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150行python代码实现贪吃蛇游戏

2020-05-04 07:10 1331 查看

上篇博文我们实现了两百行代码实现贪吃蛇游戏，这次我们来实现一个代码量更加少，功能却更加完整的

python代码实现贪吃蛇游戏，具体代码与文件可以访问我的GitHub地址获取

游戏截图

动图

贪吃蛇python代码

"""贪吃蛇"""

import random
import sys
import time
import pygame
from pygame.locals import *
from collections import deque

SCREEN_WIDTH = 600  # 屏幕宽度
SCREEN_HEIGHT = 480  # 屏幕高度
SIZE = 20    # 小方格大小
LINE_WIDTH = 1   # 网格线宽度

# 游戏区域的坐标范围
SCOPE_X = (0, SCREEN_WIDTH // SIZE - 1)
SCOPE_Y = (2, SCREEN_HEIGHT // SIZE - 1)

# 食物的分值及颜色
FOOD_STYLE_LIST = [(10, (255, 100, 100)), (20, (100, 255, 100)), (30, (100, 100, 255))]

LIGHT = (100, 100, 100)
DARK = (200, 200, 200)  # 蛇的颜色
BLACK = (0, 0, 0)   # 网格线颜色
RED = (200, 30, 30)   # 红色，GAME OVER 的字体颜色
BGCOLOR = (40, 40, 60)  # 背景色

def print_text(screen, font, x, y, text, fcolor=(255, 255, 255)):
imgText = font.render(text, True, fcolor)
screen.blit(imgText, (x, y))

# 初始化蛇
def init_snake():
snake = deque()
snake.append((2, SCOPE_Y[0]))
snake.append((1, SCOPE_Y[0]))
snake.append((0, SCOPE_Y[0]))
return snake

def create_food(snake):
food_x = random.randint(SCOPE_X[0], SCOPE_X[1])
food_y = random.randint(SCOPE_Y[0], SCOPE_Y[1])
while (food_x, food_y) in snake:
# 如果食物出现在蛇身上，则重来
food_x = random.randint(SCOPE_X[0], SCOPE_X[1])
food_y = random.randint(SCOPE_Y[0], SCOPE_Y[1])
return food_x, food_y

def get_food_style():
return FOOD_STYLE_LIST[random.randint(0, 2)]

def main():
pygame.init()
screen = pygame.display.set_mode((SCREEN_WIDTH, SCREEN_HEIGHT))
pygame.display.set_caption('贪吃蛇')

font1 = pygame.font.SysFont('SimHei', 24) # 得分的字体
font2 = pygame.font.Font(None, 72) # GAME OVER 的字体
fwidth, fheight = font2.size('GAME OVER')

# 如果蛇正在向右移动，那么快速点击向下向左，由于程序刷新没那么快，向下事件会被向左覆盖掉，导致蛇后退，直接GAME OVER
# b 变量就是用于防止这种情况的发生
b = True

# 蛇
snake = init_snake()
# 食物
food = create_food(snake)
food_style = get_food_style()
# 方向
pos = (1, 0)

game_over = True
start = False  # 是否开始，当start = True，game_over = True 时，才显示 GAME OVER
score = 0   # 得分
orispeed = 0.5  # 原始速度
speed = orispeed
last_move_time = None
pause = False  # 暂停

while True:
for event in pygame.event.get():
if event.type == QUIT:
sys.exit()
elif event.type == KEYDOWN:
if event.key == K_RETURN:
if game_over:
start = True
game_over = False
b = True
snake = init_snake()
food = create_food(snake)
food_style = get_food_style()
pos = (1, 0)
# 得分
score = 0
last_move_time = time.time()
elif event.key == K_SPACE:
if not game_over:
pause = not pause
elif event.key in (K_w, K_UP):
# 这个判断是为了防止蛇向上移时按了向下键，导致直接 GAME OVER
if b and not pos[1]:
pos = (0, -1)
b = False
elif event.key in (K_s, K_DOWN):
if b and not pos[1]:
pos = (0, 1)
b = False
elif event.key in (K_a, K_LEFT):
if b and not pos[0]:
pos = (-1, 0)
b = False
elif event.key in (K_d, K_RIGHT):
if b and not pos[0]:
pos = (1, 0)
b = False

# 填充背景色
screen.fill(BGCOLOR)
# 画网格线 竖线
for x in range(SIZE, SCREEN_WIDTH, SIZE):
pygame.draw.line(screen, BLACK, (x, SCOPE_Y[0] * SIZE), (x, SCREEN_HEIGHT), LINE_WIDTH)
# 画网格线 横线
for y in range(SCOPE_Y[0] * SIZE, SCREEN_HEIGHT, SIZE):
pygame.draw.line(screen, BLACK, (0, y), (SCREEN_WIDTH, y), LINE_WIDTH)

if not game_over:
curTime = time.time()
if curTime - last_move_time > speed:
if not pause:
b = True
last_move_time = curTime
next_s = (snake[0][0] + pos[0], snake[0][1] + pos[1])
if next_s == food:
# 吃到了食物
snake.appendleft(next_s)
score += food_style[0]
speed = orispeed - 0.03 * (score // 100)
food = create_food(snake)
food_style = get_food_style()
else:
if SCOPE_X[0] <= next_s[0] <= SCOPE_X[1] and SCOPE_Y[0] <= next_s[1] <= SCOPE_Y[1] \
and next_s not in snake:
snake.appendleft(next_s)
snake.pop()
else:
game_over = True

# 画食物
if not game_over:
# 避免 GAME OVER 的时候把 GAME OVER 的字给遮住了
pygame.draw.rect(screen, food_style[1], (food[0] * SIZE, food[1] * SIZE, SIZE, SIZE), 0)

# 画蛇
for s in snake:
pygame.draw.rect(screen, DARK, (s[0] * SIZE + LINE_WIDTH, s[1] * SIZE + LINE_WIDTH,
SIZE - LINE_WIDTH * 2, SIZE - LINE_WIDTH * 2), 0)

print_text(screen, font1, 30, 7, f'速度: {score//100}')
print_text(screen, font1, 450, 7, f'得分: {score}')

if game_over:
if start:
print_text(screen, font2, (SCREEN_WIDTH - fwidth) // 2, (SCREEN_HEIGHT - fheight) // 2, 'GAME OVER', RED)

pygame.display.update()

if __name__ == '__main__':
main()

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