第二次做業 貪吃蛇遊戲改進

• 學號：2017035107002
• 姓名：班雪

        2.

• 所作工做                        預計時間                  實際消耗時間
• 分析遊戲不足                   5min                               6min
• 對代碼進行分析               10min                             9min
• 對代碼進行改進                8min                              7min
• 測試                                  2min                              2min
• 生成報告                           10min                           15min

       3.博客給出了遊戲改進想法及需求分析與設計

       1.遊戲界面的優化。把蛇頭改成綠色，把食物改成紅色

　　2.遊戲分數調整，把原來的1個食物100分改成1個食物10分，增長可玩性。

　　3.結束語修改成You Lose

　　4.把分數該爲顯示在右上角

四、主要代碼

import pygame
import time
import numpy as np
# 此模塊包含遊戲所需的常量
from pygame.locals import *

# 設置棋盤的長寬
BOARDWIDTH = 48
BOARDHEIGHT = 28
# 分數
score = 0

# 食物
class Food(object):
def __init__(self):
self.item = (4, 5)

# 畫出食物
def _draw(self, screen, i, j):
color = 255, 0, 0
radius = 10
width = 10
# i:1---34 j:1---25
position = 10 + 20 * i, 10 + 20 * j
# 畫出半徑爲 10 的粉色實心圓
pygame.draw.circle(screen, color, position, radius, width)

# 隨機產生食物
def update(self, screen, enlarge, snake):
if enlarge:
self.item = np.random.randint(1, BOARDWIDTH - 2), np.random.randint(1, BOARDHEIGHT - 2)
while self.item in snake.item:
self.item = np.random.randint(1, BOARDWIDTH - 2), np.random.randint(1, BOARDHEIGHT - 2)
self._draw(screen, self.item[0], self.item[1])

# 貪吃蛇
class Snake(object):
def __init__(self):
# self.item = [(3, 25), (2, 25), (1, 25), (1,24), (1,23),
# (1,22), (1,21), (1,20), (1,19), (1,18), (1,17), (1,16)]
# x 水平方向 y 豎直方向
# 初始方向豎直向上
self.item = [(3, 25), (2, 25), (1, 25), (1, 24), ]
self.x = 0
self.y = -1

def move(self, enlarge):
# enlarge 標記貪吃蛇有沒有吃到食物
if not enlarge:
# 沒吃到食物刪除尾部元素
self.item.pop()
# 新蛇頭的座標爲舊蛇頭座標加上移動方向的位移
head = (self.item[0][0] + self.x, self.item[0][1] + self.y)
# 將新的蛇頭座標插入在 list 最前面
self.item.insert(0, head)

def eat_food(self, food):
global score
# snake_x,snake_y 蛇頭座標
# food_x, food_y 食物座標
snake_x, snake_y = self.item[0]
food_x, food_y = food.item
# 比較蛇頭座標與食物座標
if (food_x == snake_x) and (food_y == snake_y):
score += 10
return 1
else:
return 0

def toward(self, x, y):
# 改變蛇頭朝向
if self.x * x >= 0 and self.y * y >= 0:
self.x = x
self.y = y

def get_head(self):
# 獲取蛇頭座標
return self.item[0]

def draw(self, screen):
# 畫出貪吃蛇
# 蛇頭爲半徑爲 15 的綠實心圓
radius = 15
width = 15
# i:1---34 j:1---25
color = 0, 255, 0
# position 爲圖形的座標
position = 10 + 20 * self.item[0][0], 10 + 20 * self.item[0][1]
pygame.draw.circle(screen, color, position, radius, width)
# 蛇身爲半徑爲 10 的黃色實心圓
radius = 10
width = 10
color = 255, 255, 0
for i, j in self.item[1:]:
position = 10 + 20 * i, 10 + 20 * j
pygame.draw.circle(screen, color, position, radius, width)

