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A few simple animations for Q&A round 2 video
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Grant Sanderson
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1 changed files with 232 additions and 0 deletions
232
old_projects/qa_round_two.py
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old_projects/qa_round_two.py
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#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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from helpers import *
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from mobject.tex_mobject import TexMobject
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from mobject import Mobject
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from mobject.image_mobject import ImageMobject
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from mobject.vectorized_mobject import *
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from animation.animation import Animation
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from animation.transform import *
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from animation.simple_animations import *
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from animation.playground import *
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from animation.continual_animation import *
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from topics.geometry import *
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from topics.characters import *
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from topics.functions import *
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from topics.fractals import *
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from topics.number_line import *
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from topics.combinatorics import *
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from topics.numerals import *
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from topics.three_dimensions import *
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from topics.objects import *
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from topics.probability import *
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from topics.complex_numbers import *
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from scene import Scene
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from scene.reconfigurable_scene import ReconfigurableScene
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from scene.zoomed_scene import *
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from camera import Camera
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from mobject.svg_mobject import *
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from mobject.tex_mobject import *
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from topics.graph_scene import *
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from old_projects.efvgt import get_confetti_animations
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class Test(Scene):
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def construct(self):
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pass
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class Announcements(PiCreatureScene):
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def construct(self):
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title = TextMobject("Announcements!")
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title.scale(1.5)
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title.to_edge(UP)
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title.shift(LEFT)
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underline = Line(LEFT, RIGHT)
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underline.scale_to_fit_width(1.2*title.get_width())
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underline.next_to(title, DOWN)
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announcements = VGroup(*[
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TextMobject("$\\cdot$ %s"%s)
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for s in [
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"Q\\&A Round 2",
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"The case against Net Neutrality?",
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]
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])
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announcements.arrange_submobjects(
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DOWN,
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buff = LARGE_BUFF,
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aligned_edge = LEFT,
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)
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announcements.next_to(underline, DOWN, LARGE_BUFF, aligned_edge = LEFT)
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announcements.gradient_highlight(GREEN, YELLOW)
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self.play(
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Write(title),
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LaggedStart(FadeIn, announcements),
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ShowCreation(underline),
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self.pi_creature.change, "hooray", underline,
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)
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self.play(self.pi_creature.change, "confused", announcements)
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self.dither(2)
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class PowersOfTwo(Scene):
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def construct(self):
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powers_of_2 = VGroup(*[
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TexMobject("2^{%d}"%n, "=", "{:,}".format(2**n))
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for n in range(20)
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])
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powers_of_2.to_edge(UP)
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max_height = 6
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center = MED_LARGE_BUFF*DOWN
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mob = Dot(color = BLUE)
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mob.move_to(center)
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vects = it.cycle(5*[UP] + 5*[RIGHT])
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curr_po2 = powers_of_2[0]
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for i, vect, po2 in zip(it.count(), vects, powers_of_2[1:]):
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if i == 10:
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rect = SurroundingRectangle(mob, color = GREEN)
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group = VGroup(mob, rect)
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two_to_ten = group.copy()
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group.generate_target()
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group.target.scale_to_fit_height(0.2)
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group.target[1].set_fill(BLUE, 1)
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self.play(ShowCreation(rect))
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self.play(MoveToTarget(group))
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self.remove(group)
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mob = rect
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self.add(mob)
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m1, m2 = mob.copy(), mob.copy()
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group = VGroup(m1, m2)
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group.arrange_submobjects(
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vect, buff = SMALL_BUFF
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)
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if group.get_height() > max_height:
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group.scale_to_fit_height(max_height)
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group.move_to(center)
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pa = np.pi/3
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self.play(
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Transform(curr_po2, po2),
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ReplacementTransform(mob, m1, path_arc = pa),
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ReplacementTransform(mob.copy(), m2, path_arc = pa),
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)
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mob = VGroup(*it.chain(m1, m2))
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#Show two_to_ten for comparrison
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self.play(
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mob.space_out_submobjects, 1.1,
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mob.to_edge, RIGHT
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)
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two_to_ten.to_edge(LEFT)
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lines = VGroup(*[
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Line(
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two_to_ten.get_corner(vect+RIGHT),
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mob[0].get_corner(vect+LEFT),
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)
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for vect in UP, DOWN
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])
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two_to_ten.save_state()
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two_to_ten.replace(mob[0])
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self.play(
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two_to_ten.restore,
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*map(ShowCreation, lines)
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)
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curr_po2_outline = curr_po2[-1].copy()
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curr_po2_outline.set_fill(opacity = 0)
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curr_po2_outline.set_stroke(width = 2)
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curr_po2_outline.gradient_highlight(
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YELLOW, RED, PINK, PURPLE, BLUE, GREEN
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)
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self.play(
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LaggedStart(
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FadeIn, curr_po2_outline,
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rate_func = lambda t : wiggle(t, 8),
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run_time = 2,
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lag_ratio = 0.75,
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),
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*get_confetti_animations(50)
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)
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class PiHoldingScreen(PiCreatureScene):
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def construct(self):
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morty = self.pi_creature
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screen = ScreenRectangle()
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screen.scale_to_fit_height(5.5)
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screen.to_edge(UP, buff = LARGE_BUFF)
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screen.to_edge(LEFT)
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words = VGroup(
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TextMobject("Ben Eater"),
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TextMobject("The Case Against Net Neutrality?"),
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)
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words.next_to(screen, UP, SMALL_BUFF)
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self.play(
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ShowCreation(screen),
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morty.change, "raise_right_hand", screen
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)
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self.dither(10)
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self.play(
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morty.change, "hooray", words[0],
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Write(words[0])
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)
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self.dither(10)
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self.play(
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morty.change, "pondering", words[1],
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Transform(words[0], words[1])
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)
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self.dither(10)
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class QuestionsLink(Scene):
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def construct(self):
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link = TextMobject("https://3b1b.co/questions")
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link.scale_to_fit_width(2*SPACE_WIDTH)
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link.to_edge(DOWN)
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self.play(Write(link))
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self.dither()
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class Thumbnail(Scene):
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def construct(self):
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equation = TexMobject("2^{19} = " + "{:,}".format(2**19))
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equation.scale_to_fit_width(SPACE_WIDTH)
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equation.to_edge(DOWN, buff = LARGE_BUFF)
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q_and_a = TextMobject("Q\\&A \\\\ Round 2")
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q_and_a.gradient_highlight(BLUE, YELLOW)
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q_and_a.scale_to_fit_width(SPACE_WIDTH)
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q_and_a.to_edge(UP, buff = LARGE_BUFF)
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eater = ImageMobject("eater", height = 3)
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eater.to_corner(UP+RIGHT, buff = 0)
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confetti_anims = get_confetti_animations(100)
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for anim in confetti_anims:
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anim.update(0.5)
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confetti = VGroup(*[a.mobject for a in confetti_anims])
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self.add(equation, q_and_a, eater)
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