利用Pygame写一个贪吃蛇小游戏

这是之前学校Python实训的时候写的,虽说有些瑕疵,但是比较有纪念意义。
学了又忘,忘了又学。
附上几张效果图:
游戏开始界面
颜色、文字、图形都可以自行更改:
利用Pygame写一个贪吃蛇小游戏_第1张图片
游戏进行界面
你可以进行果实颜色、贪吃蛇颜色和速度和相关游戏设置的更改,不要太快,我也是试了之后才发现我自己这么手残… …
利用Pygame写一个贪吃蛇小游戏_第2张图片
这里得分是吃一次果实一分,其实就是非常简单的在一个pygame创造的窗口中,对随机出现的一个二维数组进行遍历循环… …
游戏结束界面
当时中国新说唱还在热播,我看了几期直接被节目里满嘴的“bro”给洗脑了,现在想来竟然如此辣眼… …
利用Pygame写一个贪吃蛇小游戏_第3张图片
下面贴上代码:

# -python3.7.0-
# -*- coding:utf-8 -*-
# !/usr/bin/env python 
# @Time    : 2019/07/04 19:14
# @Author  : Chekhov
# @File    : tantanshe.pyi

import random
import pygame
import sys
from pygame.locals import *

FPS = 15    # F: frame / P:per / S: second

WINDOWWIDTH = 640
WINDOWHEIGHT = 480
CELLSIZE = 20
assert WINDOWWIDTH % CELLSIZE == 0, "宽度应是栅格倍数"
assert WINDOWHEIGHT % CELLSIZE == 0, "高度应是栅格倍数"
CELLWIDTH = int(WINDOWWIDTH / CELLSIZE)
CELLHEIGHT = int(WINDOWHEIGHT / CELLSIZE)

#             R    G    B           R: red / G: green / B: blue
WHITE     = (255, 255, 255)
BLACK     = (  0,   0,   0)
RED       = (255,   0,   0)
GREEN     = (  0, 255,   0)
DARKGREEN = (  0, 155,   0)
DARKGRAY  = ( 40,  40,  40)
BGCOLOR = BLACK     # BG: background

UP = 'up'
DOWN = 'down'
LEFT = 'left'
RIGHT = 'right'

HEAD = 0    # syntactic sugar: index of the worm's head

def main():
    global FPSCLOCK, DISPLAYSURF, BASICFONT

    pygame.init()
    FPSCLOCK = pygame.time.Clock()
    DISPLAYSURF = pygame.display.set_mode((WINDOWWIDTH, WINDOWHEIGHT))
    BASICFONT = pygame.font.SysFont('SimHei.ttf', 18)
    pygame.display.set_caption('贪贪蛇')

    showStartScreen()
    while True:
        runGame()
        showGameOverScreen()


def runGame():
    # Set a random start point.
    startx = random.randint(5, CELLWIDTH - 6)
    starty = random.randint(5, CELLHEIGHT - 6)
    wormCoords = [{'x': startx,     'y': starty},
                  {'x': startx - 1, 'y': starty},
                  {'x': startx - 2, 'y': starty}]
    direction = RIGHT

    # Start the apple in a random place.
    apple = getRandomLocation()

    while True:    # main game loop
        for event in pygame.event.get():    # event handling loop
            if event.type == QUIT:
                terminate()
            elif event.type == KEYDOWN:
                if (event.key == K_LEFT or event.key == K_a) and direction != RIGHT:
                    direction = LEFT
                elif (event.key == K_RIGHT or event.key == K_d) and direction != LEFT:
                    direction = RIGHT
                elif (event.key == K_UP or event.key == K_w) and direction != DOWN:
                    direction = UP
                elif (event.key == K_DOWN or event.key == K_s) and direction != UP:
                    direction = DOWN
                elif event.key == K_ESCAPE:
                    terminate()

        # check if the wormy has hit itself or the edge
        if wormCoords[HEAD]['x'] == -1 or \
                wormCoords[HEAD]['x'] == CELLWIDTH or \
                wormCoords[HEAD]['y'] == -1 or \
                wormCoords[HEAD]['y'] == CELLHEIGHT:
            return  # game over
        for wormBody in wormCoords[1:]:
            if wormBody['x'] == wormCoords[HEAD]['x'] and wormBody['y'] == wormCoords[HEAD]['y']:
                return  # game over

        # check if worm has eaten an apply
        if wormCoords[HEAD]['x'] == apple['x'] and wormCoords[HEAD]['y'] == apple['y']:
            # don't remove worm's tail segment
            apple = getRandomLocation() # set a new apple somewhere
        else:
            del wormCoords[-1] # remove worm's tail segment

