pygame飞机大战开发实录11

上一篇将主要的函数封装到了一个对象中，还把列表变量，替换成类属性，本篇着重讲解类的完善过程

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一、showText类：A，新增字体大小 B，调整显示文本更新方法，更改为：display方法中，更新显示文本，取消创建对象是传入显示文本。

二、EnemyPlane类：`
添加:ismove(True/False) postion 两个参数，这样创建普通敌机可以选择移动、不移动，固定刷新位置，随机刷新。
删除了血量显示，之前显示它只是为了更方便观察敌机状态。

三、EnemyBullet类改动比较大：完整源码如下 showText EnemyPlane EnemyBullet

class EnemyBullet(BaseBullet): #敌机子弹
    group = []
    def __init__(self, pygame_screen, postion,movingPath,delayTime,deviation,bullet_image):
        self.movingPath = movingPath     #花式子弹名称
        self.delayTime = delayTime       #第一发子弹停留延时，给玩家一个提示，这里要发射子弹了
        self.setpX,self.setpY = deviation #偏移量，做散弹
        Base.__init__(self, pygame_screen,postion, bullet_image)
        EnemyBullet.group.append(self)
    def move(self):
        if self.movingPath == "normal":
            self.y += 3
        elif self.movingPath == "laser":
            if self.delayTime == 0:
                self.y += 10
            else:
                self.delayTime -= 1
        elif self.movingPath == "Rbiasline":
            self.y += self.setpY
            self.x += self.setpX * 3
        elif self.movingPath == "Lbiasline":
            self.y += self.setpY
            self.x -= self.setpX
        elif self.movingPath == "Rline":
            if self.delayTime == 0:
                self.y += 10
            else:
                self.x += 2
                self.delayTime -= 1
        elif self.movingPath == "Lline":
            if self.delayTime == 0:
                self.y += 10
            else:
                self.x -= 2
                self.delayTime -= 1

EnemyBullet子弹发射补充相应的参数

EnemyBullet(self.screen, (self.x + (self.w / 2) - 4 , self.y + (self.h)),
"normal",0,(0,0),Image_EnemyBullet)

四、HeroPlane类 showText EnemyPlane EnemyBullet HeroPlane

class HeroPlane(BasePlane):
    group = []
    def __init__(self, pygame_screen):
        BasePlane.__init__(self, pygame_screen, (210, 700) ,Image_HeroPlane, 5)
        self.moveToLeft  = False  # 控制玩家飞机移动位置
        self.moveToRight = False
        self.moveToUp    = False
        self.moveToDown  = False
        self.keepFire    = False
        self.moveSpeed   = 3
        self.health      = 6
        self.maxHealth   = 6
        self.live        = 10
        self.invincible  = True
        self.invincibleTime   = 400  #无敌时间
        self.invincibleTiming = 0    #无敌倒计时
        
        # 新增属性
        self.bulletLevel   = 1 # 子弹使用级别来区分
        self.bombs         = 0 # 炸弹数
        self.reduction     = 0 # 缩小状态
        self.miniplane     = 0 # 变形成mini飞机
        # 血量、无敌状态、炸弹数移动到左下角集中显示
        self.showHealthPic = pygame.transform.scale(self.image, (25, 30))
        self.showbombs    = pygame.image.load(Image_bombs)
        self.showbombs    = pygame.transform.scale(self.showbombs, (31, 27))
        self.showinvincibleTime = ShowText(self.screen, Font_Consola, (80, 80, 80), (50 , Screen_Height - 172),18)
        self.showbombCount     = ShowText(self.screen, Font_Consola, (149, 85, 85), (58, Screen_Height - 126),18)
        self.x = (Screen_Width - self.w) / 2  # 调整boss刷新位置
        self.__crate_images()  # 添加爆炸动画图片组
        HeroPlane.group.append(self)

    def __crate_images(self):
        for i in range(4):
            self.bombList.append(pygame.image.load("./res/hero_blowup_n" + str(i + 1) + ".png"))
            
