python之pygame:自定义类继承自 pygame.Surface

我是第一次玩 pygame(总的来说我是 python 的新手)，想知道是否有人可以帮助我...

我正在制作一款小型射击游戏，希望能够为坏人创建一个类。我的想法是类应该继承自 pygame.Surface，但这给我带来了各种各样的问题(def，可能是我搞砸了基本的继承/类的东西)。例如，为什么这不起作用(pygame、screen 等都可以正常工作并用于代码的其他部分，我只是想将我已经在使用的函数移动到一个类中):

class Zombie(pygame.Surface): 
  x_pos = y_pos = 0 
  def __init__(self, x, y): 
    #create zombie 
    self = pygame.image.load('zombie_1.png') 
    self = pygame.transform.scale(self,(50, 50)) 
 
    x_pos = x 
    y_pos = y 
 
zombie = Zombie(screen.get_width()/3, screen.get_height()/3) 
screen.blit(zombie, (zombie.x_pos, zombie.y_pos)) 

上面产生了一个错误:“pygame.error: display Surface quit” 编辑:显然这是在调用 pygame.display.quit() 之后调用 Surface 的结果。任何有 pygame 经验的人都想尝试一下吗？

完整代码:

#Initialize 
import pygame, sys 
pygame.init() 
 
#classes 
class Zombie(pygame.Surface): 
  x_pos = y_pos = 0 
  def __init__(self, x, y): 
    #create zombie 
    self = pygame.image.load('zombie_1.png') 
    self = pygame.transform.scale(self,(50, 50)) 
 
    x_pos = x 
    y_pos = y 
 
  def is_hit(mouse_pos): 
    #grab variables 
    (mouseX, mouseY) = mouse_pos 
    print "\nboxW_x, y = " + str(self.x) + ", " + str(self.y) + "\nmouseX, Y = " + str(mouseX) + ", " + str(mouseY)  
    headshot_x = self.x + (.5 * zombie.get_width()) 
    headshot_y = self.y + (.25 * zombie.get_height()) 
    margin_of_error_x = (zombie.get_width()/float(1000)) * zombie.get_width() 
    margin_of_error_y = (zombie.get_height()/float(1000)) * zombie.get_height() 
    print "Headshot_x: " + str(headshot_x) + ", " + str(headshot_y) 
    print "diff in headshot and actual shot: " + str(mouseX - headshot_x) + ", " + str(mouseY - headshot_y) 
    print "margin of error x = " + str(margin_of_error_x) + " y = " + str(margin_of_error_y) 
    print "zombie size: " + str(zombie.get_size()) 
 
    valid_x = valid_y = False 
 
    if abs(mouseX-headshot_x) < margin_of_error_x: 
      valid_x = True 
      print "valid x" 
    if abs(mouseY-headshot_y) < margin_of_error_y: 
      valid_y = True 
      print "valid y" 
 
    return (valid_x and valid_y) 
 
#list of bad guys 
zombie_list = [] 
 
#functions (which should later be moved into classes) 
def is_hit(): 
  #grab variables 
  (mouseX, mouseY) = pygame.mouse.get_pos() 
  print "\nboxW_x, y = " + str(boxW_x) + ", " + str(boxW_y) + "\nmouseX, Y = " + str(mouseX) + ", " + str(mouseY)  
  headshot_x = boxW_x + (.5 * boxW.get_width()) 
  headshot_y = boxW_y + (.25 * boxW.get_height()) 
  margin_of_error_x = (boxW.get_width()/float(1000)) * boxW.get_width() 
  margin_of_error_y = (boxW.get_height()/float(1000)) * boxW.get_height() 
  print "Headshot_x: " + str(headshot_x) + ", " + str(headshot_y) 
  print "diff in headshot and actual shot: " + str(mouseX - headshot_x) + ", " + str(mouseY - headshot_y) 
  print "margin of error x = " + str(margin_of_error_x) + " y = " + str(margin_of_error_y) 
  print "zombie size: " + str(boxW.get_size()) 
 
  valid_x = valid_y = False 
 
  if abs(mouseX-headshot_x) < margin_of_error_x: 
    valid_x = True 
    print "valid x" 
  if abs(mouseY-headshot_y) < margin_of_error_y: 
    valid_y = True 
    print "valid y" 
 
  return (valid_x and valid_y) 
 
pygame.mouse.set_visible(True) 
pygame.mouse.set_cursor(*pygame.cursors.diamond) 
 
#Display 
screen = pygame.display.set_mode((640, 640)) 
pygame.display.set_caption("Zombie Massacre") 
 
#Entities 
#background 
background = pygame.Surface(screen.get_size()) 
background = background.convert() 
background.fill((0, 0, 0)) 
 
#make a zombie 
boxW = pygame.image.load('zombie_1.png') 
boxW = pygame.transform.scale(boxW,(50, 50)) 
 
#set up some box variables 
boxW_x = screen.get_width()/3 
boxW_y = screen.get_height()/3 
 
#testing zombie class 
zombie = Zombie(screen.get_width()/3, screen.get_height()/3) 
 
#Action 
 
#Assign 
clock = pygame.time.Clock() 
keepGoing = True 
 
#Loop 
count = 0; 
rotation_vect = 1.01 
while keepGoing: 
 
  #setup rotation_vect for this pass 
  if (count % 3) == 0: 
    rotation_vect = 0 - rotation_vect 
 
  #Time 
  clock.tick(30) 
 
  #Events 
  for event in pygame.event.get(): 
    if event.type == pygame.QUIT: 
      keepGoing = False 
    elif event.type is pygame.MOUSEBUTTONDOWN: 
      #loop through zombie list, using each one's "is_hit()" function 
      keepGoing = not(is_hit()) 
 
#Refresh screen 
  screen.blit(background, (0,0)) 
  boxW = pygame.transform.rotozoom(pygame.image.load('zombie_1.png'), rotation_vect, 1.01) 
  boxW = pygame.transform.scale(boxW,(count+50, count+100)) 
#for zombie in zombies 
  screen.blit(boxW,(boxW_x+(boxW_x * .1), boxW_y+(boxW_y * .1))) 
# error is result of following line 
  screen.blit(zombie, (zombie.x_pos, zombie.y_pos)) 
  pygame.display.flip() 
 
#increment count 
  count += 1 

请您参考如下方法:

您没有调用继承的构造函数:

class Zombie(pygame.Surface): 
    def __init__(self, x, y): 
        pygame.Surface.__init__(self, size=(w,h)) 

并且您正在分配给self。那是行不通的。