asteroid.py

from circleshape import *
from constants import *
import random

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
        angle = random.uniform(20, 51)
        velocity_1 = self.velocity.rotate(angle)
        velocity_2 = self.velocity.rotate(-angle)
        radius = self.radius - ASTEROID_MIN_RADIUS
        a_1 = Asteroid(self.position.x, self.position.y, radius)
        a_2 = Asteroid(self.position.x, self.position.y, radius)
        a_1.velocity = velocity_1 * 1.2
        a_2.velocity = velocity_2 * 1.2

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

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