    def move(self):
        #通过新增属性，选择不同的飞机图片进行显示
        self.image = pygame.image.load(Image_HeroPlane)
        # 飞机普通状态显示的图片
        if self.moveToRight and self.x < 480 - self.w:  # 移动越界判断
            self.x += self.moveSpeed
        if self.moveToLeft and self.x > self.moveSpeed:
            self.x -= self.moveSpeed
        if self.moveToDown and self.y < 852 - self.h:
            self.y += self.moveSpeed
        if self.moveToUp and self.y > self.moveSpeed:
            self.image = pygame.image.load(Image_HeroPlaneUp)  # 飞机往前飞状态显示的图片
            self.y -= self.moveSpeed
        if self.reduction == 1 :
            self.image = pygame.transform.scale(self.image, (50, 62))
            self.w, self.h = self.image.get_size()
        if  self.miniplane == 1 :
            self.image = self.image = pygame.image.load(Image_MiniPlane)
            self.w, self.h = self.image.get_size()
    def useBomb(self):
        #使用炸弹
        if self.bombs > 0:
            self.bombs -= 1
            enemyObjs = [EnemyPlane.group, BossPlane.group, RewardPlane.group]
            for enemyObj in enemyObjs:
                for index in range(len(enemyObj) - 1, -1, -1):
                    if isinstance(enemyObj[index], BossPlane):
                        enemyObj[index].hit = True
                    else:
                        enemyObj[index].live = 0
                        enemyObj[index].hit = True
            EnemyBullet.group = []

    def fire(self):
        #玩家飞机开火
        #根据不同子弹等级，发射不同的子弹样式
        if self.keepFire and self.bulletCdOk:
            PlaySound(Sound_HeroFire)
            if self.bulletLevel == 1 or self.bulletLevel == 3 or self.bulletLevel == 4:
                Bullet(self.screen, (self.x + (self.w / 2) - 2 , self.y - 2), "line")
            if self.bulletLevel == 2:
                Bullet(self.screen, (self.x + (self.w / 2) - 34, self.y + 20), "line")
                Bullet(self.screen, (self.x + (self.w / 2) + 28, self.y + 20), "line")
            if self.bulletLevel == 3 or self.bulletLevel == 4:
                Bullet(self.screen, (self.x + (self.w / 2) - 34, self.y + 20), "Lbiasline")
                Bullet(self.screen, (self.x + (self.w / 2) + 28, self.y + 20), "Rbiasline")
            if self.bulletLevel == 4:
                Bullet(self.screen, (self.x , self.y + self.h / 2), "Lline")
                Bullet(self.screen, (self.x + (self.w * 6 / 8) , self.y + self.h / 2), "Rline")
            self.bulletCoolDownstate = 0
            self.bulletCdOk = False
    def display(self):
        #左下角玩家信息显示
        if self.invincible:
            self.invincibleTiming += 1
            if self.invincibleTiming == self.invincibleTime:
                # 无敌时间到
                self.invincibleTiming = 0
                self.invincible       = False
            else:
                #无敌倒计时显示
                self.showinvincibleTime.display(str(int((self.invincibleTime - self.invincibleTiming) // (self.invincibleTime / 10))))

        BasePlane.display(self)
        #血条显示
        self.screen.blit(self.showHealthPic, (10 , Screen_Height - 184))
        if self.bombs > 0:
            self.screen.blit(self.showbombs,(7,Screen_Height - 140 ))
            self.showbombCount.display('X'+str(self.bombs))
        for i in range(self.health):
            self.screen.blit(self.healthImage, (10 + i * 9, Screen_Height - 198))

玩家飞机状态信息显示方式修改：

玩家飞机正常状态，缩小状态，变形状态

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本篇讲解了 showText EnemyPlane EnemyBullet HeroPlane四个类的修改，下一篇会继续讲解其他类的修改。