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Added sound to mark when animation finishes
This commit is contained in:
Grant Sanderson
parent
3ff889e584
commit
3391e645d7
3 changed files with 139 additions and 23 deletions
138
eola/chapter7.py
138
eola/chapter7.py
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@ -1121,26 +1121,33 @@ class TwoDOneDMatrixMultiplication(Scene):
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y.highlight(Y_COLOR)
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class AssociationBetweenMatricesAndVectors(Scene):
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CONFIG = {
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"matrices" : [
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[[2, 7]],
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[[1, -2]]
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]
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}
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def construct(self):
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matrices_words = TextMobject("$1\\times 2$ matrices")
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matrices_words.highlight(BLUE)
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vectors_words = TextMobject("2d vectors")
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vectors_words.highlight(YELLOW)
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arrow = DoubleArrow(LEFT, RIGHT, color = WHITE)
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VMobject(
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Group(
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matrices_words, arrow, vectors_words
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).arrange_submobjects(buff = MED_BUFF)
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matrices = VMobject(Matrix([[2, 7]]), Matrix([[1, -2]]))
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vectors = VMobject(Matrix([2, 7]), Matrix([1, -2]))
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matrices = Group(*map(Matrix, self.matrices))
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vectors = Group(*map(Matrix, [m[0] for m in self.matrices]))
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for m in list(matrices) + list(vectors):
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x, y = m.get_entries()
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x.highlight(X_COLOR)
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y.highlight(Y_COLOR)
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matrices[0].next_to(matrices_words, UP, buff = MED_BUFF)
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matrices[1].next_to(matrices_words, DOWN, buff = MED_BUFF)
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vectors[0].next_to(vectors_words, UP, buff = MED_BUFF)
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vectors[1].next_to(vectors_words, DOWN, buff = MED_BUFF)
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matrices.words = matrices_words
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vectors.words = vectors_words
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for group in matrices, vectors:
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for m, direction in zip(group, [UP, DOWN]):
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m.next_to(group.words, direction, buff = MED_BUFF)
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self.play(*map(Write, [matrices_words, vectors_words]))
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self.play(ShowCreation(arrow))
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@ -1638,8 +1645,10 @@ class ScaleUpUHat(ProjectOntoUnitVectorNumberline) :
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v.coords.next_to(v.get_end(), UP+LEFT)
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self.play(Write(self.u_hat.coords))
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self.play(Transform(self.u_hat, new_u))
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self.play(Transform(self.u_hat.coords, new_u.coords))
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self.play(
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Transform(self.u_hat, new_u),
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Transform(self.u_hat.coords, new_u.coords)
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)
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self.dither()
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def show_matrix(self):
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@ -1673,17 +1682,16 @@ class ScaleUpUHat(ProjectOntoUnitVectorNumberline) :
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b.proj = get_vect_mob_projection(b, self.u_hat)
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b.proj_line = DashedLine(
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b.get_end(), b.proj.get_end(),
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dashed_segment_length = 0.75
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dashed_segment_length = 0.05
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)
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b.proj.label = TexMobject("u_%s"%char)
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b.proj.label.highlight(b.get_color())
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b.scaled_proj = b.proj.copy().scale(self.scalar)
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b.scaled_proj.label = Group(
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TexMobject(str(self.scalar)).highlight(b.get_color()),
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b.proj.label.copy()
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).arrange_submobjects(aligned_edge = DOWN)
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for v in b.proj, b.scaled_proj:
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v.label.next_to(v.get_end(), UP+LEFT)
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b.scaled_proj.label = TexMobject("3u_%s"%char)
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b.scaled_proj.label.highlight(b.get_color())
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for v, direction in zip([b.proj, b.scaled_proj], [UP, UP+LEFT]):
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v.label.add_background_rectangle()
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v.label.next_to(v.get_end(), direction)
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self.play(*map(ShowCreation, bases))
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for b in bases:
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@ -1705,11 +1713,102 @@ class ScaleUpUHat(ProjectOntoUnitVectorNumberline) :
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def transform_some_vector(self):
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words = TextMobject(
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"\\centering Project",
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"\\centering Project\\\\",
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"then scale"
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)
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project, then_scale = words.split()
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words.add_background_rectangle()
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words.move_to(self.matrix_words, aligned_edge = UP)
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v = Vector([3, -1], color = MAROON_B)
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proj = get_vect_mob_projection(v, self.u_hat)
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proj_line = DashedLine(
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v.get_end(), proj.get_end(),
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color = v.get_color()
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)
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mover = v.copy()
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self.play(ShowCreation(v))
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self.play(Transform(self.matrix_words, words))
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self.play(ShowCreation(proj_line))
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self.play(
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Transform(mover, proj),
