【python遊戲編程之旅】第五篇---嗷大喵愛吃魚小遊戲開發實例

本系列博客介紹以python+pygame庫進行小遊戲的開發。有寫的不對之處還望各位海涵。

 

咱們一同在前幾期的博客中已經學到了不少pygame的基本知識了，如今該作個小遊戲實戰一下了。

前幾期博客連接：

第一篇：初識pygame  http://www.cnblogs.com/msxh/p/4966899.html

第二篇：pygame中的IO、數據  http://www.cnblogs.com/msxh/p/4973003.html

第三篇：pygame事件與設備輪詢  http://www.cnblogs.com/msxh/p/4979380.html

第四篇：pygame中加載位圖及些經常使用的數學函數  http://www.cnblogs.com/msxh/p/4990435.html

 

本次咱們要作一個很簡單的小遊戲：從天上會隨機的掉下魚，你須要使用鼠標操縱貓去接住魚，丟失一條魚損失一條命，一共有10條命，同時還要避免接到炸彈。接住魚會有積分。

遊戲效果圖以下：

 

遊戲下載地址：http://pan.baidu.com/s/1qWA4xZ2

源代碼下載地址：http://pan.baidu.com/s/1i3is15j

 

仍是先上一下完整的源代碼吧：

  1 # -*-coding:utf-8-*- s = '
  2 #AoDaMiao Like Eating Fish
  3 import sys, random, time, pygame
  4 from pygame.locals import *
  5 
  6 def print_text(font, x, y, text, color=(255,255,255)):
  7     imgText = font.render(text, True, color)
  8     screen.blit(imgText, (x,y))
  9     
 10 
 11 #main program begins
 12 pygame.init()
 13 screen = pygame.display.set_mode((600,500))
 14 pygame.display.set_caption("嗷大喵愛吃魚！")
 15 font1 = pygame.font.Font(None, 24)
 16 font2 = pygame.font.Font(None, 18)
 17 font3 = pygame.font.Font(None, 34)
 18 pygame.mouse.set_visible(False)
 19 white = 255,255,255
 20 red = 220, 50, 50
 21 yellow = 230,230,50
 22 black = 0,0,0
 23 cat=pygame.image.load("aodamiao_2.png")
 24 width,height=cat.get_size()
 25 pic=pygame.transform.scale(cat,(width,height))
 26 fish=pygame.image.load("fish.png")
 27 width,height=fish.get_size()
 28 fish=pygame.transform.smoothscale(fish,(width//3,height//3))
 29 init=pygame.image.load("init.png")
 30 lives = 10
 31 score = 0
 32 clock_start = 0
 33 game_over = 1
 34 mouse_x = mouse_y = 0
 35 Round =1
 36 mine=0
 37 mine_png=pygame.image.load("mine.png")
 38 cat2=pygame.image.load("aodamiao_3.png")
 39 flag=0
 40 
 41 pos_x = 300
 42 pos_y = 410-40
 43 
 44 bomb_x = random.randint(0,500)
 45 mine_x=random.randint(0,500)
 46 bomb_y = -50
 47 vel_y = 0.4
 48 vel_yy=0.6
 49 mine_y=-100
 50 
 51 #repeating loop
 52 while True:
 53     for event in pygame.event.get():
 54         if event.type == pygame.QUIT:
 55             #sys.exit()
 56             pygame.quit()
 57             exit()
 58         elif event.type == MOUSEMOTION:
 59             mouse_x,mouse_y = event.pos
 60             move_x,move_y = event.rel
 61         elif event.type == MOUSEBUTTONUP:
 62             if game_over:
 63                 game_over = False
 64                 lives = 10
 65                 score = 0
 66                 Round =1
 67                 vel_y=0.4
 68                 mine=0
 69                 flag=0
 70                 pic=cat
 71                 bomb_y = -50
 72 
 73     keys = pygame.key.get_pressed()
 74     if keys[K_ESCAPE]:
 75         sys.exit()
 76 
 77     screen.fill((0,0,100))
 78 
 79     if game_over:
 80         screen.blit(init,(60, 60))
 81         print_text(font3, 200, 400,"Clicked To Play!")
 82         print_text(font2, 310, 480,"Copyright@2015 developed by xiaoxiami")
 83     else:
 84         #Round setting
 85         if score >300 and score <600:
 86              Round=2
 87         elif score >600 and score <900:
 88              Round =3
 89         elif score >900 and score <1200:
 90              Round=4
 91         elif score >1200 and score <1500:
 92              Round =5
 93         elif score >=1500:
 94              Round =6
 95         #draw the Round
 96         print_text(font1, 280, 0, "Round: " + str(Round))
 97         #speed setting
 98         if Round ==1:
 99             vel_y=0.4
100         elif Round ==2:
101             vel_y=0.6
102         elif Round ==3:
103             vel_y=0.8
104         elif Round ==4:
105             vel_y=1.0
106         elif Round ==5:
107             vel_y=1.2
108         #mine number setting
109         #mine=random.randint(1,9)
110         #move the fish
111         bomb_y += vel_y
112         mine_y+=vel_yy
113 
114         #has the player missed the fish?
115         if bomb_y > 500:
116             bomb_x = random.randint(0, 500)
117             bomb_y = -50
118             lives -= 1
119             if lives == 0:
120                 game_over = True
121         #see if player has caught the fish
122         elif bomb_y > pos_y:
123             if bomb_x > pos_x-10 and bomb_x < pos_x + 70:
124                 score += 10
125                 bomb_x = random.randint(0, 500)
126                 bomb_y = -50
127         if Round >2:
128         #has the player missed the mine?
129             if mine_y > 500:
130                 mine_x = random.randint(0, 500)
131                 mine_y = -50
132         #see if player has caught the mine
133             elif mine_y > pos_y:
134                 if mine_x > pos_x and mine_x < pos_x + 40:
135                     mine_x = random.randint(0, 500)
136                     mine_y = -50
137                     lives-=1
138                     pic=cat2
139                     if lives == 0:
140                         game_over = True
141        
142         #draw the fish
143         screen.blit(fish,(bomb_x,int(bomb_y)))
144         #draw the mine
145         if Round >2:
146             screen.blit(mine_png,(mine_x,int(mine_y)))
147 
148         #set cat position
149         pos_x = mouse_x
150         if pos_x < 0:
151             pos_x = 0
152         elif pos_x > 510:
153             pos_x = 500
154         #draw cat
155         if lives<5:
156             pic=cat2
157         screen.blit(pic,(pos_x,pos_y))
158 
159     #print # of lives
160     print_text(font1, 0, 0, "LIVES: " + str(lives))
161 
162     #print score
163     print_text(font1, 500, 0, "SCORE: " + str(score))
164     
165     pygame.display.update()
166 
167     

