Created fading.py and growing.py to help break up animation.creation.py

big_ol_pile_of_manim_imports.py

@@ -19,6 +19,8 @@ from manimlib.constants import *
 from manimlib.animation.animation import *
 from manimlib.animation.composition import *
 from manimlib.animation.creation import *
+from manimlib.animation.fading import *
+from manimlib.animation.growing import *
 from manimlib.animation.indication import *
 from manimlib.animation.movement import *
 from manimlib.animation.numbers import *

manimlib/animation/creation.py

@@ -1,16 +1,7 @@
-import numpy as np
-
 from manimlib.animation.animation import Animation
-from manimlib.animation.transform import Transform
-from manimlib.animation.composition import Succession
-from manimlib.animation.composition import LaggedStart
-from manimlib.constants import *
 from manimlib.mobject.types.vectorized_mobject import VMobject
-from manimlib.mobject.types.vectorized_mobject import VGroup
-from manimlib.utils.bezier import interpolate
 from manimlib.utils.bezier import integer_interpolate
 from manimlib.utils.config_ops import digest_config
-from manimlib.utils.paths import counterclockwise_path
 from manimlib.utils.rate_functions import linear
 from manimlib.utils.rate_functions import double_smooth
 from manimlib.utils.rate_functions import smooth
@@ -129,168 +120,10 @@ class Write(DrawBorderThenFill):
 
 class ShowIncreasingSubsets(Animation):
     def __init__(self, group, **kwargs):
-        self.all_submobs = group.submobjects
+        self.all_submobs = list(group.submobjects)
         Animation.__init__(self, group, **kwargs)
 
