manim 0.8.0 for nix

README.md

First, clone this gist.

Then run nix-shell -A shell -Q --pure

Finally, inside the Nix shell, run manim render -p -ql example.py OpeningManim && reset.

The && reset part is because for some reason the shell gets broken after you run that command. I suspect it would not happen with previewing (-p) disabled.

example.py

from manim import *

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")
        grid_title.scale(1.5)
        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()

shell.nix

rec {
  nixpkgs = fetchTarball {
    url = "https://github.com/taktoa/nixpkgs/archive/manim.tar.gz";
    # rev is be99eb8b781c48d84291673c515da68c066f2e34
    sha256 = "0xrksidk6v1as9x0qncrbg379cd1z5barnvclpscnhmarbb0j9h5";
  };
  pkgs = import nixpkgs { config = {}; overlays = []; };

  fakeBrowser = pkgs.writeScriptBin "x-www-browser" ''
    ${pkgs.mpv}/bin/mpv "$@"
  '';

  shell = pkgs.mkShell {
    buildInputs = [
      pkgs.busybox
      pkgs.manim
      pkgs.sox
      pkgs.ffmpeg
      pkgs.texlive.combined.scheme-full
      fakeBrowser
    ];
  };
}