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tweaked coin flipping motion

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Ben Hambrecht 2018-05-03 12:16:21 +02:00
parent a222181d77
commit fa00363313
1 changed files with 6 additions and 3 deletions
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9
active_projects/eop/chapter1.py
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@ -114,8 +114,10 @@ class CoinFlippingPiCreature(PiCreature):
self.coin = coin
self.add(coin)
right_arm = self.get_arm_copies()[1]
coin.rotate(-TAU/24)
coin.next_to(right_arm, RIGHT+UP, buff = 0)
coin.shift(0.15 * self.get_width() * LEFT)
coin.shift(0.1 * self.get_width() * LEFT)
coin.shift(0.2 * DOWN)
def flip_coin_up(self):
self.change("coin_flip_2")
@ -125,17 +127,18 @@ class CoinFlippingPiCreature(PiCreature):
class FlipUpAndDown(Animation):
CONFIG = {
"vector" : UP,
"height" : 3,
"nb_turns" : 1
}
def update(self,t):
self.mobject.shift(4 * t * (1 - t) * self.vector)
self.mobject.shift(self.height * 4 * t * (1 - t) * self.vector)
self.mobject.rotate(t * self.nb_turns * TAU)
class FlipCoin(AnimationGroup):
CONFIG = {
"coin_rate_func" : there_and_back,
"pi_rate_func" : there_and_back_with_pause
"pi_rate_func" : lambda t : there_and_back_with_pause(t, 1./4)
}
def __init__(self, pi_creature, **kwargs):
digest_config(self, kwargs)