關於位圖的加載，設備輪詢等等的內容咱們就不在這裏贅述了，不熟悉的能夠查看前幾期的博客。

爲了讓遊戲更有趣味性，咱們設置一下魚的速度是能夠變的。當獲得的分數在不一樣區間的時候，會有不一樣的速度。（速度會越來快。）詳見代碼83-107行。

爲了判斷玩家是否錯過魚或者接到魚，咱們還須要寫一個簡單的碰撞檢測函數：

        #若是錯過魚的話，就重置魚的位置，給它一個隨機的x值，而後生命值   減一
        if bomb_y > 500:
            bomb_x = random.randint(0, 500)
            bomb_y = -50
            lives -= 1
            if lives == 0:
                game_over = True
        #簡單碰撞檢測函數，查看是否接住魚
        elif bomb_y > pos_y:
            if bomb_x > pos_x-10 and bomb_x < pos_x + 70:
                score += 10
                bomb_x = random.randint(0, 500)
                bomb_y = -50

同理炸彈的檢測和這個是相似的。

 

if bomb_y > 500:
            bomb_x = random.randint(0, 500)
            bomb_y = -50
            lives -= 1
            if lives == 0:
                game_over = True

爲了控制貓的座標不超出屏幕範圍，咱們加入了以下的代碼：

        pos_x = mouse_x
        if pos_x < 0:
            pos_x = 0
        elif pos_x > 510:
            pos_x = 500

貓在接到炸彈。或者生命值小於5的時候，會變成哭臉，所以咱們還須要加載一張哭臉的位圖，而後在程序中添加一些相應的邏輯代碼：

#加載貓的哭臉位圖
cat2=pygame.image.load("aodamiao_3.png")
#當接到炸彈的時候，貓變成哭臉
elif mine_y > pos_y:
                if mine_x > pos_x and mine_x < pos_x + 40:
                    mine_x = random.randint(0, 500)
                    mine_y = -50
                    lives-=1
                    pic=cat2
                    if lives == 0:
                        game_over = True

#當貓的生命值小於5時，貓變成哭臉
        if lives<5:
            pic=cat2

最後咱們可使用py2exe將其打包成exe併發布。py2exe打包流程請看這裏：http://www.cnblogs.com/msxh/p/4886628.html

 

經過這個十分簡陋的遊戲，咱們大概回顧了一下以前學到的知識。（遊戲至關的簡陋了，連聲音都沒有。。。）

下個博客咱們將深刻學習pygame中的Sprite（精靈）模塊，而且瞭解如何加載動畫和Sprite中的碰撞檢測函數。