版权声明：转载请标明出处 https://blog.csdn.net/qq_41556318/article/details/85996732
现在处于敌强我弱的局面：敌人很多，我只要一个，无处可逃。我们就需要武器来反抗：
定义子弹：
子弹有两种：一种是一次只发射一颗，一种是补给发放的超级子弹，一次可以射2颗子弹。子弹的运动轨迹是直线向上的，速度要略快于飞机的速度，子弹如果超出屏幕范围的话，我们就重新绘制子弹，飞机在哪里，子弹就重新绘制在哪里，击中敌机的时候，子弹也是需要重新绘制的。因此，我们给子弹添加一个 active 属性，来判断子弹是否需要重新绘制，我们单独定义一个 bullet 模块。
#bullet.py
import pygame
class Bullet1(pygame.sprite.Sprite):#普通子弹，一次一发
def __init__(self, position):
pygame.sprite.Sprite.__init__(self)
self.image = pygame.image.load("images/bullet1.png").convert_alpha()
self.rect = self.image.get_rect()
self.rect.left, self.rect.top = position #把飞机机头位置给子弹位置
self.speed = 12
self.active = True
self.mask = pygame.mask.from_surface(self.image) #非透明部分
def move(self):
self.rect.top -= self.speed
if self.rect.top < 0: #射出屏幕外
self.active = False
def reset(self, position):
self.rect.left, self.rect.top = position
self.active = True接下来就需要在main 模块里生成子弹：
# 生成普通子弹
bullet1 = []
bullet1_index = 0
BULLET1_NUM = 4
for i in range(BULLET1_NUM):
bullet1.append(bullet.Bullet1(me.rect.midtop))接下来设置每10帧发射一颗子弹：
# 发射子弹
if not(delay % 10):
bullet1[bullet1_index].reset(me.rect.midtop)
bullet1_index = (bullet1_index + 1) % BULLET1_NUM接下来检测射出去的子弹是否击中敌机，击中的话，敌机和子弹的 active 会设置为 False：
# 检测子弹是否击中敌机
for b in bullet1:
if b.active:
b.move()
screen.blit(b.image, b.rect)
enemy_hit = pygame.sprite.spritecollide(b, enemies, False, pygame.sprite.collide_mask)
if enemy_hit:
b.active = False
for e in enemy_hit:
e.active = False到目前为止，这样我们基本上就战无不胜了。无论是中型敌机还是大型敌机，我们直接一枪就把它秒杀了，这就显得敌机太弱了吧。
因此，我们给中型敌机和大型敌机添加一个 energy 的属性，显示还有多少生命值。
然后，我们就来修改main 模块，每当中大型敌机被子弹击中的时候，我们先将其enery 属性的值减1，减到为0时，才让敌机坠机。
# 检测子弹是否击中敌机
for b in bullet1:
if b.active:
b.move()
screen.blit(b.image, b.rect)
enemy_hit = pygame.sprite.spritecollide(b, enemies, False, pygame.sprite.collide_mask)
if enemy_hit:
b.active = False
for e in enemy_hit:
if e in mid_enemies or e in big_enemies:
e.energy -= 1
if e.energy == 0:
e.active = False
else: #是小型敌机
e.active = False我们还可以为中大型敌机增加血槽的显示功能，这样子可以更直观的让玩家知道敌机还剩多少生命值，
所以我们在绘制中大型敌机这里就需要进行修改了：
#绘制大型敌机
for each in big_enemies:
if each.active: #检测是否还活着
each.move()
if switch_image:
screen.blit(each.image1, each.rect)
else:
screen.blit(each.image2, each.rect)
# 绘制血槽
pygame.draw.line(screen, BLACK, \
(each.rect.left, each.rect.top - 5), \
(each.rect.right, each.rect.top - 5), \
2)
# 当生命大于20%显示绿色，否则显示红色
energy_remain = each.energy / enemy.BigEnemy.energy
if energy_remain > 0.2:
energy_color = GREEN
else:
energy_color = RED
pygame.draw.line(screen, energy_color, \
(each.rect.left, each.rect.top - 5), \
(each.rect.left + each.rect.width * energy_remain, \
each.rect.top - 5),
2)
#即将出现在界面中，播放音效
if each.rect.bottom == -50:
enemy3_fly_sound.play(-1) #循环播放
else:
#坠机
if not(delay % 3):
if e3_destroy_index == 0:
enemy3_down_sound.play()
screen.blit(each.destroy_images[e3_destroy_index], each.rect)
e3_destroy_index = (e3_destroy_index + 1) % 6
if e3_destroy_index == 0:
enemy3_fly_sound.stop() #循环音效停止播放
each.reset()
#绘制中型敌机
for each in mid_enemies:
if each.active: #检测是否还活着
each.move()
screen.blit(each.image, each.rect)
# 绘制血槽
pygame.draw.line(screen, BLACK, \
(each.rect.left, each.rect.top - 5), \
(each.rect.right, each.rect.top - 5), \
2)
# 当生命大于20%显示绿色，否则显示红色
energy_remain = each.energy / enemy.MidEnemy.energy
if energy_remain > 0.2:
energy_color = GREEN
else:
energy_color = RED
