学习 Python 之 Pygame 开发魂斗罗（十三）

继续编写魂斗罗

在上次的博客学习 Python 之 Pygame 开发魂斗罗（十二）中，我们解决了一些问题，这次我们新加入一个敌人，那我们就开始吧

下面是图片的素材

链接：https://pan.baidu.com/s/1X7tESkes_O6nbPxfpHD6hQ?pwd=hdly
提取码：hdly

1. 创建敌人2类

这次新加入一个敌人，首先创建敌人2的类

class Enemy2(pygame.sprite.Sprite):def __init__(self, x, y, direction, currentTime):pygame.sprite.Sprite.__init__(self)self.r = 0.0self.bulletPosition = 0self.rightImage = loadImage('../Image/Enemy/Enemy2/right.png')self.rightUpImage = loadImage('../Image/Enemy/Enemy2/rightUp.png')self.rightDownImage = loadImage('../Image/Enemy/Enemy2/rightDown.png')self.leftImage = loadImage('../Image/Enemy/Enemy2/right.png', True)self.leftUpImage = loadImage('../Image/Enemy/Enemy2/rightUp.png', True)self.leftDownImage = loadImage('../Image/Enemy/Enemy2/rightDown.png', True)self.type = 2if direction == Direction.RIGHT:self.image = self.rightImageelse:self.image = self.leftImageself.rect = self.image.get_rect()self.rect.x = xself.rect.y = yself.center = self.rect.x + self.rect.width / 2, self.rect.y + self.rect.height / 2self.isDestroy = Falseself.isFiring = Falseself.life = 1self.lastTime = currentTimeself.n = 0# 计算时间self.t = 0

这里设置了一下加载的图片，还有一些必要的属性

下面是这个敌人的图片

这个敌人发射子弹的放心是玩家的中心，所以我们要计算出玩家的中心，也要计算出敌人的中心，这样可以计算出玩家与敌人相距的x方向的距离和y方向的距离

所以我们要有一个计算敌人中心的函数

def getCenter(self):return self.rect.x + self.rect.width / 2, self.rect.y + self.rect.height / 2

有了计算中心的函数，现在就可以写draw()函数了

2. 编写敌人2类的draw()函数

这个敌人一共有6种状态，下面是示意图

这六个姿势就是6个图片

敌人的枪口始终对着我们的中心位置，因为在魂斗罗游戏中，这个敌人发射的子弹是一直跟着玩家的，玩家移动，它就移动枪口的位置，因此就有这6中姿势

下面我们首先计算出敌人和玩家的距离

我们通过图，可以看出x和y分别都是用人物的中心进行计算而得来的

∠1是玩家与敌人中心连线与水平方向的夹角，这个交的大小决定着敌人的姿势

这张图片中的蓝色线，是45度的线，所以我们把姿势定下来

当玩家在敌人左边时，计算玩家与敌人的夹角，如果大于45度，敌人就是姿势6，如果小于-45度，敌人状态就是姿势5，其他敌人的姿势就是通过这样的方法计算出来的

下面我们写代码

def draw(self, window: pygame.Surface, player: PlayerOne, currentTime):# 获取玩家中心playerCenter = player.getCenter()# 获取敌人中心center = self.getCenter()# 计算距离y = playerCenter[1] - center[1]x = playerCenter[0] - center[0]# 设置存放夹角的变量r = 0# 当 x = 0时，此时玩家在敌人的正上方，我们不做任何操作if x != 0:# 如果玩家在敌人的正上方，计算角度r = math.atan(y / x) * 180 / math.pi# 设置变量，用来记录敌人的姿势，敌人的姿势就是发射子弹时的样子self.bulletPosition = 1# 根据距离的正负关系判断玩家在敌人的左边还是右边if x >= 0:if -45 < r < 45:self.bulletPosition = 2self.image = self.rightImageelif r >= 45:self.bulletPosition = 3self.image = self.rightDownImageelif r <= -45:self.bulletPosition = 1self.image = self.rightUpImageelse:if -45 < r < 45:self.bulletPosition = 5self.image = self.leftImageelif r <= -45:self.bulletPosition = 4self.image = self.leftDownImageelif r >= 45:self.bulletPosition = 6self.image = self.leftUpImageself.r = rwindow.blit(self.image, self.rect)

代码中我写了注释，这段代码的意思上面也说明明白了，大概就是计算出玩家和敌人的x方向距离和y方向距离，然后计算夹角，根据夹角的度数设置敌人的姿势

现在关键的一步来了，发射子弹的位置有了，下面就是要思考：如何让敌人对着玩家中心发射？

我们来想一下，在高中我们学过 路程 = 时间×速度，现在我们知道了路程，就是敌人和玩家中心的距离差，要计算速度，那么需要知道时间，那么如何计算时间呢？有了时间，我们通过公式 速度 = 路程 / 时间 计算出速度了

我们可以把调用draw()函数的时间间隔记录下来，把这个的平均值设置为时间

于是我们在构造函数中，就有了这两个变量

self.n = 0
# 时间
self.t = 0

n记录总的间隔数，t记录当前间隔的平均值

下面是计算思路：把每次调用该函数的时间间隔记录下来，根据调用的次数，计算出平均调用该函数的时间间隔，这个时间间隔就作为子弹的发射速度

self.n += 1
# 计算速度
total = self.t * self.n
total = total + abs(currentTime - self.lastTime)
self.lastTime = currentTime
self.t = total * 1.0 / (self.n + 1)

首先我们把上次调用该函数的时间记录到lastTime中，这次调用函数时的时间记录在currentTime 中，通过函数参数把currentTime值传进来

total = self.t * self.n

这句代码来计算总的时间间隔，因为最后我们要求两次调用该函数间隔的平均值

其次，我们使用下面的代码，把总的时间间隔和求出来

total = total + abs(currentTime - self.lastTime)

之后 self.lastTime = currentTime 记录当前的时间，准备进行下一次计算

最后，计算间隔的平均值

self.t = total * 1.0 / (self.n + 1)

举一个例子：

第一次计算出调用该函数的时间间隔是7ms，此时n = 1，t = 7，子弹的速度就设置为7

第二次计算出调用该函数的时间间隔是8ms，此时我们要计算8和7的平均值，此时 n = 2, t = (1 * 7 + 8) / 2= 7.5，所以此时的子弹速度为7.5

第二次计算出调用该函数的时间间隔是8ms，此时我们还是要计算平均值，于是有t = （7.5 * 2 + 8）/ 3，这个结果还是记录为子弹的速度

以此类推，每次都会更新这个间隔时间，这个间隔时间就是子弹的速度

所以，我们最后就计算出来了子弹的速度了

把代码写到draw()函数中，就完成了draw()函数

def draw(self, window: pygame.Surface, player: PlayerOne, currentTime):self.n += 1# 计算时间total = self.t * self.ntotal = total + abs(currentTime - self.lastTime)self.lastTime = currentTimeself.t = total * 1.0 / (self.n + 1)# 获取玩家中心playerCenter = player.getCenter()# 获取敌人中心center = self.getCenter()# 计算距离y = playerCenter[1] - center[1]x = playerCenter[0] - center[0]# 设置存放夹角的变量r = 0# 当 x = 0时，此时玩家在敌人的正上方，我们不做任何操作if x != 0:# 如果玩家在敌人的正上方，计算角度r = math.atan(y / x) * 180 / math.pi# 设置变量，用来记录敌人的姿势，敌人的姿势就是发射子弹时的样子self.bulletPosition = 1# 根据距离的正负关系判断玩家在敌人的左边还是右边if x >= 0:if -45 < r < 45:self.bulletPosition = 2self.image = self.rightImageelif r >= 45:self.bulletPosition = 3self.image = self.rightDownImageelif r <= -45:self.bulletPosition = 1self.image = self.rightUpImageelse:if -45 < r < 45:self.bulletPosition = 5self.image = self.leftImageelif r <= -45:self.bulletPosition = 4self.image = self.leftDownImageelif r >= 45:self.bulletPosition = 6self.image = self.leftUpImageself.r = rwindow.blit(self.image, self.rect)

