100行Pygame程式碼 製作一個貪吃蛇小遊戲
目錄
- 用到的 Pygame 函式
- 建立螢幕
- 建立 snake
- 使 snake 動起來
- 處理 Game Over
- 增加食物
- snake 的成長
- 展示得分
用到的 Pygame 函式
貪吃蛇小遊戲用到的函式
功能 | 描述 |
---|---|
init() | 初始化 pygame |
display.set_mode() | 以元組或列表為引數建立視窗 |
update() | 更新螢幕 |
quit() | 用於取消初始化的 pygame |
set_caption() | 在螢幕的頂部設定文字 |
event.get() | 返回所有事件的列表 |
Surface.fill() | 使用純色填充螢幕 |
time.Clock() | 追蹤時間 |
font.Font() | 設定字型 |
建立螢幕
我們使用函式 display.set_mode()
來建立 pygame
視窗,同時我們還要在程式的開始和結尾處進行 init()
和 quit()
函式,以保證程式可以正確開始和結束。
import pygame pygame.init() dis=pygame.display.set_mode((400,300)) pygame.display.update() pygame.quit() quit()
這要我們執行程式,就可以得到如下:
但是這要的程式碼,我們的程式建立只會一閃而過,下面我們增加一些程式碼,來保持住程式視窗
import pygame pygame.init() dis=pygame.display.set_mode((400,300)) pygame.display.update() pygame.display.set_caption('Snake game by Edureka') game_over=False while not game_over: for event in pygame.event.get(): print(event) # 打印出所有事件 pygame.quit() quit()
我們增加了遊戲視窗的名稱,同時還可以在
控制檯中看到我們在 pygame
視窗上操作時的所有事件
下面我們來增加關閉響應事件
pygame.init() dis = pygame.display.set_mode((400,300)) pygame.display.update() pygame.display.set_caption('貪吃蛇') game_over = False while not game_over: for event in pygame.event.get(): if event.type==pygame.QUIT: game_over=True pygame.quit() quit()
至此我們的遊戲視窗就設定好了,下面就可以來畫 snake
了
建立 snake
我們首先建立一些顏色變數,用來表示 snake
,food
,screen
等
pygame.init() dis = pygame.display.set_mode((400,300)) pygame.display.update() pygame.display.set_caption('貪吃蛇') blue=(0,255) red=(255,0) game_over = False while not game_over: for event in pygame.event.get(): if event.type==pygame.QUIT: game_over=True pygame.draw.rect(dis,blue,[200,150,10,10]) pygame.display.update() pygame.quit() quit()
這樣,一隻(條)貪吃蛇就建立完成了,就是那個小藍點兒
使 snake 動起來
為了實現 snake
的移動,我們需要用到的關鍵事件是 KEYDOWN,它包含四個 key 值,K_UP,K_DOWN,K_LEFT,和 K_RIGHT,分別表示向上、向下、向左和向右
pygame.init() pygame.display.set_caption('貪吃蛇') white = (255,255,255) black = (0,0) red = (255,0) dis = pygame.display.set_mode((800,600)) game_over = False x1 = 300 y1 = 300 x1_change = 0 y1_change = 0 clock = pygame.time.Clock() while not game_over: for event in pygame.event.get(): if event.type == pygame.QUIT: game_over = True if event.type == pygame.KEYDOWN: if event.key == pygame.K_LEFT: x1_change = -10 y1_change = 0 elif event.key == pygame.K_RIGHT: x1_change = 10 y1_change = 0 elif event.key == pygame.K_UP: y1_change = -10 x1_change = 0 elif event.key == pygame.K_DOWN: y1_change = 10 x1_change = 0 x1 += x1_change y1 += y1_change dis.fill(white) pygame.draw.rect(dis,black,[x1,y1,10]) pygame.display.update() clock.tick(30) pygame.quit() quit()
我這裡建立了 x1_change
和 y1_change
變數來更新 x 和 y 座標,使得我們的 snake 可以移動起來
處理 Game Over
對於貪吃蛇遊戲來說,如果 snake
移動出了遊戲螢幕,那麼遊戲就已經失敗了,下面我們就來處理這部分邏輯
import pygame
import time
pygame.init()
pygame.display.set_caption('貪吃蛇')
white = (255,0)
dis_width = 600
dis_height = 400
dis = pygame.display.set_mode((dis_width,dis_width))
game_over = False
x1 = dis_width / 2
y1 = dis_height / 2
snake_block = 10
x1_change = 0
y1_change = 0
clock = pygame.time.Clock()
snake_speed = 30
font_style = pygame.font.Font("C:IoefrUE/Windows/Fonts/STFANGSO.TTF",20)
def message(msg,color):
mesg = font_style.render(msg,True,color)
dis.blit(mesg,[dis_width / 2,dis_height / 2])
while not game_over:
