如何解决我应该怎么做才能创建多个敌人实例？
作为初学者，我正在努力在 pygame 中创建多个敌人。为此，我可以在代码中添加或实现什么？
代码：
# WORK IN PROGRESS!
# I followed techwithtim's tutorial
# I do not own the images and sounds used in game
# Todo Create multiple Enemies
import pygame
import random
# Screen parameters
pygame.init()
screen = pygame.display.set_mode((640,480))
pygame.display.set_caption("SPPACCE")
bg = pygame.image.load("bg.png")
font = pygame.font.SysFont('comicsans',30,True)
clock = pygame.time.Clock()
score = 0
# Music & Sound effects
bulletsound = pygame.mixer.sound('sounds/bullet_soundeffect.wav')
explosion = pygame.mixer.sound('sounds/explosion_effect.wav')
explosion2 = pygame.mixer.sound('sounds/torpedo_explosion.wav')
# Player parameters
class Player(object):
def __init__(self,x,y,height,width):
self.x = x
self.y = y
self.height = height
self.width = width
self.player_vel = 5
def draw(self,screen):
screen.blit(player_char,(self.x,self.y))
# Enemy parameters
class Enemy(object):
def __init__(self,width,end):
self.x = x
self.y = y
self.height = height
self.width = width
self.enemy_vel = 1.5
self.end = end
self.path = [self.x,self.end]
self.hitBox = (self.x + 17,self.y + 2,65,65)
self.health = 5
self.visible = True
def draw(self,screen):
self.move()
if self.visible:
self.hitBox = (self.x + 0,self.y,65)
pygame.draw.rect(screen,(255,0),self.hitBox,2)
screen.blit(enemy_char,self.y))
# Health bars
pygame.draw.rect(screen,(0,(self.hitBox[0],self.hitBox[1] - 20,7))
pygame.draw.rect(screen,65 - (12 * (5 - self.health)),7))
def move(self):
if self.enemy_vel > 0:
if self.x < self.path[1] + self.enemy_vel:
self.x += self.enemy_vel
else:
self.enemy_vel = self.enemy_vel * -1
self.x += self.enemy_vel
else:
if self.x > self.path[0] - self.enemy_vel:
self.x += self.enemy_vel
else:
self.enemy_vel = self.enemy_vel * -1
self.x += self.enemy_vel
def hit(self):
if self.health > 0:
self.health -= 1
else:
self.visible = False
explosion.play()
global score
score += 1
# Player Projectile parameters
class Projectile(object):
def __init__(self,color,radius):
self.x = x
self.y = y
self.color = color
self.radius = radius
self.vel = 12.5
def draw(self,screen):
pygame.draw.circle(screen,self.color,self.y),self.radius)
# Images
player_char = pygame.image.load('sprites/hotdog.png')
enemy_char = pygame.image.load('sprites/hamburger.png')
def blit(): # This draws the sprites
player.draw(screen)
enemy.draw(screen)
for projectile in projectiles:
projectile.draw(screen)
score_text = font.render("score: " + str(score),1,109,255))
version = font.render("Version 01 ",(51,153,255))
screen.blit(score_text,0))
screen.blit(version,(520,0))
shootloop = 0
if shootloop > 0:
shootloop += 1
if shootloop > 2:
shootloop = 0
player = Player(300,400,64,64)
enemy = Enemy(random.randint(10,100),random.randint(20,480)
enemy_count = random.randint(1,10)
projectiles = []
run = True
while run:
clock.tick(60)
screen.fill((0,0))
screen.blit(bg,0))
for event in pygame.event.get():
if event.type == pygame.QUIT:
run = False
# Movement keys with playeborders
keys = pygame.key.get_pressed()
if keys[pygame.K_s] and player.y < 480 - player.height - player.player_vel:
player.y += player.player_vel
if keys[pygame.K_w] and player.y > 280:
player.y -= player.player_vel
if keys[pygame.K_d] and player.x < 640 - player.width - player.player_vel:
player.x += player.player_vel
if keys[pygame.K_a] and player.x > player.player_vel:
player.x -= player.player_vel
for projectile in projectiles:
if projectile.y - projectile.radius < enemy.hitBox[1] + enemy.hitBox[3] and projectile.y + projectile.radius > enemy.hitBox[1]:
if enemy.visible == True:
if projectile.x + projectile.radius > enemy.hitBox[0] and projectile.x - projectile.radius < enemy.hitBox[0] + enemy.hitBox[2]:
enemy.hit()
explosion2.play()
projectiles.pop(projectiles.index(projectile))
if projectile.y < 640 and projectile.y > 0:
projectile.y -= projectile.vel
else:
projectiles.pop(projectiles.index(projectile))
# Player shooting
if keys[pygame.K_SPACE] and shootloop == 0:
if len(projectiles) < 1:
projectiles.append(Projectile(round(player.x + player.width //2),round(player.y + player.height //2),[255,150,0],7))
blit()
pygame.display.update()
我尝试从上一个游戏项目中回收代码，但它不起作用，因为代码结构彼此差异太大。这个项目是OOP的，最后一个有分散的变量。
解决方法
类似于您的 projectiles 列出 Enemy 对象：
enemies = []
enemy_count = random.randint(3,10)
for i in range( enemy_count ):
new_enemy = Enemy(random.randint(10,100),random.randint(20,64,480)
enemies.append( new_enemy )
projectiles = []
更新您的 blit() 以绘制敌人列表：
def blit(): # This draws the sprites
player.draw(screen)
for enemy in enemies:
enemy.draw(screen)
for projectile in projectiles:
projectile.draw(screen)
score_text = font.render("Score: " + str(score),1,(0,109,255))
version = font.render("Version 01 ",(51,153,255))
screen.blit(score_text,0))
screen.blit(version,(520,0))
并检查它们是否有冲突：
for enemy in enemies:
for projectile in projectiles:
if projectile.y - projectile.radius < enemy.hitbox[1] + enemy.hitbox[3] and projectile.y + projectile.radius > enemy.hitbox[1]:
if enemy.visible == True:
if projectile.x + projectile.radius > enemy.hitbox[0] and projectile.x - projectile.radius < enemy.hitbox[0] + enemy.hitbox[2]:
enemy.hit()
explosion2.play()
projectiles.pop(projectiles.index(projectile))
这应该会让你开始。
更改相对简单，因为您已经将数据划分为对象。干得好。
编辑：重新生成敌人只是将另一个 Enemy 对象添加到 enemies 列表的问题：
new_enemy = Enemy(random.randint(10,480)
enemies.append( new_enemy )
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