[42]Transform (2)

CyclicReplace

    def cyclic(self):
        tri = Triangle().to_edge(LEFT, buff=0.5)
        square = Square()
        circle = Circle().to_edge(RIGHT, buff=0.5)
        group = VGroup(tri, square, circle)

        self.add(group)
        self.wait()
        self.play(CyclicReplace(tri, square, circle), run_time=4)
        self.wait()

 

 

 

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ScaleInPlace

     def scale(self):
        tri = Triangle().to_edge(LEFT, buff=1)
        square = Square()
        circle = Circle().to_edge(RIGHT, buff=1)
        group = VGroup(tri, square, circle)

        self.add(group)
        self.wait()
        self.play(ScaleInPlace(group, 0.3), run_time=3) # 0.3
        self.play(ScaleInPlace(group, 5), run_time=3)  # 1.5 = 0.3 * 5
        self.play(ScaleInPlace(group, 1/1.5), run_time=3) # 1 = 1.5 * 1/1.5
        self.wait()     

 

 

 

---

FadeToColor 

    def fade_to_color(self):
        tri = Triangle(fill_opacity=1).to_edge(LEFT, buff=1)
        square = Square(fill_opacity=1)
        circle = Circle(fill_opacity=1).to_edge(RIGHT, buff=1)
        group = VGroup(tri, square, circle)

        self.add(group)
        self.wait()
        self.play(FadeToColor(group, RED))
        self.play(FadeToColor(group, GREEN))
        self.play(FadeToColor(group, BLUE))
        self.play(FadeToColor(group, YELLOW))
        self.play(FadeToColor(group, PINK))
        self.wait()

 

 

 

---

Restore 

 

    def restore(self):
        circle = Circle(fill_opacity=1, radius=0.3).to_edge(LEFT, buff=2)
        circle.save_state()
        self.add(circle)
        self.wait()

        for n, y in zip(np.arange(3,9), np.linspace(3,-3,6)):
            obj = RegularPolygon(n, color=RED).move_to(np.array([5,y,0]))
            self.play(ReplacementTransform(circle, obj))

        self.play(Restore(circle))

        self.wait()  

 

 

 

---

MoveToTarget

     def move_to_target(self):
        arrow = Arrow(LEFT, RIGHT, stroke_width=7, color=RED).to_edge(LEFT, buff=0.5)
        circle = Circle(stroke_color=WHITE, fill_opacity=1, color=BLUE).to_edge(RIGHT, buff=1)

        self.add(circle, arrow)

        target = arrow.generate_target()
        target.move_to(circle.get_center(), aligned_edge=RIGHT).set_length(target.get_length()-0.5)

        self.play(Rotate(circle,70 * DEGREES, axis=UP))
        self.play(MoveToTarget(arrow), rate_func=running_start, run_time=2)
        self.wait()