pygame.draw.line(screen, energy_color, \
(each.rect.left, each.rect.top - 5), \
(each.rect.left + each.rect.width * energy_remain, \
each.rect.top - 5), 2)
else:
#坠机
if not(delay % 3):
if e2_destroy_index == 0:
enemy2_down_sound.play() #音效
screen.blit(each.destroy_images[e2_destroy_index], each.rect)
e2_destroy_index = (e2_destroy_index + 1) % 4
if e2_destroy_index == 0:
each.reset()
就目前而言，我们是成功了。
当中型敌机和大型敌机被子弹击中时，但不至于坠机时，这时候应该是要有特效的。
我们现在 enemy 模块中增加特效的图片，并且增加一个用于检测是否被击中的 hit 属性。
然后我们在子弹击中中型或大型飞机时，将hit 属性的值改为True
然后再绘制中型或大型飞机时，就需要根据hit 作调整。
#绘制大型敌机
for each in big_enemies:
if each.active: #检测是否还活着
each.move()
if each.hit:
#绘制被击中的特效
screen.blit(each.image_hit, each.rect)
each.hit = False
else:
if switch_image:
screen.blit(each.image1, each.rect)
else:
screen.blit(each.image2, each.rect)
#（省略部分代码不显示）
#绘制中型敌机
for each in mid_enemies:
if each.active: #检测是否还活着
each.move()
if each.hit:
#绘制被击中的特效
screen.blit(each.image_hit, each.rect)
each.hit = False
else:
screen.blit(each.image, each.rect)这节课实现的完整代码如下：
#main.py
import pygame
import sys
import traceback #为了更好地退出
import myplane
import enemy
import bullet
from pygame.locals import *
pygame.init()
pygame.mixer.init() #混音器初始化
bg_size = width, height = 480, 700
screen = pygame.display.set_mode(bg_size)
pygame.display.set_caption("飞机大战 -- Python Demo")
background = pygame.image.load("images/background.png").convert()
#生成一些颜色
BLACK = (0, 0, 0)
GREEN = (0, 255, 0)
RED = (255, 0, 0)
# 载入游戏音乐
pygame.mixer.music.load("sound/game_music.ogg")
pygame.mixer.music.set_volume(0.2)
bullet_sound = pygame.mixer.Sound("sound/bullet.wav")
bullet_sound.set_volume(0.2)
bomb_sound = pygame.mixer.Sound("sound/use_bomb.wav")
bomb_sound.set_volume(0.2)
supply_sound = pygame.mixer.Sound("sound/supply.wav")
supply_sound.set_volume(0.2)
get_bomb_sound = pygame.mixer.Sound("sound/get_bomb.wav")
get_bomb_sound.set_volume(0.2)
get_bullet_sound = pygame.mixer.Sound("sound/get_bullet.wav")
get_bullet_sound.set_volume(0.2)
upgrade_sound = pygame.mixer.Sound("sound/upgrade.wav")
upgrade_sound.set_volume(0.2)
enemy3_fly_sound = pygame.mixer.Sound("sound/enemy3_flying.wav")
enemy3_fly_sound.set_volume(0.5)
enemy1_down_sound = pygame.mixer.Sound("sound/enemy1_down.wav")
enemy1_down_sound.set_volume(0.2)
enemy2_down_sound = pygame.mixer.Sound("sound/enemy2_down.wav")
enemy2_down_sound.set_volume(0.2)
enemy3_down_sound = pygame.mixer.Sound("sound/enemy3_down.wav")
enemy3_down_sound.set_volume(0.5)
me_down_sound = pygame.mixer.Sound("sound/me_down.wav")
me_down_sound.set_volume(0.2)
def add_small_enemies(group1, group2, num):
for i in range(num):
e1 = enemy.SmallEnemy(bg_size)
group1.add(e1)
group2.add(e1)
def add_mid_enemies(group1, group2, num):
for i in range(num):
e2 = enemy.MidEnemy(bg_size)
group1.add(e2)
group2.add(e2)
def add_big_enemies(group1, group2, num):
for i in range(num):
e3 = enemy.BigEnemy(bg_size)
group1.add(e3)
group2.add(e3)
def main():
pygame.mixer.music.play(-1)
# 生成我方飞机
me = myplane.Myplane(bg_size)
#生成敌方飞机
enemies = pygame.sprite.Group()
# 生成敌方小型飞机
small_enemies = pygame.sprite.Group()
add_small_enemies(small_enemies, enemies, 15)
# 生成敌方中型飞机
mid_enemies = pygame.sprite.Group()
add_mid_enemies(mid_enemies, enemies, 4)
# 生成敌方大型飞机
big_enemies = pygame.sprite.Group()
add_big_enemies(big_enemies, enemies, 2)
# 生成普通子弹
bullet1 = []
