Finished eoc8

eoc/chapter8.py

@@ -568,7 +568,8 @@ class ConstantVelocityCar(Scene):
 
 class ConstantVelocityPlot(PlotVelocity):
     CONFIG = {
-        "x_axis_label" : "Time"
+        "x_axis_label" : "Time",
+        "units_of_area_color" : BLUE_E,
     }
     def construct(self):
         self.setup_axes()
@@ -684,7 +685,7 @@ class ConstantVelocityPlot(PlotVelocity):
         square = Square(
             stroke_color = BLACK,
             stroke_width = 1,
-            fill_color = PINK,
+            fill_color = self.units_of_area_color,
             fill_opacity = 1,
         )
         square.replace(
@@ -712,6 +713,7 @@ class ConstantVelocityPlot(PlotVelocity):
         )
         self.play(Indicate(self.y_axis_label_mob))
         self.play(FadeOut(y_line))
+
         for FadeClass in FadeIn, FadeOut:
             self.play(
                 FadeClass(
@@ -756,6 +758,8 @@ class PiecewiseConstantPlot(PlotVelocity):
         "tick_size" : 0.2,
     }
     def construct(self):
+        self.force_skipping()
+
         self.setup_graph()
         self.always_changing()
         self.show_piecewise_constant_graph()
@@ -1089,7 +1093,9 @@ class PiecewiseConstantPlot(PlotVelocity):
 
     def show_v_dt_for_all_rectangles(self):
         dt_brace_group = VGroup(self.dt_brace, self.dt_label)
-        rects_subset = self.rects[10:15]
+        rects_subset = self.rects[10:20]
+
+        self.revert_to_original_skipping_status()
 
         last_rect = None
         for rect in rects_subset:
@@ -1385,9 +1391,18 @@ class PiecewiseConstantPlot(PlotVelocity):
         ticks.highlight(YELLOW)
         return ticks
 
+class DontKnowHowToHandleNonConstant(TeacherStudentsScene):
+    def construct(self):
+        self.play(*[
+            ApplyMethod(pi.change, "maybe", UP)
+            for pi in self.get_pi_creatures()
+        ])
+        self.dither(3)
+
 class CarJourneyApproximation(Scene):
     CONFIG = {
         "n_jumps" : 5,
+        "bottom_words" : "Approximated motion (5 jumps)",
     }
     def construct(self):
         points = [5*LEFT + v for v in UP, 2*DOWN]
@@ -1395,8 +1410,9 @@ class CarJourneyApproximation(Scene):
         h_line = Line(LEFT, RIGHT).scale(SPACE_WIDTH)
         words = [
             TextMobject("Real motion (smooth)").shift(3*UP),
-            TextMobject("Approximated motion (jerky)").shift(0.5*DOWN),
+            TextMobject(self.bottom_words).shift(0.5*DOWN),
         ]
+        words[1].highlight(GREEN)
 
 
         self.add(h_line, *cars + words)
@@ -1427,6 +1443,7 @@ class CarJourneyApproximation(Scene):
 class LessWrongCarJourneyApproximation(CarJourneyApproximation):
     CONFIG = {
         "n_jumps" : 20,
+        "bottom_words" : "Better approximation (20 jumps)",
     }
 
 class TellMeThatsNotSurprising(TeacherStudentsScene):
@@ -2715,9 +2732,64 @@ class NextVideo(TeacherStudentsScene):
         self.play(Write(integral))
         self.dither(5)
 
-
+class Chapter8PatreonThanks(PatreonThanks):
-
+    CONFIG = {
-
+        "specific_patrons" : [
+            "Ali Yahya",
+            "CrypticSwarm",
+            "Kaustuv DeBiswas",
+            "Kathryn Schmiedicke",
+            "Karan Bhargava",
+            "Ankit Agarwal",
+            "Yu Jun",
+            "Dave Nicponski",
+            "Damion Kistler",
+            "Juan Benet",
+            "Othman Alikhan",
+            "Markus Persson",
+            "Dan Buchoff",
+            "Derek Dai",
+            "Joseph John Cox",
+            "Luc Ritchie",
+            "Robert Teed",
+            "Jason Hise",
+            "Meshal Alshammari",
+            "Bernd Sing",
+            "Nils Schneider",
+            "James Thornton",
+            "Mustafa Mahdi",
+            "Jonathan Eppele",
+            "Mathew Bramson",
+            "Jerry Ling",
+            "Mark Govea",
+            "Vecht",
+            "Shimin Kuang",
+            "Rish Kundalia",
+            "Achille Brighton",
+            "Ripta Pasay",
+        ]
+    }
+
+class Thumbnail(FundamentalTheorem):
+    CONFIG = {
+        "x_axis_label" : "",
+        "y_axis_label" : "",
+        "graph_origin" : 1.5*DOWN + 4*LEFT,
+        "y_axis_height" : 5,
+    }
+    def construct(self):
+        self.setup_axes()
+        graph = self.get_graph(
+            lambda x : -0.01*x*(x-3)*(x-6)*(x-12) + 3,
+            color = YELLOW
+        )
+        rects = self.get_riemann_rectangles(
+            graph, 
+            x_min = 1, x_max = 8, 
+            dx = 0.5,
+        )
+
+        self.add(rects, graph)
 
 
 

topics/characters.py

@@ -125,7 +125,7 @@ class PiCreature(SVGMobject):
 
     def change(self, new_mode, look_at_arg = None):
         self.change_mode(new_mode)
-        if look_at_arg:
+        if look_at_arg is not None:
             self.look_at(look_at_arg)
         return self
 
