話不多說，直接上代碼分析……
因爲我們之前在創建己方飛機的時候，沒有對音效和重生的屬性和方法進行定義，所以我們先把這一部分補充完成：
class myPlane(pygame.sprite.Sprite):
def __init__(self,screen,screen_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()
self.mask = pygame.mask.from_surface(self.image1)
self.rect = self.image1.get_rect()
self.width,self.height = screen_size[0],screen_size[1]
self.rect.left,self.rect.bottom = (self.width-self.rect.width)//2, self.height-10
self.screen = screen
self.speed = 10
self.switch_image = True
self.delay = 100
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.active = True
self.down_sound = pygame.mixer.Sound("sound/me_down.wav") # 添加音效
self.down_sound.set_volume(0.2)
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-10:
self.rect.bottom += self.speed
else:
self.rect.bottom = self.height-10
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.right += self.speed
else:
self.rect.right = self.width
def animation(self):
if self.switch_image:
self.screen.blit(self.image1, self.rect)
else:
self.screen.blit(self.image2, self.rect)
if self.delay % 5 == 0:
self.switch_image = not self.switch_image
self.delay -= 1
if self.delay == 0:
self.delay = 100
def time_delay(self): # 作爲整個遊戲動態切換的時鐘
self.delay -= 1
if self.delay == 0:
self.delay = 100
def reset(self): # 添加重生的方法
self.active = True
self.rect.left, self.rect.bottom = (self.width - self.rect.left) // 2, self.height - 10
def play_sound(self): # 播放墜毀音效
self.down_sound.play()
添加音效和重生方法，這邊就不做贅述了，之前敵機講的非常清楚了，下面我們來看下，怎麼實現擊中敵機的判斷，敵機墜毀了又應該做些什麼：
for each in bullet1:
if each.active == True: # 如果子彈沒有飛出界面及擊中飛機
each.move()
screen.blit(each.image, each.rect) # 繪製子彈
enemies_hit = pygame.sprite.spritecollide(each, enemies, False, pygame.sprite.collide_mask) # 檢測子彈與敵機是否發生重疊（即爲擊中）
if enemies_hit: # 如果發生擊中了，enemies就是True
each.active = False # 更改子彈的狀態
for e in enemies_hit:
if e in mid_enemies or e in big_enemies: # 如果擊中的是中型或者大型飛機，那麼就扣血
e.energy -= 1
if e.energy == 0: # 如果血扣完了，那就拜拜了
e.active = False
else: # 如果是小型飛機，那就直接拜拜了
e.active = False
else: # 子彈重生
each.reset(heroPlane.rect.midtop)
到這裏，就可以和上一篇的連起來了，如果發生子彈和敵機重疊的情況，即視爲擊中，那麼就扣血，血扣完了就更改敵機的active，敵機每次首先會判斷敵機的狀態，如果active是True那麼就正常的飛行，反之就觸發擊毀效果，並且重生飛機。
下面我們來看一下，怎麼判斷己方飛機有沒有被敵機擊中：
enemies_collided = pygame.sprite.spritecollide(heroPlane, enemies, False, pygame.sprite.collide_mask) # 一樣的，判斷己方飛機是否和敵機組的飛機產生重合
if enemies_collided: # 如果產生重合那麼就被擊毀了
heroPlane.active = False # 更改己方飛機的狀態
for each in enemies_collided:
each.active = False # 碰撞後，將敵機狀態設置爲False
好了，我們接下來就要實現己方飛機擊毀後血量的顯示和重生了：
# 我們需要在while True前加上下面的代碼
hero_destroy_index = 0 # 擊毀後己方飛機動畫的序號
life_image = pygame.image.load("images/life.png").convert_alpha() # 加載血量的圖片
life_rect = life_image.get_rect() # 獲取血量的rect
life_NUM = 3 # 設置血量爲3
# 在while True裏面，我們要對己方飛機被擊毀後應該做什麼事情進行處理
heroPlane.time_delay() # 運行動態效果時鐘
if heroPlane.active == True: # 判斷己方飛機的狀態
heroPlane.animation() # 如果沒有被擊毀就正常移動
else:
if not (heroPlane.delay % 3): # 做一定的延遲
screen.blit(each.destroy_images[hero_destroy_index], each.rect) # 繪製繪製墜毀的圖片
hero_destroy_index = (hero_destroy_index + 1) % 4 # 更改圖片的序號
if hero_destroy_index == 0: # 如果是最後一張圖片
life_NUM -= 1 # 血量減一
heroPlane.play_sound() # 播放墜毀音效
heroPlane.reset() # 重生飛機
if life_NUM > 0: # 判斷血量是否大於0
# 繪製血量圖片
for i in range(life_NUM):
screen.blit(life_image, (width - 10 - (i + 1) * life_rect.width, height - 10 - life_rect.height))
這樣我們所需要的擊毀效果和生命值的顯示就完成了，看下整體代碼和效果吧！
import pygame
import sys
from pygame.locals import *
import myclass
pygame.init()
screen_size = width, height = 480, 700
screen = pygame.display.set_mode(screen_size)
pygame.display.set_caption('飛機大戰')
bg = pygame.image.load('./images/background.png').convert()
pygame.mixer.music.load('./sound/game_music.ogg')
pygame.mixer.music.set_volume(0.2)
pygame.mixer.music.play(-1)
