I wanted to turn the circle into an irregular shape by random scaling, as shown in Fig

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apply_complex_function HELP about manim HOT 3 CLOSED

guiwenfeng commented on September 13, 2024

apply_complex_function HELP

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Comments (3)

uwezi commented on September 13, 2024

I don't completely understand what happens here, but if you scale down the amplitude of your randomness it gets better. Also a parametric curve for your circle seems to be a better choice, since a circle object in Manim does not contain many points.

class Test(Scene):

    def construct(self):
        #circle = Circle()
        circle = ParametricFunction(
            lambda t: np.array([np.cos(t),np.sin(t),0]),
            t_range=[0,2*PI,0.2]
        )
        # circle.apply_complex_function(
        #     lambda z: z*2
        # )

        circle.apply_complex_function(
            lambda z: z*np.random.uniform(1.975, 2.025)
        )

        self.add(circle)

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guiwenfeng commented on September 13, 2024

Thanks @uwezi ，My purpose is to generate an irregular shape, and now I've found a way.

from manim import *
import random


class IrregularShapeDemo(Scene):
    stroke_color = TEAL
    fill_color = BLUE_E
    fill_opacity = 1
    height = 2

    def construct(self):
        plane = NumberPlane()

        blob = VMobject()
        blob.set_points_as_corners([
            (1 + 0.3 * random.random()) * p
            for p in compass_directions(12)
        ])
        blob.close_path()
        blob.set_fill(self.fill_color, self.fill_opacity)
        blob.set_stroke(self.stroke_color)
        blob.set(height=self.height)
        blob.make_smooth()
        blob.center().shift(UP+RIGHT)

        self.add(plane, blob)