我如何在游戏中随机拍摄敌人？

Question

因此，我目前正在尝试创建太空入侵者，并且我正在尝试随机地向玩家拍摄外星人。我已经做到了，以便向玩家射击一个弹丸或敌人的错误，但是我不知道如何从外星人所在的随机位置进行这种情况，以及我如何使敌人反复射击导弹，而不是像现在这样做一次。我正在使用的代码下方（与敌人射击有关的变量是敌人大火和敌人）。...

import pygame
import sys
import time

#initialize pygame
pygame.init()
width = 800
height = 600
# set the size for the surface (screen)

screen = pygame.display.set_mode((width, height),pygame.FULLSCREEN)
width = screen.get_width()
height = screen.get_height()
print(width)
print(height)
# set the caption for the screen
pygame.display.set_caption("Space Invaders")




def checkCollision(missles, type, score):
    for missle in missles:
      collision = missle.collidelist((type))
      if collision > -1:
        type.pop(collision) 
        missles.remove(missle)
      missle.move_ip(0,missleSpeed)
      pygame.draw.rect(screen, WHITE, missle,0)

# define colours  you will be using
WHITE = (255,255,255)
GREEN = (0,255,0)
RED = (255,0,0)
BLUE = (0,0,255)
BLACK = (0,0,0)
YELLOW = (255,255,0)



clock = pygame.time.Clock()
FPS = 60
s = 25
#load and scale images
smallInvaderImg = pygame.image.load("images/smallinvader.png")
smallInvaderImg = pygame.transform.scale(smallInvaderImg,(s,s))
medInvaderImg = pygame.image.load("images/crabinvader.png")
medInvaderImg = pygame.transform.scale(medInvaderImg, (s,s))
bigInvaderImg = pygame.image.load("images/biginvader.png")
bigInvaderImg = pygame.transform.scale(bigInvaderImg, (s,s))
shipImg = pygame.image.load("images/ship.png")
shipImg = pygame.transform.scale(shipImg, (60,60))

smallInvaders = []
medInvaders = []
bigInvaders = []
enemiesMap = ["sssssssssss",
             "mmmmmmmmmmm",
             "mmmmmmmmmmm",
           "bbbbbbbbbbb"]
invadertype = [smallInvaders,medInvaders,bigInvaders]
dx = 1
dy = 0
x = 240
y = 0
gap = 10
for element in enemiesMap:
  for char in element:
    if char == "s":
      smallInvaders.append(pygame.Rect(x,y,s,s))
    elif char == "m":
      medInvaders.append(pygame.Rect(x,y,s,s))
    elif char == "b":
      bigInvaders.append(pygame.Rect(x,y,s,s))
    x += s + gap 
  y += s + gap  
  x = 240

score = 2


ship = pygame.Rect(width/2,525,60,60)

if ship.right == width:   
  ship.right = width

#missles
maxMissles = 3
missleSpeed = -6
missleWidth = 5
missleHeight = 30
enemmissleWidth = 5
enemmissleHeight = 25
missles = []
missleFired = False
lives = 3

playbutton = pygame.Rect(width/2,height/2,155,90)
playbutton.center = (width/2,height/2)
quitbutton = pygame.Rect(width/2,height/2,155,90)
quitbutton.center = (width/2,height/2+110)
playagn = pygame.Rect(width/2,height/2,155,90)
playagn.center = (width/2,height/2)

playword = pygame.font.SysFont("comicsanms", 35)
title = pygame.font.SysFont("comicsanms", 90)
quitword = pygame.font.SysFont("comicsanms",35)
endscreen = pygame.font.SysFont("comicsanms", 90)
playagaintext = pygame.font.SysFont("comicsanms", 35)

enemMissleFire = False
enemmislist = []
enemymissles = (pygame.Rect(ship.centerx,y,enemmissleWidth,enemmissleHeight))

invaderDirSwapped = False
screenControl = 0

main = True
while main:
  clock.tick(60)
  for event in pygame.event.get():
     if event.type == pygame.QUIT:
      main = False


  for element in smallInvaders:
    element.move_ip(dx,dy)
    
  for element in smallInvaders:    
    if element.right >= width or element.left <= 0:
      dx *= -1
      invaderDirSwapped = True
     

  for element in medInvaders:
    element.move_ip(dx,dy)

  if not invaderDirSwapped:  
    for element in medInvaders:
      if element.right >= width or element.left <= 0:
        dx *= -1
        invaderDirSwapped = True
     

  for element in bigInvaders:
    element.move_ip(dx,0)

  if not invaderDirSwapped:  
    for element in bigInvaders:
      if element.right >= width or element.left <=0:
        dx *= -1
        invaderDirSwapped = True
      
