问题描述
我正在尝试制作一个飞船游戏，你可以在其中控制飞船并发射子弹来摧毁敌舰。我试图让屏幕充满硬币，但是当我运行时，没有硬币出现？我怎样才能让硬币填满屏幕？
这是我当前的代码（主要和部分省略或替换或通过）：
from tools import *
class Spaceship(pygame.sprite.Sprite):
def __init__(self,s,x,y):
pass
def update(self):
self.rect.center = (self.x,self.y)
class Bullet(pygame.sprite.Sprite):
def __init__(self,y):
pass
def update(self):
self.y -= 5
self.rect.center = (self.x,self.y)
if self.y < 0:
self.kill()
class Enemy(pygame.sprite.Sprite):
def __init__(self,y,t):
pygame.sprite.Sprite.__init__(self)
self.type = t
self.screen,self.x,self.y = s,y
self.image = pygame.image.load(get_enemy_image()[self.type])
if self.type == "N1 galaxy fighter":
self.image = pygame.transform.scale(self.image,(235,215))
elif self.type == "M7 Comet Glider":
self.image = pygame.transform.scale(self.image,(155,215))
self.rect = self.image.get_rect()
self.rect = self.image.get_rect()
self.rect.center = (self.x,self.y)
self.score_given = get_enemy_given_score()[self.type]
def update(self):
if self.y < 0:
self.kill()
self.y += 3
self.rect.center = (self.x,self.y)
class GameOverBackground(pygame.sprite.Sprite):
def __init__(self,size=(100,100)):
pygame.sprite.Sprite.__init__(self)
self.screen,y
self.size = size
self.image = pygame.image.load("Game_Over.jpg")
self.image = pygame.transform.scale(self.image,self.size)
self.rect = self.image.get_rect()
def blitme(self):
self.screen.blit(self.image,self.rect)
class Coin(pygame.sprite.Sprite):
def __init__(self,pos=(0,0),100)):
pygame.sprite.Sprite.__init__(self)
self.x,self.y = pos[0],pos[1]
self.size = size
self.image = pygame.image.load("coin.png")
self.image = pygame.transform.scale(self.image,self.size)
self.rect = self.image.get_rect()
self.rect.center = (self.x,self.y)
def update(self):
self.rect.center = (self.x,self.y)
bg = GameOverBackground(screen,size=(800,500))
spaceship = Spaceship(screen,400,400)
bullets = pygame.sprite.Group()
enemies = pygame.sprite.Group()
coins = pygame.sprite.Group()
clock = pygame.time.Clock()
enemy_interval = 2000 # It's in milliseconds
enemy_event = pygame.USEREVENT + 1
pygame.time.set_timer(enemy_event,enemy_interval)
score = 0
lives = 3
with open("high_score.txt","r") as file:
highscore = file.read()
font = pygame.font.SysFont("Arial",30)
score_text_surface = font.render("score: {:,}".format(score),True,(0,0))
lives_text_surface = font.render("HP: %s" % lives,0))
high_score_text_surface = font.render("High score: %s" % highscore,0))
spaceship_collided = False
running = True
while running:
for event in pygame.event.get():
if event.type == pygame.QUIT:
running = False
if event.type == MOUSEBUTTONDOWN:
bullet = Bullet(screen,spaceship.x,spaceship.y - 20)
bullets.add(bullet)
if event.type == enemy_event and not lives <= 0:
enemy = Enemy(screen,randint(-100,725),choice(["N1 galaxy fighter","M7 Comet Glider"]))
enemies.add(enemy)
screen.fill((255,255,255)) # DO NOT DRAW ANYTHING IN FRONT OF THIS LINE,I'M WARNING YOU
bullets.update()
key = pygame.key.get_pressed()
amount = 5
if key[pygame.K_a]:
spaceship.x -= amount
elif key[pygame.K_d]:
spaceship.x += amount
elif key[pygame.K_w]:
spaceship.y -= amount
elif key[pygame.K_s]:
spaceship.y += amount
spaceship.update()
if not lives <= 0:
screen.blit(spaceship.image,spaceship.rect)
if not lives <= 0:
bullets.draw(screen)
enemies.draw(screen)
for i in enemies:
i.update()
if pygame.sprite.spritecollide(i,bullets,True):
score += i.score_given
i.kill()
if spaceship_collided and lives <= 0:
bg.blitme()
if score > int(highscore):
with open("high_score.txt","w") as file:
file.write(str(score))
if score >= 99999:
score = 99999
score_text_surface = font.render("score: {:,0))
screen.blit(score_text_surface,(590,0))
lives_text_surface = font.render("HP: %s" % lives,0))
screen.blit(lives_text_surface,(260,0))
high_score_text_surface = font.render("High score: %s" % highscore,0))
screen.blit(high_score_text_surface,(360,0))
# Coins
coins.add(Coin((randint(-200,200),randint(-200,200))))
coins.update()
if pygame.sprite.spritecollide(spaceship,enemies,dokill=True):
lives -= 1
spaceship_collided = True
pygame.display.update()
clock.tick(60)
这是我的 tools.py 代码：
def get_enemy_given_score():
return {"N1 galaxy fighter": 10,"M7 Comet Glider": 20}
def get_enemy_image():
return {"N1 galaxy fighter": "enemy1.png","M7 Comet Glider": "enemy2.png"}
解决方法
您必须在 coins 组中抽取硬币。此外，我建议限制硬币的数量（例如 100）：
coins = pygame.sprite.Group()
# [...]
while running:
# [...]
if len(coins) < 100:
coins.add(Coin((randint(-200,200),randint(-200,200))))
coins.update()
# [...]
coins.draw(screen) # <--- draw the Sprites contained in coins
pygame.display.update()
pygame.sprite.Group.draw() 和 pygame.sprite.Group.update() 是由 pygame.sprite.Group 提供的方法。
前者将 委托给包含的 pygame.sprite.Sprites 的 update 方法 - 您必须实现该方法。见pygame.sprite.Group.update()：
对组中的所有 Sprite 调用 update() 方法 [...]
后者使用包含的 image 的 rect 和 pygame.sprite.Sprite 属性来绘制对象 - 您必须确保 pygame.sprite.Sprite 具有所需的属性。见pygame.sprite.Group.draw()：
将包含的精灵绘制到 Surface 参数。这对源表面使用 Sprite.image 属性和 Sprite.rect。 [...]