def __init__(self, radius=150):
        Shape3D.__init__(self)
        self.topPent = [PVector() for _ in range(5)]
        self.bottomPent = [PVector() for _ in range(5)]
        c = dist(cos(0) * radius,
                 sin(0) * radius,
                 cos(radians(72)) * radius,
                 sin(radians(72)) * radius)
        b = radius
        a = sqrt((c**2) + (b**2))
        self.triHeight = sqrt((c**2) - (c / 2)**2)
        angle = 0
        for i in range(5):
            self.topPent[i] = PVector(cos(angle) * radius,
                                      sin(angle) * radius,
                                      self.triHeight / 2.0)
            angle += radians(72)
        self.topPoint = PVector(0, 0, self.triHeight / 2.0 + a)
        angle = 72.0 / 2.0
        for i in range(5):
            self.bottomPent[i] = PVector(cos(angle) * radius,
                                         sin(angle) * radius,
                                         -self.triHeight / 2.0)
            angle += radians(72)
        self.bottomPoint = PVector(0, 0, -(self.triHeight / 2.0 + a))

    # Draw icosahedron.
dataset/ETHPy150Open jdf/processing.py/mode/examples/Topics/Geometry/Icosahedra/icosahedron.py/Icosahedron.__init__/operator `-` -> `+`