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Added a few base layer animation for end message of fourier

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This commit is contained in:
Grant Sanderson 2018-01-22 11:43:19 -08:00
parent c3cc3e1144
commit b9a4dd2e5f
1 changed files with 70 additions and 4 deletions
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74
active_projects/fourier.py
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@ -2177,7 +2177,7 @@ class FilterOutHighPitch(AddingPureFrequencies, ShowCommutativeDiagram):
self.fourier_graph = fourier_graph
self.spike_rect = spike_rect
def filter_out_high_pitch(self):
def filter_out_high_pitch(self):
fourier_graph = self.fourier_graph
spike_rect = self.spike_rect
frequency_axes = self.frequency_axes
@ -2188,14 +2188,14 @@ class FilterOutHighPitch(AddingPureFrequencies, ShowCommutativeDiagram):
return result
new_graph = frequency_axes.get_graph(
filtered_func, num_graph_points = 200
filtered_func, num_graph_points = 300
)
new_graph.highlight(RED)
self.play(spike_rect.stretch, 4)
self.play(spike_rect.stretch, 4, 0)
self.play(
Transform(fourier_graph, new_graph),
spike_rect.stretch, 0.01, {
spike_rect.stretch, 0.01, 1, {
"about_point" : frequency_axes.coords_to_point(0, 0)
},
run_time = 2
@ -2226,6 +2226,72 @@ class FilterOutHighPitch(AddingPureFrequencies, ShowCommutativeDiagram):
class CloseWithAPuzzle(TeacherStudentsScene):
def construct(self):
self.teacher_says("Close with a puzzle!", run_time = 1)
self.change_student_modes(*["hooray"]*3)
self.wait(3)
class PuzzleDescription(Scene):
def construct(self):
lines = VGroup(
TextMobject("Convex set", "$C$", "in $\\mathds{R}^3$"),
TextMobject("Boundary", "$B$", "$=$", "$\\partial C$"),
TextMobject("$D$", "$=\\{p+q | p, q \\in B\\}$"),
TextMobject("Prove that", "$D$", "is convex")
)
for line in lines:
line.highlight_by_tex_to_color_map({
"$C$" : BLUE_D,
"\\partial C" : BLUE_D,
"$B$" : BLUE_C,
"$D$" : YELLOW,
})
VGroup(lines[2][1][2], lines[2][1][6]).highlight(RED)
VGroup(lines[2][1][4], lines[2][1][8]).highlight(MAROON_B)
lines[2][1][10].highlight(BLUE_C)
lines.scale(1.25)
lines.arrange_submobjects(DOWN, buff = LARGE_BUFF, aligned_edge = LEFT)
lines.to_corner(UP+RIGHT)
for line in lines:
self.play(Write(line))
self.wait(2)
class SponsorScreenGrab(PiCreatureScene):
def construct(self):
morty = self.pi_creature
screen = ScreenRectangle(height = 5)
screen.to_corner(UP+LEFT)
screen.shift(MED_LARGE_BUFF*DOWN)
url = TextMobject("janestreet.com/3b1b")
url.next_to(screen, UP)
self.play(
morty.change, "raise_right_hand",
ShowCreation(screen)
)
self.play(Write(url))
self.wait(2)
for mode in "happy", "thinking", "pondering", "thinking":
self.play(morty.change, mode, screen)
self.wait(4)