asteroid.py

import pygame
import random
from constants import *
from circleshape import CircleShape

class Asteroid(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
        split_angle = random.uniform(20, 50)
        split_top_vector = self.velocity.rotate(split_angle)
        split_bottom_vector = self.velocity.rotate(-split_angle)
        split_radius = self.radius - ASTEROID_MIN_RADIUS
        split_asteroid_top = Asteroid(*self.position, split_radius)
        split_asteroid_top.velocity = split_top_vector * 1.2
        split_asteroid_bottom = Asteroid(*self.position, split_radius)
        split_asteroid_bottom.velocity = split_bottom_vector * 1.2