我正在制作类似于《太空侵略者》的游戏。有没有一种方法可以检查事件的发生，例如减少拍摄频率？现在，如果您足够快地按空格键，则最先拍摄的照片会在到达屏幕顶部之前消失。我想知道您是否可以检查2 /（最高得分需要多长时间）这样的铅球比赛。
这是我的代码：
#-----!!!!SPACE INVADERS!!!!-----
import pygame, sys
from pygame.locals import *
#-----MAIN FUNCTIONS-----
def movement(move_x):
if event.type == KEYDOWN:
if event.key == K_LEFT:
move_x = -5
if event.key == K_RIGHT:
move_x = 5
if event.type == KEYUP:
if event.key == K_LEFT:
move_x = 0
if event.key == K_RIGHT:
move_x = 0
return move_x
#-----FFRAME RAEE / SCREEN SIZE-----
clock = pygame.time.Clock()
w,h = 800,800
screen = pygame.display.set_mode((w,h))
#-----SETTING IMAGES-----
pygame.mouse.set_visible(0)
ship = pygame.image.load("spaceship.png")
ship = pygame.transform.scale(ship,(100,50))
ship_top = screen.get_height() - ship.get_height()
ship_left = screen.get_width()/2 - ship.get_width()/2
screen.blit(ship, (ship_left,ship_top))
shot1 = pygame.image.load("SingleBullet.png")
shot1 = pygame.transform.scale(shot1,(25,25))
shot2 = shot1
shot_count = 0
shot_y = 0
shot_y_2 = 0
#-----GLOBAL VARIABLES-----
x = 0
resetShot = 0
move_x = 0
#-----MAIN GAME LOOP-----
while True:
clock.tick(60)
screen.fill((0,0,0))
#x,y = pygame.mouse.get_pos()
screen.blit(ship, (x-ship.get_width()/2,ship_top))
for event in pygame.event.get():
if event.type == pygame.QUIT:
sys.exit()
move_x = movement(move_x)
if event.type == KEYDOWN:
if event.key == K_SPACE and shot_count == 0:
shot_y = h-50
shot_x = x
elif event.type == K_SPACE and shot_count == 1:
shot_y_2 = h-50
shot_x_2 = x
print(h, ' ', shot_y, shot_count)
if event.type == KEYUP:
if event.key == K_SPACE and shot_count == 0:
resetShot = 0
elif event.type == K_SPACE and shot_count == 1:
resetShot = 0
if shot_y > 0:
screen.blit(shot1, (shot_x-shot1.get_width()/2,shot_y))
shot_y -= 15
if shot_y_2 > 0:
screen.blit(shot2, (shot_x_2-shot1.get_width()/2,shot_y_2))
shot_y_2 -= 15
x+=move_x
pygame.display.update()
最佳答案
您可以使用计数器对自上次射击以来的主循环中的循环进行计数-如果它大于（例如）大于清除计数器并进行射击的10次-在更复杂的游戏中，您可以使用pygame.time.get_ticks()计数自上次射击以来的时间（以毫秒为单位）
另一种方法是仅在屏幕上少于2张的情况下才开火。
编辑：
您的代码看起来像这样-简单的示例。使用键：左，右，空格，P（用于暂停）。
还有很多事情要做。例如更好的碰撞检测-pygame.sprite.collide_rect()
（我在末尾附加了位图）
#-----!!!!SPACE INVADERS!!!!-----
import pygame
from pygame.locals import *
#----------------------------------------------------------------------
class Ship():
def __init__(self, screen_rect):
#self.image = pygame.image.load("spaceship.png")
self.image = pygame.image.load("ball1.png")
self.image = pygame.transform.scale(self.image, (100,50))
self.rect = self.image.get_rect()
# put ship bottom, center x
self.rect.bottom = screen_rect.bottom
self.rect.centerx = screen_rect.centerx
self.move_x = 0
self.shots = []
self.shots_count = 0
self.max_shots = 2
#--------------------
def event_handler(self, event):
#print "debug: Ship.event_handler"
if event.type == KEYDOWN:
if event.key == K_LEFT:
self.move_x = -5
elif event.key == K_RIGHT:
self.move_x = 5
elif event.key == K_SPACE:
if len(self.shots) < self.max_shots:
self.shots.append(Bullet(self.rect.centerx, self.rect.top))
if event.type == KEYUP:
if event.key in (K_LEFT, K_RIGHT):
self.move_x = 0
def update(self):
#print "debug: Ship.update: move_x", self.move_x
self.rect.x += self.move_x
