def get_angle_from_radius(num, radius):
origin = PointedVector(0.0, 0.0, 0.0)
p1 = origin.advance(radius)
p2 = origin.turn(2 * math.pi / float(num)).advance(radius)
ray_line = origin.to_line().reverse()
side_line = p1.to_point().line_to(p2.to_point())
angle = ray_line.angle_with(side_line, intersection=p1)
return 2.0 * angle
def get_side_from_radius(num, radius):
origin = PointedVector(0.0, 0.0, 0.0)
p1 = origin.advance(radius)
p2 = origin.turn(2 * math.pi / float(num)).advance(radius)
side = p1.to_point().distance(p2.to_point())
return side
