Comment détecter les collisions entre rectangles dans Pygame ?

Comment détecter les collisions entre deux objets ou images rectangulaires dans Pygame

Problème :

Vous développez un jeu dans lequel un bol doit attraper des objets qui tombent. Vous disposez d'images pour les objets et le bol, mais vous ne savez pas comment détecter les collisions entre eux.

import math
import pygame
import random

# Game initialization
pygame.init()
# Screen dimensions
display_width = 800
display_height = 600

# Initialize the screen
game_display = pygame.display.set_mode((display_width, display_height))
# Set the clock
clock = pygame.time.Clock()
# Game title
pygame.display.set_caption("Catch the Ball")

# Colors and images
white = (255, 255, 255)
black = (0, 0, 0)
red = (255, 0, 0)
blue = (0, 255, 0)

player_img = pygame.image.load("Images/soup.png")
thing_imgs = [
    pygame.image.load('Images/muffin.png'),
    pygame.image.load('Images/dessert.png'),
    pygame.image.load('Images/cheese.png'),
    pygame.image.load('Images/fruit.png'),
]


def player(x, y):
    game_display.blit(player_img, (x, y))


def things(x, y, img):
    game_display.blit(img, (x, y))


def game_loop():
    running = True

    x = display_width * 0.45
    y = display_height * 0.8
    x_change = 0

    player_width = 64
    player_height = 64

    things_cor = [[random.randint(0, display_width), 32]]
    things_added = [random.choice(thing_imgs)]
    thing_height = 32
    thing_width = 32
    y_change = 5

    caught = 0

    while running:
        for event in pygame.event.get():
            # Quit the game
            if event.type == pygame.QUIT:
                running = False

            # Player movement
            if event.type == pygame.KEYDOWN:
                if event.key == pygame.K_LEFT:
                    x_change = -5

                if event.key == pygame.K_RIGHT:
                    x_change = 5

            # Stop player movement
            if event.type == pygame.KEYUP:
                if event.key == pygame.K_LEFT or event.key == pygame.K_RIGHT:
                    x_change = 0

        # Clear the screen
        game_display.fill(white)

        player(x, y)
        # Update the player's position
        x += x_change

        for i in range(len(things_cor)):
            thing_x, thing_y = things_cor[i]
            things(thing_x, thing_y, things_added[i])

        for i in range(len(things_cor)):
            things_cor[i][1] += y_change
            # Reset the item to the top of the screen if it goes off the bottom
            if things_cor[i][1] > display_height:
                things_cor[i][1] = random.randint(-2000, -1000)
                things_cor[i][0] = random.randint(0, display_width)
                things_added[i] = random.choice(thing_imgs)

                # Add a new item if the list is less than 6
                if len(things_added) < 6:
                    things_cor.append(
                        [random.randint(0, display_width), -10]
                    )

        # Limit player movement
        if x < 0:
            x = 0
        elif x > display_width - player_width:
            x = display_width - player_width

        # Delay the game start by 100 seconds
        passed_time = pygame.time.get_ticks()  # Time in milliseconds
        start_time = 100 * 1000  # Start time in milliseconds

        # Update the scene and display
        if passed_time >= start_time:
            game_display.fill(white)
            player(x, y)
            for i in range(len(things_cor)):
                thing_x, thing_y = things_cor[i]
                things(thing_x, thing_y, things_added[i])
            pygame.display.update()

        # Set the frame rate
        clock.tick(60)


game_loop()

Solution :

Pour détecter les collisions entre deux objets rectangulaires ou des images dans Pygame, utilisez l'objet pygame.Rect et la méthode colliderect() :

# Create rectangles for the player and the items
player_rect = player_img.get_rect(topleft = (x, y))
for i in range(len(things_cor)):
    thing_rect = things_added[i].get_rect(topleft = things_cor[i])

# Check for collisions
if player_rect.colliderect(thing_rect):
    print("hit")

En plaçant ce code dans le boucle de jeu, vous pouvez vérifier en permanence les collisions entre le joueur et les objets.

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