random astroids

models.py

 import arcade.key
-from random import randint
+from random import randint, random
 
 class Model:
     def __init__(self, world, x, y, angle):
@@ -51,9 +51,34 @@ class Gold(Model):
     def random_location(self):
         self.x = randint(0, self.world.width - 1)
         self.y = randint(0, self.world.height - 1)
+
+
+class Asteroid(Model):
+    def __init__(self, world, x, y, vx, vy):
+        super().__init__(world, x, y, 0)
+        self.vx = vx
+        self.vy = vy
+        self.angle = randint(0,359)
+
+    def random_direction(self):
+        self.vx = 5 * random()
+        self.vy = 5 * random()
         
+    def animate(self, delta):
+        if (self.x < 0) or (self.x > self.world.width):
+            self.vx = - self.vx
+        
+        if (self.y < 0) or (self.y > self.world.height):
+            self.vy = - self.vy
+        
+        self.x += self.vx
+        self.y += self.vy
+        self.angle += 3
+
         
 class World:
+    NUM_ASTEROID = 10
+    
     def __init__(self, width, height):
         self.width = width
         self.height = height
@@ -61,15 +86,29 @@ class World:
         self.ship = Ship(self, 100, 100)
         self.gold = Gold(self, 400, 400)
 
+        self.asteroids = []
+        for i in range(World.NUM_ASTEROID):
+            asteroid = Asteroid(self, 0, 0, 0, 0)
+            asteroid.random_direction()
+            self.asteroids.append(asteroid)
+
         self.score = 0
         
     def animate(self, delta):
         self.ship.animate(delta)
-
+        
         if self.ship.hit(self.gold, 10):
             self.gold.random_location()
             self.score += 1
 
+        for asteroid in self.asteroids:
+            asteroid.animate(delta)
+            if self.ship.hit(asteroid, 10):
+                self.score -= 1
+                asteroid.x = 0
+                asteroid.y = 0
+                asteroid.random_direction()
+
     def on_key_press(self, key, key_modifiers):
         if key == arcade.key.SPACE:
             self.ship.switch_direction()

space.py

@@ -31,15 +31,21 @@ class SpaceGameWindow(arcade.Window):
 
         self.ship_sprite = ModelSprite('images/ship.png',model=self.world.ship)
         self.gold_sprite = ModelSprite('images/gold.png',model=self.world.gold)
+
+        self.asteroid_sprites = []
+        for asteroid in self.world.asteroids:
+            self.asteroid_sprites.append(ModelSprite('images/ship.png',scale=0.5,model=asteroid))
         
 
     def on_draw(self):
         arcade.start_render()
         self.gold_sprite.draw()
         self.ship_sprite.draw()
+        for sprite in self.asteroid_sprites:
+            sprite.draw()
 
         arcade.draw_text(str(self.world.score),
-                         self.width - 30, self.height - 30,
+                         self.width - 60, self.height - 30,
                          arcade.color.WHITE, 20)