[different rate functions] How to use different rate functions in the same animation #manim #updater #valuetracker #rate_functions

20220916_ratefuncs.py

# @Benjamin Hackl and @kolibril13
# https://discord.com/channels/581738731934056449/1020428420498333696/1020431068236628001

from manim import *
class MeineSzene(Scene):
    def construct(self):
        line1 = Line(3*LEFT, 3*RIGHT).shift(UP).set_color(RED)
        line2 = Line(3*LEFT, 3*RIGHT).set_color(GREEN)

        d1 = Dot().move_to(line1.get_left())
        d2 = Dot().move_to(line2.get_left())

        label1 = Tex("smooth").next_to(line1, RIGHT)
        label2 = Tex("linear").next_to(line2, RIGHT)


        tr1=ValueTracker(-3)
        tr2=ValueTracker(-3)


        d1.add_updater(lambda z: z.set_x(tr1.get_value()))
        d2.add_updater(lambda z: z.set_x(tr2.get_value()))
        self.add(d1,d2)
        self.add(line1,line2,d1,d2,label1,label2 )

        self.play(tr1.animate(rate_func=smooth).set_value(3), tr2.animate(rate_func=linear).set_value(3))
        self.wait()