Come and play Snake? python? This is an interesting story!
import pygame
import sys
import random
# global definition
SCREEN_X = 600
SCREEN_Y = 600
# Points are in units of 25
class Snake(object):
# Initialize various required properties [default right/body block x5 at the beginning]
def __init__(self):
self.dirction = pygame.K_RIGHT
self.body = []
for x in range(5):
self.addnode()
# Add snake blocks to the front end whenever
def addnode(self):
left, top = (0, 0)
if self.body:
left, top = (self.body[0].left, self.body[0].top)
node = pygame.Rect(left, top, 25, 25)
if self.dirction == pygame.K_LEFT:
node.left -= 25
elif self.dirction == pygame.K_RIGHT:
node.left += 25
elif self.dirction == pygame.K_UP:
node.top -= 25
elif self.dirction == pygame.K_DOWN:
node.top += 25
self.body.insert(0, node)
# delete the last block
def delnode(self):
self.body.pop()
# death judgment
def isdead(self):
# hit the wall
if self.body[0].x not in range(SCREEN_X):
return True
if self.body[0].y not in range(SCREEN_Y):
return True
# bump yourself
if self.body[0] in self.body[1:]:
return True
return False
# 移动！
def move(self):
self.addnode()
self.delnode()
# 改变方向 但是左右、上下不能被逆向改变
def changedirection(self, curkey):
LR = [pygame.K_LEFT, pygame.K_RIGHT]
UD = [pygame.K_UP, pygame.K_DOWN]
if curkey in LR+UD:
if (curkey in LR) and (self.dirction in LR):
return
if (curkey in UD) and (self.dirction in UD):
return
self.dirction = curkey
# 食物类
# 方法： 放置/移除
# 点以25为单位
class Food:
def __init__(self):
self.rect = pygame.Rect(-25, 0, 25, 25)
def remove(self):
self.rect.x = -25
def set(self):
if self.rect.x == -25:
allpos = []
# 不靠墙太近 25 ~ SCREEN_X-25 之间
for pos in range(25, SCREEN_X-25, 25):
allpos.append(pos)
self.rect.left = random.choice(allpos)
self.rect.top = random.choice(allpos)
def show_text(screen, pos, text, color, font_bold=False, font_size=60, font_italic=False):
# 获取系统字体，并设置文字大小
cur_font = pygame.font.SysFont("宋体", font_size)
# 设置是否加粗属性
cur_font.set_bold(font_bold)
# 设置是否斜体属性
cur_font.set_italic(font_italic)
# 设置文字内容
text_fmt = cur_font.render(text, 1, color)
# 绘制文字
screen.blit(text_fmt, pos)
def main():
pygame.init()
screen_size = (SCREEN_X, SCREEN_Y)
screen = pygame.display.set_mode(screen_size)
pygame.display.set_caption('Snake')
clock = pygame.time.Clock()
scores = 0
isdead = False
# 蛇/食物
snake = Snake()
food = Food()
while True:
for event in pygame.event.get():
if event.type == pygame.QUIT:
sys.exit()
if event.type == pygame.KEYDOWN:
snake.changedirection(event.key)
# 死后按space重新
if event.key == pygame.K_SPACE and isdead:
return main()
screen.fill((255, 255, 255))
# 画蛇身 / 每一步+1分
if not isdead:
scores += 1
snake.move()
for rect in snake.body:
pygame.draw.rect(screen, (20, 220, 39), rect, 0)
# 显示死亡文字
isdead = snake.isdead()
if isdead:
show_text(screen, (100, 200), 'YOU DEAD!',
(227, 29, 18), False, 100)
show_text(screen, (150, 260),
'press space to try again...', (0, 0, 22), False, 30)
# Food Handling/ Eat +50 points
# When the food rect coincides with the snake head, eat it -> Snake adds a Node
if food.rect == snake.body[0]:
scores += 50
food.remove()
snake.addnode()
# food delivery
food.set()
pygame.draw.rect(screen, (136, 0, 21), food.rect, 0)
# display fraction text
show_text(screen, (50, 500), 'Scores: '+str(scores), (223, 223, 223))
pygame.display.update()
clock.tick(10)
if __name__ == '__main__':
main()