pygame 神庙逃亡

游戏规则

用pygame动画实现神庙逃亡类似的小游戏，当玩家移动的时候躲避子弹，如果子弹命中玩家或者名字龙都会减速，玩家躲避子弹使更多的子弹打在龙上，当玩家被龙抓到，则游戏输，如果龙被子弹减少速度，与玩家有一定的距离，则玩家获胜。

精灵类

class MySprite(pygame.sprite.Sprite):def __init__(self, target):pygame.sprite.Sprite.__init__(self)  self.master_image = Noneself.frame = 0self.old_frame = -1self.frame_width = 1self.frame_height = 1self.first_frame = 0self.last_frame = 0self.columns = 1self.last_time = 0 def _getx(self):return self.rect.xdef _setx(self, value):self.rect.x = valueX = property(_getx, _setx)def _gety(self):return self.rect.ydef _sety(self, value):self.rect.y = valueY = property(_gety, _sety)def _getpos(self):return self.rect.topleftdef _setpos(self, pos):self.rect.topleft = posposition = property(_getpos, _setpos)def load(self, filename, width, height, columns):self.master_image = pygame.image.load(filename).convert_alpha()self.frame_width = widthself.frame_height = heightself.rect = Rect(0, 0, width, height)self.columns = columnsrect = self.master_image.get_rect()self.last_frame = (rect.width // width) * (rect.height // height) - 1def update(self, current_time, rate=30):if current_time > self.last_time + rate:self.frame += 1if self.frame > self.last_frame:self.frame = self.first_frameself.last_time = current_timeif self.frame != self.old_frame:frame_x = (self.frame % self.columns) * self.frame_widthframe_y = (self.frame // self.columns) * self.frame_heightrect = pygame.Rect(frame_x, frame_y, self.frame_width, self.frame_height)self.image = self.master_image.subsurface(rect)self.old_frame = self.framedef __str__(self):return str(self.frame) + "," + str(self.first_frame) + \"," + str(self.last_frame) + "," + str(self.frame_width) + \"," + str(self.frame_height) + "," + str(self.columns) + \"," + str(self.rect)

MySprite继承精灵类，因为在做动画时候，需要许多的参数，这里进行了初始化，master_image 图片的位置，frame、old_frame分别储存第一帧和上一帧的位置，frame_width和frame_height保存宽高，first和last保存帧的第一帧和最后一帧。columns保存列数。last_time时间变量。
X、Y、pos保存精灵的位置x和y的位置。

load载入，赋予对应精灵的值，(rect.width // width) * (rect.height // height) - 1，通过给定的图片的宽高除以参数的值，-1就是初始的位置是从0开始的。

update更新的时候，根据传入的时间和间隔频率，如果时间大于上次时间和间隔则改变帧数，如果帧数改变对应的图片位置也改变，实现动态变化。

加载龙

dragon = MySprite(screen)
dragon.load("dragon.png", 260, 150, 3)
dragon.position = 100, 230
group.add(dragon)arrow_vel = 8.0
game_over = False
you_win = False
player_jumping = False
jump_vel = 0.0while True:framerate.tick(30)ticks = pygame.time.get_ticks()for event in pygame.event.get():if event.type == pygame.QUIT:sys.exit()keys = pygame.key.get_pressed()if keys[pygame.K_ESCAPE]:sys.exit()elif keys[pygame.K_SPACE]:if not player_jumping:player_jumping = Truejump_vel = -8.0screen.blit(bg, (0, 0))if not game_over:group.update(ticks, 50)group.draw(screen)print_text(font, 350, 360, "Press SPACE to jump!")if game_over:print_text(font, 360, 100, "G A M E O V E R")if you_win:print_text(font, 330, 130, "YOU BEAT THE DRAGON")else:print_text(font, 330, 130, "THE DRAGON GOT YOU")pygame.display.update()

加载龙，实现龙动画，这里没有龙的位移，玩家躲子弹或者命中子弹都会导致双方的x坐标减少，这里没使用对应的速度改变，减少游戏的开发难度。

加载子弹

def reset_arrow():y = random.randint(250, 350)arrow.position = 800, yarrow = MySprite(screen)
arrow.load("flame.png", 40, 16, 1)
arrow.position = 800, 320
group.add(arrow)

子弹因为只有一个，如果击中则需要重置，这里写了重置子弹的函数便于调用，random.randint(250, 350)给子弹一个随机的高度。使游戏与变化。

添加玩家

player = MySprite(screen)
player.load("caveman.png", 50, 64, 8)
player.first_frame = 1
player.last_frame = 7
player.position = 400, 303
group.add(player)player_start_y = player.Y

player_start_y记录玩家初始的y坐标判断玩家是否处于跳跃状态中。

碰撞事件

    if not game_over:arrow.X -= arrow_velif arrow.X < 40:reset_arrow()if pygame.sprite.collide_rect(arrow, player):reset_arrow()player.X -= 10if pygame.sprite.collide_rect(arrow, dragon):reset_arrow()dragon.X -= 10if pygame.sprite.collide_rect(player, dragon):game_over = Trueif dragon.X < -100:you_win = Truegame_over = Trueif player_jumping:player.Y += jump_veljump_vel += 0.5if player.Y > player_start_y:player_jumping = Falseplayer.Y = player_start_yjump_vel = 0.0