bullet1_index = 0
BULLET1_NUM = 4
for i in range(BULLET1_NUM):
bullet1.append(bullet.Bullet1(me.rect.midtop)) #me.rect.midtop：机头位置
clock = pygame.time.Clock()
#中弹图片索引
e1_destroy_index = 0
e2_destroy_index = 0
e3_destroy_index = 0
me_destroy_index = 0
#用于切换图片
switch_image = True
#用于延迟
delay = 100
running = True
while running:
for event in pygame.event.get():
if event.type == QUIT:
pygame.quit()
sys.exit()
#检测用户的键盘操作
key_pressed = pygame.key.get_pressed()
if key_pressed[K_w] or key_pressed[K_UP]:
me.moveUp()
if key_pressed[K_s] or key_pressed[K_DOWN]:
me.moveDown()
if key_pressed[K_a] or key_pressed[K_LEFT]:
me.moveLeft()
if key_pressed[K_d] or key_pressed[K_RIGHT]:
me.moveRight()
screen.blit(background, (0, 0))
# 发射子弹
if not(delay % 10):
bullet1[bullet1_index].reset(me.rect.midtop)
bullet1_index = (bullet1_index + 1) % BULLET1_NUM
# 检测子弹是否击中敌机
for b in bullet1:
if b.active:
b.move()
screen.blit(b.image, b.rect)
enemy_hit = pygame.sprite.spritecollide(b, enemies, False, pygame.sprite.collide_mask)
if enemy_hit:
b.active = False
for e in enemy_hit:
if e in mid_enemies or e in big_enemies:
e.hit = True
e.energy -= 1
if e.energy == 0:
e.active = False
else:#是小型敌机
e.active = False
#绘制大型敌机
for each in big_enemies:
if each.active: #检测是否还活着
each.move()
if each.hit:
#绘制被击中的特效
screen.blit(each.image_hit, each.rect)
each.hit = False
else:
if switch_image:
screen.blit(each.image1, each.rect)
else:
screen.blit(each.image2, each.rect)
# 绘制血槽
pygame.draw.line(screen, BLACK, \
(each.rect.left, each.rect.top - 5), \
(each.rect.right, each.rect.top - 5), \
2)
# 当生命大于20%显示绿色，否则显示红色
energy_remain = each.energy / enemy.BigEnemy.energy
if energy_remain > 0.2:
energy_color = GREEN
else:
energy_color = RED
pygame.draw.line(screen, energy_color, \
(each.rect.left, each.rect.top - 5), \
(each.rect.left + each.rect.width * energy_remain, \
each.rect.top - 5),
2)
#即将出现在界面中，播放音效
if each.rect.bottom == -50:
enemy3_fly_sound.play(-1) #循环播放
else:
#坠机
if not(delay % 3):
if e3_destroy_index == 0:
enemy3_down_sound.play()
screen.blit(each.destroy_images[e3_destroy_index], each.rect)
e3_destroy_index = (e3_destroy_index + 1) % 6
if e3_destroy_index == 0:
enemy3_fly_sound.stop() #循环音效停止播放
each.reset()
#绘制中型敌机
for each in mid_enemies:
if each.active: #检测是否还活着
each.move()
if each.hit:
#绘制被击中的特效
screen.blit(each.image_hit, each.rect)
each.hit = False
else:
screen.blit(each.image, each.rect)
# 绘制血槽
pygame.draw.line(screen, BLACK, \
(each.rect.left, each.rect.top - 5), \
(each.rect.right, each.rect.top - 5), \
2)
# 当生命大于20%显示绿色，否则显示红色
energy_remain = each.energy / enemy.MidEnemy.energy
if energy_remain > 0.2:
energy_color = GREEN
else:
energy_color = RED
pygame.draw.line(screen, energy_color, \
(each.rect.left, each.rect.top - 5), \
(each.rect.left + each.rect.width * energy_remain, \
each.rect.top - 5), 2)
else:
#坠机
if not(delay % 3):
if e2_destroy_index == 0:
enemy2_down_sound.play() #音效
screen.blit(each.destroy_images[e2_destroy_index], each.rect)
e2_destroy_index = (e2_destroy_index + 1) % 4
if e2_destroy_index == 0:
each.reset()
#绘制小型敌机
for each in small_enemies:
if each.active: #检测是否还活着
each.move()
screen.blit(each.image, each.rect)
else:
#坠机
if not(delay % 3):
if e1_destroy_index == 0:
enemy1_down_sound.play() #音效
screen.blit(each.destroy_images[e1_destroy_index], each.rect)
