python - Sprite 碰撞(spritecollideany())不起作用？

Question

我是编码新手，我正在尝试我无法找出为什么我的 pygame spritecollideany() 函数没有执行任何操作。这是一款平台游戏，我的玩家在掉入地面 Sprite 时没有做任何事情。我没有收到错误消息，我认为语法是正确的，但我的代码中的某些内容没有链接起来。很抱歉发布我所有困惑的代码，但我不知道问题的根源是什么。

没有做任何事情的代码:

if pygame.sprite.spritecollideany(player, ground_sprites):
            print("COLLISION IS WORKING")

所有代码

import pygame, sys, random

SCREEN_WIDTH = 800
SCREEN_HEIGHT = 600
screen = pygame.display.set_mode([SCREEN_WIDTH, SCREEN_HEIGHT])
pygame.display.set_caption("Pygame Platformer")
clock = pygame.time.Clock()

gravity = 0

class Player(pygame.sprite.Sprite):
    def __init__(self, x, y):
        super().__init__()
        self.x = x
        self.y = y
        self.image = pygame.image.load("marioLeft.png")
        self.rect = self.image.get_rect(midtop = (self.x, self.y))

    def Move(self):
        keys = pygame.key.get_pressed()
        if keys[pygame.K_RIGHT]:
            self.x += 5
        if keys[pygame.K_LEFT]:
            self.x -= 5

    def Draw(self, surface):
        surface.blit(self.image, (self.x, self.y))

    def Collision(self):
        pass

class Ground(pygame.sprite.Sprite):
    def __init__(self, x, y, width, height):
        super().__init__()
        self.x = x
        self.y = y
        self.width = width
        self.height = height

        self.image = pygame.Surface((width, height))
        self.rect = self.image.get_rect(midtop = (x, y))
        self.image.fill('White')

    def DrawGround():
        for entity in ground_sprites:
            screen.blit(entity.image, entity.rect)

#INSTANTIATION
player_group = pygame.sprite.Group()
player = Player(100, 250)
player_group.add(player)

ground_sprites = pygame.sprite.Group()
ground1 = Ground(100, 500, 200, 100)
ground2 = Ground(450, 400, 200, 100)
ground_sprites.add(ground1, ground2)

run = True
while run:
    clock.tick(60)
    screen.fill('Black')
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.quit()
            exit()

    gravity += 1
    if gravity >= 20:
        gravity = 20
    player.y += gravity

    if pygame.sprite.spritecollideany(player, ground_sprites):
            print("COLLISION IS WORKING")

    Ground.DrawGround()
    player.Draw(screen)
    player.Move()
    player.Collision()

    pygame.display.update()

Answer 1

pygame.sprite.spritecollideany (以及所有其他碰撞检测函数)使用 pygame.sprite.Sprite 的 rect 属性对象来检测碰撞。所以你需要在移动 Sprite 时更新存储在rect属性中的位置:

class Player(pygame.sprite.Sprite):
    # [...]

    def Move(self):
        keys = pygame.key.get_pressed()
        if keys[pygame.K_RIGHT]:
            self.x += 5
        if keys[pygame.K_LEFT]:
            self.x -= 5
        self.rect.x = self.x               # <---

实际上，您根本不需要self.x 和self.y。使用 self.rect.x 和 self.rect.y 代替:

class Player(pygame.sprite.Sprite):
    def __init__(self, x, y):
        super().__init__()
        self.image = pygame.image.load("marioLeft.png")
        self.rect = self.image.get_rect(midtop = (x, y))

    def Move(self):
        keys = pygame.key.get_pressed()
        if keys[pygame.K_RIGHT]:
            self.rect.x += 5
        if keys[pygame.K_LEFT]:
            self.rect.x -= 5

    def Draw(self, surface):
        surface.blit(self.image, self.rect)