How To Make The Ball Bounce Only If It Hits The Paddle In Python, Pygame (breakout Recreation)

can anyone help me with this? i am having trouble making a simple way to detect if a ball hits a paddle and then bounce it by changing the rect_change_y variable. here is code that

Solution 1:

You can use the Rect class to represent the ball and the paddle, and also take advantage of the methods this class provides:

• Rect.move_ip to move the rectangles in place:

  myrect = pygame.Rect(0, 0, 10, 10)
  myrect.move_ip(100, 50)
  

  myrect top left corner is at (100, 50) and keeps the same width and height.

• Rect.clamp_ip to ensure the rectangles are both inside the screen.

  myrect = pygame.Rect(100, 0, 10, 10)
  bounds = pygame.Rect(0, 0, 50, 50)
  myrect.clamp_ip(bounds)
  

  myrect top left corner is at (40, 0) and its bottom right corner at (10, 50), inside bounds rectangle.

• Rect.colliderect to check if the ball and the paddle collide.

  myrect = pygame.Rect(0, 0, 10, 10)
  another = pygame.Rect(5, 5, 10, 10)
  print(myrect.colliderect(another)) # 1

  Since myrect and another overlap, when you call colliderect it returns 1, indicating that there is a collision between the two rectangles.

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I really like Pygame, so I don't mind to rewrite your program applying these suggestions. Hope it helps:

import pygame

# Constants
WIDTH = 700
HEIGHT = 500
SCREEN_AREA = pygame.Rect(0, 0, WIDTH, HEIGHT)
BLACK = (0, 0, 0)
WHITE = (255, 255, 255)

# Initialization
pygame.init()
screen = pygame.display.set_mode([WIDTH, HEIGHT])
pygame.mouse.set_visible(0)
pygame.display.set_caption("Breakout Recreation WIP")
clock = pygame.time.Clock()

# Variables
paddle = pygame.Rect(350, 480, 50, 10)
ball = pygame.Rect(10, 250, 15, 15)
paddle_movement_x = 0
ball_direction = (1, 1)
balls = 3
done = False

while not done and balls > 0:

    # Process events
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            done = True
        keys = pygame.key.get_pressed()
        if keys[pygame.K_LEFT]:
            paddle_movement_x = -2
        elif keys[pygame.K_RIGHT]:
            paddle_movement_x = 2
        else:
            paddle_movement_x = 0

    # Move paddle
    paddle.move_ip(paddle_movement_x, 0)
    paddle.clamp_ip(SCREEN_AREA)

    # Move ball
    ball.move_ip(*ball_direction)
    if ball.right > WIDTH or ball.left < 0:
        ball_direction = -ball_direction[0], ball_direction[1]
    elif ball.top < 0 or ball.bottom > HEIGHT or paddle.colliderect(ball):
        ball_direction = ball_direction[0], -ball_direction[1]
    ball.clamp_ip(SCREEN_AREA)

    # Redraw screen
    screen.fill(BLACK)
    pygame.draw.rect(screen, WHITE, paddle)
    pygame.draw.rect(screen, WHITE, ball)
    pygame.display.flip()
    clock.tick(100)

pygame.quit()