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57 lines
1.7 KiB
Python
57 lines
1.7 KiB
Python
from __future__ import absolute_import
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from continual_animation.continual_animation import ContinualAnimation
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from animation.update import MaintainPositionRelativeTo
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from mobject.value_tracker import ValueTracker
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class ContinualUpdateFromFunc(ContinualAnimation):
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CONFIG = {
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"function_depends_on_dt": False
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}
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def __init__(self, mobject, func, **kwargs):
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self.func = func
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ContinualAnimation.__init__(self, mobject, **kwargs)
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def update_mobject(self, dt):
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if self.function_depends_on_dt:
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self.func(self.mobject, dt)
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else:
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self.func(self.mobject)
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class ContinualUpdateFromTimeFunc(ContinualUpdateFromFunc):
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CONFIG = {
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"function_depends_on_dt": True
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}
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class ContinualMaintainPositionRelativeTo(ContinualAnimation):
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# TODO: Possibly reimplement using CycleAnimation?
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def __init__(self, mobject, tracked_mobject, **kwargs):
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self.anim = MaintainPositionRelativeTo(
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mobject, tracked_mobject, **kwargs)
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ContinualAnimation.__init__(self, mobject, **kwargs)
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def update_mobject(self, dt):
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self.anim.update(0) # 0 is arbitrary
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# TODO, maybe factor into a different file
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class ContinualGrowValue(ContinualAnimation):
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CONFIG = {
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"rate": 1,
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}
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def __init__(self, value_tracker, **kwargs):
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if not isinstance(value_tracker, ValueTracker):
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raise Exception("ContinualGrowValue must take a ValueTracker as its mobject")
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self.value_tracker = value_tracker
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ContinualAnimation.__init__(self, value_tracker, **kwargs)
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def update_mobject(self, dt):
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self.value_tracker.set_value(
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self.value_tracker.get_value() + self.rate * dt
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)
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