from visual import *
from helix import *

L=0.1

scene.autoscale=0
scene.range=1.2*L
scene.background=color.white

wall=box(pos=vector(-L,0,0), width=L/2., height=L/2., length=L/20., color=color.red)
mass=cylinder(pos=vector(L/2.,0,0), axis=vector(L/20.,0,0), radius=L/10., color=(0.2,0.2,0.2))

spring=helix(pos=wall.pos, axis=mass.pos-wall.pos, radius=L/10., color=(1,0.7,0.2), thickness=L/100.)


mass.m=0.1
mass.v=vector(0,0,0)
mass.p=mass.m*mass.v

k=20

dt=0.001
t=0

while 1:
	rate(100)
	s=mag(mass.pos-wall.pos)-L
	rhat=norm(mass.pos-wall.pos)
	Fnet=-k*s*rhat
	mass.p=mass.p+Fnet*dt
	mass.pos=mass.pos+mass.p/mass.m*dt
	spring.modify(axis=mass.pos-spring.pos)
	t=t+dt