Universe-/CIRCULAR MOTION at main · physisst/Universe- · GitHub

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%%manim -v WARNING -r 1080,1920 -pqh  circular_motion3
from manim import*
class circular_motion3(ThreeDScene):
    def construct(self):
      self.set_camera_orientation(
            phi=0 * DEGREES,
            theta=-90* DEGREES,
            distance=12,
            zoom=1)
      # ------------------SET UP  ------------------
      theta = ValueTracker(0)
      r=1.5
      axes1 = ThreeDAxes(x_range=(-2, 2, 1),z_range=(-2, 2, 1),y_range=(-2, 2, 1),x_length=12,y_length=12,z_length=12,axis_config={"include_ticks": False,"include_tip": False})
      circle = ParametricFunction(lambda u: axes1.c2p(r*np.cos(u),r*np.sin(u)), t_range=[0, 2*PI], color=BLUE)
      dot1 = always_redraw(lambda: Dot(point=axes1.c2p(r*np.cos(theta.get_value()),r* np.sin(theta.get_value())),color=RED))
      arrow1 =always_redraw(lambda: Arrow(start=axes1.c2p(0,0), end=dot1.get_center(), color=GREEN ,buff=0))
      group1=VGroup(circle,dot1,axes1,arrow1)
      self.add(group1)
      self.play(theta.animate.set_value(2*PI), run_time=4,rate_func=smooth)
      self.play(theta.animate.set_value(2*PI+PI/4), run_time=4,rate_func=smooth)
        # ------------------COMPONENTS STATIC ARROWS  ------------------
      alpha=2*PI+PI/4
      arrow2 = Arrow(
       start=axes1.c2p(r*np.cos(alpha), 0),
       end=axes1.c2p(r*np.cos(alpha), r*np.sin(alpha)),
       color=YELLOW,
       buff=0)
      arrow3 = Arrow(
        start=axes1.c2p(0, 0),
        end=axes1.c2p(r*np.cos(alpha), 0),
        color=RED,
        buff=0)
      vec_gr=VGroup(arrow2,arrow3)
      self.play(Create(vec_gr),run_time=2)
      self.wait(2)
        # ------------------COMPONENTS MOVING ARROWS  ------------------
      arrow2.add_updater(
            lambda a: a.put_start_and_end_on(axes1.c2p(0, 0,0),axes1.c2p(r*np.cos(theta.get_value()),0,0)))
      arrow3.add_updater(
            lambda a: a.put_start_and_end_on(
                axes1.c2p(r*np.cos(theta.get_value()),0),axes1.c2p(r*np.cos(theta.get_value()),r*np.sin(theta.get_value())
                )))
      self.play(
            theta.animate.set_value(alpha + 2*PI),
            run_time=4,
            rate_func=linear)
        # ------------------ FREEZE AGAIN (OPTIONAL) ------------------
      arrow1.clear_updaters()
      arrow2.clear_updaters()
      self.wait(2)