[La Linea] Animation of a diamond breaking a sine wave. #manim #union #boolean

20250823_possible.py

from manim import *
class possible2(Scene):
    def construct(self):
        phase = ValueTracker(0)
        def bottom():
            return VMobject().add_points_as_corners(
                [
                    *[[x,0.5*np.sin(x-phase.get_value()),0] for x in np.linspace(-8,8,1000)],
                    [8,-8,0],[-8,-8,0],[-8,0,0]
                ]
            ).reverse_direction()

        object = Square().rotate(45*DEGREES).move_to([0,-3,0])

        wave = always_redraw(lambda:
            Union(
                bottom(),
                object.move_to([0,-3+0.5*phase.get_value(),0])
            ).set_stroke(width=3,color=WHITE).set_fill(opacity=0)
        )
        self.add(wave)
        self.play(
            phase.animate.set_value(4*PI), run_time=4, rate_func=rate_functions.linear
        )
        self.wait()
        
class possible3(Scene):
    def construct(self):
        phase = ValueTracker(0)
        def bottom():
            return VMobject().add_points_as_corners(
                [
                    *[[x,0.5*np.sin(x-phase.get_value()),0] for x in np.linspace(-8,8,1000)],
                    [8,-8,0],[-8,-8,0],[-8,0,0]
                ]
            ).reverse_direction()

        object = Square(stroke_width=0,fill_opacity=0).set_z_index(-10).rotate(45*DEGREES).move_to([0,-3,0])
        self.add(object)

        wave = always_redraw(lambda:
            Union(
                bottom(),
                object
            ).set_stroke(width=3,color=WHITE).set_fill(opacity=0)
        )
        self.add(wave)
        path = Arc(radius=4,start_angle=0,angle=PI)
        self.play(
            MoveAlongPath(object,path),
            phase.animate.set_value(4*PI), run_time=4, rate_func=rate_functions.linear
        )
        self.wait()
        
class possible4(Scene):
    def construct(self):
        phase = ValueTracker(0)
        def bottom():
            return VMobject().add_points_as_corners(
                [
                    *[[x,0.5*np.sin(x-phase.get_value()),0] for x in np.linspace(-8,8,1000)],
                    [8,-8,0],[-8,-8,0],[-8,0,0]
                ]
            ).reverse_direction()

        object = Square(stroke_width=0,fill_opacity=0).set_z_index(-10).rotate(45*DEGREES).move_to([0,-3,0])
        self.add(object)

        wave = always_redraw(lambda:
            Union(
                bottom(),
                object
            ).set_stroke(width=3,color=WHITE).set_fill(opacity=0)
        )
        self.add(wave)
        path = FunctionGraph(
            lambda x: 3-0.5*x**2,
            x_range=[-4,4,0.1]
        ).reverse_direction()
        self.play(
            MoveAlongPath(object,path),
            phase.animate.set_value(4*PI), run_time=4, rate_func=rate_functions.linear
        )
        self.wait()
        

readme.md

Answer to the question by IFNAV on reddit if a certain animation was possible in Manim https://www.reddit.com/r/manim/comments/1mxjr77/is_it_possible_with_manim/

possible2.mp4

possible3.mp4

possible4.mp4