for evehttp://www.cppcns.comnt in pygame.event.get():
if event.type == pygaIoefrUEme.QUIT:
game_over = True
if event.type == pygame.KEYDOWN:
if event.key == pygame.K_LEFT:
x1_change = -snake_block
y1_change = 0
elif event.key == pygame.K_RIGHT:
x1_change = snake_block
y1_change = 0
elif event.key == pygame.K_UP:
y1_change = -snake_block
x1_change = 0
elif event.key == pygame.K_DOWN:
y1_change = snake_block
x1_change = 0
if x1 >= dis_width or x1 < 0 or y1 >= dis_height or y1 < 0:
game_over = True
x1 += x1_change
y1 += y1_change
dis.fill(white)
pygame.draw.rect(dis,snake_block,snake_block])
pygame.display.update()
clock.tick(snake_speed)
message("你失敗了,請重新開始遊戲!",red)
pygame.display.update()
time.sleep(2)
pygame.quit()
quit()
增加食物
既然是貪吃蛇,當然要投食了,下面我們就來處理食物
import pygame import time import random pygame.init() pygame.display.set_caption('貪吃蛇') white = (255,0) blue = (0,255) dis_width = 800 dis_height = 600 dis = pygame.display.set_mode((dis_width,dis_height)) clock = pygame.time.Clock() snake_block = 10 snake_speed = 30 font_style = pygame.font.Font("C:/Windows/Fonts/STFANGSO.TTF",[dis_width / 3,dis_height / 3]) def gameLoop(): # creating a function game_over = False game_close = False x1 = dis_width / 2 y1 = dis_height / 2 x1_change = 0 y1_change = 0 foodx = round(random.randrange(0,dis_width - snake_block) / 10.0) * 10.0 foody = round(random.randrange(0,dis_width - snake_block) / 10.0) * 10.0 while not game_over: while game_close == True: dis.fill(white) message("你失敗了,請重新開始遊戲!",red) pygame.display.update() for event in pygame.event.get(): if event.type == pygame.KEYDOWN: if event.key == pygame.K_q: game_over = True game_close = False if event.key == pygame.K_c: gameLoop() for event in pygame.event.get(): if event.type == pygame.QUIT: game_over = True if event.type == pygame.KEYDOWN: if event.key == pygame.K_LEFT: x1_change = -snake_block y1_change = 0 elif event.key == pygame.K_RIGHT: x1_change = snake_block y1_change = 0 elif event.key == pygame.K_UP: y1_change = -snake_block x1_change = 0 elif event.key == pygame.K_DOWN: y1_change = snake_block x1_change = 0 if x1 >= dis_width or x1 < 0 or y1 >= dis_height or y1 < 0: game_close = True x1 += x1_change y1 += y1_change dis.fill(white) pygame.draw.rect(dis,[foodx,foody,snake_block]) pygame.draw.rect(dis,snake_block]) pygame.display.update() if x1 == foodx and y1 == foody: print("Good!") clock.tick(snake_speed) pygame.quit() quit() gameLoop()
我這裡建立了一個函式 gameLoop
作為我們的主函式,同時還初始化了 snake 的食物,還同時增加了鍵盤 c 和 q 關鍵字,來重新開始遊戲和退出遊戲
snake 的成長
下面我們就開始在 snake
吃掉食物之後,增加 snake 的長度,這也是遊戲的基本規則
import pygame import time import random pygame.init() pygame.display.set_caption('貪吃蛇') font_style = pygame.font.Font("C:/Windows/Fonts/STFANGSO.TTF",20) score_font = pygame.font.Font("C:/Windows/Fonts/STCAIYUN.TTF",30) white = (255,255) yellow = (255,102) black = (0,0) red = (213,50,80) green = (0,IoefrUE255,0) blue = (50,153,213) dis_width = 600 dis_height = 400 dis = pygame.display.set_mode((dis_width,dis_height)) clock = pygame.time.Clock() snake_block = 10 snake_speed = 15 def our_snake(snake_block,snake_list): for x in snake_list: pygame.draw.rect(dis,[x[0],x[1],snake_block]) def message(msg,[dis_width / 6,dis_height / 3]) def gameLoop(): game_over = False game_close = False x1 = dis_width / 2 y1 = dis_height / 2 x1_change = 0 y1_change = 0 snake_List = [] Length_of_snake = 1 foodx = round(random.randrange(0,dis_height - snake_block) / 10.0) * 10.0 while not game_over: while game_close == True: dis.fill(blue) message("你失敗了,請重新開始遊戲!",red) pygame.display.update() for event in pygame.event.get(): if event.type == pygame.KEYDOWN: if event.key == pygame.K_q: game_over = True game_close = False if event.key == pygame.K_c: gameLoop() for event in pygame.event.get(): if event.type == pygame.QUIT: game_over = True if event.type == pygame.KEYDOWN: if event.key == pygame.K_LEFT: x1_change = -snake_block y1_change = 0 elif event.key == pygame.K_RIGHT: x1_change = snake_block y1_change = 0 elif event.key == pygame.K_UP: y1_change = -snake_block x1_change = 0 elif event.key == pygame.K_DOWN: y1_change = snake_block x1_change = 0 if x1 >= dis_width or x1 < 0 or y1 >= dis_height or y1 < 0: game_close = True x1 += x1_change y1 += y1_change dis.fill(blue) IoefrUE pygame.draw.rect(dis,green,snake_block]) snake_Head = [] snake_Head.append(x1) snake_Head.append(y1) snake_List.append(snake_Head) if len(snake_List) > Length_of_snake: del snake_List[0] for x in snake_List[:-1]: if x == snake_Head: game_close = True our_snake(snake_block,snake_List) pygame.display.update() if x1 == foodx and y1 == foody: foodx = round(random.randrange(0,dis_width - snake_block) / 10.0) * 10.0 foody = round(random.randrange(0,dis_height - snake_block) / 10.0) * 10.0 Length_of_snake += 1 clock.tick(snake_speed) pygame.quit() quit() gameLoop()
展示得分
最後我們來顯示得分,畢竟對於遊戲來說,玩家的得分還是很重要的
import pygame import time import random pygame.init() pygame.display.set_caption('貪吃蛇') font_style = pygame.font.Font("C:/Windows/Fonts/STFANGSO.TTF",dis_height)) clock = pygame.time.Clock() snake_block = 10 snake_speed = 15 def Your_score(score): value = score_font.render("Your Score: " + str(score),yellow) dis.blit(value,[0,0]) def our_snake(snake_block,red) Your_score(Length_of_snake - 1) pygame.display.update() for event in pygame.event.get(): if event.type == pygame.KEYDOWN: if event.key == pygame.K_q: game_over = True game_close = False if event.key == pygame.K_c: gameLoop() for event in pygame.event.get(): if event.type == pygame.QUIT: game_over = True if event.type == pygame.KEYDOWN: if event.key == pygame.K_LEFT: x1_change = -snake_block y1_change = 0 elif event.key == pygame.K_RIGHT: x1_change = snake_block y1_change = 0 elif event.key == pygame.K_UP: y1_change = -snake_block x1_change = 0 elif event.key == pygame.K_DOWN: y1_change = snake_block x1_change = 0 if x1 >= dis_width or x1 < 0 or y1 >= dis_height or y1 < 0: game_close = True x1 += x1_change y1 += y1_change dis.fill(blue) pygame.draw.rect(dis,snake_List) Your_score(Length_of_snake - 1) pygame.display.update() if x1 == foodx and y1 == foody: foodx = round(random.randrange(0,dis_height - snake_block) / 10.0) * 10.0 Length_of_snake += 1 clock.tick(snake_speed) pygame.quit() quit() gameLoop()
這裡建立了一個 Your_score 函式來記錄玩家得分
這樣,我們就完成了一個簡易的貪吃蛇小遊戲了
最後的最後,我們再給遊戲新增音樂背景,讓遊戲的時光更加愜意吧
# 播放音樂 pygame.init() pygame.mixer.music.load(r"Game.mp3") pygame.mixer.music.play()
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