e1_destroy_index = (e1_destroy_index + 1) % 4
if e1_destroy_index == 0:
each.reset()
#检测我方飞机是否被撞
enemies_down = pygame.sprite.spritecollide(me, enemies, False, pygame.sprite.collide_mask)
if enemies_down:
#me.active = False
for e in enemies_down:
e.active = False
#绘制我方飞机
if me.active: #检测是否还活着
if switch_image:
screen.blit(me.image1, me.rect)
else:
screen.blit(me.image2, me.rect)
else:
#坠机
if not(delay % 3):
if me_destroy_index == 0:
me_down_sound.play()
screen.blit(me.destroy_images[me_destroy_index], me.rect)
me_destroy_index = (me_destroy_index + 1) % 4
if me_destroy_index == 0:
print("game over")
running = False
#切换图片
if not(delay % 5): #5帧切换一次，一秒就只切换12次
switch_image = not switch_image
delay -= 1
if not delay:
delay = 100
pygame.display.flip()
clock.tick(60)
if __name__ == "__main__":
try:
main()
except SystemExit:
pass
except:
traceback.print_exc()
pygame.quit()
input()#myplane.py
import pygame
class Myplane(pygame.sprite.Sprite):
def __init__(self, bg_size):
pygame.sprite.Sprite.__init__(self)
self.image1 = pygame.image.load("images/me1.png").convert_alpha()
self.image2 = pygame.image.load("images/me2.png").convert_alpha()
#添加坠机图片
self.destroy_images = []
self.destroy_images.extend([\
pygame.image.load("images/me_destroy_1.png").convert_alpha(), \
pygame.image.load("images/me_destroy_2.png").convert_alpha(), \
pygame.image.load("images/me_destroy_3.png").convert_alpha(), \
pygame.image.load("images/me_destroy_4.png").convert_alpha() \
])
self.rect = self.image1.get_rect()
self.width, self.height = bg_size[0], bg_size[1]
self.rect.left, self.rect.top = \
(self.width - self.rect.width) // 2, \
self.height - self.rect.height - 60 #减60，留给状态栏
self.speed = 10
self.active = True
self.mask = pygame.mask.from_surface(self.image1) #将非透明部分标记为mask
def moveUp(self):
if self.rect.top > 0:
self.rect.top -= self.speed
else:
self.rect.top = 0
def moveDown(self):
if self.rect.bottom < self.height - 60:
self.rect.top += self.speed
else:
self.rect.bottom = self.height - 60
def moveLeft(self):
if self.rect.left > 0:
self.rect.left -= self.speed
else:
self.rect.left = 0
def moveRight(self):
if self.rect.right < self.width:
self.rect.left += self.speed
else:
self.rect.right = self.width#enemy.py
import pygame
from random import *
class SmallEnemy(pygame.sprite.Sprite):
def __init__(self, bg_size):
pygame.sprite.Sprite.__init__(self)
self.image = pygame.image.load("images/enemy1.png").convert_alpha()
#添加坠机图片
self.destroy_images = []
self.destroy_images.extend([\
pygame.image.load("images/enemy1_down1.png").convert_alpha(), \
pygame.image.load("images/enemy1_down2.png").convert_alpha(), \
pygame.image.load("images/enemy1_down3.png").convert_alpha(), \
pygame.image.load("images/enemy1_down4.png").convert_alpha() \
])
self.rect = self.image.get_rect()
self.width, self.height = bg_size[0], bg_size[1]
self.speed = 2
self.active = True
self.rect.left, self.rect.top = \
randint(0, self.width - self.rect.width), \
randint(-5 * self.height, 0) #在页面外部上方5个屏幕高度范围内随机生成一个敌机
self.mask = pygame.mask.from_surface(self.image) #将非透明部分标记为mask
def move(self):
if self.rect.top < self.height:
self.rect.top += self.speed
else:
self.reset()
def reset(self):
self.active = True
self.rect.left, self.rect.top = \
randint(0, self.width - self.rect.width), \
randint(-5 * self.height, 0)
class MidEnemy(pygame.sprite.Sprite):
