pygam中的碰撞检测问题

Question

我有一个游戏，用户可以移动一个球员（“Mrhinkleberg”）使用箭头键。还有两个“敌人”会自动上下弹跳。你知道吗

我现在如何检测玩家和敌人之间的碰撞？你知道吗

这是我目前掌握的代码：

import pygame
import time
pygame.init()
window = pygame.display.set_mode((800,800))
pygame.display.set_caption("Yues")
theboard = pygame.image.load('theboard.png')
enemy = pygame.image.load('mrenemy.png')
mrhinckleberg = pygame.image.load('MrHinckleBerg.png')
mrhincklebergdead = pygame.image.load('MrHinckleBergdead.png')
deathscreen = pygame.image.load('deathscreen.png')
black = (0,0,0)
clock1 = pygame.time.Clock()
def quitt():
    pygame.quit()
    quit()
playerx = 750
playery = 450
enemydirection = 'down'
enemyx = 500
enemyy = 50
enemyspeed = 100
enemydirection2 = 'up'
enemyx2 = 350
enemyy2 = 750
enemyspeed2 = 50
enemydirection3 = 'down'
enemyx3 = 200
enemyy3 = 50
enemyspeed3 = 150


while True:
    window.blit(theboard, (0,0))
    if enemydirection == 'down':
        enemyy += enemyspeed
        if enemyy >= 790:
            enemydirection = 'up'
    elif enemydirection == 'up':
        enemyy -= enemyspeed
        if enemyy <= 10:
            enemydirection = 'down'


    if enemydirection2 == 'up':
        enemyy2 -= enemyspeed2
        if enemyy2 <= 10:
            enemydirection2 = 'down'
    elif enemydirection2 == 'down':
        enemyy2 += enemyspeed2
        if enemyy2 >= 790:
            enemydirection2 = 'up'

    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            quitt()
        if event.type == pygame.KEYDOWN:
            if event.key == pygame.K_RIGHT:
                playerx += 12
            elif event.key == pygame.K_LEFT:
                playerx -= 12
            elif event.key == pygame.K_UP:
                playery -= 12
            elif event.key == pygame.K_DOWN:
                playery += 12
    if playerx == enemyx and playery == enemyy:
           print("hai")
    window.blit(theboard, (0,0))
    window.blit(mrhinckleberg, (playerx,playery))
    window.blit(enemy, (enemyx,enemyy))
    window.blit(enemy, (enemyx2,enemyy2))
    window.blit(enemy, (enemyx3,enemyy3))
    pygame.display.update()

Answer 1

在我看来，问题是您检查变量playerx是否等于enemyx，但这永远不会是真的，因为您只在特定的间隔内更改enemyx变量（加或减12）。你知道吗

为了避免这种情况，您可以检查playerx/playery和enemyx/enemyy是否在**特定范围**：

if (playerx <= enemyx <= playerx + playerWidth) and \
   (playery <= enemyy <= playery + playerHeight):
       print("hai")

请注意，在Python中，可以链接比较。这意味着5 < x <= 10等价于5 < x and x <= 10。有关详细信息，请参见Built-in Types -> Comparisons。你知道吗

---

更新代码：

import pygame
import time
pygame.init()

window = pygame.display.set_mode((800,800))
pygame.display.set_caption("Yues")

theboard = pygame.image.load('theboard.png')

enemy = pygame.image.load('mrenemy.png')

mrhinckleberg = pygame.image.load('MrHinckleBerg.png')
mrhincklebergdead = pygame.image.load('MrHinckleBergdead.png')

deathscreen = pygame.image.load('deathscreen.png')

playerWidth = mrhinckleberg.get_rect().width
playerHeight = mrhinckleberg.get_rect().height

black = (0,0,0)

clock1 = pygame.time.Clock()
def quitt():
    pygame.quit()
    quit()

playerx = 750
playery = 450

enemydirection = 'down'
enemyx = 500
enemyy = 50
enemyspeed = 3

enemydirection2 = 'up'
enemyx2 = 350
enemyy2 = 750
enemyspeed2 = 2

enemydirection3 = 'down'
enemyx3 = 200
enemyy3 = 50
enemyspeed3 = 1


while True:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            quitt()
        if event.type == pygame.KEYDOWN:
            if event.key == pygame.K_RIGHT:
                playerx += 12
            elif event.key == pygame.K_LEFT:
                playerx -= 12
            elif event.key == pygame.K_UP:
                playery -= 12
            elif event.key == pygame.K_DOWN:
                playery += 12

    if enemydirection == 'down':
        enemyy += enemyspeed
        if enemyy >= 790:
            enemydirection = 'up'
    elif enemydirection == 'up':
        enemyy -= enemyspeed
        if enemyy <= 10:
            enemydirection = 'down'

    if enemydirection2 == 'up':
        enemyy2 -= enemyspeed2
        if enemyy2 <= 10:
            enemydirection2 = 'down'
    elif enemydirection2 == 'down':
        enemyy2 += enemyspeed2
        if enemyy2 >= 790:
            enemydirection2 = 'up'

    if (playerx <= enemyx <= playerx + playerWidth) and (playery <= enemyy <= playery + playerHeight):
       print("hai")

    window.blit(theboard, (0,0))

    window.blit(mrhinckleberg, (playerx,playery))

    window.blit(enemy, (enemyx,enemyy))
    window.blit(enemy, (enemyx2,enemyy2))
    window.blit(enemy, (enemyx3,enemyy3))

    pygame.display.update()

我希望这有帮助：）