MovingDots

点的变换

19KB

MovingDots.mp4

MovingDots

from manim import *

class MovingDots(Scene):
    def construct(self):
        d1,d2=Dot(color=BLUE),Dot(color=GREEN)
        dg=VGroup(d1,d2).arrange(RIGHT,buff=1)
        l1=Line(d1.get_center(),d2.get_center()).set_color(RED)
        x=ValueTracker(0)
        y=ValueTracker(0)
        d1.add_updater(lambda z: z.set_x(x.get_value()))
        d2.add_updater(lambda z: z.set_y(y.get_value()))
        l1.add_updater(lambda z: z.become(Line(d1.get_center(),d2.get_center())))
        self.add(d1,d2,l1)
        self.play(x.animate.set_value(5))
        self.play(y.animate.set_value(4))
        self.wait()