3. 编写敌人越界消失函数

当敌人创建出来后，我们没有消灭，他就会随着玩家向右移动消失在玩家的窗口中，为了方式程序中存在大量的无效的敌人数据，我们要检查程序，让那些离开窗口的敌人自动销毁

编写检查函数

def checkPosition(self, x, y):if abs(self.rect.x - x) > 2000:self.isDestroy = Trueelif abs(self.rect.y - y) > 600:self.isDestroy = True

当然，敌人1类也有该函数

4. 编写敌人开火函数

由于敌人2发射的子弹要对着玩家的方向发射，这里我们要修改子弹类

把子弹的初始速度变为0

修改构造函数参数

enemyType 是敌人的类型，类型不一样，发射位置不一样

parameter是一些额外的参数，敌人2发射子弹时，这里面就是传入一些必要的信息，用来计算

接下来将原来的逻辑进行修改

大部分代码没有改变，加了一个if-else语句

下面我们来写敌人2的子弹逻辑代码

elif enemyType == 2:self.index = 0bulletPosition = parameter[0]player = parameter[1]playerCenter = player.getCenter()if player.isDown or player.isSquating:# 下蹲、蹲下、在水中时，让人物中心下移动，下移动代表y坐标的值相加playerCenter = (playerCenter[0], playerCenter[1] + 8)elif player.isInWater:playerCenter = (playerCenter[0], playerCenter[1] + 15)t = parameter[2]# t *= 15r = parameter[3]if bulletPosition == 1:self.rect.x += 19 * PLAYER_SCALEself.rect.y += -1 * PLAYER_SCALEself.ySpeed = - abs(self.rect.y - playerCenter[1]) * 1.0 / tself.xSpeed = abs(self.rect.x - playerCenter[0]) * 1.0 / telif bulletPosition == 2:self.rect.x += 25 * PLAYER_SCALEself.rect.y += 10 * PLAYER_SCALEs = -1if r > 0:s = 1self.ySpeed = s * abs(self.rect.y - playerCenter[1]) * 1.0 / tself.xSpeed = abs(self.rect.x - playerCenter[0]) * 1.0 / telif bulletPosition == 3:self.rect.x += 25 * PLAYER_SCALEself.rect.y += 25 * PLAYER_SCALEself.ySpeed = abs(self.rect.y - playerCenter[1]) * 1.0 / tself.xSpeed = abs(self.rect.x - playerCenter[0]) * 1.0 / telif bulletPosition == 4:self.rect.x += -1 * PLAYER_SCALEself.rect.y += 25 * PLAYER_SCALEself.ySpeed = abs(self.rect.y - playerCenter[1]) * 1.0 / tself.xSpeed = - abs(self.rect.x - playerCenter[0]) * 1.0 / telif bulletPosition == 5:self.rect.x += -1 * PLAYER_SCALEself.rect.y += 10 * PLAYER_SCALEs = 1if r > 0:s = -1self.ySpeed = s * abs(self.rect.y - playerCenter[1]) * 1.0 / tself.xSpeed = - abs(self.rect.x - playerCenter[0]) * 1.0 / telif bulletPosition == 6:self.rect.x += -1 * PLAYER_SCALEself.rect.y += -1 * PLAYER_SCALEself.ySpeed = - abs(self.rect.y - playerCenter[1]) * 1.0 / tself.xSpeed = - abs(self.rect.x - playerCenter[0]) * 1.0 / tself.xSpeed /= 5self.ySpeed /= 5
self.image = self.images[self.index]

完整的子弹类构造函数

def __init__(self, person, enemyType = 0, parameter = None):pygame.sprite.Sprite.__init__(self)self.images = [loadImage('../Image/Bullet/bullet1.png')]self.index = 0# 速度self.xSpeed = 1self.ySpeed = 1self.rect = pygame.Rect(person.rect)# 类型0表示不是敌人if enemyType == 0:if person.isInWater:self.waterPosition(person)else:self.landPosition(person)# 敌人1elif enemyType == 1:self.index = 0if person.direction == Direction.RIGHT:self.rect.x += 27 * PLAYER_SCALEself.rect.y += 7 * PLAYER_SCALEself.ySpeed = 0self.xSpeed = 7else:self.rect.x += -1 * PLAYER_SCALEself.rect.y += 7 * PLAYER_SCALEself.ySpeed = 0self.xSpeed = -7# 敌人2elif enemyType == 2:self.index = 0# 从额外参数中获取敌人的姿势，即子弹的发射位置bulletPosition = parameter[0]# 获取玩家对象player = parameter[1]# 获取玩家中心playerCenter = player.getCenter()# 让人物中心下移if player.isDown or player.isSquating:# 下蹲、蹲下、在水中时，让人物中心下移动，下移动代表y坐标的值相加playerCenter = (playerCenter[0], playerCenter[1] + 8)elif player.isInWater:playerCenter = (playerCenter[0], playerCenter[1] + 15)# 获取子弹移动的时间t = parameter[2]# t *= 15# 获取敌人与玩家连线与水平方向的夹角r = parameter[3]# 根据子弹的发射位置（敌人的姿势）计算敌人的发射子弹的位置和子弹的速度if bulletPosition == 1:self.rect.x += 19 * PLAYER_SCALEself.rect.y += -1 * PLAYER_SCALE# 计算公式，|x0 - x1| / t = vself.ySpeed = - abs(self.rect.y - playerCenter[1]) * 1.0 / tself.xSpeed = abs(self.rect.x - playerCenter[0]) * 1.0 / telif bulletPosition == 2:self.rect.x += 25 * PLAYER_SCALEself.rect.y += 10 * PLAYER_SCALE# s 表示方向这里可以直接根据r的大小，计算出子弹的速度是减少还是增加# 减少表示向负方向移动s = -1if r > 0:s = 1self.ySpeed = s * abs(self.rect.y - playerCenter[1]) * 1.0 / tself.xSpeed = abs(self.rect.x - playerCenter[0]) * 1.0 / telif bulletPosition == 3:self.rect.x += 25 * PLAYER_SCALEself.rect.y += 25 * PLAYER_SCALEself.ySpeed = abs(self.rect.y - playerCenter[1]) * 1.0 / tself.xSpeed = abs(self.rect.x - playerCenter[0]) * 1.0 / telif bulletPosition == 4:self.rect.x += -1 * PLAYER_SCALEself.rect.y += 25 * PLAYER_SCALEself.ySpeed = abs(self.rect.y - playerCenter[1]) * 1.0 / tself.xSpeed = - abs(self.rect.x - playerCenter[0]) * 1.0 / telif bulletPosition == 5:self.rect.x += -1 * PLAYER_SCALEself.rect.y += 10 * PLAYER_SCALEs = 1if r > 0:s = -1self.ySpeed = s * abs(self.rect.y - playerCenter[1]) * 1.0 / tself.xSpeed = - abs(self.rect.x - playerCenter[0]) * 1.0 / telif bulletPosition == 6:self.rect.x += -1 * PLAYER_SCALEself.rect.y += -1 * PLAYER_SCALEself.ySpeed = - abs(self.rect.y - playerCenter[1]) * 1.0 / tself.xSpeed = - abs(self.rect.x - playerCenter[0]) * 1.0 / tself.xSpeed /= 5self.ySpeed /= 5self.image = self.images[self.index]# 销毁开关self.isDestroy = False

