[GlowDot] A glowing Dot() object. #manim #dot #glow #neon

20250613_glowdot.py

# after DIscord user Maxime
# https://discord.com/channels/581738731934056449/976376734935048223/1383208229760143532
class GlowDot(VMobject):
    def __init__(self, point=ORIGIN, r_min=0.05, r_max=0.15, color=YELLOW, n=20, opacity_mult=1.0, **kwargs):
        super().__init__(fill_color=color, fill_opacity=1, stroke_width=0, **kwargs)
        for a in np.linspace(0, 1, n):
            self.add(
                Dot(point, radius=interpolate(r_min, r_max, a))
            )
        self.set_fill(color, opacity=opacity_mult / n)

class testGlow(Scene):
    def construct(self):
        dots = VGroup(
            GlowDot(
                point=[np.random.uniform(-6,6),np.random.uniform(-3.5,3.5),0],
                r_min=np.random.normal(0.05,0.18),
                r_max=np.random.normal(0.2,0.3),
                color=np.random.choice([RED,GREEN,BLUE,PURE_RED,PURE_GREEN,PURE_BLUE,YELLOW,ORANGE,TEAL,PURPLE]),
            )
            for _ in range(100)
        )
        self.play(Create(dots))
        self.wait()

readme.md