我有一个问题，希望你们能帮助我。在这场足球比赛中，当我在场上移动球员时，球门不会粘在那个位置上，它们会随着球一起移动。
例子：
import pygame
import random
import sys, glob
from pygame.locals import *
class Ball(pygame.sprite.Sprite):
def __init__(self,x,y,image_x):
self.bottom = 20
self.image = pygame.image.load("res/images/ball1.png")
self.rect = self.image.get_rect()
self.rect.x = x
self.rect.y = y
screen.blit(self.image,(self.rect.x,self.rect.y))
self.change_x=x
self.change_y=y
class Field(pygame.sprite.Sprite):
def __init__(self):
pygame.sprite.Sprite.__init__(self)
#self.field = pygame.image.load('res/images/field.png').convert()
#self.field_rect = self.field.get_rect()
#self.field_rect.x = 0
#screen.blit(self.field,(self.field_rect.x,self.field_rect.y))
def goal_top(self):
self.goal_top = pygame.image.load("res/images/goal-top.png")
screen.blit(self.goal_top,(425,0))
def goal_bottom(self):
self.goal_bottom = pygame.image.load("res/images/goal-btm.png")
self.goal_bottom_rect = self.goal_bottom.get_rect()
self.goal_bottom_rect.y = 720
screen.blit(self.goal_bottom,(425,self.goal_bottom_rect.y ))
class Player(pygame.sprite.Sprite):
def __init__(self,x,y,image_x,image_y):
self.bottom = 20
self.image = pygame.image.load("res/images/player/boy.png")
self.rect = self.image.get_rect()
self.rect.x = x
self.rect.y = y
screen.blit(self.image,(self.rect.x,self.rect.y))
self.change_x=x
self.change_y=y
def changespeed_x(self,x):
self.change_x = x
def changespeed_y(self,y):
self.change_y = y
class Camera(object):
def __init__(self, camera_func, width, height):
self.camera_func = camera_func
self.state = Rect(0, 0, width, height)
def apply(self, target):
try:
return target.rect.move(self.state.topleft)
except AttributeError:
return map(sum, zip(target, self.state.topleft))
def update(self, target):
self.state = self.camera_func(self.state, target.rect)
def complex_camera(camera, target_rect):
l, t, _, _ = target_rect
_, _, w, h = camera
l, t, _, _ = -l + HALF_WIDTH, -t+HALF_HEIGHT, w, h
l = min(0, l) # stop scrolling left
l = max(-(camera.width-WIN_WIDTH), l) # stop scrolling right
t = max(-(camera.height-WIN_HEIGHT), t) # stop scrolling bottom
t = min(0, t) # stop scrolling at the top
return Rect(l, t, w, h)
pygame.init()
# Set the height and width of the screen
WIN_WIDTH = 963
WIN_HEIGHT = 760
HALF_WIDTH = int(WIN_WIDTH / 2)
HALF_HEIGHT = int(WIN_HEIGHT / 2)
size=[WIN_WIDTH,WIN_HEIGHT]
screen=pygame.display.set_mode(size)
#screen=pygame.display.set_mode(size,FULLSCREEN)
pygame.display.set_caption("Soccer")
clock=pygame.time.Clock()
x=500
y=280
set_ball_x = 500
set_ball_y = 300
shot = False
type=''
dir_y=0
##INITIAL POSITION OF IMAGES
image_x=0
image_y=0
ball_image_x=0
dir_y=0
##CAMERA TRACK
total_level_width = 963 ##BACKGROUND (Field) width
total_level_height = 1200 ##BACKGROUND (Field) height
camera = Camera(complex_camera, total_level_width, total_level_height)
background = pygame.image.load('res/images/field.png').convert()
background_rect = background.get_rect()
while 1:
clock.tick(20)
screen.blit(background, camera.apply((0,0)))
ball = Ball(set_ball_x,set_ball_y,ball_image_x)
camera.update(ball)
player = Player(x,y,image_x,image_y)
field = Field()
field.goal_top()
field.goal_bottom()
if pygame.key.get_pressed()[pygame.K_RIGHT]:
x=x+6
pos =+1
image_x = 0
if image_y < 90:
image_y +=30
else:
image_y = 0
if pygame.key.get_pressed()[pygame.K_LEFT]:
x=x-6
image_x = 130
if image_y < 90:
image_y +=30
else:
image_y = 0
if pygame.key.get_pressed()[pygame.K_UP]:
y=y-6
image_x = 195
if image_y < 90:
image_y +=30
else:
image_y = 0
if pygame.key.get_pressed()[pygame.K_DOWN]:
y=y+6
image_x = 70
if image_y < 90:
image_y +=30
else:
image_y = 0
if pygame.sprite.collide_rect(player,ball):
set_ball_x = player.change_x
set_ball_y = player.change_y+20
if pygame.key.get_pressed()[pygame.QUIT]:
sys.exit()
if pygame.key.get_pressed()[pygame.K_q]: ## KEY "Q" to EXIT
sys.exit()
for event in pygame.event.get():
if event.type == pygame.QUIT:
pygame.quit()
sys.exit()
pygame.display.flip()
pygame.display.update()
任何想法为什么会发生这种情况？谢谢