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Preliminary finish of chapter 7 animations

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Grant Sanderson
2016-08-22 21:22:21 -07:00
parent 3391e645d7
commit 87c390f41e
9 changed files with 339 additions and 89 deletions
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4
animation/animation.py
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@ -21,6 +21,7 @@ class Animation(object):
#Options are lagged_start, smoothed_lagged_start,
#one_at_a_time, all_at_once
"submobject_mode" : "lagged_start",
"lag_factor" : 2,
}
def __init__(self, mobject, **kwargs):
mobject = instantiate(mobject)
@ -77,7 +78,8 @@ class Animation(object):
prop = float(index)/num_submobjects
if self.submobject_mode is "smoothed_lagged_start":
prop = smooth(prop)
return np.clip(2*alpha - prop, 0, 1)
lf = self.lag_factor
return np.clip(lf*alpha - (lf-1)*prop, 0, 1)
elif self.submobject_mode == "one_at_a_time":
lower = float(index)/num_submobjects
upper = float(index+1)/num_submobjects