vpython.ipynb

Kernel: VPython

umask 022; /projects/sage/sage-7.3/sage -pip install --no-deps --ignore-installed vpython vpnotebook ivisual ujson crayola

from __future__ import division
import vpython

vpython.sphere()

from ivisual import *
redbox=box(pos=vector(4,2,3),
           size=(8,4,6),color=color.red)
ball=sphere(pos=vector(4,7,3),radius=2,color=color.green)

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from __future__ import division, print_function
from ivisual import *

ERROR! Session/line number was not unique in database. History logging moved to new session 93

print( "hello")

hello

import ivisual
#print ivisual

from ivisual import *

scene = canvas('Ball in Box')
print("""
Right button drag to rotate "camera" to view scene.
  On a one-button mouse, right is Command + mouse.
Middle button to drag up or down to zoom in or out.
  On a two-button mouse, middle is left + right.
  On a one-button mouse, middle is Option + mouse.
""")

side = 4.0
thk = 0.3
s2 = 2*side - thk
s3 = 2*side + thk
wallR = box (pos=( side, 0, 0), size=(thk, s2, s3),  color = color.red)
wallL = box (pos=(-side, 0, 0), size=(thk, s2, s3),  color = color.red)
wallB = box (pos=(0, -side, 0), size=(s3, thk, s3),  color = color.blue)
wallT = box (pos=(0,  side, 0), size=(s3, thk, s3),  color = color.blue)
wallBK = box(pos=(0, 0, -side), size=(s2, s2, thk), color = (0.7,0.7,0.7))

#ball = sphere (color = color.green, radius = 0.4)
ball = sphere (color = color.green, radius = 0.4, make_trail=True, interval=5, retain=30)
#ball = cone (color = color.green, radius = 0.4, make_trail=True, interval=5, retain=30)
ball.mass = 1.0
ball.p = vector (-0.15, -0.23, +0.27)

side = side - thk*0.5 - ball.radius

display(scene)

dt = 0.5
t=0.0
while t < 2000:
  rate(100)
  t = t + dt
  ball.pos = ball.pos + (ball.p/ball.mass)*dt
  if not (side > ball.x > -side):
    ball.p.x = -ball.p.x
  if not (side > ball.y > -side):
    ball.p.y = -ball.p.y
  if not (side > ball.z > -side):
    ball.p.z = -ball.p.z

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Right button drag to rotate "camera" to view scene.
  On a one-button mouse, right is Command + mouse.
Middle button to drag up or down to zoom in or out.
  On a two-button mouse, middle is left + right.
  On a one-button mouse, middle is Option + mouse.