     def interpolate_mobject(self, alpha):
         n_submobs = len(self.all_submobs)
         index = int(alpha * n_submobs)
         self.mobject.submobjects = self.all_submobs[:index]
-
-# Fading
-
-
-class FadeOut(Transform):
-    CONFIG = {
-        "remover": True,
-    }
-
-    def __init__(self, mobject, **kwargs):
-        target = mobject.copy()
-        target.fade(1)
-        Transform.__init__(self, mobject, target, **kwargs)
-
-    def clean_up_from_scene(self, scene=None):
-        Transform.clean_up_from_scene(self, scene)
-        self.interpolate(0)
-
-
-class FadeIn(Transform):
-    def __init__(self, mobject, **kwargs):
-        target = mobject.copy()
-        Transform.__init__(self, mobject, target, **kwargs)
-        self.starting_mobject.fade(1)
-        if isinstance(self.starting_mobject, VMobject):
-            self.starting_mobject.set_stroke(width=0)
-            self.starting_mobject.set_fill(opacity=0)
-
-
-class FadeInAndShiftFromDirection(Transform):
-    CONFIG = {
-        "direction": DOWN,
-    }
-
-    def __init__(self, mobject, direction=None, **kwargs):
-        digest_config(self, kwargs)
-        target = mobject.copy()
-        if direction is None:
-            direction = self.direction
-        mobject.shift(direction)
-        mobject.fade(1)
-        Transform.__init__(self, mobject, target, **kwargs)
-
-
-class FadeInFrom(FadeInAndShiftFromDirection):
-    """
-    Alternate name for FadeInAndShiftFromDirection
-    """
-
-
-class FadeInFromDown(FadeInAndShiftFromDirection):
-    """
-    Essential a more convenient form of FadeInAndShiftFromDirection
-    """
-    CONFIG = {
-        "direction": DOWN,
-    }
-
-
-class FadeOutAndShift(FadeOut):
-    CONFIG = {
-        "direction": DOWN,
-    }
-
-    def __init__(self, mobject, direction=None, **kwargs):
-        FadeOut.__init__(self, mobject, **kwargs)
-        if direction is None:
-            direction = self.direction
-        self.target_mobject.shift(direction)
-
-
-class FadeOutAndShiftDown(FadeOutAndShift):
-    CONFIG = {
-        "direction": DOWN,
-    }
-
-
-class FadeInFromLarge(Transform):
-    def __init__(self, mobject, scale_factor=2, **kwargs):
-        target = mobject.copy()
-        mobject.scale(scale_factor)
-        mobject.fade(1)
-        Transform.__init__(self, mobject, target, **kwargs)
-
-
-class VFadeIn(Animation):
-    """
-    VFadeIn and VFadeOut only work for VMobjects, but they can be applied
-    to mobjects while they are being animated in some other way (e.g. shifting
-    then) in a way that does not work with FadeIn and FadeOut
-    """
-
-    def interpolate_submobject(self, submobject, starting_submobject, alpha):
-        submobject.set_stroke(
-            opacity=interpolate(0, starting_submobject.get_stroke_opacity(), alpha)
-        )
-        submobject.set_fill(
-            opacity=interpolate(0, starting_submobject.get_fill_opacity(), alpha)
-        )
-
-
-class VFadeOut(VFadeIn):
-    CONFIG = {
-        "remover": True
-    }
-
-    def interpolate_submobject(self, submobject, starting_submobject, alpha):
-        VFadeIn.interpolate_submobject(
-            self, submobject, starting_submobject, 1 - alpha
-        )
-
-
-# Growing
-
-
-class GrowFromPoint(Transform):
-    CONFIG = {
-        "point_color": None,
-    }
-
-    def __init__(self, mobject, point, **kwargs):
-        digest_config(self, kwargs)
-        target = mobject.copy()
-        mobject.scale(0)
-        mobject.move_to(point)
-        if self.point_color:
-            mobject.set_color(self.point_color)
-        Transform.__init__(self, mobject, target, **kwargs)
-
-
-class GrowFromCenter(GrowFromPoint):
-    def __init__(self, mobject, **kwargs):
-        GrowFromPoint.__init__(self, mobject, mobject.get_center(), **kwargs)
-
-
-class GrowFromEdge(GrowFromPoint):
-    def __init__(self, mobject, edge, **kwargs):
-        GrowFromPoint.__init__(
-            self, mobject, mobject.get_critical_point(edge), **kwargs
-        )
-
-
-class GrowArrow(GrowFromPoint):
-    def __init__(self, arrow, **kwargs):
-        GrowFromPoint.__init__(self, arrow, arrow.get_start(), **kwargs)
-
-
-class SpinInFromNothing(GrowFromCenter):
-    CONFIG = {
-        "path_func": counterclockwise_path()
-    }
-
-
-class ShrinkToCenter(Transform):
-    def __init__(self, mobject, **kwargs):
-        Transform.__init__(
-            self, mobject, mobject.get_point_mobject(), **kwargs
-        )