def add_big_enemies(group1, group2, num):
for big_enemy_num in range(num):
each_big_enemy = myclass.BigEnemy(screen_size)
group1.add(each_big_enemy)
group2.add(each_big_enemy)
def add_mid_enemies(group1, group2, num):
for mid_enemy_num in range(num):
each_mid_enemy = myclass.MidEnemy(screen_size)
group1.add(each_mid_enemy)
group2.add(each_mid_enemy)
def add_small_enemies(group1, group2, num):
for small_enemy_num in range(num):
each_small_enemy = myclass.SmallEnemy(screen_size)
group1.add(each_small_enemy)
group2.add(each_small_enemy)
def main():
clock = pygame.time.Clock()
heroPlane = myclass.myPlane(screen, screen_size)
enemies = pygame.sprite.Group()
big_enemies = pygame.sprite.Group()
add_big_enemies(big_enemies, enemies, 2)
mid_enemies = pygame.sprite.Group()
add_mid_enemies(mid_enemies, enemies, 4)
small_enemies = pygame.sprite.Group()
add_small_enemies(small_enemies, enemies, 15)
bullet1 = []
bullet1_index = 0
BULLET1_NUM = 5
for i in range(BULLET1_NUM):
bullet1.append(myclass.Bullet(heroPlane.rect.midtop, True))
small_destroy_index = 0
mid_destroy_index = 0
big_destroy_index = 0
hero_destroy_index = 0
life_image = pygame.image.load("images/life.png").convert_alpha()
life_rect = life_image.get_rect()
life_NUM = 3
while True:
for event in pygame.event.get():
if event.type == QUIT:
pygame.quit()
sys.exit()
key_pressed = pygame.key.get_pressed()
if key_pressed[K_UP]:
heroPlane.moveUp()
if key_pressed[K_DOWN]:
heroPlane.moveDown()
if key_pressed[K_LEFT]:
heroPlane.moveLeft()
if key_pressed[K_RIGHT]:
heroPlane.moveRight()
screen.blit(bg, (0, 0))
heroPlane.time_delay()
for each in big_enemies:
if each.active == True:
each.move()
screen.blit(each.image, each.rect)
else:
if not (heroPlane.delay % 3):
screen.blit(each.destroy_images[big_destroy_index], each.rect)
big_destroy_index = (big_destroy_index + 1) % 6
if big_destroy_index == 0:
each.play_sound()
each.reset()
for each in mid_enemies:
if each.active == True:
each.move()
screen.blit(each.image, each.rect)
else:
if not (heroPlane.delay % 3):
screen.blit(each.destroy_images[mid_destroy_index], each.rect)
mid_destroy_index = (mid_destroy_index + 1) % 4
if mid_destroy_index == 0:
each.play_sound()
each.reset()
for each in small_enemies:
if each.active == True:
each.move()
screen.blit(each.image, each.rect)
else:
if not (heroPlane.delay % 3):
screen.blit(each.destroy_images[small_destroy_index], each.rect)
small_destroy_index = (small_destroy_index + 1) % 4
if small_destroy_index == 0:
each.play_sound()
each.reset()
if heroPlane.active == True:
heroPlane.animation()
else:
if not (heroPlane.delay % 3):
screen.blit(heroPlane.destroy_images[hero_destroy_index], heroPlane.rect)
hero_destroy_index = (hero_destroy_index + 1) % 4
if hero_destroy_index == 0:
life_NUM -= 1
heroPlane.play_sound()
heroPlane.reset()
if life_NUM > 0:
for i in range(life_NUM):
screen.blit(life_image, (width - 10 - (i + 1) * life_rect.width, height - 10 - life_rect.height))
if not (heroPlane.delay % 10):
bullet1[bullet1_index].reset(heroPlane.rect.midtop)
bullet1_index = (bullet1_index + 1) % BULLET1_NUM
for each in bullet1:
if each.active == True:
each.move()
screen.blit(each.image, each.rect)
enemies_hit = pygame.sprite.spritecollide(each, enemies, False,pygame.sprite.collide_mask)
if enemies_hit:
each.active = False
for e in enemies_hit:
if e in mid_enemies or e in big_enemies:
e.energy -= 1
if e.energy == 0:
e.active = False
else:
e.active = False
else:
each.reset(heroPlane.rect.midtop)
enemies_collided = pygame.sprite.spritecollide(heroPlane, enemies, False, pygame.sprite.collide_mask)
if enemies_collided:
heroPlane.active = False
for each in enemies_collided:
each.active = False
pygame.display.flip()
clock.tick(60)
if __name__ == '__main__':
main()
