pygame游戏开发框架（8）：游戏逻辑

@敌机类

import random

import pygame
from pygame.sprite import Sprite


# 敌机类
class SmallEnemy(Sprite):
    # 构造方法：确定颜值、确定初始位置、引擎功率
    def __init__(self, winWidth, winHeight):
        Sprite.__init__(self)
        self.winWidth = winWidth
        self.winHeight = winHeight

        # 外形
        self.mSurface = pygame.image.load("./images/enemy1.png").convert_alpha()

        # 爆炸
        self.dSurface1 = pygame.image.load("./images/enemy1_down1.png").convert_alpha()
        self.dSurface2 = pygame.image.load("./images/enemy1_down2.png").convert_alpha()
        self.dSurface3 = pygame.image.load("./images/enemy1_down3.png").convert_alpha()
        self.dSurface4 = pygame.image.load("./images/enemy1_down4.png").convert_alpha()
        self.dList = [self.dSurface1, self.dSurface2, self.dSurface3, self.dSurface4]
        self.dIndex = 0

        # 确定敌机位置
        self.rect = self.mSurface.get_rect()
        self.reset()

        # 敌机飞行速度
        self.speed = 5

        # 添加碰撞检测遮罩
        self.mask = pygame.mask.from_surface(self.mSurface)

    # 重置敌机位置和生命
    def reset(self):
        self.rect.left = random.randint(0, self.winWidth - self.rect.width)
        self.rect.top = 0 - random.randint(0, 1000)
        self.isAlive = True
        self.dIndex = 0

    # 机械地向下飞行
    def move(self):
        if self.rect.top < self.winHeight:
            self.rect.bottom += self.speed
        else:
            self.isAlive = False
            self.reset()

    # fCount=当前第几帧
    def destroy(self, fCount, winSurface,dSound):
        winSurface.blit(self.dList[self.dIndex],self.rect)

        if fCount % 3 == 0:
            # 切下一副面孔
            self.dIndex += 1

        if self.dIndex == 4:
            dSound.play()
            self.reset()

@添加敌机

# 创建敌机Group
seGroup = pygame.sprite.Group()
for i in range(ENEMY_NUM):
    se = SmallEnemy(width, height)
    seGroup.add(se)

@绘制敌机

# 绘制敌机
for se in seGroup:
    windowSurface.blit(se.mSurface, se.rect)

    # 每一帧都让敌机飞行5公里
    se.move()

@子弹类

import pygame
from pygame.sprite import Sprite


class Bullet(Sprite):
    # 构造方法：颜值、位置、速度
    # position = 机头位置
    def __init__(self):
        super().__init__()

        # 颜值
        self.mSurface = pygame.image.load("./images/bullet1.png").convert_alpha()
        self.rect = self.mSurface.get_rect()

        # 将子弹的顶部中央对齐机头位置
        # self.reset(position)
        self.isAlive = False

        # 子弹速度
        self.speed = 15

        # 添加碰撞检测遮罩
        self.mask = pygame.mask.from_surface(self.mSurface)

    # 重置子弹位置和生命
    def reset(self, position):
        self.rect.left = position[0] - self.rect.width // 2
        self.rect.bottom = position[1]
        self.isAlive = True

    # 飞行方法
    def move(self):
        if self.rect.bottom > 0:
            self.rect.top -= self.speed
        else:
            self.isAlive = False

@射击

# 重复与复用10颗子弹
BULLET_NUM = 10

# 创建子弹
bList = []
bIndex = 0
for i in range(BULLET_NUM):
    b = Bullet()
    bList.append(b)

# 每10帧在机头射出一颗子弹
if count % 10 == 0:
    b = bList[bIndex]  # 取出一颗子弹
    b.reset(hero.rect.midtop)  # 立即装载到【当前】机头位置
    # windowSurface.blit(b.mSurface, b.rect)  # 画子弹
    bulletSound.play()#呼啸声

    bIndex = (bIndex + 1) % BULLET_NUM  # 序号递增

# 每帧都让子弹飞
for b in bList:
    if b.isAlive:
        windowSurface.blit(b.mSurface, b.rect)  # 画子弹
        b.move()

@敌机爆炸

# 子弹-敌机碰撞检测
for b in bList:
    if b.isAlive:
        hitEnemyList = pygame.sprite.spritecollide(b, seGroup, False, pygame.sprite.collide_mask)
        if len(hitEnemyList) > 0:
            b.isAlive = False
            for se in hitEnemyList:
                se.isAlive = False

# 绘制敌机
for se in seGroup:
    if se.isAlive:
        windowSurface.blit(se.mSurface, se.rect)
        # 每一帧都让敌机飞行5公里
        se.move()
    else:
        se.destroy(count, windowSurface, bombSound)

# fCount=当前第几帧
def destroy(self, fCount, winSurface,dSound):
    winSurface.blit(self.dList[self.dIndex],self.rect)

    if fCount % 3 == 0:
        # 切下一副面孔
        self.dIndex += 1

    if self.dIndex == 4:
        dSound.play()
        self.reset()

@游戏记分

# 业务变量
score = 0  # 统计得分

# 精灵碰撞检测
for b in bList:
    if b.isAlive:
        hitEnemyList = pygame.sprite.spritecollide(b, seGroup, False, pygame.sprite.collide_mask)
        if len(hitEnemyList) > 0:
            b.isAlive = False
            for se in hitEnemyList:
                se.isAlive = False
                score += 100  # 打死一个敌人加100分