# 初始界面
def init_board(screen):
board_width = BOARDWIDTH
board_height = BOARDHEIGHT
color = 10, 255, 255
width = 0
# width:x, height:y
# 左右邊框佔用了 X: 0 35*20
for i in range(board_width):
pos = i * 20, 0, 20, 20
pygame.draw.rect(screen, color, pos, width)
'''
pos = i * 20, (board_height - 1) * 20, 20, 20
pygame.draw.rect(screen, color, pos, width)
# 上下邊框佔用了 Y: 0 26*20
for i in range(board_height - 1):
pos = 0, 20 + i * 20, 20, 20
pygame.draw.rect(screen, color, pos, width)
pos = (board_width - 1) * 20, 20 + i * 20, 20, 20
pygame.draw.rect(screen, color, pos, width)
'''

# 遊戲失敗
def game_over(snake):
broad_x, broad_y = snake.get_head()
flag = 0
old = len(snake.item)
new = len(set(snake.item))
# 遊戲失敗的兩種可能
# 咬到自身
if new < old:
flag = 1
# 撞到邊框
if broad_x == 0 or broad_x == BOARDWIDTH - 1:
flag = 1
if broad_y == 0 or broad_y == BOARDHEIGHT - 1:
flag = 1

if flag:
return True
else:
return False

# 打印字符
def print_text(screen, font, x, y, text, color=(255, 0, 0)):
# 在屏幕上打印字符
# text是須要打印的文本，color爲字體顏色
# (x,y)是文本在屏幕上的位置
imgText = font.render(text, True, color)
screen.blit(imgText, (x, y))

# 按鍵
def press(keys, snake):
global score
# K_w 爲 pygame.locals 中的常量
# keys[K_w] 返回 True or False
# 上移
if keys[K_w] or keys[K_UP]:
snake.toward(0, -1)
# 下移
elif keys[K_s] or keys[K_DOWN]:
snake.toward(0, 1)
# 左移
elif keys[K_a] or keys[K_LEFT]:
snake.toward(-1, 0)
# 右移
elif keys[K_d] or keys[K_RIGHT]:
snake.toward(1, 0)
# 重置遊戲
elif keys[K_r]:
score = 0
main()
# 退出遊戲
elif keys[K_ESCAPE]:
pygame.quit()
exit(0)

# 遊戲初始化
def game_init():
# pygame 初始化
pygame.init()
# 設置遊戲界面大小
screen = pygame.display.set_mode((BOARDWIDTH * 20, BOARDHEIGHT * 20))
# 設置遊戲標題
pygame.display.set_caption('貪吃蛇')
# sound = pygame.mixer.Sound(AUDIONAME)
# channel = pygame.mixer.find_channel(True)
# channel.play(sound)
return screen

# 開始遊戲
def game(screen):
snake = Snake()
food = Food()
# 設置中文字體和大小
font = pygame.font.SysFont('SimHei', 20)
is_fail = 0
while True:
for event in pygame.event.get():
if event.type == QUIT:
pygame.quit()
exit(0)
# 填充屏幕
screen.fill((0, 0, 100))
init_board(screen=screen)
# 得到用戶按鍵命令
keys = pygame.key.get_pressed()
press(keys, snake)
# 遊戲失敗打印提示
if is_fail:
font2 = pygame.font.Font(None, 80)
print_text(screen, font2, 400, 200, "You Lose")
# 遊戲主進程
if not is_fail:
enlarge = snake.eat_food(food)
text = u"分數: {}".format(score)
print_text(screen, font, 860, 0, text)
food.update(screen, enlarge, snake)
snake.move(enlarge)
is_fail = game_over(snake=snake)
snake.draw(screen)
# 遊戲刷新
pygame.display.update()
time.sleep(0.1)

# 主程序
def main():
screen = game_init()
game(screen)

if __name__ == '__main__':
main()

五、反思：

對Python還需增強練習，不夠熟練。