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putnam video published
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Grant Sanderson
parent
a74743d384
commit
f7051c468d
1 changed files with 160 additions and 28 deletions
188
putnam.py
188
putnam.py
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@ -152,7 +152,8 @@ class IntroducePutnam(Scene):
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Write(median_words)
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)
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self.play(Write(median))
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self.play(Write(difficulties, run_time = 3))
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for difficulty in difficulties:
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self.play(FadeIn(difficulty))
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self.dither()
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class NatureOf5sAnd6s(TeacherStudentsScene):
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@ -848,6 +849,8 @@ class RevisitTwoDCase(TwoDCase):
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"n_random_trials" : 200,
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}
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def construct(self):
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self.force_skipping()
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self.setup_circle()
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self.show_probability()
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self.add_lines_and_comment_on_them()
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@ -1126,7 +1129,7 @@ class RevisitTwoDCase(TwoDCase):
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def second_arc_update_func(arcs):
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VGroup(*arcs[:-1]).set_stroke(width = 0)
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arcs[-1].set_stroke(BLUE, 5)
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arcs[-1].set_stroke(PINK, 6)
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return arcs
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second_arc_update = UpdateFromFunc(arcs, second_arc_update_func)
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second_arc_update.update(1)
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@ -1143,10 +1146,11 @@ class RevisitTwoDCase(TwoDCase):
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self.play(
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MoveToTarget(point_mob),
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*self.update_animations,
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run_time = 0.5
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run_time = np.sqrt(2)/4 #Hacky reasons to be irrational
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)
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self.dither()
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self.revert_to_original_skipping_status()
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do_the_rounds()
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self.triangle_update.update(1)
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self.remove(arcs)
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@ -1188,11 +1192,11 @@ class ContrastTwoRandomProcesses(TwoDCase):
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VGroup(*pair) for pair in zip(point_mobs, labels)
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])
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left_circles = VGroup(*[
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right_circles = VGroup(*[
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VGroup(circle, *point_label_groups[:i+1]).copy()
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for i in range(3)
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])
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right_circles = VGroup(
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left_circles = VGroup(
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VGroup(circle, center_lines).copy(),
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VGroup(
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circle, center_lines,
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@ -1320,6 +1324,36 @@ class Formality(TeacherStudentsScene):
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)
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self.dither(8)
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class ProblemSolvingTakeaways(Scene):
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def construct(self):
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title = TextMobject("Problem solving takeaways")
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underline = Line(LEFT, RIGHT)
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underline.scale_to_fit_width(title.get_width()*1.1)
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underline.next_to(title, DOWN)
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group = VGroup(title, underline)
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group.to_corner(UP+LEFT)
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points = VGroup(*[
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TextMobject(string, alignment = "")
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for string in [
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"Ask a simpler version \\\\ of the question",
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"Try reframing the question \\\\ around new constructs",
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]
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])
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points[0].highlight(BLUE)
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points[1].highlight(YELLOW)
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points.arrange_submobjects(
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DOWN, buff = LARGE_BUFF,
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aligned_edge = LEFT
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)
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points.next_to(group, DOWN, LARGE_BUFF)
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self.play(Write(title), ShowCreation(underline))
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self.dither()
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for point in points:
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self.play(Write(point))
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self.dither(3)
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class BrilliantPuzzle(PiCreatureScene):
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CONFIG = {
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"random_seed" : 2,
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@ -1332,24 +1366,31 @@ class BrilliantPuzzle(PiCreatureScene):
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test.move_to(0.75*student.get_center())
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tests.add(test)
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student.test = test
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for i, student in enumerate(students):
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student.right = students[(i+1)%len(students)]
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student.left = students[(i-1)%len(students)]
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arrows = VGroup()
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for s1, s2 in adjacent_pairs(self.students):
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arrow = Arrow(
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s1.get_center(), s2.get_center(),
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buff = LARGE_BUFF
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use_rectangular_stem = False,
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path_arc = np.pi/2,
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buff = 0.8
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)
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arrow.shift(-MED_SMALL_BUFF*arrow.get_vector())
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arrow.tip.shift(SMALL_BUFF*arrow.get_vector())
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arrow.tip.shift(-0.1*SMALL_BUFF*arrow.tip.get_center())
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# arrow.shift(-MED_SMALL_BUFF*arrow.get_vector())
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arrow.highlight(RED)
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arrow.pointing_right = True
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arrows.add(arrow)
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s1.right_arrow = arrow
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s2.left_arrow = arrow
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arrow.counterclockwise = True
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s1.arrow = arrow
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arrow.student = s1
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title = TextMobject("Puzzle from Brilliant")
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title.scale(0.75)
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title.to_corner(UP+LEFT)
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question = TextMobject("Expecte number of \\\\ circled students?")
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question = TextMobject("Expected number of \\\\ circled students?")
