我一直在努力开发一款小型射击游戏，我喜欢窗户摇动英雄被击中或失去生命的时间，我想是可以在一次拍摄中重新定位窗口3次时间，但我不知道如何实现这一点，仍然保持游戏运行。
这是我的主要游戏循环的代码：
def game():
#set screen
width = 800
height = 600
pygame.init()
screen = pygame.display.set_mode((width, height))
pygame.display.set_caption('UoN Invaders: Game')
background = pygame.Surface(screen.get_size())
background = background.convert()
background.fill((000, 000, 000))
screen.blit(background, (0, 0))
pygame.display.flip()
#load music with help of helpers.py
music = pygame.mixer.music.load ("data/spacequest.mp3")
pygame.mixer.music.play(-1)
global clock, player, playerSprite, enemySprites, enemiestocreat
global enemiesset, lvl2, laserSprites, enemyExplosion, playerExplosion, explosionSprites
clock = pygame.time.Clock()
i = 0 #setting i that define if the game is just starting of in the middle of the game
space1 = Space1(i)
space2 = Space2()
player = Player()
space1 = pygame.sprite.RenderPlain((space1))
space2 = pygame.sprite.RenderPlain((space2))
playerSprite = pygame.sprite.RenderPlain((player))
enemySprites = pygame.sprite.RenderPlain(())
if lvl2 == False:
enemiestocreat = int(float(enemiesset))
while enemiestocreat != 0:
enemySprites.add(Enemy(enemiestocreat*50))
enemiestocreat -= 1
elif lvl2 == True:
enemiesset = int(float(enemiesset)) * 2
enemiestocreat = enemiesset
while enemiestocreat != 0:
enemySprites.add(Enemy(enemiestocreat*50))
enemiestocreat -= 1
laserSprites = pygame.sprite.RenderPlain(())
enemyExplosion = pygame.sprite.RenderPlain(())
playerExplosion = pygame.sprite.RenderPlain(())
explosionSprites = pygame.sprite.RenderPlain(())
# Main Loop
global gameover, enemydead
while gameover == False:
clock.tick(60)
global lives
font = pygame.font.Font(None,36)
text1 = font.render("Lives:" + str(lives + 1), 1, (250,250,250))
textpos1 = text1.get_rect()
textpos1.centerx = 750
textpos1.centery = 590
global enemieskilled
text2 = font.render("Score: " + str(enemieskilled), 1, (250,250,250))
textpos2 = text2.get_rect()
textpos2.centerx = 55
textpos2.centery = 590
if int(float(enemiesset)) == enemydead:
lvl2 = True
enemydead = 0
lvl2src()
for event in pygame.event.get():
if event.type == KEYDOWN and event.key == K_ESCAPE:
main()
# Update
i += 1
space1.update(i)
space2.update()
player.update()
enemySprites.update()
laserSprites.update()
enemyExplosion.update()
playerExplosion.update()
explosionSprites.update()
screen.blit(background, (0, 0))
# Draw
space1.draw(screen)
space2.draw(screen)
playerSprite.draw(screen)
enemySprites.draw(screen)
laserSprites.draw(screen)
enemyExplosion.draw(screen)
playerExplosion.draw(screen)
explosionSprites.draw(screen)
screen.blit(text1, textpos1)
screen.blit(text2, textpos2)
pygame.display.flip()
while gameover == True:
gameoversrc()
这是我的功能，我可以检测到英雄是否被击中：
class Enemy(pygame.sprite.Sprite):
def __init__(self, centerx):
global level
if level%2: #choosing which lecturer depending on the modulus of the level
pygame.sprite.Sprite.__init__(self)
self.image, self.rect = load_image("fse.png", -1)
self.rect = self.image.get_rect()
self.dy = 8
self.reset()
elif level%3:
pygame.sprite.Sprite.__init__(self)
