added astroids and astroid field

asteroid.py

@@ -0,0 +1,16 @@
+import circleshape
+import pygame
+import constants
+
+class Asteroid(circleshape.CircleShape):
+    
+    containers = []
+
+    def __init__(self, x, y, radius):
+         super().__init__(x,y,radius)
+
+    def draw(self,screen):
+        pygame.draw.circle(screen,(255,255,255),self.position,self.radius,2)
+
+    def update(self, dt):
+        self.position += self.velocity * dt

asteroidfield.py

@@ -0,0 +1,51 @@
+import pygame
+import random
+from asteroid import Asteroid
+from constants import *
+
+
+class AsteroidField(pygame.sprite.Sprite):
+    edges = [
+        [
+            pygame.Vector2(1, 0),
+            lambda y: pygame.Vector2(-ASTEROID_MAX_RADIUS, y * SCREEN_HEIGHT),
+        ],
+        [
+            pygame.Vector2(-1, 0),
+            lambda y: pygame.Vector2(
+                SCREEN_WIDTH + ASTEROID_MAX_RADIUS, y * SCREEN_HEIGHT
+            ),
+        ],
+        [
+            pygame.Vector2(0, 1),
+            lambda x: pygame.Vector2(x * SCREEN_WIDTH, -ASTEROID_MAX_RADIUS),
+        ],
+        [
+            pygame.Vector2(0, -1),
+            lambda x: pygame.Vector2(
+                x * SCREEN_WIDTH, SCREEN_HEIGHT + ASTEROID_MAX_RADIUS
+            ),
+        ],
+    ]
+
+    def __init__(self):
+        pygame.sprite.Sprite.__init__(self, self.containers)
+        self.spawn_timer = 0.0
+
+    def spawn(self, radius, position, velocity):
+        asteroid = Asteroid(position.x, position.y, radius)
+        asteroid.velocity = velocity
+
+    def update(self, dt):
+        self.spawn_timer += dt
+        if self.spawn_timer > ASTEROID_SPAWN_RATE:
+            self.spawn_timer = 0
+
+            # spawn a new asteroid at a random edge
+            edge = random.choice(self.edges)
+            speed = random.randint(40, 100)
+            velocity = edge[0] * speed
+            velocity = velocity.rotate(random.randint(-30, 30))
+            position = edge[1](random.uniform(0, 1))
+            kind = random.randint(1, ASTEROID_KINDS)
+            self.spawn(ASTEROID_MIN_RADIUS * kind, position, velocity)

main.py

@@ -1,26 +1,46 @@
 import pygame
 from constants import *
 from player import Player
+from asteroidfield import AsteroidField
+from asteroid import Asteroid
 
 def main():
+
+    # Print basic starting info
     print("Starting asteroids!")
     print(f"Screen width: {SCREEN_WIDTH}")
     print(f"Screen height: {SCREEN_HEIGHT}")
+   
+    # Initialize game, screen, game-clock and delta time counter
     pygame.init()
     screen = pygame.display.set_mode((SCREEN_WIDTH, SCREEN_HEIGHT))
     clock = pygame.time.Clock()
     dt = 0
     
+    # Groups
     drawables = pygame.sprite.Group()
     updatables = pygame.sprite.Group()
+    asteroids = pygame.sprite.Group()
 
+    # Set the containers of the astroids
+    Asteroid.containers = (asteroids,drawables,updatables)
+
+    # Set the containers of the astroid_field
+    AsteroidField.containers = (updatables)
+    af = AsteroidField()
+
+    # Set the containers of player
     Player.containers = (drawables, updatables)
+    # Set the position of the player
     p1 = Player(SCREEN_WIDTH/2,SCREEN_HEIGHT/2)
     
     while True:
+        # if event is quit then kill the game
         for event in pygame.event.get():
             if event.type == pygame.QUIT:
                 return
+
+        # fill the screen with the void of space
         screen.fill((0, 0, 0))
         
         for drawable in drawables:

out.txt

@@ -0,0 +1,2 @@
+MESA: error: ZINK: failed to choose pdev
+glx: failed to create drisw screen