manimlib/animation/fading.py

@@ -0,0 +1,114 @@
+from manimlib.animation.animation import Animation
+from manimlib.animation.transform import Transform
+from manimlib.constants import *
+from manimlib.mobject.types.vectorized_mobject import VMobject
+from manimlib.utils.bezier import interpolate
+from manimlib.utils.config_ops import digest_config
+
+
+class FadeOut(Transform):
+    CONFIG = {
+        "remover": True,
+    }
+
+    def __init__(self, mobject, **kwargs):
+        target = mobject.copy()
+        target.fade(1)
+        Transform.__init__(self, mobject, target, **kwargs)
+
+    def clean_up_from_scene(self, scene=None):
+        Transform.clean_up_from_scene(self, scene)
+        self.interpolate(0)
+
+
+class FadeIn(Transform):
+    def __init__(self, mobject, **kwargs):
+        target = mobject.copy()
+        Transform.__init__(self, mobject, target, **kwargs)
+        self.starting_mobject.fade(1)
+        if isinstance(self.starting_mobject, VMobject):
+            self.starting_mobject.set_stroke(width=0)
+            self.starting_mobject.set_fill(opacity=0)
+
+
+class FadeInAndShiftFromDirection(Transform):
+    CONFIG = {
+        "direction": DOWN,
+    }
+
+    def __init__(self, mobject, direction=None, **kwargs):
+        digest_config(self, kwargs)
+        target = mobject.copy()
+        if direction is None:
+            direction = self.direction
+        mobject.shift(direction)
+        mobject.fade(1)
+        Transform.__init__(self, mobject, target, **kwargs)
+
+
+class FadeInFrom(FadeInAndShiftFromDirection):
+    """
+    Alternate name for FadeInAndShiftFromDirection
+    """
+
+
+class FadeInFromDown(FadeInAndShiftFromDirection):
+    """
+    Essential a more convenient form of FadeInAndShiftFromDirection
+    """
+    CONFIG = {
+        "direction": DOWN,
+    }
+
+
+class FadeOutAndShift(FadeOut):
+    CONFIG = {
+        "direction": DOWN,
+    }
+
+    def __init__(self, mobject, direction=None, **kwargs):
+        FadeOut.__init__(self, mobject, **kwargs)
+        if direction is None:
+            direction = self.direction
+        self.target_mobject.shift(direction)
+
+
+class FadeOutAndShiftDown(FadeOutAndShift):
+    CONFIG = {
+        "direction": DOWN,
+    }
+
+
+class FadeInFromLarge(Transform):
+    def __init__(self, mobject, scale_factor=2, **kwargs):
+        target = mobject.copy()
+        mobject.scale(scale_factor)
+        mobject.fade(1)
+        Transform.__init__(self, mobject, target, **kwargs)
+
+
+class VFadeIn(Animation):
+    """
+    VFadeIn and VFadeOut only work for VMobjects, but they can be applied
+    to mobjects while they are being animated in some other way (e.g. shifting
+    then) in a way that does not work with FadeIn and FadeOut
+    """
+
+    def interpolate_submobject(self, submobject, starting_submobject, alpha):
+        submobject.set_stroke(
+            opacity=interpolate(0, starting_submobject.get_stroke_opacity(), alpha)
+        )
+        submobject.set_fill(
+            opacity=interpolate(0, starting_submobject.get_fill_opacity(), alpha)
+        )
+
+
+class VFadeOut(VFadeIn):
+    CONFIG = {
+        "remover": True
+    }
+
+    def interpolate_submobject(self, submobject, starting_submobject, alpha):
+        VFadeIn.interpolate_submobject(
+            self, submobject, starting_submobject, 1 - alpha
+        )

manimlib/animation/growing.py

@@ -0,0 +1,48 @@
+from manimlib.animation.transform import Transform
+from manimlib.utils.config_ops import digest_config
+from manimlib.utils.paths import counterclockwise_path
+
+
+class GrowFromPoint(Transform):
+    CONFIG = {
+        "point_color": None,
+    }
+
+    def __init__(self, mobject, point, **kwargs):
+        digest_config(self, kwargs)
+        target = mobject.copy()
+        mobject.scale(0)
+        mobject.move_to(point)
+        if self.point_color:
+            mobject.set_color(self.point_color)
+        Transform.__init__(self, mobject, target, **kwargs)
+
+
+class GrowFromCenter(GrowFromPoint):
+    def __init__(self, mobject, **kwargs):
+        GrowFromPoint.__init__(self, mobject, mobject.get_center(), **kwargs)
+
+
+class GrowFromEdge(GrowFromPoint):
+    def __init__(self, mobject, edge, **kwargs):
+        GrowFromPoint.__init__(
+            self, mobject, mobject.get_critical_point(edge), **kwargs
+        )
+
+
+class GrowArrow(GrowFromPoint):
+    def __init__(self, arrow, **kwargs):
+        GrowFromPoint.__init__(self, arrow, arrow.get_start(), **kwargs)
+
+
+class SpinInFromNothing(GrowFromCenter):
+    CONFIG = {
+        "path_func": counterclockwise_path()
+    }
+
+
+class ShrinkToCenter(Transform):
+    def __init__(self, mobject, **kwargs):
+        Transform.__init__(
+            self, mobject, mobject.get_point_mobject(), **kwargs
+        )