        # move the worm by adding a segment in the direction it is moving
        if direction == UP:
            newHead = {'x': wormCoords[HEAD]['x'], 'y': wormCoords[HEAD]['y'] - 1}
        elif direction == DOWN:
            newHead = {'x': wormCoords[HEAD]['x'], 'y': wormCoords[HEAD]['y'] + 1}
        elif direction == LEFT:
            newHead = {'x': wormCoords[HEAD]['x'] - 1, 'y': wormCoords[HEAD]['y']}
        elif direction == RIGHT:
            newHead = {'x': wormCoords[HEAD]['x'] + 1, 'y': wormCoords[HEAD]['y']}
        wormCoords.insert(0, newHead)
        DISPLAYSURF.fill(BGCOLOR)
        drawGrid()
        drawWorm(wormCoords)
        drawApple(apple)
        drawScore(len(wormCoords) - 3)
        pygame.display.update()
        FPSCLOCK.tick(FPS)


def drawPressKeyMsg():
    keyFont = pygame.font.SysFont('SimHei', 25)
    pressKeySurf = keyFont.render(u'按任意键进入游戏....', True, DARKGREEN)
    pressKeyRect = pressKeySurf.get_rect()
    pressKeyRect.topleft = (WINDOWWIDTH - 200, WINDOWHEIGHT - 30)
    DISPLAYSURF.blit(pressKeySurf, pressKeyRect)


def checkForKeyPress():
    if len(pygame.event.get(QUIT)) > 0:
        terminate()

    keyUpEvents = pygame.event.get(KEYUP)
    if len(keyUpEvents) == 0:
        return None
    if keyUpEvents[0].key == K_ESCAPE:
        terminate()
    return keyUpEvents[0].key


def showStartScreen():
    titleFont = pygame.font.SysFont('SimHei', 100)
    titleSurf1 = titleFont.render(u'贪贪蛇', True, WHITE, DARKGRAY)
    titleSurf2 = titleFont.render(u'Snake', True, RED)

    degrees1 = 0
    degrees2 = 0
    while True:
        DISPLAYSURF.fill(BGCOLOR)
        rotatedSurf1 = pygame.transform.rotate(titleSurf1, degrees1)
        rotatedRect1 = rotatedSurf1.get_rect()
        rotatedRect1.center = (WINDOWWIDTH / 2, WINDOWHEIGHT / 2)
        DISPLAYSURF.blit(rotatedSurf1, rotatedRect1)

        rotatedSurf2 = pygame.transform.rotate(titleSurf2, degrees2)
        rotatedRect2 = rotatedSurf2.get_rect()
        rotatedRect2.center = (WINDOWWIDTH / 2, WINDOWHEIGHT / 2)
        DISPLAYSURF.blit(rotatedSurf2, rotatedRect2)

        drawPressKeyMsg()

        if checkForKeyPress():
            pygame.event.get()  # clear event queue
            return
        pygame.display.update()
        FPSCLOCK.tick(FPS)
        degrees1 += 1   # rotate by 3 degrees each frame
        degrees2 += 3   # rotate by 7 degrees each frame


def terminate():
    pygame.quit()
    sys.exit()


def getRandomLocation():
    return {'x': random.randint(0, CELLWIDTH - 1), 'y': random.randint(0, CELLHEIGHT - 1)}


def showGameOverScreen():
    gameOverFont = pygame.font.SysFont('SimHei', 150)
    gameSurf = gameOverFont.render(u'Bro!', True, WHITE)
    overSurf = gameOverFont.render(u'你死了!', True, WHITE)
    gameRect = gameSurf.get_rect()
    overRect = overSurf.get_rect()
    gameRect.midtop = (WINDOWWIDTH / 2, 10)
    overRect.midtop = (WINDOWWIDTH / 2, gameRect.height + 10 + 25)

    DISPLAYSURF.blit(gameSurf, gameRect)
    DISPLAYSURF.blit(overSurf, overRect)
    drawPressKeyMsg()
    pygame.display.update()
    pygame.time.wait(500)
    checkForKeyPress() # clear out any key presses in the event queue

    while True:
        if checkForKeyPress():
            pygame.event.get() # clear event queue
            return


def drawScore(score):
    scoreFont = pygame.font.SysFont('SimHei', 30)
    scoreSurf = scoreFont.render(u"得分: %s" % (score), True, WHITE)
    scoreRect = scoreSurf.get_rect()
    scoreRect.topleft = (WINDOWWIDTH - 150, 10)
    DISPLAYSURF.blit(scoreSurf, scoreRect)


def drawWorm(wormCoords):
    for coord in wormCoords:
        x = coord['x'] * CELLSIZE
        y = coord['y'] * CELLSIZE
        wormSegmentRect = pygame.Rect(x, y, CELLSIZE, CELLSIZE)
        pygame.draw.rect(DISPLAYSURF, DARKGREEN, wormSegmentRect)
        wormInnerSegmentRect = pygame.Rect(x + 4, y + 4, CELLSIZE - 8, CELLSIZE - 8)
        pygame.draw.rect(DISPLAYSURF, GREEN, wormInnerSegmentRect)


def drawApple(coord):
    x = coord['x'] * CELLSIZE
    y = coord['y'] * CELLSIZE
    appleRect = pygame.Rect(x, y, CELLSIZE, CELLSIZE)
    pygame.draw.rect(DISPLAYSURF, RED, appleRect)


def drawGrid():
    for x in range(0, WINDOWWIDTH, CELLSIZE):   # draw vertical lines
        pygame.draw.line(DISPLAYSURF, DARKGRAY, (x, 0), (x, WINDOWHEIGHT))
    for y in range(0, WINDOWHEIGHT, CELLSIZE):  # draw horizontal lines
        pygame.draw.line(DISPLAYSURF, DARKGRAY, (0, y), (WINDOWWIDTH, y))


if __name__ == '__main__':
    main()

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