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47 lines
1.7 KiB
Python
47 lines
1.7 KiB
Python
from manimlib.animation.animation import Animation
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from manimlib.utils.bezier import interpolate
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from manimlib.utils.config_ops import digest_config
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class ChangingDecimal(Animation):
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CONFIG = {
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"num_decimal_places": None,
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"show_ellipsis": None,
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"position_update_func": None,
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"include_sign": None,
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"tracked_mobject": None,
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}
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def __init__(self, decimal_number_mobject, number_update_func, **kwargs):
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digest_config(self, kwargs, locals())
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if self.tracked_mobject:
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dmc = decimal_number_mobject.get_center()
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tmc = self.tracked_mobject.get_center()
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self.diff_from_tracked_mobject = dmc - tmc
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self.diff_from_tracked_mobject = dmc - tmc
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Animation.__init__(self, decimal_number_mobject, **kwargs)
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def update_mobject(self, alpha):
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self.update_number(alpha)
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self.update_position()
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def update_number(self, alpha):
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self.decimal_number_mobject.set_value(
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self.number_update_func(alpha)
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)
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def update_position(self):
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if self.position_update_func is not None:
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self.position_update_func(self.decimal_number_mobject)
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elif self.tracked_mobject is not None:
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self.decimal_number_mobject.move_to(
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self.tracked_mobject.get_center() + self.diff_from_tracked_mobject)
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class ChangeDecimalToValue(ChangingDecimal):
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def __init__(self, decimal_number_mobject, target_number, **kwargs):
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start_number = decimal_number_mobject.number
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def func(alpha):
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return interpolate(start_number, target_number, alpha)
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ChangingDecimal.__init__(self, decimal_number_mobject, func, **kwargs)
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