## simulate many coins flipping at once.
## Have a reference coin (coin on the far right) and coins
## with slightly different initial angles. See how small the
## difference in angle must be for a coin to have the same
## result as the reference coin.

from CoinFlipModule import *
scene.autoscale = 0
floor=box(color=color.white,
          pos=(0,-0.3,0),
          height=0.4,width=8,length=36)

## make a list of coins - they only differ in their initial angle.
ref_angle = 1.0
coinlist = []
for i in range(9):
    anglediff = 0.1**i
    xposition = i * 3 - 12
    print "adding coin with difference in angle of", anglediff
    c = makecoin(xposition, ref_angle + anglediff)
    coinlist.append(c)

# add reference coin - this is the coin on the far right
coinlist.append(makecoin(15, ref_angle))
print "Reference coin is at x=15, with angle ",ref_angle 
    

dt = 0.002
## while the reference coin is still moving
while coinmoving(coinlist[9]):
    # update all of the coins in the list (0.08 is the momentum
    # lost in each bounce - if 0, would bounce forever.)
    for coin in coinlist:
        coinupdate(coin, 0.08, dt)