之后我们来写玩家2类的开火函数了

def fire(self, enemyBulletList, player):i = random.randint(0, 30)if i == 5:self.isFiring = TrueenemyBulletList.append(Bullet(self, 2, (self.bulletPosition, player, self.t, self.r)))

设置开火的频率，开火就创建一个子弹对象，把相应的额外参数传入

好，至此就完成了敌人2类

5. 把敌人2加入地图进行测试

来到主类，编写全局函数，用来创建敌人2

def generateEnemy2(x, y):enemy = Enemy2(x, y, MainGame.player1, pygame.time.get_ticks())MainGame.enemyList.append(enemy)MainGame.allSprites.add(enemy)MainGame.enemyGroup.add(enemy)

之后在generateEnemy()函数中调用

这个代码就是在指定的位置上创建一个敌人2

if -2005 < self.backRect.x < -2000:if self.enemyBoolList[2]:self.enemyBoolList[2] = FalsegenerateEnemy2(MainGame.player1.rect.x + 540, 465)

接下来运行一下游戏，看看效果

出现了报错信息，应该是子弹类的构造函数进行了修改，所有创建子弹的函数都要修改，我们下面一一进行修改

首先进入enemyUpdate()函数，由于我们加入了敌人2，所以调用draw()函数的时候要进行判断了，因为敌人1和敌人2的draw()函数参数不一样

将代码进行修改

def enemyUpdate(enemyList, enemyBulletList):# 遍历整个敌人列表for enemy in enemyList:if enemy.type == 1:if enemy.isDestroy:enemyList.remove(enemy)MainGame.allSprites.remove(enemy)MainGame.enemyGroup.remove(enemy)else:enemy.checkPosition(MainGame.player1.rect.x, MainGame.player1.rect.y)enemy.draw(pygame.time.get_ticks())enemy.move(pygame.time.get_ticks())enemy.fire(enemyBulletList)elif enemy.type == 2:if enemy.isDestroy:enemyList.remove(enemy)MainGame.allSprites.remove(enemy)MainGame.enemyGroup.remove(enemy)else:enemy.checkPosition(MainGame.player1.rect.x, MainGame.player1.rect.y)enemy.draw(MainGame.window, MainGame.player1, pygame.time.get_ticks())enemy.fire(enemyBulletList, MainGame.player1)

变化的地方就是敌人2的draw()函数和fire()函数多了一个参数

之后给敌人1类加入成员变量type

self.type = 1

我们再运行游戏，看看问题

可以看到敌人发射子弹的方向一直向着玩家

但是还有个问题，就是玩家屏幕向右移动的时候，子弹会停下来

这应该是窗口移动时，没让子弹也一起移动

我们修改一下mapObjectMove()函数，加入下面的代码

理论上，爆炸也应该加入进去，我们没有加入，我们把爆炸也一同加入

def mapObjectMove(self):for sprite in MainGame.allSprites:sprite.rect.x -= self.cameraAdaptionfor collider in MainGame.playerColliderGroup:collider.rect.x -= self.cameraAdaptionfor collider in MainGame.colliderStack:collider.rect.x -= self.cameraAdaptionfor collider in MainGame.enemyColliderGroup:collider.rect.x -= self.cameraAdaptionfor bullet in MainGame.enemyBulletList:bullet.rect.x -= self.cameraAdaptionfor explode in MainGame.explodeList:explode.rect.x -= self.cameraAdaption

