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3eedfa7 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 | #!/usr/bin/env python
from manim import *
# To watch one of these scenes, run the following:
# python --quality m manim -p example_scenes.py SquareToCircle
#
# Use the flag --quality l for a faster rendering at a lower quality.
# Use -s to skip to the end and just save the final frame
# Use the -p to have preview of the animation (or image, if -s was
# used) pop up once done.
# Use -n <number> to skip ahead to the nth animation of a scene.
# Use -r <number> to specify a resolution (for example, -r 1920,1080
# for a 1920x1080 video)
class OpeningManim(Scene):
def construct(self):
title = Tex(r"This is some \LaTeX")
basel = MathTex(r"\sum_{n=1}^\infty \frac{1}{n^2} = \frac{\pi^2}{6}")
VGroup(title, basel).arrange(DOWN)
self.play(
Write(title),
FadeIn(basel, shift=DOWN),
)
self.wait()
transform_title = Tex("That was a transform")
transform_title.to_corner(UP + LEFT)
self.play(
Transform(title, transform_title),
LaggedStart(*(FadeOut(obj, shift=DOWN) for obj in basel)),
)
self.wait()
grid = NumberPlane()
grid_title = Tex("This is a grid", font_size=72)
grid_title.move_to(transform_title)
self.add(grid, grid_title) # Make sure title is on top of grid
self.play(
FadeOut(title),
FadeIn(grid_title, shift=UP),
Create(grid, run_time=3, lag_ratio=0.1),
)
self.wait()
grid_transform_title = Tex(
r"That was a non-linear function \\ applied to the grid",
)
grid_transform_title.move_to(grid_title, UL)
grid.prepare_for_nonlinear_transform()
self.play(
grid.animate.apply_function(
lambda p: p
+ np.array(
[
np.sin(p[1]),
np.sin(p[0]),
0,
],
),
),
run_time=3,
)
self.wait()
self.play(Transform(grid_title, grid_transform_title))
self.wait()
class SquareToCircle(Scene):
def construct(self):
circle = Circle()
square = Square()
square.flip(RIGHT)
square.rotate(-3 * TAU / 8)
circle.set_fill(PINK, opacity=0.5)
self.play(Create(square))
self.play(Transform(square, circle))
self.play(FadeOut(square))
class WarpSquare(Scene):
def construct(self):
square = Square()
self.play(
ApplyPointwiseFunction(
lambda point: complex_to_R3(np.exp(R3_to_complex(point))),
square,
),
)
self.wait()
class WriteStuff(Scene):
def construct(self):
example_text = Tex("This is a some text", tex_to_color_map={"text": YELLOW})
example_tex = MathTex(
"\\sum_{k=1}^\\infty {1 \\over k^2} = {\\pi^2 \\over 6}",
)
group = VGroup(example_text, example_tex)
group.arrange(DOWN)
group.width = config["frame_width"] - 2 * LARGE_BUFF
self.play(Write(example_text))
self.play(Write(example_tex))
self.wait()
class UpdatersExample(Scene):
def construct(self):
decimal = DecimalNumber(
0,
show_ellipsis=True,
num_decimal_places=3,
include_sign=True,
)
square = Square().to_edge(UP)
decimal.add_updater(lambda d: d.next_to(square, RIGHT))
decimal.add_updater(lambda d: d.set_value(square.get_center()[1]))
self.add(square, decimal)
self.play(
square.animate.to_edge(DOWN),
rate_func=there_and_back,
run_time=5,
)
self.wait()
class SpiralInExample(Scene):
def construct(self):
logo_green = "#81b29a"
logo_blue = "#454866"
logo_red = "#e07a5f"
font_color = "#ece6e2"
pi = MathTex(r"\pi").scale(7).set_color(font_color)
pi.shift(2.25 * LEFT + 1.5 * UP)
circle = Circle(color=logo_green, fill_opacity=0.7, stroke_width=0).shift(LEFT)
square = Square(color=logo_blue, fill_opacity=0.8, stroke_width=0).shift(UP)
triangle = Triangle(color=logo_red, fill_opacity=0.9, stroke_width=0).shift(
RIGHT
)
pentagon = Polygon(
*[
[np.cos(2 * np.pi / 5 * i), np.sin(2 * np.pi / 5 * i), 0]
for i in range(5)
],
color=PURPLE_B,
fill_opacity=1,
stroke_width=0,
).shift(UP + 2 * RIGHT)
shapes = VGroup(triangle, square, circle, pentagon, pi)
self.play(SpiralIn(shapes, fade_in_fraction=0.9))
self.wait()
self.play(FadeOut(shapes))
Triangle.set_default(stroke_width=20)
class LineJoints(Scene):
def construct(self):
t1 = Triangle()
t2 = Triangle(joint_type=LineJointType.ROUND)
t3 = Triangle(joint_type=LineJointType.BEVEL)
grp = VGroup(t1, t2, t3).arrange(RIGHT)
grp.set(width=config.frame_width - 1)
self.add(grp)
# See many more examples at https://docs.manim.community/en/stable/examples.html
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