the game is gamin

asteroid.py

@@ -0,0 +1,31 @@
+import random
+import pygame
+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 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
+
+        new_angle = random.uniform(20,50)
+        new_velocity_1 = self.velocity.rotate(new_angle)
+        new_velocity_2 = self.velocity.rotate(-new_angle)
+
+        new_radius = self.radius - ASTEROID_MIN_RADIUS
+
+        new_asteroid_1 = Asteroid(self.position[0], self.position[1], new_radius)
+        new_asteroid_2 = Asteroid(self.position[0], self.position[1], new_radius)
+
+        new_asteroid_1.velocity = new_velocity_1 * 1.2
+        new_asteroid_2.velocity = new_velocity_2 * 1.2

asteroidfield.py

@@ -0,0 +1,52 @@
+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)
+

circleshape.py

@@ -0,0 +1,25 @@
+import pygame
+
+# Base class for game objects
+class CircleShape(pygame.sprite.Sprite):
+    def __init__(self, x, y, radius):
+        # we will be using this later
+        if hasattr(self, "containers"):
+            super().__init__(self.containers)
+        else:
+            super().__init__()
+
+        self.position = pygame.Vector2(x, y)
+        self.velocity = pygame.Vector2(0, 0)
+        self.radius = radius
+
+    def draw(self, screen):
+        # sub-classes must override
+        pass
+
+    def update(self, dt):
+        # sub-classes must override
+        pass
+
+    def colission(self, circle):
+        return self.position.distance_to(circle.position) <= (self.radius + circle.radius)

constants.py

@@ -1,6 +1,14 @@
 SCREEN_WIDTH = 1280
 SCREEN_HEIGHT = 720
 
+PLAYER_RADIUS = 20
+PLAYER_SPEED = 20
+PLAYER_TURN_SPEED = 300
+PLAYER_SHOT_SPEED = 500
+PLAYER_SHOOT_COOLDOWN = 0.3
+
+SHOT_RADIUS = 5
+
 ASTEROID_MIN_RADIUS = 20
 ASTEROID_KINDS = 3
 ASTEROID_SPAWN_RATE = 0.8  # seconds

main.py

@@ -1,8 +1,13 @@
 # this allows us to use code from
 # the open-source pygame library
 # throughout this file
+import sys
 import pygame
 from constants import *
+from player import *
+from asteroid import *
+from asteroidfield import *
+from shot import *
 
 def main():
     print("Starting Asteroids!")
@@ -13,13 +18,47 @@ def main():
     #set screen resolution
     screen = pygame.display.set_mode((SCREEN_WIDTH, SCREEN_HEIGHT))
 
+    clock = pygame.time.Clock()
+    dt = 0
+
+    #groups 
+    updatable = pygame.sprite.Group()
+    drawable = pygame.sprite.Group()
+    asteroids = pygame.sprite.Group()
+    shots = pygame.sprite.Group()
+
+    Player.containers = (updatable, drawable)
+    Asteroid.containers = (updatable, drawable, asteroids)
+    AsteroidField.containers = (updatable)
+    Shot.containers = (updatable, drawable, shots)
+
+    player = Player(SCREEN_WIDTH / 2, SCREEN_HEIGHT / 2)
+    asteroidfield = AsteroidField()
+
     while True:
         for event in pygame.event.get():
             if event.type == pygame.QUIT:
                  return
         
+        updatable.update(dt)
+
+        for a in asteroids:
+            if a.colission(player):
+                print("Game Over!")
+                sys.exit()
+            for s in shots:
+                if a.colission(s):
+                    a.split()
+                    s.kill()
+
         screen.fill((0,0,0))
+
+        for d in drawable:
+            d.draw(screen)
+
+
         pygame.display.flip()
+        dt = clock.tick(60) / 1000
 
 if __name__ == "__main__":
     main()

player.py

@@ -0,0 +1,57 @@
+import pygame
+from constants import PLAYER_RADIUS, PLAYER_TURN_SPEED, PLAYER_SPEED, PLAYER_SHOT_SPEED, PLAYER_SHOOT_COOLDOWN
+from circleshape import CircleShape
+from shot import Shot
+
+class Player(CircleShape):
+    def __init__(self, x, y):
+        super().__init__(x, y, PLAYER_RADIUS)
+        self.rotation = 0
+        self.shot_cooldown_counter = 0
+
+    def draw(self, screen):
+        pygame.draw.polygon(screen, "white", self.triangle(), 2)
+
+    def update(self, dt):
+        self.shot_cooldown_counter -= dt
+
+        keys = pygame.key.get_pressed()
+
+        if keys[pygame.K_a]:
+            self.rotate(-dt)
+
+        if keys[pygame.K_d]:
+            self.rotate(dt)
+
+        if keys[pygame.K_w]:
+            self.move(dt)
+
+        if keys[pygame.K_s]:
+            self.move(-dt)
+
+        if keys[pygame.K_SPACE]:
+            self.shoot()
+
+
+    def rotate(self, dt):
+        self.rotation += PLAYER_TURN_SPEED * dt
+
+    def move(self, dt):
+        forward = pygame.Vector2(0, 1).rotate(self.rotation)
+        self.position += forward * PLAYER_SPEED * dt
+
+    def shoot(self):
+        if self.shot_cooldown_counter > 0:
+            return 
+        shot = Shot(self.position[0], self.position[1])
+        shot.velocity = pygame.Vector2(0, 1).rotate(self.rotation) * PLAYER_SHOT_SPEED
+        self.shot_cooldown_counter = PLAYER_SHOOT_COOLDOWN
+
+
+    def triangle(self):
+        forward = pygame.Vector2(0, 1).rotate(self.rotation)
+        right = pygame.Vector2(0, 1).rotate(self.rotation + 90) * self.radius / 1.5
+        a = self.position + forward * self.radius
+        b = self.position - forward * self.radius - right
+        c = self.position - forward * self.radius + right
+        return [a, b, c]

shot.py

@@ -0,0 +1,14 @@
+import pygame
+from circleshape import CircleShape
+from constants import SHOT_RADIUS
+
+class Shot(CircleShape):
+    def __init__(self, x, y):
+        super().__init__(x, y, SHOT_RADIUS)
+        self.rotation = 0
+
+    def draw(self, screen):
+        pygame.draw.circle(screen, "white", self.position, self.radius, 2)
+
+    def update(self, dt):
+        self.position += self.velocity * dt