example

examples/manim/updater_scene.py

+from manim import *
+
+
+class ExampleUpdater(Scene):
+    def construct(self):
+        self.camera.background_color = WHITE
+        Text.set_default(color=BLACK)
+
+        rect = Rectangle(color=BLUE)
+        circle = Circle(color=RED, fill_color=GREEN, fill_opacity=1)
+        text = Text('Manim')
+        rect_and_circle_group = VGroup(rect, circle)
+
+        def text_follow_updater(mobj: Mobject):
+            mobj.move_to(rect.get_center())
+
+        text.add_updater(text_follow_updater)
+
+        rect.shift(DOWN * 1.5)
+        circle.next_to(rect, UP)
+        text.move_to(rect.get_center())
+
+        self.add(rect, circle, text)
+
+        self.play(rect.animate.shift(RIGHT * 2))
+
+        self.play(ScaleInPlace(rect_and_circle_group, 0.75))
+        self.play(rect_and_circle_group.animate.shift(UL * 2))
+
+        self.wait(3)