如何在tkinter python 3中让两个粒子发生碰撞？

import tkinter as tk
import random

window = tk.Tk()
canvas = tk.Canvas(window, width=500, height=500)
canvas.pack()

class Particle:
    def __init__(self, x, y, radius, color):
        self.x = x
        self.y = y
        self.radius = radius
        self.color = color
        self.dx = random.randint(-5, 5)  # 粒子在x轴上的速度
        self.dy = random.randint(-5, 5)  # 粒子在y轴上的速度

    def draw(self):
        canvas.create_oval(self.x - self.radius, self.y - self.radius,
                           self.x + self.radius, self.y + self.radius,
                           fill=self.color)

    def move(self):
        self.x += self.dx
        self.y += self.dy

        # 检查粒子是否碰到画布边界
        if self.x - self.radius <= 0 or self.x + self.radius >= 500:
            self.dx *= -1
        if self.y - self.radius <= 0 or self.y + self.radius >= 500:
            self.dy *= -1

    def collide(self, other):
        distance = ((self.x - other.x) ** 2 + (self.y - other.y) ** 2) ** 0.5
        if distance <= self.radius + other.radius:
            self.dx *= -1
            self.dy *= -1
            other.dx *= -1
            other.dy *= -1

particle1 = Particle(100, 100, 20, "red")
particle2 = Particle(400, 400, 30, "blue")

def animate():
    canvas.delete("all")
    particle1.draw()
    particle2.draw()
    particle1.move()
    particle2.move()
    particle1.collide(particle2)
    window.after(10, animate)

animate()
window.mainloop()