energy = 8
def __init__(self, bg_size):
pygame.sprite.Sprite.__init__(self)
self.image = pygame.image.load("images/enemy2.png").convert_alpha()
self.image_hit = pygame.image.load("images/enemy2_hit.png").convert_alpha()#中弹图片
#添加坠机图片
self.destroy_images = []
self.destroy_images.extend([\
pygame.image.load("images/enemy2_down1.png").convert_alpha(), \
pygame.image.load("images/enemy2_down2.png").convert_alpha(), \
pygame.image.load("images/enemy2_down3.png").convert_alpha(), \
pygame.image.load("images/enemy2_down4.png").convert_alpha() \
])
self.rect = self.image.get_rect()
self.width, self.height = bg_size[0], bg_size[1]
self.speed = 1
self.active = True
self.rect.left, self.rect.top = \
randint(0, self.width - self.rect.width), \
randint(-10 * self.height, -self.height) #在页面外部上方1个到10个屏幕高度范围内随机生成一个敌机（1-10个，就保证了不会一开始出大一个大的）
self.mask = pygame.mask.from_surface(self.image) #将非透明部分标记为mask
self.energy = MidEnemy.energy
self.hit = False #检测是否被击中的属性
def move(self):
if self.rect.top < self.height:
self.rect.top += self.speed
else:
self.reset()
def reset(self):
self.active = True
self.enery = MidEnemy.energy
self.rect.left, self.rect.top = \
randint(0, self.width - self.rect.width), \
randint(-10 * self.height, -self.height)
class BigEnemy(pygame.sprite.Sprite):
energy = 20
def __init__(self, bg_size):
pygame.sprite.Sprite.__init__(self)
#大型敌机有飞行特效，两张图片切换
self.image1 = pygame.image.load("images/enemy3_n1.png").convert_alpha()
self.image2 = pygame.image.load("images/enemy3_n2.png").convert_alpha()
self.image_hit = pygame.image.load("images/enemy3_hit.png").convert_alpha()#中弹图片
#添加坠机图片
self.destroy_images = []
self.destroy_images.extend([\
pygame.image.load("images/enemy3_down1.png").convert_alpha(), \
pygame.image.load("images/enemy3_down2.png").convert_alpha(), \
pygame.image.load("images/enemy3_down3.png").convert_alpha(), \
pygame.image.load("images/enemy3_down4.png").convert_alpha(), \
pygame.image.load("images/enemy3_down5.png").convert_alpha(), \
pygame.image.load("images/enemy3_down6.png").convert_alpha() \
])
self.rect = self.image1.get_rect()
self.width, self.height = bg_size[0], bg_size[1]
self.speed = 1
self.active = True
self.rect.left, self.rect.top = \
randint(0, self.width - self.rect.width), \
randint(-15 * self.height, -5 * self.height) #在页面外部上方5-15个屏幕高度范围内随机生成一个敌机
self.mask = pygame.mask.from_surface(self.image1) #将非透明部分标记为mask
self.energy = BigEnemy.energy
self.hit = False #检测是否被击中的属性
def move(self):
if self.rect.top < self.height:
self.rect.top += self.speed
else:
self.reset()
def reset(self):
self.active = True
self.enery = BigEnemy.energy
self.rect.left, self.rect.top = \
randint(0, self.width - self.rect.width), \
randint(-15 * self.height, -5 * self.height)#bullet.py
import pygame
class Bullet1(pygame.sprite.Sprite):#普通子弹，一次一发
def __init__(self, position):
pygame.sprite.Sprite.__init__(self)
self.image = pygame.image.load("images/bullet1.png").convert_alpha()
self.rect = self.image.get_rect()
self.rect.left, self.rect.top = position #把飞机机头位置给子弹位置
self.speed = 12
self.active = True
self.mask = pygame.mask.from_surface(self.image) #非透明部分
def move(self):
self.rect.top -= self.speed
if self.rect.top < 0: #射出屏幕外
self.active = False
def reset(self, position):
self.rect.left, self.rect.top = position
self.active = True（未完待续）