def radius_func(t):
# Get larger until the middle, then get smaller again.
if t < 0.5:
return lerp(0, 3.5, t)
else:
return lerp(3.5, 0, t)
def line(t):
x = lerp(start.x, end.x, t)
y = lerp(start.y, end.y, t)
z = lerp(start.z, end.z, t)
return (x, y, z)