Catch It

Lesson 12 of 40 in Coddy's Make Games with Pygame course.

Two rectangles collide when they overlap. a.colliderect(b) is True when Rect a and Rect b overlap, even by one pixel.

if block.colliderect(basket):
    block.y = -20
    block.x = random.randint(0, 460)

A caught block goes back to the top, the same way as a missed one. Testing the overlap is safer than testing exact positions: a block moving 3 pixels at a time can skip right over the one y value you test for.

Challenge

Easy

After the missed-block check, when the block collides with the basket, send it back to the top: block.y = -20 and a random block.x, as for a missed block.

Try it yourself

import random
import pygame

pygame.init()
screen = pygame.display.set_mode((480, 360))
pygame.display.set_caption("Catch the Blocks")
clock = pygame.time.Clock()

basket = pygame.Rect(200, 330, 80, 16)
block = pygame.Rect(220, 0, 20, 20)

running = True
while running:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            running = False

    keys = pygame.key.get_pressed()
    if keys[pygame.K_LEFT]:
        basket.x -= 8
    if keys[pygame.K_RIGHT]:
        basket.x += 8
    basket.clamp_ip(screen.get_rect())

    block.y += 3
    if block.top > 360:
        block.y = -20
        block.x = random.randint(0, 460)

    screen.fill((30, 30, 46))
    pygame.draw.rect(screen, (80, 160, 255), basket)
    pygame.draw.rect(screen, (235, 80, 80), block)
    pygame.display.flip()
    clock.tick(60)

pygame.quit()