def __init__(self, point, color=YELLOW, **kwargs):
digest_config(self, kwargs)
lines = VGroup()
for angle in np.arange(0, TAU, TAU / self.num_lines):
line = Line(ORIGIN, self.line_length * RIGHT)
line.shift((self.flash_radius - self.line_length) * RIGHT)
line.rotate(angle, about_point=ORIGIN)
lines.add(line)
lines.move_to(point)
lines.set_color(color)
lines.set_stroke(width=3)
line_anims = [
ShowCreationThenDestruction(
line, rate_func=squish_rate_func(smooth, 0, 0.5)
)
for line in lines
]
fade_anims = [
UpdateFromAlphaFunc(
line, lambda m, a: m.set_stroke(
width=self.line_stroke_width * (1 - a)
),
rate_func=squish_rate_func(smooth, 0, 0.75)
)
for line in lines
]
AnimationGroup.__init__(
self, *line_anims + fade_anims, **kwargs
)
class Blink(ApplyMethod):
CONFIG = {
"rate_func": squish_rate_func(there_and_back)
}
def __init__(self, pi_creature, **kwargs):
ApplyMethod.__init__(self, pi_creature.blink, **kwargs)
def __init__(self, AnimationClass, mobject, arg_creator=None, **kwargs):
for key in ["rate_func", "run_time"]:
if key in AnimationClass.CONFIG:
setattr(self, key, AnimationClass.CONFIG[key])
digest_config(self, kwargs)
for key in "rate_func", "run_time", "lag_ratio":
if key in kwargs:
kwargs.pop(key)
if arg_creator is None:
def arg_creator(mobject):
return (mobject,)
self.subanimations = [
AnimationClass(
*arg_creator(submob),
run_time=self.run_time,
rate_func=squish_rate_func(
self.rate_func, beta, beta + self.lag_ratio
),
**kwargs
)
for submob, beta in zip(
mobject,
np.linspace(0, 1 - self.lag_ratio, len(mobject))
)
]
Animation.__init__(self, mobject, **kwargs)
class TransformAnimations(Transform):
CONFIG = {"rate_func": squish_rate_func(smooth)}
def __init__(self, start_anim, end_anim, **kwargs):
digest_config(self, kwargs, locals())
if "run_time" in kwargs:
self.run_time = kwargs.pop("run_time")
else:
self.run_time = max(start_anim.run_time, end_anim.run_time)
for anim in start_anim, end_anim:
anim.set_run_time(self.run_time)
if start_anim.starting_mobject.get_num_points(
) != end_anim.starting_mobject.get_num_points():
start_anim.starting_mobject.align_data(end_anim.starting_mobject)
for anim in start_anim, end_anim:
if hasattr(anim, "target_mobject"):
anim.starting_mobject.align_data(anim.target_mobject)
Transform.__init__(self, start_anim.mobject, end_anim.mobject,
**kwargs)
# Rewire starting and ending mobjects
start_anim.mobject = self.starting_mobject
end_anim.mobject = self.target_mobject
def interpolate(self, alpha):
self.start_anim.interpolate(alpha)
self.end_anim.interpolate(alpha)
Transform.interpolate(self, alpha)
def begin(self) -> None:
# This is called right as an animation is being
# played. As much initialization as possible,
# especially any mobject copying, should live in
# this method
if self.time_span is not None:
start, end = self.time_span
self.run_time = max(end, self.run_time)
self.rate_func = squish_rate_func(
self.rate_func,
start / self.run_time,
end / self.run_time,
)
self.mobject.set_animating_status(True)
self.starting_mobject = self.create_starting_mobject()
if self.suspend_mobject_updating:
