截至目前，敌方精灵仅在轴上生成，并与实际上是滚动背景的播放器“移动”，我希望敌人仅沿X轴移动，以免破坏沉浸。
我还想让精灵生成“离地图”，并且只要地图向它们滚动，它们就会朝着玩家设置的X轴移动？我认为这将使事情变得简单，但现在并不是真正的问题。
我正在尝试为该运动工作的当前代码是：
def move_towards_player(self, player):
# Find direction vector (dx, dy) between enemy and player.
dx, dy = player.rect.x - self.rect.x, player.rect.y - self.rect.y
dist = math.hypot (dx, dy)
dx, dy = dx / dist, dy / dist # Normalize
# Move along this normalized vector towards the player
self.rect.x += dx * self.speed
self.rect.y += dy * self.speed
但这是行不通的，这与导入math模块有关。 （我知道我不需要y动作只是想让它先工作）
这是其余的代码-
Zombie.py：
import pygame
from pygame.locals import *
import random
import math
class ZombieEnemy(pygame.sprite.Sprite):
def __init__(self, x=300, y=360):
pygame.sprite.Sprite.__init__(self)
self.image = pygame.image.load('images/zombie.png')
self.rect = self.image.get_rect()
self.rect.center = (x, y)
all_zombies = pygame.sprite.Group()
for i in range( 50 ):
new_x = random.randrange( 0, 10000) # random x-position
# new_y = random.randrange( 0, ) # random y-position
all_zombies.add(ZombieEnemy(new_x)) # create, and add to group
我不确定是否应该为敌人的动作创建全新的类，或者我的搭档目前正在为Player做哪些工作，并使精灵动画和动作正常工作。
但这是我到目前为止的主要代码：
import pygame
from Zombie import *
import math
from pygame.locals import *
pygame.init()
win = pygame.display.set_mode((900,567))
pygame.display.set_caption("Power Rangers ZOMBIES")
walkRight = [pygame.image.load('images/walk1.png'), pygame.image.load('images/walk2.png'), pygame.image.load('images/walk3.png'), pygame.image.load('images/walk4.png'), pygame.image.load('images/walk5.png'), pygame.image.load('images/walk6.png')]
walkLeft = [pygame.image.load('images/leftwalk2.png'), pygame.image.load('images/leftwalk3.png'), pygame.image.load('images/leftwalk4.png'), pygame.image.load('images/leftwalk5.png'), pygame.image.load('images/leftwalk6.png'), pygame.image.load('images/leftwalk7.png')]
bg = pygame.image.load('images/background.png')
char = pygame.image.load('images/standingstill.png')
clock = pygame.time.Clock()
class Player(pygame.sprite.Sprite):
def __init__(self,x,y,width,height):
self.x = x
self.y = y
self.width = width
self.height = height
self.vel = 0
self.isJump = False
self.left = False
self.right = False
self.walkCount = 0
self.jumpCount = 10
def draw(self, win):
if self.walkCount + 1 >= 18:
self.walkCount = 0
if self.left:
win.blit(walkLeft[self.walkCount//3], (self.x,self.y))
self.walkCount += 1
elif self.right:
win.blit(walkRight[self.walkCount//3], (self.x,self.y))
self.walkCount +=1
else:
win.blit(char, (self.x,self.y))
class Background(pygame.sprite.Sprite):
def __init__(self, image_file, location):
pygame.sprite.Sprite.__init__(self) #call Sprite initializer
self.image = pygame.image.load('images/background.png')
self.rect = self.image.get_rect()
self.rect.left, self.rect.top = location
BackGround = Background('images/background.png', [0,0])
# def redrawGameWindow():
# win.blit(bg, (0,0))
# man.draw(win)
# pygame.display.update()
#mainloop
man = Player(100, 340, 40, 60)
run = True
while run:
clock.tick(27)
for event in pygame.event.get():
if event.type == pygame.QUIT:
run = False
keys = pygame.key.get_pressed()
if keys[pygame.K_LEFT] and man.x > man.vel:
BackGround.rect.left = BackGround.rect.left + int(10)
man.x -= man.vel
man.left = True
man.right = False
elif keys[pygame.K_RIGHT]: #and man.x < 500 - man.width - man.vel:
BackGround.rect.left = BackGround.rect.left - int(10)
man.x += man.vel
man.right = True
man.left = False
else:
man.right = False
man.left = False
man.walkCount = 0
if not(man.isJump):
if keys[pygame.K_SPACE]:
man.isJump = True
man.right = False
man.left = False
man.walkCount = 0
else:
if man.jumpCount >= -10:
neg = 1
if man.jumpCount < 0:
neg = -1
man.y -= (man.jumpCount ** 2) * 0.5 * neg
man.jumpCount -= 1
else:
man.isJump = False
man.jumpCount = 10
# redrawGameWindow()
for zombie in all_zombies:
zombie.move_towards_player(Player)
all_zombie.update()
win.blit(BackGround.image, BackGround.rect)
man.draw(win)
pygame.display.flip()
all_zombies.draw(screen)
pygame.quit()
答案 0 :(得分：1)
我无法运行代码，但看到两个问题
1-move_towards_player必须在类ZombieEnemy内
# --- classes ---
class ZombieEnemy(pygame.sprite.Sprite):
def __init__(self, x=300, y=360):
pygame.sprite.Sprite.__init__(self)
self.image = pygame.image.load('images/zombie.png')
self.rect = self.image.get_rect()
self.rect.center = (x, y)
def move_towards_player(self, player):
# Find direction vector (dx, dy) between enemy and player.
dx, dy = player.rect.x - self.rect.x, player.rect.y - self.rect.y
dist = math.hypot (dx, dy)
dx, dy = dx / dist, dy / dist # Normalize
# Move along this normalized vector towards the player
self.rect.x += dx * self.speed
self.rect.y += dy * self.speed
# --- other ---
all_zombies = pygame.sprite.Group()
2-您必须在主循环中使用它
for zombie in all_zombies:
zombie.move_towards_player(player)
在主循环中
while running:
# --- events ---
for event in pygame.event.get():
if event.type == pygame.QUIT:
running = False
# If keystroke is pressed check right, left.
if event.type == pygame.KEYDOWN:
if event.key == pygame.K_LEFT:
#playerX_change = -2.0
BackGround.rect.left = BackGround.rect.left + 2.5
if event.key == pygame.K_RIGHT:
#playerX_change = 2.0
BackGround.rect.left = BackGround.rect.left - 2.5
# if event.type == pygame.KEYUP:
# if event.key == pygame.K_LEFT or event.key == pygame.K_RIGHT:
# BackGround.rect.left = 0
# --- updates/moves ---
playerX += playerX_change
for zombie in all_zombies:
zombie.move_towards_player(player)
all_zombies.update()
# --- draws ---
screen.blit(BackGround.image, BackGround.rect)
player(playerX,playerY)
all_zombies.draw(screen)
pygame.display.flip()
但是在这里我看到了另一个问题-您的函数希望播放器作为内部带有self.rect的类实例（类似于ZombieEnemy），但是您将player保留为单独的变量playerImg， playerX，playerY，playerX_change
因此，您必须创建类Player或在playerx, playery中使用move_towards_player而不是player.rect.x，player.rect.y