> Here's some code, which as yet doesn't actually make use of VPython -- but
> that's where it's going.
>
And here's where it (the code) went.
Very minimal, at this point but enough to get VPython actually doing
something with the triangle.
A student could start with this code and start adding stuff e.g. make it
more colorful, add defaults (e.g. radius), cycle through random triangles in
main() -- using a try loop to catch illegals -- and so on.
Kirby
===
class Vpyview(object):
"""
A viewer: view using VPython
"""
def __init__(self):
self._garbage = []
def display(self, shape):
self._garbagecollect()
self._showverts(shape.verts)
self._showedges(shape.edges, shape.verts)
time.sleep(.1)
def _garbagecollect(self):
for g in self._garbage:
g.visible = 0
def _showedges(self, edges, verts):
for e in edges:
v0 = vector(verts[e[0]])
v1 = vector(verts[e[1]])
edge = cylinder(pos=v0, axis=v1-v0, radius = 0.1)
self._garbage.append(edge)
def _showverts(self, verts):
for v in verts:
v0 = vector(verts[v])
sph = sphere(pos=v0, radius=0.1)
self._garbage.append(sph)
from visual import *
import time
def main():
"""
Main call sequence
"""
thescene = display(title='MVC Demo', center=(0,0,0),
background=(.5, .5, .5))
thescene.autoscale = 0
theviewer = Vpyview()
theshape = TriAdapter(3,3,3)
pulser = Pulser(theshape, theviewer)
pulser.run()
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