = np.linspace(-xmax, xmax, nx)
y = np.linspace(-xmax, xmax, ny)
xx, yy = np.meshgrid(x, y)
z = xx ** 2 - yy ** 2
#z[6,1] = float('nan')
surf_g = SurfaceGeometry(z=list(z[::-1].flat),
                         width=2 * xmax,
                         height=2 * xmax,
                         width_segments=nx - 1,
                         height_segments=ny - 1)


surf = Mesh(geometry=surf_g, material=MeshLambertMaterial(map=height_texture(z[::-1], 'YlGnBu_r')))

surfgrid = SurfaceGrid(geometry=surf_g, material=LineBasicMaterial(color='black'))
hover_point = Mesh(geometry=SphereGeometry(radius=0.05), material=MeshLambertMaterial(color='hotpink'))
scene = Scene(children=[surf, surfgrid, hover_point, AmbientLight(color='#777777')])
c = PerspectiveCamera(position=[0, 3, 3], up=[0, 0, 1],
                      children=[DirectionalLight(color='white', position=[3, 5, 1], intensity=0.6)])

pickable_objects = Group()
pickable_objects.add(surf)

click_picker = Picker(controlling = pickable_objects, event='dblclick')
hover_picker = Picker(controlling = pickable_objects, event='mousemove')
renderer = Renderer(camera=c, scene = scene, controls=[OrbitControls(controlling=c), click_picker, hover_picker])

def f(change):
    value = change['new']
    print('Clicked on %s' % value)
    point = Mesh(geometry=SphereGeometry(radius=0.05),
                 material=LambertMaterial(color='red'),
                 position=value)
    scene.children = list(scene.children) + [point]

click_picker.observe(f, names=['point'])

link((hover_point, 'position'), (hover_picker, 'point'))

h = HTML()
def g(change):
    h.value = 'Green point at (%.3f, %.3f, %.3f)' % tuple(change['new'])
g({'new': hover_point.position})
hover_picker.observe(g, names=['point'])
display(h)
display(renderer)

Failed to display Jupyter Widget of type HTML.

If you're reading this message in the Jupyter Notebook or JupyterLab Notebook, it may mean that the widgets JavaScript is still loading. If this message persists, it likely means that the widgets JavaScript library is either not installed or not enabled. See the Jupyter Widgets Documentation for setup instructions.

If you're reading this message in another frontend (for example, a static rendering on GitHub or NBViewer), it may mean that your frontend doesn't currently support widgets.

Failed to display Jupyter Widget of type Renderer.

If you're reading this message in the Jupyter Notebook or JupyterLab Notebook, it may mean that the widgets JavaScript is still loading. If this message persists, it likely means that the widgets JavaScript library is either not installed or not enabled. See the Jupyter Widgets Documentation for setup instructions.

If you're reading this message in another frontend (for example, a static rendering on GitHub or NBViewer), it may mean that your frontend doesn't currently support widgets.