[x/y lines to point on curve animated] How to animate .get_lines_to_point() #manim #valuetracker #animate #plot #get_lines_to_point

20220918_linestopoint.py

# https://discord.com/channels/581738731934056449/1020966805923188736/1020992408529416254

from manim import *

class axes(Scene):
    def construct(self):
        plane = NumberPlane(background_line_style={"stroke_opacity": 0.5})
        self.play(Create(plane))
        def f(x):
            return x**2
        splot = plane.plot(f)
        self.play(Create(splot))
        t = ValueTracker(0)
        point = Dot()
        point.add_updater(lambda x: x.move_to(plane.c2p(t.get_value(), f(t.get_value()))))
        lines = plane.get_lines_to_point(plane.c2p(t.get_value(), f(t.get_value())))
        lines.add_updater(lambda mobj: mobj.become(plane.get_lines_to_point(plane.c2p(t.get_value(), f(t.get_value())))))
        self.play(Create(point))
        self.play(Create(lines))
        self.play(t.animate.set_value(2))
        self.play(t.animate.set_value(-2))
        self.wait()      

readme.md

https://discord.com/channels/581738731934056449/1020966805923188736/1020992408529416254