[Visualpython-users] Dethe Elza's icosahedron demo code

[Stephen H. <sh...@ua...>]

I was testing the ico.py program and found several things that caused a
bunch of syntax errors--
many '3D's' and extra = signs VPython didn't like.  Cleaning those out gave
a working program (below).

Did anybody else try this out?  Did it run without being doctored?

Steve Highland [Arrrgh... I don't know what I'm doin' ...]
________________

from visual import *

class ico:
    def __init__(self):
        f =frame()

        root5 = 5.0 ** 0.5
        phi = (1.0 + root5)/2.0
        tau = 1.0/phi
        points=[(1.0,phi,0.0),(-1.0,phi,0.0),(-1.0,-phi,0.0),(1.0,-phi,0.0),
(0.0,1.0,phi),(0.0,-1.0,phi),(0.0,-1.0,-phi),(0.0,1.0,-phi),
(phi,0.0,1.0),(phi,0.0,-1.0),(-phi,0.0,-1.0),(-phi,0.0,1.0)]

        self.vertices = []
        for point in points:
            self.vertices.append(sphere(frame=f, pos=point,
radius=0.4, color=color.blue))

        ico_edge_indices = [
            (0,1),(0,7),(0,9),(0,8),(0,4),
            (1,7),(7,9),(9,8),(8,4),(4,1),
            (7,10),(10,1),(1,11),(11,4),(4,5),
            (5,8),(8,3),(3,9),(9,6),(6,7),
            (10,11),(11,5),(5,3),(3,6),(6,10),
            (2,10),(2,11),(2,5),(2,3),(2,6)]
        self.edges = []
        for edge in ico_edge_indices:
            v1 = vector(points[edge[0]])
            v2 = vector(points[edge[1]])
            v3 = v2 - v1
            self.edges.append(cylinder(frame=f, pos=v1, axis=v3,
color=color.red,radius=0.1))

        face_list
=[0,9,7,6,10,2,11,5,4,8,0,9,0,1,7,10,0,4,1,11,10,6,2,3,5,8,11,2,10,6]
        solid = []
        for index in face_list:
            solid.append(points[index])
        self.faces = convex(frame=f, pos = solid, color=color.green)
        self.frame =  f

    def rotate(self, angle=None):
        self.frame.rotate(angle=angle, axis=(0.0,0.0,-1.0))

    def cycleColors(self, object=None):
        if object == None:
            for obj in self.vertices: self.cycleColors(obj)
            for obj in self.edges: self.cycleColors(obj)
            self.cycleColors(self.faces)
            return
        (red, green, blue) = object.color
        if red <= 0.0:
            if green <= 0.0:
                blue = blue - 0.01
                red = red + 0.01
            else:
                green = green - 0.01
                blue = blue + 0.01
        elif green <= 0.0:
            if (blue <= 0.0):
                red = red - 0.01
                green = green + 0.01
            else:
                blue = blue - 0.01
                red = red + 0.01
        else:
            red = red - 0.01
            green = green + 0.01
        object.color = (red, green, blue)

if __name__ == '__main__':
    i = ico()
#    rate(30)
    while(1):
        i.rotate(0.005)
        i.cycleColors()