好，接下来我们再运行一下游戏，看看效果

可以看到，子弹也会随着窗口移动而移动啦

我们现在就完了敌人2了，下面就是加入其他敌人和BOSS了

完整的主类代码

import copy
import sys
import pygame
from Constants import *
from PlayerOne import PlayerOne
from Collider import Collider
from Enemy1 import Enemy1
from Explode import Explode
from Enemy2 import Enemy2def drawPlayerOneBullet(player1BulletList):for bullet in player1BulletList:if bullet.isDestroy:player1BulletList.remove(bullet)else:bullet.draw(MainGame.window)bullet.move()bullet.collideEnemy(MainGame.enemyList, MainGame.explodeList)def enemyUpdate(enemyList, enemyBulletList):# 遍历整个敌人列表for enemy in enemyList:if enemy.type == 1:if enemy.isDestroy:enemyList.remove(enemy)MainGame.allSprites.remove(enemy)MainGame.enemyGroup.remove(enemy)else:enemy.checkPosition(MainGame.player1.rect.x, MainGame.player1.rect.y)enemy.draw(pygame.time.get_ticks())enemy.move(pygame.time.get_ticks())enemy.fire(enemyBulletList)elif enemy.type == 2:if enemy.isDestroy:enemyList.remove(enemy)MainGame.allSprites.remove(enemy)MainGame.enemyGroup.remove(enemy)else:enemy.checkPosition(MainGame.player1.rect.x, MainGame.player1.rect.y)enemy.draw(MainGame.window, MainGame.player1, pygame.time.get_ticks())enemy.fire(enemyBulletList, MainGame.player1)def updateEnemyPosition():# 遍历全部敌人列表for enemy in MainGame.enemyList:# 创建一个复制t = copy.copy(enemy)t.rect.y += 1# 让复制的y加1，看看有没有发生碰撞，这里看的碰撞是enemyColliderGroup中的碰撞collide = pygame.sprite.spritecollideany(t, MainGame.enemyColliderGroup)# 没有发生碰撞，让敌人下落if not collide:enemy.rect.y += 4enemy.isFalling = True# 改变下落时的图片enemy.image = enemy.rightFallImage if enemy.direction == Direction.RIGHT else enemy.leftFallImageelse:enemy.isFalling = False# 如果与河发生碰撞，表示敌人落到了水中，那么敌人直接死亡if collide in MainGame.enemyRiverGroup:enemy.isDestroy = TrueMainGame.explodeList.append(Explode(enemy))t.rect.y -= 1def drawEnemyBullet(enemyBulletList):for bullet in enemyBulletList:if bullet.isDestroy:enemyBulletList.remove(bullet)else:bullet.draw(MainGame.window)bullet.move()if bullet.collidePlayer(MainGame.player1, MainGame.explodeList):initPlayer1(MainGame.player1.life)def initLand():land1 = Collider(81, 119 * MAP_SCALE, 737 * MAP_SCALE, LAND_THICKNESS * MAP_SCALE)# land1 = Collider(81, 119 * MAP_SCALE, 8000 * MAP_SCALE, LAND_THICKNESS * MAP_SCALE)land2 = Collider(400, 151 * MAP_SCALE, 96 * MAP_SCALE, LAND_THICKNESS * MAP_SCALE)land3 = Collider(640, 183 * MAP_SCALE, 33 * MAP_SCALE, LAND_THICKNESS * MAP_SCALE)land4 = Collider(880, 183 * MAP_SCALE, 33 * MAP_SCALE, LAND_THICKNESS * MAP_SCALE)land5 = Collider(720, 215 * MAP_SCALE, 2 * LAND_LENGTH * MAP_SCALE, LAND_THICKNESS * MAP_SCALE)land6 = Collider(1040, 154 * MAP_SCALE, 2 * LAND_LENGTH * MAP_SCALE, LAND_THICKNESS * MAP_SCALE)land7 = Collider(1600, 166 * MAP_SCALE, 3 * LAND_LENGTH * MAP_SCALE, LAND_THICKNESS * MAP_SCALE)land8 = Collider(1120 * RATIO, 215 * MAP_SCALE, 2 * LAND_LENGTH * MAP_SCALE, LAND_THICKNESS * MAP_SCALE)land9 = Collider(1650 * RATIO, 119 * MAP_SCALE, 5 * LAND_LENGTH * MAP_SCALE, LAND_THICKNESS * MAP_SCALE)land10 = Collider(2185 * RATIO, 119 * MAP_SCALE, 8 * LAND_LENGTH * MAP_SCALE, LAND_THICKNESS * MAP_SCALE)land11 = Collider(2595 * RATIO, 215 * MAP_SCALE, 3 * LAND_LENGTH * MAP_SCALE, LAND_THICKNESS * MAP_SCALE)land12 = Collider(2770 * RATIO, 167 * MAP_SCALE, 2 * LAND_LENGTH * MAP_SCALE, LAND_THICKNESS * MAP_SCALE)land13 = Collider(2535 * RATIO, 87 * MAP_SCALE, 16 * LAND_LENGTH * MAP_SCALE, LAND_THICKNESS * MAP_SCALE)land14 = Collider(2950 * RATIO, 151 * MAP_SCALE, 7 * LAND_LENGTH * MAP_SCALE, LAND_THICKNESS * MAP_SCALE)land15 = Collider(3185 * RATIO, 215 * MAP_SCALE, 6 * LAND_LENGTH * MAP_SCALE, LAND_THICKNESS * MAP_SCALE)land16 = Collider(3420 * RATIO, 119 * MAP_SCALE, 7 * LAND_LENGTH * MAP_SCALE, LAND_THICKNESS * MAP_SCALE)land17 = Collider(3537 * RATIO, 183 * MAP_SCALE, 2 * LAND_LENGTH * MAP_SCALE, LAND_THICKNESS * MAP_SCALE)land18 = Collider(3715 * RATIO, 183 * MAP_SCALE, 2 * LAND_LENGTH * MAP_SCALE, LAND_THICKNESS * MAP_SCALE)land19 = Collider(3890 * RATIO, 167 * MAP_SCALE, 1 * LAND_LENGTH * MAP_SCALE, LAND_THICKNESS * MAP_SCALE)land20 = Collider(3775 * RATIO, 87 * MAP_SCALE, 5 * LAND_LENGTH * MAP_SCALE, LAND_THICKNESS * MAP_SCALE)land21 = Collider(4010 * RATIO, 151 * MAP_SCALE, 3 * LAND_LENGTH * MAP_SCALE, LAND_THICKNESS * MAP_SCALE)land22 = Collider(4125 * RATIO, 119 * MAP_SCALE, 2 * LAND_LENGTH * MAP_SCALE, LAND_THICKNESS * MAP_SCALE)land23 = Collider(4304 * RATIO, 151 * MAP_SCALE, 2 * LAND_LENGTH * MAP_SCALE, LAND_THICKNESS * MAP_SCALE)land24 = Collider(4304 * RATIO, 216 * MAP_SCALE, 1 * LAND_LENGTH * MAP_SCALE, LAND_THICKNESS * MAP_SCALE)land25 = Collider(4361 * RATIO, 183 * MAP_SCALE, 3 * LAND_LENGTH * MAP_SCALE, LAND_THICKNESS * MAP_SCALE)land26 = Collider(4537 * RATIO, 119 * MAP_SCALE, 2 * LAND_LENGTH * MAP_SCALE, LAND_THICKNESS * MAP_SCALE)land27 = Collider(4598 * RATIO, 87 * MAP_SCALE, 2 * LAND_LENGTH * MAP_SCALE, LAND_THICKNESS * MAP_SCALE)land28 = Collider(4657 * RATIO, 167 * MAP_SCALE, 1 * LAND_LENGTH * MAP_SCALE, LAND_THICKNESS * MAP_SCALE)land29 = Collider(4598 * RATIO, 216 * MAP_SCALE, 1 * LAND_LENGTH * MAP_SCALE, LAND_THICKNESS * MAP_SCALE)land30 = Collider(4776 * RATIO, 119 * MAP_SCALE, 2 * LAND_LENGTH * MAP_SCALE, LAND_THICKNESS * MAP_SCALE)land31 = Collider(4835 * RATIO, 151 * MAP_SCALE, 5 * LAND_LENGTH * MAP_SCALE, LAND_THICKNESS * MAP_SCALE)land32 = Collider(5010 * RATIO, 216 * MAP_SCALE, 3 * LAND_LENGTH * MAP_SCALE, LAND_THICKNESS * MAP_SCALE)land33 = Collider(5250 * RATIO, 183 * MAP_SCALE, 2 * LAND_LENGTH * MAP_SCALE, LAND_THICKNESS * MAP_SCALE)land34 = Collider(5423 * RATIO, 151 * MAP_SCALE, 2 * LAND_LENGTH * MAP_SCALE, LAND_THICKNESS * MAP_SCALE)land35 = Collider(5543 * RATIO, 119 * MAP_SCALE, 4 * LAND_LENGTH * MAP_SCALE, LAND_THICKNESS * MAP_SCALE)land36 = Collider(5601 * RATIO, 167 * MAP_SCALE, 3 * LAND_LENGTH * MAP_SCALE, LAND_THICKNESS * MAP_SCALE)land37 = Collider(5541 * RATIO, 216 * MAP_SCALE, 8 * LAND_LENGTH * MAP_SCALE, LAND_THICKNESS * MAP_SCALE)land38 = Collider(5776 * RATIO, 151 * MAP_SCALE, 1 * LAND_LENGTH * MAP_SCALE, LAND_THICKNESS * MAP_SCALE)land39 = Collider(5836 * RATIO, 183 * MAP_SCALE, 1 * LAND_LENGTH * MAP_SCALE, LAND_THICKNESS * MAP_SCALE)MainGame.playerLandGroup = pygame.sprite.Group(land1, land2, land3, land4, land5, land6, land7, land8, land9, land10,land11, land12, land13, land14, land15, land16, land17, land18, land19, land20,land21, land22, land23, land24, land25, land26, land27, land28, land29, land30,land31, land32, land33, land34, land35, land36, land37, land38, land39)eland1 = Collider(81, 119 * MAP_SCALE, 737 * MAP_SCALE, LAND_THICKNESS * MAP_SCALE)eland8 = Collider(1120 * RATIO, 215 * MAP_SCALE, 2 * LAND_LENGTH * MAP_SCALE, LAND_THICKNESS * MAP_SCALE)eland9 = Collider(1650 * RATIO, 119 * MAP_SCALE, 5 * LAND_LENGTH * MAP_SCALE, LAND_THICKNESS * MAP_SCALE)eland10 = Collider(2185 * RATIO, 119 * MAP_SCALE, 8 * LAND_LENGTH * MAP_SCALE, LAND_THICKNESS * MAP_SCALE)MainGame.enemyLandGroup = pygame.sprite.Group(eland1, eland8, eland9, eland10)MainGame.playerColliderGroup.add(MainGame.playerLandGroup)MainGame.enemyColliderGroup.add(MainGame.enemyLandGroup)def initRiver():river1 = Collider(0, 215 * MAP_SCALE, 289 * MAP_SCALE, LAND_THICKNESS * MAP_SCALE, (0, 0, 255))river2 = Collider(880, 215 * MAP_SCALE, 255 * MAP_SCALE, LAND_THICKNESS * MAP_SCALE, (0, 0, 255))river3 = Collider(1680, 215 * MAP_SCALE, 737 * MAP_SCALE, LAND_THICKNESS * MAP_SCALE, (0, 0, 255))eRiver1 = Collider(0, 215 * MAP_SCALE, 289 * MAP_SCALE, LAND_THICKNESS * MAP_SCALE, (0, 0, 255))eRiver3 = Collider(1680, 215 * MAP_SCALE, 737 * MAP_SCALE, LAND_THICKNESS * MAP_SCALE, (0, 0, 255))MainGame.playerRiverGroup = pygame.sprite.Group(river1, river2, river3)MainGame.enemyRiverGroup = pygame.sprite.Group(eRiver1, eRiver3)MainGame.playerColliderGroup.add(MainGame.playerRiverGroup)MainGame.enemyColliderGroup.add(MainGame.enemyRiverGroup)def drawExplode(explodeList):for explode in explodeList:if explode.isDestroy:explodeList.remove(explode)else:if explode.isUseTime:explode.draw(MainGame.window, pygame.time.get_ticks())else:explode.draw(MainGame.window)def initPlayer1(life):if life == 0:passMainGame.allSprites.remove(MainGame.player1)MainGame.player1 = PlayerOne(pygame.time.get_ticks(), life)MainGame.player1.rect.x = 80MainGame.player1.rect.bottom = 0# 把角色放入组中，方便统一管理MainGame.allSprites.add(MainGame.player1)def generateEnemy1(x, y, direction, currentTime):# 根据玩家的当前位置和方向产生一个敌人enemy = Enemy1(x, y, direction, currentTime)# 分别加入敌人列表，所有角色组，敌人碰撞组MainGame.enemyList.append(enemy)MainGame.allSprites.add(enemy)MainGame.enemyGroup.add(enemy)def generateEnemy2(x, y):enemy = Enemy2(x, y, MainGame.player1, pygame.time.get_ticks())MainGame.enemyList.append(enemy)MainGame.allSprites.add(enemy)MainGame.enemyGroup.add(enemy)class MainGame:player1 = NoneallSprites = pygame.sprite.Group()# 敌人enemyList = []window = None# 子弹player1BulletList = []enemyBulletList = []# 爆炸效果explodeList = []# 冲突playerLandGroup = pygame.sprite.Group()playerRiverGroup = pygame.sprite.Group()enemyLandGroup = pygame.sprite.Group()enemyRiverGroup = pygame.sprite.Group()playerColliderGroup = pygame.sprite.Group()enemyColliderGroup = pygame.sprite.Group()enemyGroup = pygame.sprite.Group()bridgeGroup = pygame.sprite.Group()# 冲突栈colliderStack = []def __init__(self):# 设置成员变量self.background = Noneself.backRect = Noneself.enemyBoolList = [True for _ in range(5)]# 初始化展示模块pygame.display.init()SCREEN_SIZE = (SCREEN_WIDTH, SCREEN_HEIGHT)# 初始化窗口MainGame.window = pygame.display.set_mode(SCREEN_SIZE)# 设置窗口标题pygame.display.set_caption('魂斗罗角色')# 是否结束游戏self.isEnd = False# 获取按键self.keys = pygame.key.get_pressed()# 帧率self.fps = 60self.clock = pygame.time.Clock()# 角色initPlayer1(3)# 加载背景self.initBackground()# 摄像头调整self.cameraAdaption = 0# 加载场景景物initLand()initRiver()# 碰撞失效间隔self.index = 0# 显示玩家生命值self.lifeImage = loadImage('../Image/Player/Player1/Life/life.png')def run(self):while not self.isEnd:# 设置背景颜色pygame.display.get_surface().fill((0, 0, 0))# 游戏场景和景物更新函数self.update(MainGame.window, MainGame.player1BulletList)# 获取窗口中的事件self.getPlayingModeEvent()# 更新窗口pygame.display.update()# 设置帧率self.clock.tick(self.fps)fps = self.clock.get_fps()caption = '魂斗罗 - {:.2f}'.format(fps)pygame.display.set_caption(caption)else:sys.exit()def getPlayingModeEvent(self):# 获取事件列表for event in pygame.event.get():# 点击窗口关闭按钮if event.type == pygame.QUIT:self.isEnd = True# 键盘按键按下elif event.type == pygame.KEYDOWN:self.keys = pygame.key.get_pressed()# 键盘按键抬起elif event.type == pygame.KEYUP:self.keys = pygame.key.get_pressed()def update(self, window, player1BulletList):# 加载背景window.blit(self.background, self.backRect)# 显示生命图标self.drawLifeImage(MainGame.window)# 敌人更新enemyUpdate(MainGame.enemyList, MainGame.enemyBulletList)drawExplode(MainGame.explodeList)drawPlayerOneBullet(MainGame.player1BulletList)drawEnemyBullet(MainGame.enemyBulletList)# 更新人物currentTime = pygame.time.get_ticks()MainGame.allSprites.update(self.keys, currentTime, player1BulletList)self.updatePlayerPosition()updateEnemyPosition()# 