# All calls to self.mobject's internal updaters
# during the animation, either from this Animation
# or from the surrounding scene, should do nothing.
# It is, however, okay and desirable to call
# the internal updaters of self.starting_mobject,
# or any others among self.get_all_mobjects()
self.mobject.suspend_updating()
self.families = list(self.get_all_families_zipped())
self.interpolate(0)
class CircleIndicate(Indicate):
"""
Type: ``Indicate``
Parameters
----------
mobject : Mobject
TODO
``CONFIG`` parameters
::
"rate_func": squish_rate_func(there_and_back, 0, 0.8),
"remover": True
"""
CONFIG = {
"rate_func": squish_rate_func(there_and_back, 0, 0.8),
"remover": True
}
def __init__(self, mobject, **kwargs):
digest_config(self, kwargs)
circle = Circle(color=self.color, **kwargs)
circle.surround(mobject)
Indicate.__init__(self, circle, **kwargs)
def get_rate_func(pi):
index = creatures_list.index(pi)
proportion = float(index) / len(creatures_list)
start_time = 0.8 * proportion
return squish_rate_func(
there_and_back,
start_time, start_time + 0.2
)
def get_rate_func(pi):
index = creatures_list.index(pi)
proportion = float(index) / len(creatures_list)
start_time = 0.8 * proportion
return squish_rate_func(
there_and_back,
start_time, start_time + 0.2
)
class CircleIndicate(Indicate):
CONFIG = {
"rate_func": squish_rate_func(there_and_back, 0, 0.8),
"remover": True
}
def __init__(self, mobject, **kwargs):
digest_config(self, kwargs)
circle = Circle(color=self.color, **kwargs)
circle.surround(mobject)
Indicate.__init__(self, circle, **kwargs)
def __init__(self, vmobject: VMobject, stroke_width: float = 2, **kwargs):
digest_config(self, kwargs)
outline = vmobject.copy()
outline.set_fill(opacity=0)
outline.set_stroke(width=stroke_width, opacity=1)
rate_func = kwargs.get("rate_func", smooth)
super().__init__(
FadeIn(vmobject,
rate_func=squish_rate_func(rate_func, self.fade_lag, 1)),
VShowPassingFlash(outline, time_width=1), **kwargs)
def get_logo_animations(self, logo):
layers = logo.spike_layers
for j, layer in enumerate(layers):
for i, spike in enumerate(layer):
spike.angle = (13 * (i + 1) * (j + 1) * TAU / 28) % TAU
if spike.angle > PI:
spike.angle -= TAU
spike.save_state()
spike.rotate(spike.angle, about_point=ORIGIN)
# spike.get_points()[1] = rotate_vector(
# spike.get_points()[1], TAU/28,
# )
# spike.get_points()[-1] = rotate_vector(
# spike.get_points()[-1], -TAU/28,
# )
def get_spike_animation(spike, **kwargs):
return Restore(spike, path_arc=-spike.angle, **kwargs)
logo.iris_background.save_state()
# logo.iris_background.scale(0.49)
logo.iris_background.set_fill(GREY_D, 0.5)
return [
Restore(
logo.iris_background,
rate_func=squish_rate_func(smooth, 2.0 / 3, 1),
run_time=3,
),
AnimationGroup(*[
LaggedStartMap(
get_spike_animation,
layer,
run_time=2,
# rate_func=squish_rate_func(smooth, a / 3.0, (a + 0.9) / 3.0),
lag_ratio=0.2,
) for layer, a in zip(layers, [0, 2, 1, 0])
]),
Animation(logo.pupil),
]
def construct(self):
logo = self.logo
name = self.channel_name
layers = logo.spike_layers
logo.save_state()
for layer in layers:
for spike in layer:
spike.save_state()
point = np.array(spike.get_points()[0])
angle = angle_of_vector(point)
spike.rotate(-angle + 90 * DEGREES)
spike.stretch_to_fit_width(0.2)
spike.stretch_to_fit_height(0.5)
spike.point = point
for spike in layer[::2]:
spike.rotate(180 * DEGREES)
layer.arrange(LEFT, buff=0.1)
layers.arrange(UP)
layers.to_edge(DOWN)
wrong_spike = layers[1][-5]
wrong_spike.real_saved_state = wrong_spike.saved_state.copy()
wrong_spike.saved_state.scale(0.25, about_point=wrong_spike.point)
wrong_spike.saved_state.rotate(90 * DEGREES)
self.wrong_spike = wrong_spike
def get_spike_animation(spike, **kwargs):
return Restore(spike, **kwargs)
logo.iris_background.save_state()
logo.iris_background.set_fill(opacity=0.0)
logo.iris_background.scale(0.8)
alt_name = name.copy()
alt_name.set_stroke(BLACK, 5)
self.play(
Restore(
logo.iris_background,
rate_func=squish_rate_func(smooth, 1.0 / 3, 1),
run_time=2,
),
AnimationGroup(*(
LaggedStartMap(
get_spike_animation,
layer,
run_time=2,
# rate_func=squish_rate_func(smooth, a / 3.0, (a + 0.9) / 3.0),
lag_ratio=2 / len(layer),
path_arc=-90 * DEGREES)
for layer, a in zip(layers, [0, 2, 1, 0]))),
Animation(logo.pupil),
Write(alt_name),
Write(name),
run_time=3)
self.wait(0.25)
self.play(Transform(
wrong_spike,
wrong_spike.real_saved_state,
),
Animation(self.logo),
run_time=0.75)
