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Bug fix to how Succession behave when Scene.play changes its runtime

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Grant Sanderson
2018-01-14 19:26:53 -08:00
parent 016e2c9ada
commit 0e961c85e0
1 changed files with 12 additions and 2 deletions
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14
animation/simple_animations.py
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@ -382,6 +382,10 @@ class Succession(Animation):
run_time = sum(self.run_times)
self.num_anims = len(animations)
self.animations = animations
self.last_index = 0
#Have to keep track of this run_time, because Scene.play
#might very well mess with it.
self.original_run_time = run_time
mobject = Group(*[anim.mobject for anim in self.animations])
Animation.__init__(self, mobject, run_time = run_time, **kwargs)
@ -392,11 +396,17 @@ class Succession(Animation):
return
run_times = self.run_times
index = 0
time = alpha*self.run_time
time = alpha*self.original_run_time
while sum(run_times[:index+1]) < time:
index += 1
if index > self.last_index:
self.animations[self.last_index].update(1)
self.animations[self.last_index].clean_up()
self.last_index = index
curr_anim = self.animations[index]
sub_alpha = (time - sum(run_times[:index]))/run_times[index]
sub_alpha = np.clip(
(time - sum(run_times[:index]))/run_times[index], 0, 1
)
curr_anim.update(sub_alpha)
class AnimationGroup(Animation):