manimの作法 その12

概要

manimの作法、調べてみた。
RubiksCube、使ってみた。

サンプルコード

from manimlib.imports import *

class RubiksCube(VGroup):
    CONFIG = {
        "colors": [
            "#FFD500",  # Yellow
            "#C41E3A",  # Orange
            "#009E60",  # Green
            "#FF5800",  # Red
            "#0051BA",  # Blue
            "#FFFFFF"   # White
        ],
    }
    def __init__(self, **kwargs):
        digest_config(self, kwargs)
        vectors = [OUT, RIGHT, UP, LEFT, DOWN, IN]
        faces = [self.create_face(color, vector) for color, vector in zip(self.colors, vectors)]
        VGroup.__init__(self, *it.chain(*faces), **kwargs)
        self.set_shade_in_3d(True)
    def create_face(self, color, vector):
        squares = VGroup(*[self.create_square(color) for x in range(9)])
        squares.arrange_in_grid(3, 3, buff = 0)
        squares.set_width(2)
        squares.move_to(OUT, OUT)
        squares.apply_matrix(z_to_vector(vector))
        return squares
    def create_square(self, color):
        square = Square(stroke_width = 3, stroke_color = BLACK, fill_color = color, fill_opacity = 1, side_length = 1, )
        square.flip()
        return square
    def get_face(self, vect):
        self.sort(lambda p: np.dot(p, vect))
        return self[-(12 + 9):]

class test(SpecialThreeDScene):
    def construct(self):
        cube = RubiksCube()
        cube.set_fill(opacity = 0.8)
        cube.set_stroke(width = 1)
        axes = self.get_axes()
        self.add(axes, cube)
        self.move_camera(phi = 70 * DEGREES, theta = -140 * DEGREES, )
        self.begin_ambient_camera_rotation(rate = 0.02)
        self.wait(2)
        self.play(Rotate(cube, TAU / 4, RIGHT, run_time = 3))
        self.wait(2)
        self.play(Rotate(cube, TAU / 4, UP, run_time = 3))
        self.wait(2)
        self.play(Rotate(cube, -TAU / 3, np.ones(3), run_time = 3))
        self.wait(2)

生成した動画

以上。