摄像机移动self.camera()# 显示物体MainGame.allSprites.draw(window)# 加载敌人self.generateEnemy()for collider in MainGame.playerLandGroup:r = collider.draw(window, self.player1.rect.y)# 如果没有画出来，表示玩家高度低于直线，所有把直线从组中删除if not r:# 删除前先检查一下是不是在组中if collider in MainGame.playerColliderGroup:# 删除并加入栈MainGame.colliderStack.insert(0, collider)MainGame.playerColliderGroup.remove(collider)else:# 如果画出来了，判断一下玩家距离是否高于线的距离if collider.rect.y > self.player1.rect.bottom:# 如果是的话，且冲突栈不为空，那么从栈中取出一个元素放入冲突组，最前面的元素一定是先如队列的if len(MainGame.colliderStack) > 0:f = MainGame.colliderStack.pop()MainGame.playerColliderGroup.add(f)MainGame.playerRiverGroup.draw(window)def camera(self):# 如果玩家的右边到达了屏幕的一半if self.player1.rect.right > SCREEN_WIDTH / 2:if not (self.backRect.x <= -3500 * MAP_SCALE):# 计算出超过的距离self.cameraAdaption = self.player1.rect.right - SCREEN_WIDTH / 2# 让背景向右走这么多距离self.backRect.x -= self.cameraAdaption# 场景中的物体都走这么多距离self.mapObjectMove()def mapObjectMove(self):for sprite in MainGame.allSprites:sprite.rect.x -= self.cameraAdaptionfor collider in MainGame.playerColliderGroup:collider.rect.x -= self.cameraAdaptionfor collider in MainGame.colliderStack:collider.rect.x -= self.cameraAdaptionfor collider in MainGame.enemyColliderGroup:collider.rect.x -= self.cameraAdaptionfor bullet in MainGame.enemyBulletList:bullet.rect.x -= self.cameraAdaptionfor explode in MainGame.explodeList:explode.rect.x -= self.cameraAdaptiondef updatePlayerPosition(self):# 在index的循环次数中，不进行碰撞检测，用来让玩家向下跳跃if self.index > 0:self.index -= 1self.player1.rect.x += self.player1.xSpeedself.player1.rect.y += self.player1.ySpeedself.player1.isDown = Falseelse:# 首先更新y的位置self.player1.rect.y += self.player1.ySpeed# 玩家向下跳跃，35次循环内不进行碰撞检测if self.player1.state == State.JUMP and self.player1.isDown:self.index = 35# 玩家向上跳跃，15次循环内不进行碰撞检测elif self.player1.state == State.JUMP and self.player1.isUp:self.index = 15else:# 检测碰撞# 这里是玩家和所有碰撞组中的碰撞体检测碰撞，如果发生了碰撞，就会返回碰撞到的碰撞体对象collider = pygame.sprite.spritecollideany(self.player1, MainGame.playerColliderGroup)# 如果发生碰撞，判断是不是在河里if collider in MainGame.playerRiverGroup:self.riverCollide()# 判断是不是在陆地上elif collider in MainGame.playerLandGroup:self.player1.isInWater = False# 如果发生碰撞if collider:if MainGame.player1.isInvincible:# 玩家落地不无敌MainGame.player1.isInvincible = False# 判断一下人物的y速度，如果大于0，则说明玩家已经接触到了碰撞体表面，需要让玩家站在表面，不掉下去if self.player1.ySpeed > 0:self.player1.ySpeed = 0self.player1.state = State.WALKself.player1.rect.bottom = collider.rect.topelse:# 否则的话，我们创建一个玩家的复制tempPlayer = copy.copy(self.player1)# 让玩家的纵坐标—+1，看看有没有发生碰撞tempPlayer.rect.y += 1# 如果没有发生碰撞，就说明玩家下面不是碰撞体，是空的if not pygame.sprite.spritecollideany(tempPlayer, MainGame.playerColliderGroup):# 如果此时不是跳跃状态，那么就让玩家变成下落状态，因为玩家在跳跃时，是向上跳跃，不需要对下面的物体进行碰撞检测if tempPlayer.state != State.JUMP:self.player1.state = State.FALLtempPlayer.rect.y -= 1# 与敌人碰撞if pygame.sprite.spritecollideany(MainGame.player1, MainGame.enemyGroup):if MainGame.player1.damage(1):MainGame.explodeList.append(Explode(MainGame.player1, ExplodeVariety.PLAYER1))initPlayer1(MainGame.player1.life)# 更新x的位置self.player1.rect.x += self.player1.xSpeed# 同样的检查碰撞collider = pygame.sprite.spritecollideany(self.player1, MainGame.playerColliderGroup)# 如果发生了碰撞if collider:# 判断玩家的x方向速度，如果大于0，表示右边有碰撞体if self.player1.xSpeed > 0:# 设置玩家的右边等于碰撞体的左边self.player1.rect.right = collider.rect.leftelse:# 左边有碰撞体self.player1.rect.left = collider.rect.rightself.player1.xSpeed = 0tempPlayer = copy.copy(self.player1)tempPlayer.rect.y += 1if c := pygame.sprite.spritecollideany(tempPlayer, MainGame.playerColliderGroup):if c in MainGame.playerLandGroup:self.player1.isInWater = Falseelif c in MainGame.playerRiverGroup:self.player1.isInWater = TruetempPlayer.rect.y -= 1def riverCollide(self):# 在河里设置isInWaterself.player1.isInWater = True# 设置玩家在河里不能跳跃self.player1.isJumping = False# 默认落下去是站在河里的self.player1.isStanding = True# 玩家方向不能向下self.player1.isDown = False# 根据玩家方向，加载落入河中的一瞬间的图片if self.player1.direction == Direction.RIGHT:self.player1.image = self.player1.rightInWaterImageelse:self.player1.image = self.player1.leftInWaterImagedef generateEnemy(self):if -1505 < self.backRect.x < -1500:if self.enemyBoolList[0]:self.enemyBoolList[0] = FalsegenerateEnemy1(MainGame.player1.rect.x + 600, POSITION_1, Direction.LEFT, pygame.time.get_ticks())generateEnemy1(MainGame.player1.rect.x - 360, POSITION_1, Direction.RIGHT, pygame.time.get_ticks())if -1705 < self.backRect.x < -1700:if self.enemyBoolList[1]:self.enemyBoolList[1] = FalsegenerateEnemy1(MainGame.player1.rect.x - 360, POSITION_1, Direction.RIGHT, pygame.time.get_ticks())generateEnemy1(MainGame.player1.rect.x - 400, POSITION_1, Direction.RIGHT,pygame.time.get_ticks())if -2005 < self.backRect.x < -2000:if self.enemyBoolList[2]:self.enemyBoolList[2] = FalsegenerateEnemy2(MainGame.player1.rect.x + 540, 465)def initBackground(self):# 读取背景图片self.background = pygame.image.load('../Image/Map/1/Background/First(No Bridge).png')self.backRect = self.background.get_rect()self.background = pygame.transform.scale(self.background,(int(self.backRect.width * MAP_SCALE),int(self.backRect.height * MAP_SCALE)))self.backRect.x = -1280def drawLifeImage(self, window):# 如果玩家的生命值大于3，那么生命值图标就显示3个if MainGame.player1.life > 3:number = 3# 否则，有几个显示几个，肯定不超过三个else:number = MainGame.player1.liferect = self.lifeImage.get_rect()# 设置生命值图标的显示位置rect.y = 5for i in range(number):# 每个图标之间的距离为25像素rect.x = 5 + i * 20window.blit(self.lifeImage, rect)if __name__ == '__main__':MainGame().run()

