python 贪吃蛇

我们的文件结构：

---snake
	--run.py

run.py:

#我们先引入pygame、sys、random
import pygame as pg
import sys
import random as rd
from pygame import *

pg.init()

SC_W = 600
SC_H = 600
SC = pg.display.set_mode((SC_W, SC_H))
Timer = pg.time.Clock()
START = True
FPS = 5
SnakeDirection = 'R'

pg.display.set_caption("贪吃蛇(Snake)")

snakeBodyWidth = 20
snakeBodyHeight = 20
snakeBodyColor = (255, 255, 0)
radomStartX = rd.randint(6, 20)
radomStartY = rd.randint(6, 20)
bodyMagin = 5
snakeInnerBodyColor = (255, 255, 255)
snakeStartPos = [
    [radomStartX*snakeBodyWidth, radomStartX*snakeBodyHeight],
    [(radomStartX-1)*snakeBodyWidth, radomStartX*snakeBodyHeight],
    [(radomStartX-2)*snakeBodyWidth, radomStartX*snakeBodyHeight]
]
foodWidth = 20
foodHeight = 20

footStartX = rd.randint(0, 29)
footStartY = rd.randint(0, 29)
footStartPos = [
    [footStartX*foodWidth, footStartY*foodHeight],
    [rd.randint(0, 29)*foodWidth, rd.randint(0, 29)*foodHeight]
]

Score = 0
font = pygame.font.SysFont("arial", 16)


while START:
    foodColor = (rd.randint(0, 255), rd.randint(0, 255), rd.randint(0, 255))
    for event in pg.event.get():
        if event.type == pg.QUIT:
            START = False
            break
        elif event.type == KEYDOWN:
            if event.key == K_a or event.key == K_LEFT:
                if SnakeDirection != 'R':
                    SnakeDirection = 'L'
            elif event.key == K_d or event.key == K_RIGHT:
                if SnakeDirection != 'L':
                    SnakeDirection = 'R'
            elif event.key == K_w or event.key == K_UP:
                if SnakeDirection != 'D':
                    SnakeDirection = 'U'
            elif event.key == K_s or event.key == K_DOWN:
                if SnakeDirection != 'U':
                    SnakeDirection = 'D'
    SC.fill((255, 250, 240))
    userScore = font.render(str(Score), True, (255, 0, 0))
    SC.blit(userScore, (0, 0))

    if snakeStartPos[0][0] < 0 or snakeStartPos[0][0] >= 600 or snakeStartPos[0][1] < 0 or snakeStartPos[0][1] >= 600:
        pg.display.set_caption("Game over")
        userScore = font.render("Game Over", True, (255, 0, 0))
        SC.fill((255, 250, 240))
        SC.blit(userScore, (200, 250))
        footStartPos.pop(0)
        footStartPos.pop(-1)
        pg.display.update()
        Timer.tick(FPS+5)
#    for foodPos in footStartPos:
#        for snakePos in snakeStartPos:
#            if snakePos == foodPos:
#                footStartPos = [rd.randint(
#                    0, 29)*foodWidth, rd.randint(0, 29)*foodHeight], [rd.randint(
#                        0, 29)*foodWidth, rd.randint(0, 29)*foodHeight]
#                Score += 1
#                snakeStartPos.append([-20, -20])
    if footStartPos[0] in snakeStartPos:
        footStartPos[0] = [rd.randint(
            0, 29)*foodWidth, rd.randint(0, 29)*foodHeight]
        Score += 1
        snakeStartPos.append([-20, -20])
    elif footStartPos[1] in snakeStartPos:
        footStartPos[1] = [(rd.randint(0, 29)-1)*foodWidth,
                           (rd.randint(0, 29))*foodHeight]
        Score += 1
        snakeStartPos.append([-20, -20])
    foodRect = pg.Rect(footStartPos[0][0],
                       footStartPos[0][1], foodWidth, foodHeight)
    foodDrawRect = pg.draw.rect(SC, foodColor, foodRect)
    foodRect = pg.Rect(footStartPos[1][0],
                       footStartPos[1][1], foodWidth, foodHeight)
    foodDrawRect = pg.draw.rect(SC, foodColor, foodRect)

    for snackPos in snakeStartPos:
        snakeRect = pg.Rect(snackPos[0], snackPos[1],
                            snakeBodyWidth, snakeBodyHeight)
        snakeDrawRect = pg.draw.rect(SC, snakeBodyColor, snakeRect)
        snackInnerRect = pg.Rect(
            snackPos[0]+4, snackPos[1]+4, snakeBodyWidth-8, snakeBodyHeight-8)
        snakeInnerDraw = pg.draw.rect(SC, snakeInnerBodyColor, snackInnerRect)

    if SnakeDirection == 'R':
        NEWHEAD = [snakeStartPos[0][0]+20, snakeStartPos[0][1]]
    elif SnakeDirection == 'L':
        NEWHEAD = [snakeStartPos[0][0]-20, snakeStartPos[0][1]]
    elif SnakeDirection == 'U':
        NEWHEAD = [snakeStartPos[0][0], snakeStartPos[0][1]-20]
    elif SnakeDirection == 'D':
        NEWHEAD = [snakeStartPos[0][0], snakeStartPos[0][1]+20]
    snakeStartPos.insert(0, NEWHEAD)
    snakeStartPos.pop(-1)
    pg.display.update()
    Timer.tick(FPS)