manimlib/animation/indication.py

@@ -9,7 +9,7 @@ from manimlib.animation.composition import AnimationGroup
 from manimlib.animation.composition import Succession
 from manimlib.animation.creation import ShowCreation
 from manimlib.animation.creation import ShowPartial
-from manimlib.animation.creation import FadeOut
+from manimlib.animation.fading import FadeOut
 from manimlib.animation.transform import Transform
 from manimlib.animation.update import UpdateFromAlphaFunc
 from manimlib.mobject.mobject import Mobject

manimlib/for_3b1b_videos/common_scenes.py

@@ -2,9 +2,9 @@ import random
 
 from manimlib.animation.composition import OldLaggedStart
 from manimlib.animation.creation import DrawBorderThenFill
-from manimlib.animation.creation import FadeIn
-from manimlib.animation.creation import FadeOut
 from manimlib.animation.creation import Write
+from manimlib.animation.fading import FadeIn
+from manimlib.animation.fading import FadeOut
 from manimlib.constants import *
 from manimlib.continual_animation.continual_animation import ContinualMovement
 from manimlib.for_3b1b_videos.pi_creature import Mortimer

manimlib/for_3b1b_videos/pi_creature_animations.py

@@ -1,6 +1,6 @@
 from manimlib.animation.animation import Animation
 from manimlib.animation.composition import AnimationGroup
-from manimlib.animation.creation import FadeOut
+from manimlib.animation.fading import FadeOut
 from manimlib.animation.creation import ShowCreation
 from manimlib.animation.creation import Write
 from manimlib.animation.transform import ApplyMethod

manimlib/mobject/svg/brace.py

@@ -1,9 +1,9 @@
 import numpy as np
 
 from manimlib.animation.composition import AnimationGroup
-from manimlib.animation.creation import FadeIn
-from manimlib.animation.creation import GrowFromCenter
 from manimlib.constants import *
+from manimlib.animation.fading import FadeIn
+from manimlib.animation.growing import GrowFromCenter
 from manimlib.mobject.svg.tex_mobject import TexMobject
 from manimlib.mobject.svg.tex_mobject import TextMobject
 from manimlib.mobject.types.vectorized_mobject import VMobject

manimlib/once_useful_constructs/counting.py

@@ -1,5 +1,5 @@
-from manimlib.animation.creation import FadeIn
 from manimlib.animation.creation import ShowCreation
+from manimlib.animation.fading import FadeIn
 from manimlib.animation.transform import MoveToTarget
 from manimlib.animation.transform import Transform
 from manimlib.constants import *

manimlib/once_useful_constructs/light.py

@@ -3,8 +3,8 @@ from traceback import *
 from scipy.spatial import ConvexHull
 
 from manimlib.animation.composition import OldLaggedStart
-from manimlib.animation.creation import FadeIn
-from manimlib.animation.creation import FadeOut
+from manimlib.animation.fading import FadeIn
+from manimlib.animation.fading import FadeOut
 from manimlib.animation.transform import Transform
 from manimlib.constants import *
 from manimlib.continual_animation.continual_animation import ContinualAnimation

manimlib/once_useful_constructs/matrix_multiplication.py

@@ -1,7 +1,7 @@
 import numpy as np
 
-from manimlib.animation.creation import FadeOut
 from manimlib.animation.creation import ShowCreation
+from manimlib.animation.fading import FadeOut
 from manimlib.animation.transform import ApplyMethod
 from manimlib.animation.transform import Transform
 from manimlib.constants import *

manimlib/scene/vector_space_scene.py

@@ -1,10 +1,10 @@
 import numpy as np
 
 from manimlib.animation.animation import Animation
-from manimlib.animation.creation import FadeOut
-from manimlib.animation.creation import GrowArrow
 from manimlib.animation.creation import ShowCreation
 from manimlib.animation.creation import Write
+from manimlib.animation.fading import FadeOut
+from manimlib.animation.growing import GrowArrow
 from manimlib.animation.transform import ApplyFunction
 from manimlib.animation.transform import ApplyPointwiseFunction
 from manimlib.animation.transform import Transform