@@ -184,7 +184,6 @@ class PiCreature(SVGMobject):
         self.look(top_mouth_point - bottom_mouth_point)
         return self
             
-
 def get_all_pi_creature_modes():
     result = []
     prefix = "PiCreatures_"
@@ -196,7 +195,6 @@ def get_all_pi_creature_modes():
             )
     return result
 
-
 class Randolph(PiCreature):
     pass #Nothing more than an alternative name
 
@@ -206,7 +204,6 @@ class Mortimer(PiCreature):
         "flip_at_start" : True,
     }
     
-
 class Mathematician(PiCreature):
     CONFIG = {
         "color" : GREY,
@@ -232,7 +229,6 @@ class BabyPiCreature(PiCreature):
             pupil.scale_in_place(self.pupil_scale_factor)
         self.look(looking_direction)
         
-
 class Blink(ApplyMethod):
     CONFIG = {
         "rate_func" : squish_rate_func(there_and_back)
@@ -360,7 +356,7 @@ class RemovePiCreatureBubble(AnimationGroup):
         if surrounding_scene is not None:
             surrounding_scene.add(self.pi_creature)
 
-    
+###########
 
 class PiCreatureScene(Scene):
     CONFIG = {
@@ -566,7 +562,6 @@ class PiCreatureScene(Scene):
             for pi in pi_creatures
         ]))
 
-
 class TeacherStudentsScene(PiCreatureScene):
     CONFIG = {
         "student_colors" : [BLUE_D, BLUE_C, BLUE_E],

topics/common_scenes.py

@@ -3,7 +3,7 @@ from helpers import *
 
 from scene.scene import Scene
 from animation.simple_animations import Write, DrawBorderThenFill
-from animation.transform import FadeIn, ApplyMethod
+from animation.transform import FadeIn, FadeOut, ApplyMethod
 from mobject.vectorized_mobject import VGroup
 from mobject.tex_mobject import TexMobject, TextMobject
 from topics.characters import Mortimer, Blink
@@ -90,8 +90,9 @@ class PatreonThanks(Scene):
             "Ripta   Pasay",
             "Felipe  Diniz",
         ],
-        "max_patrons_height" : 2*SPACE_HEIGHT - 1,
+        "patron_group_size" : 8,
         "patron_scale_val" : 0.7,
+
     }
     def construct(self):
         morty = Mortimer()
@@ -105,59 +106,41 @@ class PatreonThanks(Scene):
         patreon_logo = PatreonLogo()
         patreon_logo.next_to(morty, UP, buff = MED_LARGE_BUFF)
 
-        left_patrons = VGroup(*map(TextMobject, 
+        patrons = map(TextMobject, self.specific_patrons)
-            self.specific_patrons[:n_patrons/2]
+        patron_groups = []
-        ))
+        index = 0
-        right_patrons = VGroup(*map(TextMobject, 
+        counter = 0
-            self.specific_patrons[n_patrons/2:]
+        while index < len(patrons):
-        ))
+            next_index = index + self.patron_group_size
-        for patrons in left_patrons, right_patrons:
+            group = VGroup(*patrons[index:next_index])
-            patrons.arrange_submobjects(
+            group.arrange_submobjects(DOWN, aligned_edge = LEFT)
-                DOWN, aligned_edge = LEFT,
+            if counter%2 == 0:
-                buff = 1.5*MED_SMALL_BUFF
+                group.to_edge(LEFT)
-            )
+            else:
-
+                group.to_edge(RIGHT)
-        all_patrons = VGroup(left_patrons, right_patrons)
+            patron_groups.append(group)
-        all_patrons.scale(self.patron_scale_val)
+            index = next_index
-        for patrons, vect in (left_patrons, LEFT), (right_patrons, RIGHT):
+            counter += 1
-            patrons.to_edge(vect, buff = MED_SMALL_BUFF)
-            if patrons.get_height() > 2*SPACE_HEIGHT - LARGE_BUFF:
-                patrons.to_edge(UP, buff = MED_SMALL_BUFF)
-
-        shift_distance = max(
-            0, (all_patrons.get_height() - 2*SPACE_HEIGHT)
-        )
-        if shift_distance > 0:
-            shift_distance += 1
-        velocity = shift_distance/9.0
-        def get_shift_anim():
-            return ApplyMethod(
-                all_patrons.shift, velocity*UP,
-                rate_func = None
-            )
 
         self.play(
             morty.change_mode, "gracious",
             DrawBorderThenFill(patreon_logo),
         )
         self.play(Write(special_thanks, run_time = 1))
-        self.play(
+        for i, group in enumerate(patron_groups):
-            Write(left_patrons),
+            anims = [
-            morty.look_at, left_patrons
+                FadeIn(
-        )
+                    group, run_time = 2,
-        self.play(
+                    submobject_mode = "lagged_start",
-            Write(right_patrons),
+                    lag_factor = 4,
-            morty.look_at, right_patrons
+                ),
-        )
+                morty.look_at, group.get_top(),
-        self.play(Blink(morty), get_shift_anim())
+            ]
-        for patrons in left_patrons, right_patrons:
+            if i >= 2:
-            for index in 0, -1:
+                anims.append(FadeOut(patron_groups[i-2]))
-                self.play(
+            self.play(*anims)
-                    morty.look_at, patrons[index],
+            self.play(morty.look_at, group.get_bottom())
-                    get_shift_anim()
+            self.play(Blink(morty))
-                )
-                self.play(get_shift_anim())
-