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133 lines
3.7 KiB
Python
133 lines
3.7 KiB
Python
#!/usr/bin/env python
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from big_ol_pile_of_manim_imports import *
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# To watch one of these scenes, run the following:
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# python -m manim example_scenes.py SquareToCircle -pl
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#
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# Use the flat -l for a faster rendering at a lower
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# quality.
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# Use -s to skip to the end and just show the final frame
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# Use the -p to have the animation pop up once done.
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# Use -n <number> to skip ahead to the n'th animation of a scene.
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class OpeningManimExample(Scene):
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def construct(self):
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title = TextMobject("This is some \\LaTeX")
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basel = TexMobject(
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"\\sum_{n=1}^\\infty "
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"\\frac{1}{n^2} = \\frac{\\pi^2}{6}"
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)
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VGroup(title, basel).arrange_submobjects(DOWN)
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self.play(
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Write(title),
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FadeInFrom(basel, UP),
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)
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self.wait()
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transform_title = TextMobject("That was a transform")
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transform_title.to_corner(UP + LEFT)
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self.play(
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Transform(title, transform_title),
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LaggedStart(FadeOutAndShiftDown, basel),
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)
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self.wait()
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grid = NumberPlane()
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grid_title = TextMobject("This is a grid")
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grid_title.scale(1.5)
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grid_title.move_to(transform_title)
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self.add(grid, grid_title) # Make sure title is on top of grid
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self.play(
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FadeOut(title),
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FadeInFromDown(grid_title),
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Write(grid),
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)
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self.wait()
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grid_transform_title = TextMobject(
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"That was a non-linear function \\\\"
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"applied to the grid"
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)
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grid_transform_title.move_to(grid_title, UL)
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grid.prepare_for_nonlinear_transform()
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self.play(
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grid.apply_function,
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lambda p: p + np.array([
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np.sin(p[1]),
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np.sin(p[0]),
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0,
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]),
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run_time=3,
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)
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self.wait()
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self.play(
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Transform(grid_title, grid_transform_title)
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)
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self.wait()
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class SquareToCircle(Scene):
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def construct(self):
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circle = Circle()
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square = Square()
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square.flip(RIGHT)
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square.rotate(-3 * TAU / 8)
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circle.set_fill(PINK, opacity=0.5)
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self.play(ShowCreation(square))
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self.play(Transform(square, circle))
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self.play(FadeOut(square))
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class WarpSquare(Scene):
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def construct(self):
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square = Square()
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self.play(ApplyPointwiseFunction(
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lambda point: complex_to_R3(np.exp(R3_to_complex(point))),
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square
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))
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self.wait()
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class WriteStuff(Scene):
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def construct(self):
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example_text = TextMobject(
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"This is a some text",
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tex_to_color_map={"text": YELLOW}
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)
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example_tex = TexMobject(
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"\\sum_{k=1}^\\infty {1 \\over k^2} = {\\pi^2 \\over 6}",
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)
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group = VGroup(example_text, example_tex)
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group.arrange_submobjects(DOWN)
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group.set_width(FRAME_WIDTH - 2 * LARGE_BUFF)
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self.play(Write(example_text))
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self.play(Write(example_tex))
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self.wait()
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class UdatersExample(Scene):
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def construct(self):
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decimal = DecimalNumber(
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0,
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show_ellipsis=True,
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num_decimal_places=3,
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include_sign=True,
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)
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square = Square().to_edge(UP)
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decimal.add_updater(lambda d: d.next_to(square, RIGHT))
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decimal.add_updater(lambda d: d.set_value(square.get_center()[1]))
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self.add(square, decimal)
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self.play(
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square.to_edge, DOWN,
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rate_func=there_and_back,
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run_time=5,
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)
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self.wait()
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# See old_projects folder for many, many more
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