  


  key_input = pygame.key.get_pressed()
  if key_input[pygame.K_RIGHT] and ship.right < width:
    ship.move_ip(4,0)
  if key_input[pygame.K_LEFT] and ship.left > 0:
    ship.move_ip(-4,0)
  if key_input[pygame.K_SPACE] and not missleFired:
    missleFired = True
    missles.append(pygame.Rect(ship.centerx,ship.top,missleWidth,missleHeight))
  
  if screenControl == 0:
    screen.fill(BLACK)
    
    texttitle = title.render("SPACE INVADERS", True, WHITE)
    textrect = texttitle.get_rect()
    textrect.center = (width/2, 100)
    screen.blit(texttitle,textrect)

    
    if playbutton.collidepoint(pygame.mouse.get_pos()) and pygame.mouse.get_pressed()[0]:
      screenControl = 1
    pygame.draw.rect(screen,WHITE,(playbutton), 0)

    if playbutton.collidepoint(pygame.mouse.get_pos()):
      pygame.draw.rect(screen,BLUE, (playbutton), 4)

    if quitbutton.collidepoint(pygame.mouse.get_pos()) and pygame.mouse.get_pressed()[0]:
      main = False
    pygame.draw.rect(screen,WHITE,(quitbutton), 0)

    if quitbutton.collidepoint(pygame.mouse.get_pos()):
      pygame.draw.rect(screen,BLUE,quitbutton,4)

    textplay = playword.render("PLAY", True, BLUE)
    textrect2 = textplay.get_rect()
    textrect2.center = (width/2,height/2)
    screen.blit(textplay,textrect2)

    textquit = quitword.render("QUIT",True,BLUE)
    textrect3 = textquit.get_rect()
    textrect3.center = (width/2,height/2+110)
    screen.blit(textquit,textrect3)
  
                           
  if screenControl == 1:
    screen.fill(BLACK)

    if len(missles) > 0:
      if missleFired and missles[-1].bottom < (ship.top - 120) and not key_input[pygame.K_SPACE]:
        missleFired = False
    if len(missles) == 0:
      missleFired = False 
   
    
    if enemMissleFire:
      enemymissles.colliderect(ship)
      enemymissles.move_ip(0,-missleSpeed)
      pygame.draw.rect(screen, WHITE, enemymissles,0)
      
      
    for invader in smallInvaders:
      screen.blit(smallInvaderImg, invader)
    for invader in medInvaders:
      screen.blit(medInvaderImg, invader)
    for invader in bigInvaders:
      screen.blit(bigInvaderImg, invader)
    screen.blit(shipImg,ship)


  
  
  #move and draw missles 

  
  checkCollision(missles,smallInvaders,score)
  checkCollision(missles,medInvaders,score)
  checkCollision(missles,bigInvaders,score)

  if smallInvaders == [] and medInvaders == [] and bigInvaders == []:
    screenControl = 2

  if screenControl == 2:
    screen.fill(BLACK)

    if playagn.collidepoint(pygame.mouse.get_pos()) and pygame.mouse.get_pressed()[0]:
      screenControl = 0
    pygame.draw.rect(screen,WHITE,(playagn),0)

    if quitbutton.collidepoint(pygame.mouse.get_pos()) and pygame.mouse.get_pressed()[0]:
     main = False
    pygame.draw.rect(screen,WHITE, (quitbutton),0)

    if playagn.collidepoint(pygame.mouse.get_pos()):
      pygame.draw.rect(screen,BLUE,(playagn), 4)

    if quitbutton.collidepoint(pygame.mouse.get_pos()):
      pygame.draw.rect(screen,BLUE,(quitbutton),4)
    
    textend = endscreen.render("YOU WON!", True, WHITE)
    textrect4 = textend.get_rect()
    textrect4.center = (width/2, 150)
    screen.blit(textend,textrect4)

    textplayagn = playagaintext.render("PLAY AGAIN", True, BLUE)
    textrect5 = textplayagn.get_rect()
    textrect5.center = (width/2,height/2)
    screen.blit(textplayagn,textrect5)

    textquit = quitword.render("QUIT",True,BLUE)
    textrect3 = textquit.get_rect()
    textrect3.center = (width/2,height/2+110)
    screen.blit(textquit,textrect3)


  pygame.display.update()

不管怎么说，我无法弄清楚我如何制造它，以便可以从随机外星人中拍摄弹丸在球员拍摄过程中，任何帮助都会被施加。

Answer 1

导入随机和时间，

这将获得内置的随机和时间函数，从而

from random import randint as ran
import time

获得数字

，这将获得上一张镜头和下一个

t = ran(Min_Time,Max_Time)

获得倒计时

之间计数第二个

time.sleep(1)
t -= 1
print(t)

之间的时间，这将在数字射击

！拍摄

if t == 0:
print('shot!')

最终代码（小号大张旗鼓）

from random import randint as ran
import time

def randshot(Min_Time,Max_Time):
    t = ran(Min_Time,Max_Time)
    print(t)
    while t:
        time.sleep(1)
        t -= 1
        print(t)
    if t == 0:
        print('shot!')
while True:
    randshot(5,10)

希望这有所帮助！