-
Notifications
You must be signed in to change notification settings - Fork 0
/
snake2.py
174 lines (156 loc) · 5.91 KB
/
snake2.py
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
import pygame as pg
from random import randint
import sys
from pygame.locals import *
FPS = 15 # 画面帧数,代表蛇的移动速率
window_width = 600
window_height = 500
cellsize = 20
cell_width = int(window_width / cellsize)
cell_height = int(window_height / cellsize)
BGcolor = (0, 0, 0)
BLUE = (0, 0, 255)
RED = (255, 0, 0)
apple_color = (255, 0, 0)
snake_color = (0, 150, 0)
GREEN = (0, 255, 0)
WHITE = (255, 255, 255)
DARKGRAY = (40, 40, 40)
UP = "up"
DOWN = "down"
LEFT = "left"
RIGHT = "right"
HEAD = 0
def main(): # 有函数
global FPSclock, window, BASICFONT
pg.init()
FPSclock = pg.time.Clock()
window = pg.display.set_mode((window_width, window_height))
BASICFONT = pg.font.Font("freesansbold.ttf", 18)
pg.display.set_caption("贪吃蛇")
showStartScreen()
while True:
runGame()
showGameOverScreen()
def runGame(): # 运行游戏函数
startx = randint(5, cell_width - 6)
starty = randint(5, cell_height - 6)
snakeCoords = [{"x": startx, "y": starty}, {"x": startx - 1, "y": starty}, {"x": startx - 2, "y": starty}]
direction = RIGHT
apple = getRandomLocation()
while True:
for event in pg.event.get():
if event.type == QUIT:
terminate()
elif event.type == KEYDOWN:
if event.key == K_LEFT and direction != RIGHT:
direction = LEFT
elif event.key == K_RIGHT and direction != LEFT:
direction = RIGHT
elif event.key == K_UP and direction != DOWN:
direction = UP
elif event.key == K_DOWN and direction != UP:
direction = DOWN
elif event.key == K_ESCAPE:
terminate()
if snakeCoords[HEAD]["x"] == -1 or snakeCoords[HEAD]["x"] == cell_width or snakeCoords[HEAD]["y"] == -1 or \
snakeCoords[HEAD]["y"] == cell_height:
return
for snakeBody in snakeCoords[1:]:
if snakeBody["x"] == snakeCoords[HEAD]["x"] and snakeBody["y"] == snakeCoords[HEAD]["y"]:
return
if snakeCoords[HEAD]["x"] == apple["x"] and snakeCoords[HEAD]["y"] == apple["y"]:
apple = getRandomLocation()
else:
del snakeCoords[-1]
if direction == UP:
newHead = {"x": snakeCoords[HEAD]["x"], "y": snakeCoords[HEAD]["y"] - 1}
elif direction == DOWN:
newHead = {"x": snakeCoords[HEAD]["x"], "y": snakeCoords[HEAD]["y"] + 1}
elif direction == LEFT:
newHead = {"x": snakeCoords[HEAD]["x"] - 1, "y": snakeCoords[HEAD]["y"]}
elif direction == RIGHT:
newHead = {"x": snakeCoords[HEAD]["x"] + 1, "y": snakeCoords[HEAD]["y"]}
snakeCoords.insert(0, newHead)
window.fill(BGcolor)
drawGrid()
drawSnake(snakeCoords)
drawApple(apple)
drawScore(len(snakeCoords) - 3)
pg.display.update()
FPSclock.tick(FPS)
def drawPressKeyMsg(): # 游戏开始提示信息
pressKeySurf = BASICFONT.render("press a key to play", True, BLUE)
pressKeyRect = pressKeySurf.get_rect()
pressKeyRect.topleft = (window_width - 200, window_height - 30)
window.blit(pressKeySurf, pressKeyRect)
def checkForKeyPress(): # 检查是否触发按键
if len(pg.event.get(QUIT)) > 0:
terminate()
keyUpEvents = pg.event.get(KEYUP)
if len(keyUpEvents) == 0:
return None
if keyUpEvents[0].key == K_ESCAPE:
terminate()
return keyUpEvents[0].key
def showStartScreen(): # 开始画面
window.fill(BGcolor)
titleFont = pg.font.Font("freesansbold.ttf", 100)
titleSurf = titleFont.render("snake!", True, RED)
titleRect = titleSurf.get_rect()
titleRect.center = (window_width / 2, window_height / 2)
window.blit(titleSurf, titleRect)
drawPressKeyMsg()
pg.display.update()
while True:
if checkForKeyPress():
pg.event.get()
return
def terminate(): # 退出
pg.quit()
sys.exit()
def getRandomLocation(): # 出现位置
return {"x": randint(0, cell_width - 1), "y": randint(0, cell_height - 1)}
def showGameOverScreen(): # 游戏结束
gameOverFont = pg.font.Font("freesansbold.tff", 150)
gameSurf = gameOverFont.render("Game", True, WHITE)
overSurf = gameOverFont.render("over", True, WHITE)
gameRect = gameSurf.get_rect()
overRect = overSurf.get_rect()
gameRect.midtop = (window_width / 2, 10)
overRect.midtop = (window_width / 2, gameRect.height10 + 25)
window.blit(gameSurf, gameRect)
window.blit(overSurf, overRect)
drawPressKeyMsg()
pg.display.update()
pg.time.wait(500)
checkForKeyPress()
while True:
if checkForKeyPress():
pg.event.get()
return
def drawScore(score): # 显示分数
scoreSurf = BASICFONT.render("Score:%s" % (score), True, WHITE)
scoreRect = scoreSurf.get_rect()
scoreRect.topleft = (window_width - 120, 10)
window.blit(scoreSurf, scoreRect)
def drawSnake(snakeCoords): # 画蛇
for coord in snakeCoords:
x = coord["x"] * cellsize
y = coord["y"] * cellsize
snakeSegmentRect = pg.Rect(x, y, cellsize, cellsize)
pg.draw.rect(window, snake_color, snakeSegmentRect)
snakeInnerSegmentRect = pg.Rect(x + 4, y + 4, cellsize - 8, cellsize - 8)
pg.draw.rect(window, GREEN, snakeInnerSegmentRect)
def drawApple(coord):
x = coord["x"] * cellsize
y = coord["y"] * cellsize
appleRect = pg.Rect(x, y, cellsize, cellsize)
pg.draw.rect(window, apple_color, appleRect)
def drawGrid(): # 画方格
for x in range(0, window_width, cellsize):
pg.draw.line(window, DARKGRAY, (x, 0), (x, window_height))
for y in range(0, window_height, cellsize):
pg.draw.line(window, DARKGRAY, (0, y), (window_width, y))
if __name__ == "__main__":
main()