課程設計教學目的：
本課程設計是本專業的一門重要實踐性教學環節.在學習了專業基礎課和《Python程序設計》課程的基礎上,本課程設計旨在加深對Python程序設計的認識,對Python語言及其語言生態有一個進一步的掌握和應用,學會運用Python標准庫及外接相關庫來解決實際問題的基本能力,培養和提高學生分析問題、解決問題的能力,尤其是提高學生使用Python為開發語言來進行問題描述、交流與思考的能力,為畢業設計和以後的工程實踐打下良好的基礎.
本課程設計具體目的：
for a comprehensive understandingPython技術歷史、On the basis of the status quo and development trend,系統掌握Python基本概念、Programming ideas and programming techniques,skilledPythonProgramming skills and technical ideas of object-oriented software design.
From overall framework to page design to code implementation,了解Python設計的一般步驟,並熟練掌握Python的設計思想.
This subject mainly trains logical thinking andPython語法,Write code from big to small,From general to module,master its basic logic,It can be used to draw inferences about future designs,to form logical thinking.
課程設計教學任務和要求：
The main task of this course design is toPython為開發語言完成一個100~300行左右規模的程序項目開發.See appendix for design reference topics1.
課程設計的基本要求是：在課程設計的各個階段嚴格、規范地完成相關的文檔,e.g. overall programme report,詳細設計報告、功能說明、數據結構說明、算法說明、程序設計框圖、Legends and source programs, etc..It is required that the structure of the written document is reasonable、內容完整、敘述清晰.The source code of the program should have detailed comments,可讀性好.更高要求是：有創意、系統界面美觀.
本課程設計具體任務和要求：
I am responsible for the implementation of the game logic.
Vel_yis the speed at which the fish falls in the game,The game every time received a bomb,The expression of a cat will be crying face,At the same time, the life value is reduced by one,When missing fish,Life will be reduced by one,當生命值為0時,游戲結束.
The start of the game page：
game interface：
當Round>2時,will insert bombs：
圖3 bomb interface
良好
總體上來說,The operation of the game basically meets the original design concept,meet design requirements.
Implementation of the specific logic of the game：
pygameEvents can handle various things in the game,pygameThe event processing in is done in a real-time loop.put the code in onewhile True的循環中,But this will create an infinite loop,So add a sentencesys.exit()來退出.
for event in pygame.event.get()
The above code will create a list of currently pending events,然後使用forloop to iterate over the events inside.這樣,We will perform different operations in sequence according to the order in which the events are generated.A common event is a key press,Key release and mouse movement.Usually needs to be processed firstQUIT事件（This event is generated when the user closes the window.）
while True:
for event in pygame.event.get():
if event.type == pygame.QUIT:
pygame.quit()
sys.exit()
pygameSupport some mouse events,他們包括：
MOUSEMOTION,MOUSEBUTTONUP,MOUSEBUTTONDOWN.
在MOUSEMOTIONcontains some properties：event.pos,event.rel,event.buttons
Elif event.type == MOUSEMOTION:
mouse_x,mouse_y = event.pos
move_x,move_y = event.rel
MOUSEBUTTONUP裡面的屬性：
elif event.type == MOUSEBUTTONUP:
if game_over:
game_over = False
lives = 10
score = 0
Round =1
vel_y=0.4
mine=0
flag=0
pic=cat
bomb_y = -50
在pygame中,使用pygame.key.get_pressed()來輪詢鍵盤接口.This method returns a list of boolean values,where one flag per key.Use key constant values to match key presses,This has the advantage of being able to detect multiple key presses without having to traverse the event system.
keys = pygame.key.get_pressed()
if keys[K_ESCAPE]:
sys.exit()
if game_over:
screen.blit(init,(60, 60))
print_text(font3, 200, 400,"Clicked To Play!")
print_text(font2, 310, 480,"[email protected] developed by xiaoxiami")
圖4 游戲結束頁面
else:
#Round setting
if score >300 and score <600:
Round=2
elif score >600 and score <900:
Round =3
elif score >900 and score <1200:
Round=4
elif score >1200 and score <1500:
Round =5
elif score >=1500:
Round =6
#draw the Round
print_text(font1, 280, 0, "Round: " + str(Round))
#speed setting
if Round ==1:
vel_y=0.4
elif Round ==2:
vel_y=0.6
elif Round ==3:
vel_y=0.8
elif Round ==4:
vel_y=1.0
elif Round ==5:
vel_y=1.2
If you miss the fish,just reset the fish's position,give it a randomx值,Then the life value is reduced by one：
if bomb_y > 500:
bomb_x = random.randint(0, 500)
bomb_y = -50
lives -= 1
if lives == 0:
game_over = True
Simple collision detection function,Check to see if the fish is caught：
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
The detection of the same bomb is similar to this：
if mine_y > 500:
mine_x = random.randint(0, 500)
mine_y = -50
In order to control the coordinates of the cat not to exceed the screen range,加入了以下代碼：
pos_x = mouse_x
if pos_x < 0:
pos_x = 0
elif pos_x > 510:
pos_x = 500
cat getting bomb.or health less than5的時候,will become crying,So we also need to load a bitmap of the crying face,Then add some corresponding logic code to the program：
Load the cat's crying face bitmap：
cat2=pygame.image.load("aodamiao_3.png")
when the bomb,cat becomes crying face：
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
When the cat's life value is less than5時,cat becomes crying face：
if lives<5:
pic=cat2
try...except...finally...
Used to determine whether the cat's position is beyond the game window：
try:
print("開始執行try...")
mouse_x>0
mouse_x<510
except ZeroDivisionError as e:
print(“cat out of range”)
finally:
print("執行finally...")
print("END...")
通過print Output variables that may be wrong,through error messages andprint to modify the outputbug,printAlso need to delete after the test is done
pdb
啟動Python的單步調試器pdb,The program is executed line by line.可以采用pdb.set_trace()在代碼中設置斷點