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question.to_corner(UP+RIGHT)
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self.remove(students)
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@ -1367,7 +1408,7 @@ class BrilliantPuzzle(PiCreatureScene):
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ApplyMethod, students,
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lambda m : (m.change, "conniving")
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))
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self.play(LaggedStart(GrowArrow, arrows))
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self.play(LaggedStart(ShowCreation, arrows))
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for x in range(2):
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self.swap_arrows_randomly(arrows)
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self.dither()
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@ -1401,12 +1442,18 @@ class BrilliantPuzzle(PiCreatureScene):
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def get_arrow_swap_anim(self, arrow):
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arrow.generate_target()
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arrow.target.rotate_in_place(np.pi)
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if arrow.counterclockwise:
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arrow.target.highlight(GREEN)
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if arrow.pointing_right:
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target_color = GREEN
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target_angle = np.pi - np.pi/4
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else:
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arrow.target.highlight(RED)
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arrow.counterclockwise = not arrow.counterclockwise
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target_color = RED
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target_angle = np.pi + np.pi/4
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arrow.target.highlight(target_color)
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arrow.target.rotate(
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target_angle,
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about_point = arrow.student.get_center()
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)
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arrow.pointing_right = not arrow.pointing_right
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return MoveToTarget(arrow, path_arc = np.pi)
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def swap_arrows_randomly(self, arrows, *added_anims):
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@ -1418,17 +1465,20 @@ class BrilliantPuzzle(PiCreatureScene):
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def circle_students(self):
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circles = VGroup()
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circled_students = list(self.students)
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for student in self.students:
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ra, la = student.right_arrow, student.left_arrow
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if ra.counterclockwise and not la.counterclockwise:
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circle = Circle(color = YELLOW)
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circle.scale_to_fit_height(1.2*student.get_height())
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circle.move_to(student)
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circles.add(circle)
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self.play(
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ShowCreation(circle),
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Indicate(VGroup(ra, la))
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)
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if student.arrow.pointing_right:
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to_remove = student.right
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else:
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to_remove = student.left
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if to_remove in circled_students:
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circled_students.remove(to_remove)
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for student in circled_students:
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circle = Circle(color = YELLOW)
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circle.scale_to_fit_height(1.2*student.get_height())
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circle.move_to(student)
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circles.add(circle)
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self.play(ShowCreation(circle))
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return circles
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class ScrollThroughBrilliantCourses(ExternallyAnimatedScene):
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@ -1474,7 +1524,89 @@ class Promotion(PiCreatureScene):
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self.play(FadeOut(url_rect))
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self.dither(3)
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class AddedPromoWords(Scene):
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def construct(self):
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words = TextMobject(
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"First", "$2^8$", "vistors get",
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"$(e^\\pi - \\pi)\\%$", "off"
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)
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words.scale_to_fit_width(2*SPACE_WIDTH - 1)
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words.to_edge(DOWN)
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words.highlight_by_tex("2^8", YELLOW)
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words.highlight_by_tex("pi", PINK)
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self.play(Write(words))
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self.dither()
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class PatreonThanks(PatreonEndScreen):
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CONFIG = {
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"specific_patrons" : [
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"Randall Hunt",
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"Burt Humburg",
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"CrypticSwarm",
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"Juan Benet",
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"David Kedmey",
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"Marcus Schiebold",
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"Ali Yahya",
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"Mayank M. Mehrotra",
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"Lukas Biewald",
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"Yana Chernobilsky",
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"Kaustuv DeBiswas",
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"Kathryn Schmiedicke",
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"Yu Jun",
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"Dave Nicponski",
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"Damion Kistler",
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"Jordan Scales",
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"Markus Persson",
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"Egor Gumenuk",
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"Yoni Nazarathy",
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"Ryan Atallah",
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"Joseph John Cox",
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"Luc Ritchie",
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"James Park",
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"Samantha D. Suplee",
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"Delton",
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"Thomas Tarler",
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"Jake Alzapiedi",
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"Jonathan Eppele",
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"Taro Yoshioka",
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"1stViewMaths",
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"Jacob Magnuson",
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"Mark Govea",
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"Dagan Harrington",
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"Clark Gaebel",
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"Eric Chow",
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"Mathias Jansson",
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"David Clark",
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"Michael Gardner",
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"Erik Sundell",
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"Awoo",
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"Dr. David G. Stork",
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"Tianyu Ge",
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"Ted Suzman",
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"Linh Tran",
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"Andrew Busey",
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"John Haley",
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"Ankalagon",
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"Eric Lavault",
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"Boris Veselinovich",
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"Julian Pulgarin",
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"Jeff Linse",
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"Cooper Jones",
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"Ryan Dahl",
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"Robert Teed",
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"Jason Hise",
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"Meshal Alshammari",
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"Bernd Sing",
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"Mustafa Mahdi",
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"Mathew Bramson",
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"Jerry Ling",
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"Shimin Kuang",
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"Rish Kundalia",
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"Achille Brighton",
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"Ripta Pasay",
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]
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}
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