[英]How to spawn multiple enemies in pygame
所以我試圖制作一個游戲,角色應該躲避從上方隨機產生的敵人。 問題是,我不知道如何在不實例化另一個類的情況下使隨機值不同,這是我不想做的。 此外,使用 Screen.fill(),敵人不會出現,因為它們每幀都被顏色重疊,如果我不使用 Screen.fill(),我的角色每次移動時都會留下痕跡。 有什么建議?
import random
pygame.init()
Running = True
Screen = pygame.display.set_mode((800, 600))
player_img = pygame.image.load('/Users/kevinhadinata/Downloads/ufo.png')
player_updated = pygame.transform.scale(player_img,(60,60))
enemy_list = []
enemy_img = pygame.image.load('/Users/kevinhadinata/Downloads/alien.png')
SPAWNENEMY = pygame.USEREVENT
pygame.time.set_timer(SPAWNENEMY,1000)
class Player:
def __init__(self):
self.ypos = 540
self.xpos = 325
self.height = 60
self.width = 60
self.playerUpdated = player_updated
def create_player(self):
Playerss = pygame.Rect(self.xpos,self.ypos,self.height,self.width)
pygame.draw.ellipse(Screen, (0, 0, 0), Playerss)
Screen.blit(player_updated, (Playerss.x, Playerss.y))
sizee = random.randint(10,40)
randomX = random.randint(0,700)
class Enemy:
def __init__(self):
self.xval = random.randint(0,700)
self.size = random.randint(10,40)
def create_enemy(self):
Enemy = pygame.Rect(self.xval, 0, self.size,self.size)
#enemy_updated = pygame.transform.scale(enemy_img,(self.size,self.size))
enemy_list.append(Enemy)
pygame.draw.ellipse(Screen,(255,255,0),Enemy)
Player = Player()
Enemys = Enemy()
while Running:
Screen.fill((0,0,0))
for event in pygame.event.get():
if event.type == pygame.QUIT:
Running = False
if event.type == pygame.KEYDOWN:
if event.key == pygame.K_LEFT:
Player.xpos -= 20
if event.key == pygame.K_RIGHT:
Player.xpos += 20
if event.type == SPAWNENEMY:
Enemys.create_enemy()
Player.create_player()
pygame.display.update()
最好不要實例化一個新的敵人,因為只需將它回收到屏幕頂部就足夠了。 這相當於簡單地改變大小 & x,y。
您的某些代碼使用Enemy
變量名遮擋了Enemy
類名。 我已將此變量名稱更改為new_enemy
。
class Enemy:
def __init__(self):
self.recycle() # set the position & size initially
def recycle( self ):
# start or re-start an enemy position
self.size = random.randint(10,40)
self.xval = random.randint(0,700)
self.yval = -self.size # off the screen-top
self.rect = pygame.Rect( self.xval, self.yval, self.size, self.size )
def draw( self, screen ):
pygame.draw.ellipse( screen, (255,255,0), self.rect )
def create_enemy(self):
global enemy_list
new_enemy = Enemy() # create a new Enemy
enemy_list.append( new_enemy ) # add it to the list
然后在你的主循環中,你可以recycle()
任何離開屏幕的敵人。
[...] # in main loop
# draw all the enemies, and re-position any enemies that moved off the screen
for enemy in enemy_list:
enemy.draw( screen )
if ( enemy.ypos > 600 ): # TODO - don't use a fixed size
enemy.recycle() # move back to top
繪制生成代碼是混淆的,我已將其重新安排為單獨的.draw()
函數。 使用它也解決了清除屏幕的問題。 每一幀,代碼都會清除屏幕,然后重新繪制所有項目。
您需要創建一個敵人列表並在主循環中迭代該列表以繪制每個敵人。 使用randint
隨機放置敵人。
試試這個代碼:
import random, pygame
pygame.init()
Running = True
Screen = pygame.display.set_mode((800, 600))
player_img = pygame.image.load('/Users/kevinhadinata/Downloads/ufo.png')
player_updated = pygame.transform.scale(player_img,(60,60))
enemy_list = []
enemy_img = pygame.image.load('/Users/kevinhadinata/Downloads/alien.png')
SPAWNENEMY = pygame.USEREVENT
pygame.time.set_timer(SPAWNENEMY,1000)
class Player:
def __init__(self):
self.ypos = 540
self.xpos = 325
self.height = 60
self.width = 60
self.playerUpdated = player_updated
def create_player(self):
self.Playerss = pygame.Rect(self.xpos,self.ypos,self.height,self.width)
pygame.draw.ellipse(Screen, (0, 0, 0), self.Playerss)
Screen.blit(player_updated, (self.Playerss.x, self.Playerss.y))
def draw(self): # draw player
Screen.blit(player_updated, (self.xpos,self.ypos))
sizee = random.randint(10,40)
randomX = random.randint(0,700)
class Enemys:
def __init__(self):
#self.xval = random.randint(0,700)
self.size = random.randint(10,40)
def create_enemy(self):
Enemy = pygame.Rect(random.randint(100,700), 0, self.size,self.size)
#enemy_updated = pygame.transform.scale(enemy_img,(self.size,self.size))
enemy_list.append(Enemy)
pygame.draw.ellipse(Screen,(255,255,0),Enemy)
def draw(self): # draw all enemies
for e in enemy_list:
pygame.draw.ellipse(Screen,(255,255,0),e)
Player = Player() # player object
Enemys = Enemys() # collection of enemies
Player.create_player()
while Running:
Screen.fill((0,0,0))
for event in pygame.event.get():
if event.type == pygame.QUIT:
Running = False
if event.type == pygame.KEYDOWN:
if event.key == pygame.K_LEFT:
Player.xpos -= 20
if event.key == pygame.K_RIGHT:
Player.xpos += 20
if event.type == SPAWNENEMY:
Enemys.create_enemy()
Player.draw() # draw player
Enemys.draw() # draw all enemies
pygame.display.update()
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