Adding in bullets

constants.py

@@ -4,6 +4,9 @@ SCREEN_HEIGHT = 720
 PLAYER_RADIUS = 20
 PLAYER_TURN_SPEED = 300
 PLAYER_SPEED = 200
+PLAYER_SHOOT_SPEED = 500
+PLAYER_SHOOT_COOLDOWN = 0.3
+SHOT_RADIUS = 5
 
 ASTEROID_MIN_RADIUS = 20
 ASTEROID_KINDS = 3

main.py

@@ -6,6 +6,7 @@ from constants import SCREEN_HEIGHT, SCREEN_WIDTH
 from player import Player
 from asteroid import Asteroid
 from asteroidfield import AsteroidField
+from shot import Shot
 
 def main():
     pygame.init()
@@ -16,9 +17,11 @@ def main():
     asteroids = pygame.sprite.Group()
     updatable = pygame.sprite.Group()
     drawable = pygame.sprite.Group()
+    shots = pygame.sprite.Group()
 
     Asteroid.containers = (asteroids, updatable, drawable)
     AsteroidField.containers = updatable
+    Shot.containers = (shots, updatable, drawable)
     asteroid_field = AsteroidField()
 
     Player.containers = (updatable, drawable)

player.py

@@ -1,11 +1,13 @@
 import pygame
 from circleshape import CircleShape
-from constants import PLAYER_RADIUS, PLAYER_TURN_SPEED, PLAYER_SPEED
+from shot import Shot
+from constants import PLAYER_RADIUS, PLAYER_TURN_SPEED, PLAYER_SPEED, PLAYER_SHOOT_SPEED, PLAYER_SHOOT_COOLDOWN
 
 class Player(CircleShape):
     def __init__(self, x, y):
         super().__init__(x, y, PLAYER_RADIUS)
         self.rotation = 0
+        self.timer = 0
 
     def rotate(self, dt):
         self.rotation += PLAYER_TURN_SPEED * dt
@@ -25,6 +27,16 @@ class Player(CircleShape):
             self.move(dt)
         if keys[pygame.K_s]:
             self.move(-dt)
+        if keys[pygame.K_SPACE]:
+            self.shoot()
+            
+        self.timer -= dt
+
+    def shoot(self):
+        if self.timer > 0:
+            return
+        self.timer = PLAYER_SHOOT_COOLDOWN
+        Shot(self.position.x, self.position.y, (pygame.Vector2(0, 1).rotate(self.rotation)) * PLAYER_SHOOT_SPEED)
 
     # in the player class
     def triangle(self):

shot.py

@@ -0,0 +1,13 @@
+import pygame
+from circleshape import CircleShape
+from constants import SHOT_RADIUS
+class Shot(CircleShape):
+    def __init__(self, x, y, velocity):
+        super().__init__(x, y, SHOT_RADIUS)
+        self.velocity = velocity
+    
+    def draw(self, screen):
+        pygame.draw.circle(screen, "white", self.position, self.radius, 2)
+
+    def update(self, dt):
+        self.position += (self.velocity * dt)