完整敌人1类代码

import randomimport pygame
from Constants import *
from Bullet import Bulletclass Enemy1(pygame.sprite.Sprite):def __init__(self, x, y, direction, currentTime):pygame.sprite.Sprite.__init__(self)self.lastTime = currentTimeself.fireTime = currentTimeself.rightImages = [loadImage('../Image/Enemy/Enemy1/1.png'),loadImage('../Image/Enemy/Enemy1/2.png'),loadImage('../Image/Enemy/Enemy1/3.png')]self.leftImages = [loadImage('../Image/Enemy/Enemy1/1.png', True),loadImage('../Image/Enemy/Enemy1/2.png', True),loadImage('../Image/Enemy/Enemy1/3.png', True)]self.rightFireImage = loadImage('../Image/Enemy/Enemy1/fire.png')self.leftFireImage = loadImage('../Image/Enemy/Enemy1/fire.png', True)self.fallImage = loadImage('../Image/Enemy/Enemy1/fall.png', True)self.rightFireImage = loadImage('../Image/Enemy/Enemy1/fire.png')self.leftFireImage = loadImage('../Image/Enemy/Enemy1/fire.png', True)self.rightFallImage = loadImage('../Image/Enemy/Enemy1/fall.png')self.leftFallImage = loadImage('../Image/Enemy/Enemy1/fall.png', True)self.index = 0self.direction = directionif self.direction == Direction.RIGHT:self.image = self.rightImages[self.index]else:self.image = self.leftImages[self.index]self.rect = self.image.get_rect()self.isFalling = Falseself.rect.x = xself.rect.y = yself.speed = 3self.isDestroy = Falseself.isFiring = Falseself.life = 1self.type = 1def move(self, currentTime):# 首先判断敌人是否开火，如果是开火状态，就不能移动if not self.isFiring:# 没有开火，就根据方向移动，这里我设置敌人只能向一个方向移动，不能转身if self.direction == Direction.RIGHT:self.rect.left += self.speedelse:self.rect.left -= self.speedelse:# 如果此时是开火状态，判断一下上次开火的时间和这次的时间是否相差1000# 这个的作用在于让敌人开火的时候站在那里不动，因为敌人移动时是不能开火的if currentTime - self.fireTime > 1000:# 如果两次开火间隔相差很大，那么就可以让敌人再次开火self.isFiring = Falseself.fireTime = currentTimedef draw(self, currentTime):if self.isFiring:if self.direction == Direction.RIGHT:self.image = self.rightFireImageelse:self.image = self.leftFireImageelse:if currentTime - self.lastTime > 115:if self.index < 2:self.index += 1else:self.index = 0self.lastTime = currentTimeif self.direction == Direction.RIGHT:self.image = self.rightImages[self.index]else:self.image = self.leftImages[self.index]def fire(self, enemyBulletList):if not self.isFalling:i = random.randint(0, 50)if i == 5:if not self.isFiring:self.isFiring = TrueenemyBulletList.append(Bullet(self, True))def checkPosition(self, x, y):if abs(self.rect.x - x) > 1000:self.isDestroy = Trueelif abs(self.rect.y - y) > 600:self.isDestroy = True

完整的敌人2类代码

import math
import randomimport pygame
from Constants import *
from Bullet import Bullet
from PlayerOne import PlayerOneclass Enemy2(pygame.sprite.Sprite):def __init__(self, x, y, direction, currentTime):pygame.sprite.Sprite.__init__(self)self.r = 0.0self.bulletPosition = 0self.rightImage = loadImage('../Image/Enemy/Enemy2/right.png')self.rightUpImage = loadImage('../Image/Enemy/Enemy2/rightUp.png')self.rightDownImage = loadImage('../Image/Enemy/Enemy2/rightDown.png')self.leftImage = loadImage('../Image/Enemy/Enemy2/right.png', True)self.leftUpImage = loadImage('../Image/Enemy/Enemy2/rightUp.png', True)self.leftDownImage = loadImage('../Image/Enemy/Enemy2/rightDown.png', True)self.type = 2if direction == Direction.RIGHT:self.image = self.rightImageelse:self.image = self.leftImageself.rect = self.image.get_rect()self.rect.x = xself.rect.y = yself.center = self.rect.x + self.rect.width / 2, self.rect.y + self.rect.height / 2self.isDestroy = Falseself.isFiring = Falseself.life = 1self.lastTime = currentTimeself.n = 0# 计算时间self.t = 0def getCenter(self):return self.rect.x + self.rect.width / 2, self.rect.y + self.rect.height / 2def draw(self, window: pygame.Surface, player: PlayerOne, currentTime):self.n += 1# 计算时间total = self.t * self.ntotal = total + abs(currentTime - self.lastTime)self.lastTime = currentTimeself.t = total * 1.0 / (self.n + 1)# 获取玩家中心playerCenter = player.getCenter()# 获取敌人中心center = self.getCenter()# 计算距离y = playerCenter[1] - center[1]x = playerCenter[0] - center[0]# 设置存放夹角的变量r = 0# 当 x = 0时，此时玩家在敌人的正上方，我们不做任何操作if x != 0:# 如果玩家在敌人的正上方，计算角度r = math.atan(y / x) * 180 / math.pi# 设置变量，用来记录敌人的姿势，敌人的姿势就是发射子弹时的样子self.bulletPosition = 1# 根据距离的正负关系判断玩家在敌人的左边还是右边if x >= 0:if -45 < r < 45:self.bulletPosition = 2self.image = self.rightImageelif r >= 45:self.bulletPosition = 3self.image = self.rightDownImageelif r <= -45:self.bulletPosition = 1self.image = self.rightUpImageelse:if -45 < r < 45:self.bulletPosition = 5self.image = self.leftImageelif r <= -45:self.bulletPosition = 4self.image = self.leftDownImageelif r >= 45:self.bulletPosition = 6self.image = self.leftUpImageself.r = rwindow.blit(self.image, self.rect)def fire(self, enemyBulletList, player):i = random.randint(0, 30)if i == 5:self.isFiring = TrueenemyBulletList.append(Bullet(self, 2, (self.bulletPosition, player, self.t, self.r)))def checkPosition(self, x, y):if abs(self.rect.x - x) > 2000:self.isDestroy = Trueelif abs(self.rect.y - y) > 600:self.isDestroy = True