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project.highlight, YELLOW
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)
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self.dither()
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self.play(
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mover.scale, self.scalar,
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then_scale.highlight, YELLOW
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)
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self.dither()
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class NoticeWhatHappenedHere(TeacherStudentsScene):
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def construct(self):
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self.teacher_says("""
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Notice what
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happened here
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""")
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self.change_student_modes(*["pondering"]*3)
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self.random_blink()
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class AbstractNumericAssociation(AssociationBetweenMatricesAndVectors):
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CONFIG = {
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"matrices" : [
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[["u_x", "u_y"]]
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]
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}
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class TwoDOneDTransformationSeparateSpace(Scene):
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def construct(self):
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x_rad = SPACE_WIDTH/2-0.5
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plane = NumberPlane(x_radius = x_rad)
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squish_plane = plane.copy().apply_function(
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lambda p : sum(p)*RIGHT
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)
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plane.to_edge(LEFT)
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squish_plane.scale_to_fit_width(2*x_rad)
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squish_plane.to_edge(RIGHT)
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number_line = NumberLine().stretch_to_fit_width(2*x_rad)
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number_line.to_edge(RIGHT)
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numbers = number_line.get_numbers(*range(-6, 8, 2))
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v_line = Line(UP, DOWN).scale(SPACE_HEIGHT)
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words = TextMobject("""
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Any time you have a
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2d-to-1d linear transform...
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""")
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words.add_background_rectangle()
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words.to_edge(UP)
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self.play(Write(words, run_time = 1))
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self.play(*map(ShowCreation, [
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plane, number_line, v_line
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])+[Animation(words)])
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self.play(Write(numbers, run_time = 1))
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self.play(
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Transform(plane, squish_plane),
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Animation(words),
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path_arc = -np.pi/4,
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run_time = 3
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)
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self.dither()
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class IsntThisBeautiful(TeacherStudentsScene):
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def construct(self):
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self.teacher.look(DOWN+LEFT)
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self.teacher_says(
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"Isn't this beautiful",
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pi_creature_target_mode = "surprised"
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)
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for student in self.get_students():
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self.play(student.change_mode, "happy")
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self.random_blink()
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@ -1718,11 +1817,6 @@ class ScaleUpUHat(ProjectOntoUnitVectorNumberline) :
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# get_proj_lines(self, dots, proj_dots)
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# get_proj_dots(self, dots)
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# get_dots(self, vectors)
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# get_vectors(self, num_vectors = 10, randomize = True)
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21
helpers.py
21
helpers.py
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@ -7,6 +7,7 @@ import random
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import inspect
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import string
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import re
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import os
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from scipy import linalg
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from constants import *
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@ -14,6 +15,26 @@ from constants import *
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CLOSED_THRESHOLD = 0.01
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STRAIGHT_PATH_THRESHOLD = 0.01
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def play_chord(*nums):
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commands = [
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"play",
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"-n",
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"-c1",
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"synth",
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] + [
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"sin %-"+str(num)
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for num in nums
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] + [
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"fade h 0.5 1 0.5"
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]
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try:
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os.system(" ".join(commands))
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except:
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pass
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def play_finish_sound():
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play_chord(12, 9, 5, 2)
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def get_smooth_handle_points(points):
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num_handles = len(points) - 1
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dim = points.shape[1]
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@ -350,7 +350,8 @@ class Scene(object):
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for frame in self.frames:
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process.stdin.write(frame.tostring())
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process.stdin.close()
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process.wait()
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process.wait()
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play_finish_sound()
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# To list possible args that subclasses have
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# Elements should always be a tuple
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