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https://github.com/3b1b/manim.git
synced 2025-08-02 02:35:22 +08:00
wrote quiz scene
This commit is contained in:
Ben Hambrecht
@ -1,9 +1,11 @@
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from big_ol_pile_of_manim_imports import *
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from old_projects.eoc.chapter8 import *
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from active_projects.eop.histograms import *
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from active_projects.eop.independence import *
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import scipy.special
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COIN_RADIUS = 0.18
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COIN_THICKNESS = 0.4 * COIN_RADIUS
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COIN_FORESHORTENING = 0.5
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@ -17,6 +19,18 @@ GRADE_COLOR_2 = COLOR_TAILS = BLUE
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TALLY_BACKGROUND_WIDTH = 1.0
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def get_example_quiz():
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quiz = get_quiz(
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"Define ``Brachistochrone'' ",
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"Define ``Tautochrone'' ",
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"Define ``Cycloid'' ",
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)
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rect = SurroundingRectangle(quiz, buff = 0)
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rect.set_fill(color = BLACK, opacity = 1)
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rect.set_stroke(width = 0)
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quiz.add_to_back(rect)
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return quiz
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def binary(i):
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# returns an array of 0s and 1s
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if i == 0:
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@ -140,7 +154,7 @@ class CoinFlippingPiCreatureScene(Scene):
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def construct(self):
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randy = CoinFlippingPiCreature()
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randy = CoinFlippingPiCreature(color = MAROON_E)
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self.add(randy)
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self.play(FlipCoin(randy, run_time = 3))
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@ -2380,5 +2394,190 @@ class EntireBrickWall(Scene):
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class QuizResult(Scene):
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def construct(self):
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highlight_color = YELLOW
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nb_students_x = 5
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nb_students_y = 3
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spacing_students_x = 2.0
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spacing_students_y = 2.2
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all_students = VGroup()
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student_points = []
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grades = []
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grades_count = []
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hist_y_values = np.zeros(4)
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for i in range(nb_students_x):
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for j in range(nb_students_y):
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x = i * spacing_students_x
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y = j * spacing_students_y
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pi = PiCreature().scale(0.3)
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pi.move_to([x,y,0])
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all_students.add(pi)
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q1 = np.random.choice([True, False])
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q2 = np.random.choice([True, False])
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q3 = np.random.choice([True, False])
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student_points.append([q1, q2, q3])
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grade = q1*1+q2*1+q3*1
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grades.append(grade)
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hist_y_values[grade] += 1
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# How many times has this grade already occured?
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grade_count = grades.count(grade)
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grades_count.append(grade_count)
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all_students.move_to(ORIGIN)
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self.add(all_students)
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all_quizzes = VGroup()
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quiz = get_example_quiz().scale(0.2)
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for pi in all_students:
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quiz_copy = quiz.copy()
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quiz_copy.next_to(pi, UP)
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all_quizzes.add(quiz_copy)
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master_quiz = get_example_quiz()
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self.play(ShowCreation(master_quiz))
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self.play(Transform(master_quiz, all_quizzes[0]))
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self.play(LaggedStart(FadeIn,all_quizzes))
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grades_mob = VGroup()
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for (pi, quiz, grade) in zip(all_students, all_quizzes, grades):
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grade_mob = TexMobject(str(grade) + "/3")
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grade_mob.move_to(quiz)
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grades_mob.add(grade_mob)
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self.remove(master_quiz)
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self.play(
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FadeOut(all_quizzes),
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FadeIn(grades_mob)
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)
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# self.play(
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# all_students[2:].fade, 0.8,
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# grades_mob[2:].fade, 0.8
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# )
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students_points_mob = VGroup()
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for (pi, quiz, points) in zip(all_students, all_quizzes, student_points):
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slot = get_slot_group(points, include_qs = False)
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slot.scale(0.5).move_to(quiz)
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students_points_mob.add(slot)
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self.play(
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#all_students.fade, 0,
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FadeOut(grades_mob),
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FadeIn(students_points_mob)
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)
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anims = []
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anchor_point = 3 * DOWN + 1 * LEFT
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for (pi, grade, grades_count) in zip(all_students, grades, grades_count):
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anims.append(pi.move_to)
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anims.append(anchor_point + grade * RIGHT + grades_count * UP)
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anims.append(FadeOut(students_points_mob))
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self.play(*anims)
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grade_labels = VGroup()
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for i in range(4):
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grade_label = Integer(i, color = highlight_color)
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grade_label.move_to(i * RIGHT)
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grade_labels.add(grade_label)
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grade_labels.next_to(all_students, DOWN)
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out_of_label = TextMobject("out of 3", color = highlight_color)
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out_of_label.next_to(grade_labels, RIGHT, buff = MED_LARGE_BUFF)
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grade_labels.add(out_of_label)
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self.play(Write(grade_labels))
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grade_hist = Histogram(
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np.ones(4),
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hist_y_values,
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mode = "widths",
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x_labels = "none",
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y_label_position = "center",
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bar_stroke_width = 0,
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outline_stroke_width = 5
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)
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grade_hist.move_to(all_students)
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self.play(FadeIn(grade_hist))
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nb_students_label = TextMobject("\# of students", color = highlight_color)
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nb_students_label.move_to(3 * LEFT + 2 * UP)
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arrows = VGroup(*[
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Arrow(nb_students_label, grade_hist.bars[i].get_center(),
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color = highlight_color)
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for i in range(4)
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])
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self.play(Write(nb_students_label), LaggedStart(ShowCreation,arrows))
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percentage_label = TextMobject("\% of students", color = highlight_color)
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percentage_label.move_to(nb_students_label)
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percentages = hist_y_values / (nb_students_x * nb_students_y) * 100
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anims = []
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for (label, percentage) in zip(grade_hist.y_labels_group, percentages):
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new_label = DecimalNumber(percentage,
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num_decimal_points = 1,
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unit = "\%",
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color = highlight_color
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)
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new_label.move_to(label)
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anims.append(Transform(label, new_label))
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anims.append(ReplacementTransform(nb_students_label, percentage_label))
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self.play(*anims)
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self.remove(all_quizzes)
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# put small copy of class in corner
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for (i,pi) in enumerate(all_students):
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x = i % 5
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y = i / 5
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pi.move_to(x * RIGHT + y * UP)
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all_students.scale(0.8)
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all_students.to_corner(DOWN + LEFT)
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self.play(FadeIn(all_students))
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prob_label = TextMobject("probability", color = highlight_color)
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prob_label.move_to(percentage_label)
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self.play(
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all_students[8].set_color, MAROON_E,
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all_students[:8].fade, 0.6,
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all_students[9:].fade, 0.6,
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ReplacementTransform(percentage_label, prob_label)
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)
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self.play(
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FadeOut(prob_label),
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FadeOut(arrows)
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)
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for i in range(1):
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self.play(
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FlashThroughHistogram(
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grade_hist,
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direction = "vertical",
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mode = "random",
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run_time = 5
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)
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)
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