完整的子弹类代码

import pygame
from Constants import *
from Explode import Explodeclass Bullet(pygame.sprite.Sprite):def __init__(self, person, enemyType = 0, parameter = None):pygame.sprite.Sprite.__init__(self)self.images = [loadImage('../Image/Bullet/bullet1.png')]self.index = 0# 速度self.xSpeed = 1self.ySpeed = 1self.rect = pygame.Rect(person.rect)# 类型0表示不是敌人if enemyType == 0:if person.isInWater:self.waterPosition(person)else:self.landPosition(person)# 敌人1elif enemyType == 1:self.index = 0if person.direction == Direction.RIGHT:self.rect.x += 27 * PLAYER_SCALEself.rect.y += 7 * PLAYER_SCALEself.ySpeed = 0self.xSpeed = 7else:self.rect.x += -1 * PLAYER_SCALEself.rect.y += 7 * PLAYER_SCALEself.ySpeed = 0self.xSpeed = -7# 敌人2elif enemyType == 2:self.index = 0# 从额外参数中获取敌人的姿势，即子弹的发射位置bulletPosition = parameter[0]# 获取玩家对象player = parameter[1]# 获取玩家中心playerCenter = player.getCenter()# 让人物中心下移if player.isDown or player.isSquating:# 下蹲、蹲下、在水中时，让人物中心下移动，下移动代表y坐标的值相加playerCenter = (playerCenter[0], playerCenter[1] + 8)elif player.isInWater:playerCenter = (playerCenter[0], playerCenter[1] + 15)# 获取子弹移动的时间t = parameter[2]# t *= 15# 获取敌人与玩家连线与水平方向的夹角r = parameter[3]# 根据子弹的发射位置（敌人的姿势）计算敌人的发射子弹的位置和子弹的速度if bulletPosition == 1:self.rect.x += 19 * PLAYER_SCALEself.rect.y += -1 * PLAYER_SCALE# 计算公式，|x0 - x1| / t = vself.ySpeed = - abs(self.rect.y - playerCenter[1]) * 1.0 / tself.xSpeed = abs(self.rect.x - playerCenter[0]) * 1.0 / telif bulletPosition == 2:self.rect.x += 25 * PLAYER_SCALEself.rect.y += 10 * PLAYER_SCALE# s 表示方向这里可以直接根据r的大小，计算出子弹的速度是减少还是增加# 减少表示向负方向移动s = -1if r > 0:s = 1self.ySpeed = s * abs(self.rect.y - playerCenter[1]) * 1.0 / tself.xSpeed = abs(self.rect.x - playerCenter[0]) * 1.0 / telif bulletPosition == 3:self.rect.x += 25 * PLAYER_SCALEself.rect.y += 25 * PLAYER_SCALEself.ySpeed = abs(self.rect.y - playerCenter[1]) * 1.0 / tself.xSpeed = abs(self.rect.x - playerCenter[0]) * 1.0 / telif bulletPosition == 4:self.rect.x += -1 * PLAYER_SCALEself.rect.y += 25 * PLAYER_SCALEself.ySpeed = abs(self.rect.y - playerCenter[1]) * 1.0 / tself.xSpeed = - abs(self.rect.x - playerCenter[0]) * 1.0 / telif bulletPosition == 5:self.rect.x += -1 * PLAYER_SCALEself.rect.y += 10 * PLAYER_SCALEs = 1if r > 0:s = -1self.ySpeed = s * abs(self.rect.y - playerCenter[1]) * 1.0 / tself.xSpeed = - abs(self.rect.x - playerCenter[0]) * 1.0 / telif bulletPosition == 6:self.rect.x += -1 * PLAYER_SCALEself.rect.y += -1 * PLAYER_SCALEself.ySpeed = - abs(self.rect.y - playerCenter[1]) * 1.0 / tself.xSpeed = - abs(self.rect.x - playerCenter[0]) * 1.0 / tself.xSpeed /= 5self.ySpeed /= 5self.image = self.images[self.index]# 销毁开关self.isDestroy = Falsedef landPosition(self, person):if person.isStanding:if person.direction == Direction.RIGHT:if person.isUp:self.rect.x += 10 * PLAYER_SCALEself.rect.y += -1 * PLAYER_SCALEself.ySpeed = -7self.xSpeed = 0else:self.rect.x += 24 * PLAYER_SCALEself.rect.y += 11 * PLAYER_SCALEself.ySpeed = 0self.xSpeed = 7else:if person.isUp:self.rect.x += 10 * PLAYER_SCALEself.rect.y += -1 * PLAYER_SCALEself.ySpeed = -7self.xSpeed = 0else:self.rect.y += 11 * PLAYER_SCALEself.ySpeed = 0self.xSpeed = -7elif person.isSquating and not person.isWalking:if person.direction == Direction.RIGHT:self.rect.x += 34 * PLAYER_SCALEself.rect.y += 25 * PLAYER_SCALEself.ySpeed = 0self.xSpeed = 7else:self.rect.y += 25 * PLAYER_SCALEself.ySpeed = 0self.xSpeed = -7elif person.isWalking:if person.direction == Direction.RIGHT:if person.isUp:self.rect.x += 20 * PLAYER_SCALEself.rect.y += -1 * PLAYER_SCALEself.ySpeed = -7self.xSpeed = 7elif person.isDown:self.rect.x += 21 * PLAYER_SCALEself.rect.y += 20 * PLAYER_SCALEself.ySpeed = 7self.xSpeed = 7else:self.rect.x += 24 * PLAYER_SCALEself.rect.y += 11 * PLAYER_SCALEself.ySpeed = 0self.xSpeed = 7else:if person.isUp:self.rect.x += -3 * PLAYER_SCALEself.rect.y += -1 * PLAYER_SCALEself.ySpeed = -7self.xSpeed = -7elif person.isDown:self.rect.x += -3 * PLAYER_SCALEself.rect.y += 20 * PLAYER_SCALEself.ySpeed = 7self.xSpeed = -7else:self.rect.y += 11 * PLAYER_SCALEself.ySpeed = 0self.xSpeed = -7elif person.isJumping or person.state == State.FALL:if person.direction == Direction.RIGHT:self.rect.x += 16 * PLAYER_SCALEself.rect.y += 8 * PLAYER_SCALEself.ySpeed = 0self.xSpeed = 7else:self.rect.x += -2 * PLAYER_SCALEself.rect.y += 8 * PLAYER_SCALEself.ySpeed = 0self.xSpeed = -7def waterPosition(self, person):if person.isStanding:if person.direction == Direction.RIGHT:if person.isUp:self.rect.x += 14 * PLAYER_SCALEself.rect.y += 7 * PLAYER_SCALEself.ySpeed = -7self.xSpeed = 0else:self.rect.x += 27 * PLAYER_SCALEself.rect.y += 29 * PLAYER_SCALEself.ySpeed = 0self.xSpeed = 7else:if person.isUp:self.rect.x += 7 * PLAYER_SCALEself.rect.y += 3 * PLAYER_SCALEself.ySpeed = -7self.xSpeed = 0else:self.rect.x += -1 * PLAYER_SCALEself.rect.y += 29 * PLAYER_SCALEself.ySpeed = 0self.xSpeed = -7elif person.isWalking:if person.direction == Direction.RIGHT:if person.isUp:self.rect.x += 23 * PLAYER_SCALEself.rect.y += 17 * PLAYER_SCALEself.ySpeed = -7self.xSpeed = 7else:self.rect.x += 27 * PLAYER_SCALEself.rect.y += 29 * PLAYER_SCALEself.ySpeed = 0self.xSpeed = 7else:if person.isUp:self.rect.x += -3 * PLAYER_SCALEself.rect.y += -1 * PLAYER_SCALEself.ySpeed = -7self.xSpeed = -7else:self.rect.x += -1 * PLAYER_SCALEself.rect.y += 29 * PLAYER_SCALEself.ySpeed = 0self.xSpeed = -7def move(self):self.rect.x += self.xSpeedself.rect.y += self.ySpeedself.checkBullet()def draw(self, window):window.blit(self.image, self.rect)def checkBullet(self):toDestroy = Falseif self.rect.top < 0 or self.rect.top > 600:toDestroy = Trueif self.rect.left < 0 or self.rect.right > 900:toDestroy = Trueif toDestroy:self.isDestroy = Truedef collideEnemy(self, enemyList, explodeList):for enemy in enemyList:if pygame.sprite.collide_rect(self, enemy):self.isDestroy = Trueenemy.isDestroy = TrueexplodeList.append(Explode(enemy))def collidePlayer(self, player, explodeList):if pygame.sprite.collide_rect(self, player):# 蹲下的时候，由于图片上半部分是空白，所以子弹必须击中下半部分，才判断为玩家被击中if player.isDown or player.isSquating:x = player.rect.xy = player.rect.y + player.rect.height / 2 + 5if (x < self.rect.x < player.rect.x + player.rect.width) and (y < self.rect.y < player.rect.y + player.rect.height):if player.damage(1):self.isDestroy = TrueexplodeList.append(Explode(player, ExplodeVariety.PLAYER1))return Trueelif player.isInWater:x = player.rect.xy = player.rect.y + player.rect.height / 2if (x < self.rect.x < player.rect.x + player.rect.width) and (y < self.rect.y < player.rect.y + player.rect.height):if player.damage(1):self.isDestroy = TrueexplodeList.append(Explode(player, ExplodeVariety.PLAYER1))return Trueelse:if player.damage(1):self.isDestroy = TrueexplodeList.append(Explode(player, ExplodeVariety.PLAYER1))return Truereturn False