created ball and bouncing off paddles

pypong/game_files/game.py

@@ -1,11 +1,16 @@
+import math
 import pygame
 import pypong
+import random
+import time
 
 SCREEN_SIZE = (800, 600)  # Size of the game window
 GAME_FPS = 60
 GAME_COLOR = (255, 255, 255)  # Color of all the sprites on screen
 PADDLE_SIZE = (20, 200)
 PADDLE_SPEED = 10
+BALL_SIZE = 30
+BALL_SPEED = 7
 
 
 class Paddle(pygame.sprite.Sprite):
@@ -31,7 +36,39 @@ class Paddle(pygame.sprite.Sprite):
             self.rect.bottom = SCREEN_SIZE[1]
 
 
-def game(is_host=False):
+class Ball(pygame.sprite.Sprite):
+    def __init__(self):
+        super().__init__()
+
+        # Booleans to randomize direction of the ball upon spawning
+        initial_x_vel_negative = bool(random.getrandbits(1))
+        initial_y_vel_negative = bool(random.getrandbits(1))
+
+        self.x_vel = BALL_SPEED
+        self.y_vel = BALL_SPEED
+        if initial_x_vel_negative:  # Flip ball speed based on random bools
+            self.x_vel = -BALL_SPEED
+        if initial_y_vel_negative:
+            self.y_vel = -BALL_SPEED
+
+        self.image = pygame.Surface((BALL_SIZE, BALL_SIZE), pygame.SRCALPHA)
+        pygame.draw.circle(self.image, GAME_COLOR, (BALL_SIZE / 2, BALL_SIZE / 2), math.floor(BALL_SIZE / 2.0))
+        self.rect = self.image.get_rect()
+
+    def update(self):
+        self.rect.centerx += self.x_vel
+        self.rect.centery += self.y_vel
+
+        # Always bounce ball if it hits the top or bottom of the screen
+        if self.rect.top <= 0:
+            self.rect.top = 0
+            self.y_vel *= -1
+        if self.rect.bottom >= SCREEN_SIZE[1]:
+            self.rect.bottom = SCREEN_SIZE[1]
+            self.y_vel *= -1
+
+
+def game(is_host=True):
     """
     Starts the game.
     """
@@ -88,8 +125,26 @@ def game(is_host=False):
     # Create the two paddles
     host_player = Paddle()
     client_player = Paddle()
+    host_player.rect.centery = SCREEN_SIZE[1] / 2
+    client_player.rect.centery = SCREEN_SIZE[1] / 2
     client_player.rect.right = SCREEN_SIZE[0]  # Move client paddle to other side
     all_sprites.add(host_player, client_player)
+    paddle_sprites = pygame.sprite.Group()
+    paddle_sprites.add(host_player, client_player)
+
+    # Create the ball
+    ball = Ball()
+    ball.rect.centerx = SCREEN_SIZE[0] / 2
+    # The ball is moved up or down a random amount
+    ball.rect.centery = (SCREEN_SIZE[1] / 2) + random.randint(-25, 25)
+    all_sprites.add(ball)
+
+    # Create the scoreboard
+    # host_score = 0
+    # client_score = 0
+
+    draw()
+    time.sleep(1)
 
     while running:
         clock.tick(GAME_FPS)
@@ -100,6 +155,10 @@ def game(is_host=False):
         else:
             keyboard_movement(client_player)
 
+        # Bounce ball off of paddles
+        if pygame.sprite.spritecollideany(ball, paddle_sprites):
+            ball.x_vel *= -1
+
 
 def main():
     """