for s in self.shots:
s.update()
for i in range(len(self.shots)-1, -1, -1):
print "debug: Ship.update: testing bullet ", i
if not self.shots[i].is_alive:
print "debug: Ship.update: removing bullet ", i
del self.shots[i]
#--------------------
def draw(self, screen):
#print "debug: Ship.draw"
screen.blit(self.image, self.rect.topleft)
for s in self.shots:
s.draw(screen)
def bullet_detect_collison(self, enemy_list):
for s in self.shots:
for e in enemy_list:
if pygame.sprite.collide_circle(s, e):
s.is_alive = False
e.is_alive = False
#----------------------------------------------------------------------
class Bullet():
def __init__(self, x, y):
#self.image = pygame.image.load("SingleBullet.png")
self.image = pygame.image.load("ball2.png")
self.image = pygame.transform.scale(self.image, (25,25))
self.rect = self.image.get_rect()
self.rect.centerx = x
self.rect.centery = y
self.is_alive = True
#--------------------
def update(self):
self.rect.y -= 15
if self.rect.y < 0:
self.is_alive = False
#--------------------
def draw(self, screen):
screen.blit(self.image, self.rect.topleft)
#----------------------------------------------------------------------
class Enemy():
def __init__(self, x, y):
self.image = pygame.image.load("ball3.png")
self.rect = self.image.get_rect()
self.rect.centerx = x
self.rect.centery = y
self.is_alive = True
#--------------------
def update(self):
self.rect.y += 1
#~ if self.rect.y < 0:
#~ self.is_alive = False
#--------------------
def draw(self, screen):
screen.blit(self.image, self.rect.topleft)
#----------------------------------------------------------------------
class Game():
def __init__(self):
pygame.init()
w, h = 800, 800
self.screen = pygame.display.set_mode((w,h))
pygame.mouse.set_visible(False)
self.ship = Ship(self.screen.get_rect())
self.enemies = []
for i in range(100, 800, 100):
self.enemies.append(Enemy(i, 100))
font = pygame.font.SysFont("", 72)
self.text_paused = font.render("PAUSED", True, (255, 0, 0))
self.text_paused_rect = self.text_paused.get_rect(center=self.screen.get_rect().center)
#-----MAIN GAME LOOP-----
def run(self):
clock = pygame.time.Clock()
RUNNING = True
PAUSED = False
while RUNNING:
clock.tick(30)
#--- events ---
for event in pygame.event.get():
if event.type == pygame.QUIT:
RUNNING = False
if event.type == KEYDOWN:
if event.key == K_ESCAPE:
RUNNING = False
if event.key == K_p:
PAUSED = not PAUSED
if not PAUSED:
self.ship.event_handler(event)
#--- changes ---
if not PAUSED:
self.ship.update()
for e in self.enemies:
e.update()
self.ship.bullet_detect_collison(self.enemies)
for i in range(len(self.enemies)-1, -1, -1):
print "debug: Ship.update: testing bullet ", i
if not self.enemies[i].is_alive:
print "debug: Ship.update: removing bullet ", i
del self.enemies[i]
#--- draws ---
self.screen.fill((0,0,0))
self.ship.draw(self.screen)
for e in self.enemies:
e.draw(self.screen)
if PAUSED:
self.screen.blit(self.text_paused, self.text_paused_rect)
pygame.display.update()
#--- quit ---
pygame.quit()
#---------------------------------------------------------------------
Game().run()
ball1.png
ball2.png
ball3.png
屏幕截图
关于python - 太空侵略者项目，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/19966094/