Got rid of ContinualUpdate

big_ol_pile_of_manim_imports.py

@@ -34,9 +34,6 @@ from manimlib.camera.mapping_camera import *
 from manimlib.camera.moving_camera import *
 from manimlib.camera.three_d_camera import *
 
-from manimlib.continual_animation.continual_animation import *
-from manimlib.continual_animation.update import *
-
 from manimlib.mobject.coordinate_systems import *
 from manimlib.mobject.frame import *
 from manimlib.mobject.functions import *

manimlib/continual_animation/update.py

@@ -1,32 +0,0 @@
-from manimlib.animation.update import MaintainPositionRelativeTo
-from manimlib.continual_animation.continual_animation import ContinualAnimation
-from manimlib.mobject.value_tracker import ValueTracker
-
-
-class ContinualMaintainPositionRelativeTo(ContinualAnimation):
-    # TODO: Possibly reimplement using CycleAnimation?
-    def __init__(self, mobject, tracked_mobject, **kwargs):
-        self.anim = MaintainPositionRelativeTo(
-            mobject, tracked_mobject, **kwargs)
-        ContinualAnimation.__init__(self, mobject, **kwargs)
-
-    def update_mobject(self, dt):
-        self.anim.update(0)  # 0 is arbitrary
-
-
-# TODO, maybe factor into a different file
-class ContinualGrowValue(ContinualAnimation):
-    CONFIG = {
-        "rate": 1,
-    }
-
-    def __init__(self, value_tracker, **kwargs):
-        if not isinstance(value_tracker, ValueTracker):
-            raise Exception("ContinualGrowValue must take a ValueTracker as its mobject")
-        self.value_tracker = value_tracker
-        ContinualAnimation.__init__(self, value_tracker, **kwargs)
-
-    def update_mobject(self, dt):
-        self.value_tracker.set_value(
-            self.value_tracker.get_value() + self.rate * dt
-        )

manimlib/mobject/coordinate_systems.py

@@ -169,7 +169,7 @@ class ThreeDAxes(Axes):
             angle_of_vector(self.z_normal), OUT,
             about_point=ORIGIN
         )
-        self.axes.append(z_axis)
+        self.axes.add(z_axis)
         self.add(z_axis)
 
         self.add_3d_pieces()

manimlib/scene/three_d_scene.py

@@ -2,7 +2,6 @@ from manimlib.animation.transform import ApplyMethod
 from manimlib.camera.three_d_camera import ThreeDCamera
 from manimlib.constants import DEGREES
 from manimlib.constants import PRODUCTION_QUALITY_CAMERA_CONFIG
-from manimlib.continual_animation.update import ContinualGrowValue
 from manimlib.mobject.coordinate_systems import ThreeDAxes
 from manimlib.mobject.geometry import Line
 from manimlib.mobject.three_dimensions import Sphere
@@ -34,16 +33,15 @@ class ThreeDScene(Scene):
             self.camera.set_gamma(gamma)
 
     def begin_ambient_camera_rotation(self, rate=0.02):
-        self.ambient_camera_rotation = ContinualGrowValue(
-            self.camera.theta_tracker,
-            rate=rate
+        # TODO, use a ValueTracker for rate, so that it
+        # can begin and end smoothly
+        self.camera.theta_tracker.add_updater(
+            lambda m, dt: m.increment_value(rate * dt)
         )
-        self.add(self.ambient_camera_rotation)
+        self.add(self.camera.theta_tracker)
 
     def stop_ambient_camera_rotation(self):
-        if self.ambient_camera_rotation is not None:
-            self.remove(self.ambient_camera_rotation)
-        self.ambient_camera_rotation = None
+        self.camera.theta_tracker.clear_updaters()
 
     def move_camera(self,
                     phi=None,

old_projects/alt_calc.py

@@ -927,8 +927,14 @@ class ChangingVectorField(Scene):
         plane.add_coordinates()
         self.add(plane)
 
+        # Obviously a silly thing to do, but I'm sweeping
+        # through trying to make sure old scenes don't
+        # completely break in spots which used to have
+        # Continual animations
         time_tracker = self.time_tracker = ValueTracker(0)
-        self.add(ContinualGrowValue(time_tracker))
+        time_tracker.add_updater(
+            lambda t: t.set_value(self.get_time())
+        )
 
         vectors = self.get_vectors()
         vectors.add_updater(self.update_vectors)

old_projects/quaternions.py

@@ -2428,8 +2428,8 @@ class IntroduceStereographicProjection(MovingCameraScene):
 
         frame = self.camera_frame
         frame_height_tracker = ValueTracker(frame.get_height())
-        frame_height_growth = ContinualGrowValue(
-            frame_height_tracker, rate=0.4
+        frame_height_growth = frame_height_tracker.add_updater(
+            lambda m, dt: m.set_value(m.get_value + 0.5 * dt)
         )
 
         neg_one_tangent = VGroup(
@@ -2484,7 +2484,6 @@ class IntroduceStereographicProjection(MovingCameraScene):
                 self.add(frame, frame_height_growth)
             elif arc is arc2:
                 self.play(dot.move_to, neg_i_point)
-        frame_height_growth.begin_wind_down()
         self.wait(2)
         self.play(*map(ShowCreation, neg_one_tangent))
         self.wait()