Remove CycleAnimation ContinualAnimation, replace with cycle_animation which adds a mobject updater

manimlib/continual_animation/from_animation.py

@@ -1,12 +0,0 @@
-from manimlib.continual_animation.continual_animation import ContinualAnimation
-
-
-class CycleAnimation(ContinualAnimation):
-    def __init__(self, animation, **kwargs):
-        self.animation = animation
-        ContinualAnimation.__init__(self, animation.mobject, **kwargs)
-
-    def update_mobject(self, dt):
-        mod_value = self.internal_time % self.animation.run_time
-        alpha = mod_value / float(self.animation.run_time)
-        self.animation.update(alpha)

manimlib/continual_animation/numbers.py

@@ -1,9 +1,9 @@
-from manimlib.animation.numbers import ChangingDecimal
+# from manimlib.animation.numbers import ChangingDecimal
-from manimlib.continual_animation.from_animation import NormalAnimationAsContinualAnimation
+# from manimlib.continual_animation.from_animation import NormalAnimationAsContinualAnimation
 
 
-class ContinualChangingDecimal(NormalAnimationAsContinualAnimation):
+# class ContinualChangingDecimal(NormalAnimationAsContinualAnimation):
-    def __init__(self, *args, **kwargs):
+#     def __init__(self, *args, **kwargs):
-        NormalAnimationAsContinualAnimation.__init__(
+#         NormalAnimationAsContinualAnimation.__init__(
-            self, ChangingDecimal(*args, **kwargs)
+#             self, ChangingDecimal(*args, **kwargs)
-        )
+#         )

manimlib/mobject/mobject_update_utils.py

@@ -34,29 +34,41 @@ def always_rotate(mobject, rate=20 * DEGREES, **kwargs):
     return mobject
 
 
-def turn_animation_into_updater(animation):
+def turn_animation_into_updater(animation, cycle=False, **kwargs):
     """
-    Note sure if this is actually useful.  This is really
+    Add an updater to the animation's mobject which applies
-    here just to replace past usage of
+    the interpolation and update functions of the animation
-    turn_animation_into_updater
+
+    If cycle is True, this repeats over and over.  Otherwise,
+    the updater will be popped uplon completion
     """
     mobject = animation.mobject
+    animation.update_config(**kwargs)
     animation.suspend_mobject_updating = False
     animation.begin()
     animation.total_time = 0
 
     def update(m, dt):
+        run_time = animation.get_run_time()
         alpha = np.clip(
-            animation.total_time / animation.get_run_time(),
+            animation.total_time / run_time,
             0, 1,
         )
-        if alpha >= 1:
+        if cycle:
+            animation.total_time = animation.total_time % run_time
+        elif alpha >= 1:
             animation.finish()
             m.remove_updater(update)
-        else:
+            return
-            animation.interpolate(alpha)
+        animation.interpolate(alpha)
-            animation.total_time += dt
+        animation.update_mobjects(dt)
-            animation.update_mobjects(dt)
+        animation.total_time += dt
 
     mobject.add_updater(update)
     return mobject
+
+
+def cycle_animation(animation, **kwargs):
+    return turn_animation_into_updater(
+        animation, cycle=True, **kwargs
+    )

old_projects/alt_calc.py

@@ -2259,7 +2259,7 @@ class GraphOnePlusOneOverX(GraphScene):
                 lag_ratio=0.5,
                 run_time=2
             )
-            line.continual_anim = CycleAnimation(line_anim)
+            cycle_animation(line_anim)
             lines.add(line)
 
         phi_line, phi_bro_line = lines

old_projects/dandelin.py

@@ -634,7 +634,7 @@ class EccentricityInThumbtackCase(ShowArrayOfEccentricities):
 
     def get_ellipse_point_update(self, ellipse):
         dot = Dot(color=RED)
-        return CycleAnimation(MoveAlongPath(
+        return cycle_animation(MoveAlongPath(
             dot, ellipse,
             run_time=5,
             rate_func=linear
@@ -1584,7 +1584,7 @@ class EllipseLengthsLinedUp(EccentricityInThumbtackCase):
         foci = self.get_foci(ellipse)
 
         point = VectorizedPoint()
-        point_movement = CycleAnimation(
+        point_movement = cycle_animation(
             MoveAlongPath(
                 point, ellipse,
                 run_time=5,