The python code pydy.viz.shapes.py provides support for Box shapes but the type was not supported by the javascript code. This pull request add support for this, including the possibility to edit the parameters in the GUI when selecting Edit Objects.

I can try to add documentation and unittests but I will wait for your opinion.

Below is a sample code to test the feature (it might need a "Shift-F5" to reload the javascript from the browser's cache):

import sympy as sp
from sympy.physics.mechanics import Point, ReferenceFrame
from pydy.viz.scene import Scene
from pydy.viz.shapes import Box
from pydy.viz.visualization_frame import VisualizationFrame

frame = ReferenceFrame('e')
point = Point('A')

box = Box(width=4, height=2, depth=0.5, color='blue', name='testbox')
vizf = VisualizationFrame('vizbox',frame, point, box)
scene = Scene(frame, point, vizf)
scene.constants = {}
scene.states_symbols = [sp.Symbol('x')]
scene.states_trajectories = np.zeros((2,1))
scene.times = np.array([0.,1.0])
scene.display()

New Feature

• There are no merge conflicts.
• If there is a related issue, a reference to that issue is in the
  commit message.
• Unit tests have been added for the new feature.
• The PR passes tests both locally (run nosetests) and on Travis CI.
• All public methods and classes have docstrings. (We use the numpydoc
  format.)
• An explanation has been added to the online documentation. (docs
  directory)
• The code follows PEP8 guidelines. (use a linter, e.g.
  pylint, to check your code)
• The new feature is documented in the Release
  Notes.
• The code is backwards compatible. (All public methods/classes must
  follow deprecation cycles.)
• All reviewer comments have been addressed.