asteroid.py

import pygame
import circleshape
import random

from constants import ASTEROID_MIN_RADIUS

class Asteroid(circleshape.CircleShape):
    def __init__(self, x, y, radius):
        super().__init__(x, y, radius)

    def draw(self, screen):
        pygame.draw.circle(screen, "white", self.position, self.radius, 2) 

    def update(self, dt):
        self.position += self.velocity * dt
        
    def split(self):
        self.kill()

        if self.radius <= ASTEROID_MIN_RADIUS:
            return

        random_angle = random.uniform(20, 50)
        vector1 = self.velocity.rotate(-random_angle) * 1.2
        vector2 = self.velocity.rotate(random_angle) * 1.2
        new_radius = self.radius - ASTEROID_MIN_RADIUS

        asteroid1 = Asteroid(self.position.x, self.position.y, new_radius)
        asteroid1.velocity = vector1
        asteroid2 = Asteroid(self.position.x, self.position.y, new_radius)
        asteroid2.velocity = vector2