[Three functions and some dots] Showing the plotting of functions and MoveAlongPath. #manim #animation #movealongpath #functions

20250213_movealong.py

# reaction to https://www.reddit.com/r/manim/comments/1iois3s/is_manim_worth_learning_for_math_visualization_or/
from manim import *

class justforfun(Scene):
    def construct(self):
        ax1 = Axes(
            x_range = [-3,3,1],
            y_range = [-1.5,+1.5,1],
            x_length = 10,
            y_length = 2,
            tips=False
        ).to_edge(UP).add_coordinates()
        ax2 = ax1.copy().next_to(ax1,DOWN)
        ax3 = ax1.copy().next_to(ax2,DOWN)
        def f(x):
            return 0 if x < -2 else -2-x if x < -1 else x if x < +1 else 2-x if x < +2 else 0
        def g(x):
            return np.exp(-x**2)
        def fg(x):
            return f(x)*g(x)
        plot1 = ax1.plot(f, use_smoothing=False, color=BLUE, stroke_width=2)
        plot2 = ax2.plot(g, use_smoothing=False, color=YELLOW, stroke_width=2)
        plot3 = ax3.plot(fg, use_smoothing=False, color=GREEN, stroke_width=2)
        self.add(ax1,ax2,ax3)
        self.add(plot1,plot2,plot3)
        dot1 = Dot(color=BLUE).move_to(plot1.get_start())
        dot2 = Dot(color=YELLOW).move_to(plot2.get_start())
        dot3 = Dot(color=GREEN).move_to(plot3.get_start())
        self.add(dot1,dot2,dot3)
        self.wait()
        self.play(
            MoveAlongPath(dot1,plot1),
            MoveAlongPath(dot2,plot2),
            MoveAlongPath(dot3,plot3),
            rate_func=rate_functions.linear,
            run_time=4
        )
        self.wait()

readme.md

ManimCE output as GIF