self.image, self.rect = load_image("aps.png", -1)
self.rect = self.image.get_rect()
self.dy = 8
self.reset()
else:
pygame.sprite.Sprite.__init__(self)
self.image, self.rect = load_image("ust.png", -1)
self.rect = self.image.get_rect()
self.dy = 8
self.reset()
def update(self):
self.rect.centerx += self.dx
self.rect.centery += self.dy
#checking if enemies are outside scrren
if self.rect.top > 600:
self.reset()
# Laser Collisions
if pygame.sprite.groupcollide(enemySprites, laserSprites, 1, 1):
explosionSprites.add(EnemyExplosion(self.rect.center))
# Ship Collisions
if pygame.sprite.groupcollide(playerSprite, enemySprites, 0, 1):
global lives
if lives == 0:
explosionSprites.add(PlayerExplosion(self.rect.center))
elif lives != 0:
explosionSprites.add(EnemyExplosion(self.rect.center))
lives -= 1
#randome movement of enemies
def reset(self):
self.rect.bottom = 0
self.rect.centerx = random.randrange(0, 800)
self.dy = random.randrange(5, 10)
self.dx = random.randrange(-2, 2)
答案 0 :(得分：3)
一个简单的解决方案是不直接绘制到屏幕Surface，而是绘制到临时Surface。然后将临时Surface blit到屏幕Surface。
如果您想摇动屏幕，只需在blitting时将偏移应用于临时Surface的位置。
要生成该偏移量，您可以使用generator function。
这是一个完整的例子。请注意如果玩家被落石击中，屏幕会如何震动。
import pygame
from random import randint
from itertools import repeat
pygame.init()
org_screen = pygame.display.set_mode((400, 400))
screen = org_screen.copy()
screen_rect = screen.get_rect()
player = pygame.Rect(180, 180, 20, 20)
def get_rock():
return pygame.Rect(randint(0, 340), 0, 60, 60)
falling = get_rock()
clock = pygame.time.Clock()
# 'offset' will be our generator that produces the offset
# in the beginning, we start with a generator that
# yields (0, 0) forever
offset = repeat((0, 0))
# this function creates our shake-generator
# it "moves" the screen to the left and right
# three times by yielding (-5, 0), (-10, 0),
# ... (-20, 0), (-15, 0) ... (20, 0) three times,
# then keeps yieling (0, 0)
def shake():
s = -1
for _ in xrange(0, 3):
for x in range(0, 20, 5):
yield (x*s, 0)
for x in range(20, 0, 5):
yield (x*s, 0)
s *= -1
while True:
yield (0, 0)
while True:
if pygame.event.get(pygame.QUIT): break
pygame.event.pump()
keys = pygame.key.get_pressed()
if keys[pygame.K_w]: player.move_ip(0, -2)
if keys[pygame.K_a]: player.move_ip(-2, 0)
if keys[pygame.K_s]: player.move_ip(0, 2)
if keys[pygame.K_d]: player.move_ip(2, 0)
player.clamp_ip(screen_rect)
falling.move_ip(0, 4)
org_screen.fill((0, 0, 0))
screen.fill((255,255,255))
pygame.draw.rect(screen, (0,0,0), player)
pygame.draw.rect(screen, (255,0,0), falling)
if player.colliderect(falling):
# if the player is hit by the rock,
# we create a new shake-generator
offset = shake()
falling = get_rock()
if not screen_rect.contains(falling):
falling = get_rock()
clock.tick(100)
# here we draw our temporary surface to the
# screen using the offsets created by the
# generators.
org_screen.blit(screen, next(offset))
pygame.display.flip()
答案 1 :(得分：0)
对于使用 Pyscroll 库（支持滚动地图和其他一些功能）的任何人，您都可以通过在 scroll 上使用您选择的偏移量调用 BufferedRenderer 来实现这一点。
示例：
map_layer.scroll(
(
random.randint(0, your_offset),
random.randint(0, your_offset)
)
)