PiTauDebate as opening scene of pi day script

active_projects/pi_day.py

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+from helpers import *
+
+from mobject.tex_mobject import TexMobject
+from mobject import Mobject
+from mobject.image_mobject import ImageMobject
+from mobject.vectorized_mobject import *
+
+from animation.animation import Animation
+from animation.transform import *
+from animation.simple_animations import *
+from animation.compositions import *
+from animation.playground import *
+from animation.continual_animation import *
+from topics.geometry import *
+from topics.characters import *
+from topics.functions import *
+from topics.fractals import *
+from topics.number_line import *
+from topics.combinatorics import *
+from topics.numerals import *
+from topics.three_dimensions import *
+from topics.objects import *
+from topics.probability import *
+from topics.complex_numbers import *
+from scene import Scene
+from scene.reconfigurable_scene import ReconfigurableScene
+from scene.zoomed_scene import *
+from scene.moving_camera_scene import *
+from camera import *
+from mobject.svg_mobject import *
+from mobject.tex_mobject import *
+from topics.graph_scene import *
+
+class PiTauDebate(PiCreatureScene):
+    def construct(self):
+        pi, tau = self.pi, self.tau
+
+        self.add(pi, tau)
+
+        self.play(PiCreatureSays(
+            pi, "3.1415...!",
+            target_mode = "angry",
+            look_at_arg = tau.eyes,
+            # bubble_kwargs = {"width" : 3}
+        ))
+        self.play(PiCreatureSays(
+            tau, "6.2831...!",
+            target_mode = "angry",
+            look_at_arg = pi.eyes,
+            bubble_kwargs = {"width" : 3, "height" : 2},
+        ))
+        self.wait(2)
+        self.play(
+            RemovePiCreatureBubble(pi),
+            RemovePiCreatureBubble(tau),
+        )
+
+        # Show tau
+        circle = Circle(color = YELLOW, radius = 1.25)
+        circle.next_to(tau, UP, MED_LARGE_BUFF)
+        circle.to_edge(RIGHT, buff = 2)
+        circle.to_edge(UP)
+        radius = Line(circle.get_center(), circle.get_right())
+        radius.highlight(WHITE)
+        one = TexMobject("1")
+        kwargs = {"run_time" : 3, "rate_func" : bezier([0, 0, 1, 1])} 
+        one_update = UpdateFromFunc(
+            one, lambda m : m.move_to(
+                radius.get_center() + \
+                0.25*rotate_vector(radius.get_vector(), TAU/4)
+            ),
+            **kwargs
+        )
+        decimal = DecimalNumber(0, num_decimal_points = 4, show_ellipsis = True)
+        decimal.scale(0.75)
+        changing_decimal = ChangingDecimal(
+            decimal, lambda a : a*TAU,
+            position_update_func = lambda m : m.next_to(
+                radius.get_end(), RIGHT,
+                aligned_edge = DOWN,
+            ),
+            **kwargs
+        )
+
+        self.play(ShowCreation(radius), Write(one))
+        self.play(
+            tau.change, "hooray",
+            pi.change, "sassy",
+            Rotating(radius, about_point = radius.get_start(), **kwargs),
+            ShowCreation(circle, **kwargs),
+            changing_decimal,
+            one_update,
+        )
+        self.wait()
+
+
+        # Show pi
+        circle = Circle(color = RED, radius = 1.25/2)
+        circle.rotate(TAU/4)
+        circle.move_to(pi)
+        circle.to_edge(UP, buff = MED_LARGE_BUFF)
+        diameter = Line(circle.get_left(), circle.get_right())
+        one = TexMobject("1")
+        one.scale(0.75)
+        one.next_to(diameter, UP, SMALL_BUFF)
+
+        circum_line = diameter.copy().scale(np.pi)
+        circum_line.match_style(circle)
+        circum_line.next_to(circle, DOWN, buff = MED_LARGE_BUFF)
+        # circum_line.to_edge(LEFT)
+        brace = Brace(circum_line, DOWN, buff = SMALL_BUFF)
+        decimal = DecimalNumber(np.pi, num_decimal_points = 4, show_ellipsis = True)
+        decimal.scale(0.75)
+        decimal.next_to(brace, DOWN, SMALL_BUFF)
+
+        self.play(
+            FadeIn(VGroup(circle, diameter, one)),
+            tau.change, "confused",
+            pi.change, "hooray"
+        )
+        self.add(circle.copy().fade(0.5))
+        self.play(
+            ReplacementTransform(circle, circum_line, run_time = 2)
+        )
+        self.play(GrowFromCenter(brace), Write(decimal))
+        self.wait(3)
+        # self.play()
+
+
+    def create_pi_creatures(self):
+        pi = self.pi = Randolph()
+        pi.to_edge(DOWN).shift(4*LEFT)
+        tau = self.tau = TauCreature(
+            # mode = "angry",
+            file_name_prefix = "TauCreatures",
+            color = GREEN_E
+        ).flip()
+        tau.to_edge(DOWN).shift(4*RIGHT)
+        return VGroup(pi, tau)
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