Random cleanups to eoc

eoc/chapter3.py

@@ -1659,6 +1659,8 @@ class OneOverX(PiCreatureScene, GraphScene):
         self.y_max = self.y_axis_height/self.unit_length
 
     def construct(self):
+        self.force_skipping()
+
         self.introduce_function()
         self.introduce_puddle()
         self.introduce_graph()
@@ -1704,7 +1706,7 @@ class OneOverX(PiCreatureScene, GraphScene):
             run_time = 2
         )
         self.dither()
-        self.play(*self.get_bubble_fade_anims())
+        self.play(RemovePiCreatureBubble(self.pi_creature))
 
     def introduce_puddle(self):
         rect_group = self.get_rectangle_group(self.start_x_value)
@@ -1805,8 +1807,16 @@ class OneOverX(PiCreatureScene, GraphScene):
         df_brace = Brace(h_lines, RIGHT, buff = 0)
         df_label = df_brace.get_text("$d\\left(\\frac{1}{x}\\right)$")
         df_brace.add(df_label)
-        minus_sign = TexMobject("-")
-        minus_sign.move_to(df_label, LEFT)
+
+        negative = TextMobject("Negative")
+        negative.highlight(RED)
+        negative.next_to(df_label, UP+RIGHT)
+        negative.shift(RIGHT)
+        negative_arrow = Arrow(
+            negative.get_left(),
+            df_label.get_corner(UP+RIGHT),
+            color = RED
+        )
 
         area_changes = VGroup()
         point_pairs = [
@@ -1888,9 +1898,10 @@ class OneOverX(PiCreatureScene, GraphScene):
             ShowCreation(area_lost_arrow)
         )
         self.dither()
+        self.revert_to_original_skipping_status()###
         self.play(
-            Write(minus_sign),
-            df_label.next_to, minus_sign, RIGHT, SMALL_BUFF
+            Write(negative),
+            ShowCreation(negative_arrow)
         )
         self.dither()
         self.play(

eoc/chapter9.py

@@ -0,0 +1,70 @@
+from helpers import *
+import scipy
+
+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.playground 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 scene import Scene
+from scene.zoomed_scene import ZoomedScene
+from scene.reconfigurable_scene import ReconfigurableScene
+from camera import Camera
+from mobject.svg_mobject import *
+from mobject.tex_mobject import *
+
+from eoc.graph_scene import GraphScene
+from eoc.chapter1 import Thumbnail as Chapter1Thumbnail
+from topics.common_scenes import OpeningQuote, PatreonThanks
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topics/three_dimensions.py

@@ -76,7 +76,7 @@ class ThreeDCamera(CameraWithPerspective):
             three_d_status = map(is_3d, vmobs)
             has_points = [vm.get_num_points() > 0 for vm in vmobs]
             if all(three_d_status) and all(has_points):
-                cmp_vect = self.get_unit_normal_vect(vm)
+                cmp_vect = self.get_unit_normal_vect(vmobs[1])
                 return cmp(*[
                     np.dot(vm.get_center(), cmp_vect)
                     for vm in vmobs
@@ -98,8 +98,8 @@ def is_3d(mobject):
     return hasattr(mobject, "part_of_3d_mobject")
 
 class ThreeDMobject(VMobject):
-    def __init__(self, **kwargs):
-        VMobject.__init__(self, **kwargs)
+    def __init__(self, *args, **kwargs):
+        VMobject.__init__(self, *args, **kwargs)
         for submobject in self.submobject_family():
             submobject.part_of_3d_mobject = True