asteroid.py

import pygame
import random

from circleshape import CircleShape
from constants import ASTEROID_MIN_RADIUS


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

    def split(self):
        self.kill()
        if self.radius <= ASTEROID_MIN_RADIUS:
            return
        new_angle = random.uniform(20, 50)
        new_radius = self.radius - ASTEROID_MIN_RADIUS

        new_asteroid = Asteroid(self.position.x, self.position.y, new_radius)
        new_asteroid.velocity = self.velocity.rotate(new_angle)*1.2

        new_asteroid2 = Asteroid(self.position.x, self.position.y, new_radius)
        new_asteroid2.velocity = self.velocity.rotate(-new_angle)*1.2

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

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