这里需要检验玩家、子弹和龙两两相碰的事件。

完整代码

import sys, time, random, math, pygame
from pygame.locals import *class MySprite(pygame.sprite.Sprite):def __init__(self, target):pygame.sprite.Sprite.__init__(self)  # extend the base Sprite classself.master_image = Noneself.frame = 0self.old_frame = -1self.frame_width = 1self.frame_height = 1self.first_frame = 0self.last_frame = 0self.columns = 1self.last_time = 0# X propertydef _getx(self):return self.rect.xdef _setx(self, value):self.rect.x = valueX = property(_getx, _setx)# Y propertydef _gety(self):return self.rect.ydef _sety(self, value):self.rect.y = valueY = property(_gety, _sety)# position propertydef _getpos(self):return self.rect.topleftdef _setpos(self, pos):self.rect.topleft = posposition = property(_getpos, _setpos)def load(self, filename, width, height, columns):self.master_image = pygame.image.load(filename).convert_alpha()self.frame_width = widthself.frame_height = heightself.rect = Rect(0, 0, width, height)self.columns = columns# try to auto-calculate total framesrect = self.master_image.get_rect()self.last_frame = (rect.width // width) * (rect.height // height) - 1def update(self, current_time, rate=30):# update animation frame numberif current_time > self.last_time + rate:self.frame += 1if self.frame > self.last_frame:self.frame = self.first_frameself.last_time = current_time# build current frame only if it changedif self.frame != self.old_frame:frame_x = (self.frame % self.columns) * self.frame_widthframe_y = (self.frame // self.columns) * self.frame_heightrect = pygame.Rect(frame_x, frame_y, self.frame_width, self.frame_height)self.image = self.master_image.subsurface(rect)self.old_frame = self.framedef __str__(self):return str(self.frame) + "," + str(self.first_frame) + \"," + str(self.last_frame) + "," + str(self.frame_width) + \"," + str(self.frame_height) + "," + str(self.columns) + \"," + str(self.rect)def print_text(font, x, y, text, color=(255, 255, 255)):imgText = font.render(text, True, color)screen.blit(imgText, (x, y))def reset_arrow():y = random.randint(250, 350)arrow.position = 800, ypygame.init()
screen = pygame.display.set_mode((800, 600))
pygame.display.set_caption("Escape Dragon")
font = pygame.font.Font(None, 18)
framerate = pygame.time.Clock()bg = pygame.image.load('background.png').convert_alpha()group = pygame.sprite.Group()dragon = MySprite(screen)
dragon.load("dragon.png", 260, 150, 3)
dragon.position = 100, 230
group.add(dragon)player = MySprite(screen)
player.load("caveman.png", 50, 64, 8)
player.first_frame = 1
player.last_frame = 7
player.position = 400, 303
group.add(player)arrow = MySprite(screen)
arrow.load("flame.png", 40, 16, 1)
arrow.position = 800, 320
group.add(arrow)arrow_vel = 8.0
game_over = False
you_win = False
player_jumping = False
jump_vel = 0.0
player_start_y = player.Ywhile True:framerate.tick(30)ticks = pygame.time.get_ticks()for event in pygame.event.get():if event.type == pygame.QUIT:sys.exit()keys = pygame.key.get_pressed()if keys[pygame.K_ESCAPE]:sys.exit()elif keys[pygame.K_SPACE]:if not player_jumping:player_jumping = Truejump_vel = -8.0if not game_over:arrow.X -= arrow_velif arrow.X < 40:reset_arrow()if pygame.sprite.collide_rect(arrow, player):reset_arrow()player.X -= 10if pygame.sprite.collide_rect(arrow, dragon):reset_arrow()dragon.X -= 10if pygame.sprite.collide_rect(player, dragon):game_over = Trueif dragon.X < -100:you_win = Truegame_over = Trueif player_jumping:player.Y += jump_veljump_vel += 0.5if player.Y > player_start_y:player_jumping = Falseplayer.Y = player_start_yjump_vel = 0.0screen.blit(bg, (0, 0))if not game_over:group.update(ticks, 50)group.draw(screen)print_text(font, 350, 360, "Press SPACE to jump!")if game_over:print_text(font, 360, 100, "G A M E O V E R")if you_win:print_text(font, 330, 130, "YOU BEAT THE DRAGON")else:print_text(font, 330, 130, "THE DRAGON GOT YOU")pygame.display.update()