期中作业

homework

import random, pygame, sys
from pygame.locals import *
FPS = 15
WINDOWWIDTH = 640
WINDOWHEIGHT = 480
CELLSIZE = 20
assert WINDOWWIDTH % CELLSIZE == 0, "Window width must be a multiple of     cell size."
assert WINDOWHEIGHT % CELLSIZE == 0, "Window height must be a multiple of cell size."
CELLWIDTH = int(WINDOWWIDTH / CELLSIZE)
CELLHEIGHT = int(WINDOWHEIGHT / CELLSIZE)

WHITE     = (255, 255, 255)
BLACK     = (  0,   0,   0)
RED       = (200,   0,   0)
YELLOW    = (255, 255,   0)
DARKGREEN = (  0, 155,   0)
DARKGRAY  = ( 40,  40,  40)
SLIVER    = (192, 192, 192)
GREEN     = (  0, 255,   0)
BLUE      = (  0, 128, 128)
BGCOLOR = SLIVER

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.Font('freesansbold.ttf', 18)
pygame.display.set_caption('Snake')

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


def runGame():
# Set a random start point.
startx = random.randint(5, CELLWIDTH - 15)
starty = random.randint(5, CELLHEIGHT - 6)
wormCoords = [{'x': startx,     'y': starty},
              {'x': startx - 1, 'y': starty},
              {'x': startx - 2, 'y': starty}]
direction = RIGHT
apple = getRandomLocation()

while True: # main game loop
    for event in pygame.event.get(): 
        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 worm 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():
pressKeySurf = BASICFONT.render('Press a key to play.', True, DARKGRAY)
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.Font('freesansbold.ttf', 100)
titleSurf1 = titleFont.render('Scoff', True, WHITE, DARKGREEN)
titleSurf2 = titleFont.render('Snake', True, YELLOW)

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() 
        return
    pygame.display.update()
    FPSCLOCK.tick(FPS)
    degrees1 += 3 
    degrees2 += 7 


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.Font('freesansbold.ttf', 150)
gameSurf = gameOverFont.render('Game', True, BLUE)
overSurf = gameOverFont.render('Over', 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() 

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

def drawScore(score):
scoreSurf = BASICFONT.render('Score: %s' % (score), True, WHITE)
scoreRect = scoreSurf.get_rect()
scoreRect.topleft = (WINDOWWIDTH - 120, 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()