Merge pull request #829 from 3b1b/bayes

Bayes

LICENSE

@@ -1,4 +1,4 @@
-All files of this project under the director "projects" are copyright 3Blue1Brown LLC and used by permission for this project only.
+All files of this project under the directory "projects" are copyright 3Blue1Brown LLC and used by permission for this project only.
 
 Any other file of this project is available under the MIT license as follow:
 

manimlib/for_3b1b_videos/pi_creature_animations.py

@@ -1,7 +1,7 @@
 from manimlib.animation.animation import Animation
 from manimlib.animation.composition import AnimationGroup
 from manimlib.animation.fading import FadeOut
-from manimlib.animation.creation import ShowCreation
+from manimlib.animation.creation import DrawBorderThenFill
 from manimlib.animation.creation import Write
 from manimlib.animation.transform import ApplyMethod
 from manimlib.animation.transform import MoveToTarget
@@ -28,7 +28,7 @@ class PiCreatureBubbleIntroduction(AnimationGroup):
         "target_mode": "speaking",
         "bubble_class": SpeechBubble,
         "change_mode_kwargs": {},
-        "bubble_creation_class": ShowCreation,
+        "bubble_creation_class": DrawBorderThenFill,
         "bubble_creation_kwargs": {},
         "bubble_kwargs": {},
         "content_introduction_class": Write,

manimlib/for_3b1b_videos/pi_creature_scene.py

@@ -254,6 +254,9 @@ class TeacherStudentsScene(PiCreatureScene):
         "student_scale_factor": 0.8,
         "seconds_to_blink": 2,
         "screen_height": 3,
+        "camera_config": {
+            "background_color": DARKER_GREY,
+        },
     }
 
     def setup(self):

manimlib/imports.py

@@ -86,6 +86,7 @@ from manimlib.scene.zoomed_scene import *
 from manimlib.utils.bezier import *
 from manimlib.utils.color import *
 from manimlib.utils.config_ops import *
+from manimlib.utils.debug import *
 from manimlib.utils.images import *
 from manimlib.utils.iterables import *
 from manimlib.utils.file_ops import *

manimlib/mobject/mobject.py

@@ -971,12 +971,6 @@ class Mobject(Container):
                 submob.shuffle(recursive=True)
         random.shuffle(self.submobjects)
 
-    def print_family(self, n_tabs=0):
-        """For debugging purposes"""
-        print("\t" * n_tabs, self, id(self))
-        for submob in self.submobjects:
-            submob.print_family(n_tabs + 1)
-
     # Just here to keep from breaking old scenes.
     def arrange_submobjects(self, *args, **kwargs):
         return self.arrange(*args, **kwargs)

manimlib/mobject/shape_matchers.py

@@ -72,3 +72,14 @@ class Cross(VGroup):
                         )
         self.replace(mobject, stretch=True)
         self.set_stroke(self.stroke_color, self.stroke_width)
+
+
+class Underline(Line):
+    CONFIG = {
+        "buff": SMALL_BUFF,
+    }
+
+    def __init__(self, mobject, **kwargs):
+        super().__init__(LEFT, RIGHT)
+        self.match_width(mobject)
+        self.next_to(mobject, DOWN, buff=self.buff)

manimlib/mobject/svg/tex_mobject.py

@@ -78,6 +78,10 @@ class SingleStringTexMobject(SVGMobject):
         if tex == "":
             tex = "\\quad"
 
+        # To keep files from starting with a line break
+        if tex.startswith("\\\\"):
+            tex = tex.replace("\\\\", "\\quad\\\\")
+
         # Handle imbalanced \left and \right
         num_lefts, num_rights = [
             len([
@@ -171,8 +175,10 @@ class TexMobject(SingleStringTexMobject):
         """
         new_submobjects = []
         curr_index = 0
+        config = dict(self.CONFIG)
+        config["alignment"] = ""
         for tex_string in self.tex_strings:
-            sub_tex_mob = SingleStringTexMobject(tex_string, **self.CONFIG)
+            sub_tex_mob = SingleStringTexMobject(tex_string, **config)
             num_submobs = len(sub_tex_mob.submobjects)
             new_index = curr_index + num_submobs
             if num_submobs == 0:

manimlib/utils/debug.py

@@ -0,0 +1,21 @@
+from manimlib.constants import BLACK
+from manimlib.mobject.numbers import Integer
+from manimlib.mobject.types.vectorized_mobject import VGroup
+
+
+def print_family(mobject, n_tabs=0):
+    """For debugging purposes"""
+    print("\t" * n_tabs, mobject, id(mobject))
+    for submob in mobject.submobjects:
+        submob.print_family(n_tabs + 1)
+
+
+def get_submobject_index_labels(mobject, label_height=0.15):
+    labels = VGroup()
+    for n, submob in enumerate(mobject):
+        label = Integer(n)
+        label.set_height(label_height)
+        label.move_to(submob)
+        label.set_stroke(BLACK, 5, background=True)
+        labels.add(label)
+    return labels