squirrel_eat_squirrel.zip_Pygame_eat_pygame小游戏_python游戏编程_基于pyth

# Squirrel Eat Squirrel (a 2D Katamari Damacy clone) # By Al Sweigart al@inventwithpython.com # http://inventwithpython.com/pygame # Released under a "Simplified BSD" license import random, sys, time, math, pygame from pygame.locals import * FPS = 30 # frames per second to update the screen WINWIDTH = 640 # width of the program's window, in pixels WINHEIGHT = 480 # height in pixels HALF_WINWIDTH = int(WINWIDTH / 2) HALF_WINHEIGHT = int(WINHEIGHT / 2) GRASSCOLOR = (24, 255, 0) WHITE = (255, 255, 255) RED = (255, 0, 0) CAMERASLACK = 90 # how far from the center the squirrel moves before moving the camera MOVERATE = 9 # how fast the player moves BOUNCERATE = 6 # how fast the player bounces (large is slower) BOUNCEHEIGHT = 30 # how high the player bounces STARTSIZE = 25 # how big the player starts off WINSIZE = 300 # how big the player needs to be to win INVULNTIME = 2 # how long the player is invulnerable after being hit in seconds GAMEOVERTIME = 4 # how long the "game over" text stays on the screen in seconds MAXHEALTH = 3 # how much health the player starts with NUMGRASS = 80 # number of grass objects in the active area NUMSQUIRRELS = 30 # number of squirrels in the active area SQUIRRELMINSPEED = 3 # slowest squirrel speed SQUIRRELMAXSPEED = 7 # fastest squirrel speed DIRCHANGEFREQ = 2 # % chance of direction change per frame LEFT = 'left' RIGHT = 'right' """ This program has three data structures to represent the player, enemy squirrels, and grass background objects. The data structures are dictionaries with the following keys: Keys used by all three data structures: 'x' - the left edge coordinate of the object in the game world (not a pixel coordinate on the screen) 'y' - the top edge coordinate of the object in the game world (not a pixel coordinate on the screen) 'rect' - the pygame.Rect object representing where on the screen the object is located. Player data structure keys: 'surface' - the pygame.Surface object that stores the image of the squirrel which will be drawn to the screen. 'facing' - either set to LEFT or RIGHT, stores which direction the player is facing. 'size' - the width and height of the player in pixels. (The width & height are always the same.) 'bounce' - represents at what point in a bounce the player is in. 0 means standing (no bounce), up to BOUNCERATE (the completion of the bounce) 'health' - an integer showing how many more times the player can be hit by a larger squirrel before dying. Enemy Squirrel data structure keys: 'surface' - the pygame.Surface object that stores the image of the squirrel which will be drawn to the screen. 'movex' - how many pixels per frame the squirrel moves horizontally. A negative integer is moving to the left, a positive to the right. 'movey' - how many pixels per frame the squirrel moves vertically. A negative integer is moving up, a positive moving down. 'width' - the width of the squirrel's image, in pixels 'height' - the height of the squirrel's image, in pixels 'bounce' - represents at what point in a bounce the player is in. 0 means standing (no bounce), up to BOUNCERATE (the completion of the bounce) 'bouncerate' - how quickly the squirrel bounces. A lower number means a quicker bounce. 'bounceheight' - how high (in pixels) the squirrel bounces Grass data structure keys: 'grassImage' - an integer that refers to the index of the pygame.Surface object in GRASSIMAGES used for this grass object """ def main(): global FPSCLOCK, DISPLAYSURF, BASICFONT, L_SQUIR_IMG, R_SQUIR_IMG, GRASSIMAGES pygame.init() FPSCLOCK = pygame.time.Clock() pygame.display.set_icon(pygame.image.load('gameicon.png')) DISPLAYSURF = pygame.display.set_mode((WINWIDTH, WINHEIGHT)) pygame.display.set_caption('Squirrel Eat Squirrel') BASICFONT = pygame.font.Font('freesansbold.ttf', 32) # load the image files L_SQUIR_IMG = pygame.image.load('squirrel.png') R_SQUIR_IMG = pygame.transform.flip(L_SQUIR_IMG, True, False) GRASSIMAGES = [] for i in range(1, 5): GRASSIMAGES.append(pygame.image.load('grass%s.png' % i)) while True: runGame() def runGame(): # set up variables for the start of a new game invulnerableMode = False # if the player is invulnerable invulnerableStartTime = 0 # time the player became invulnerable gameOverMode = False # if the player has lost gameOverStartTime = 0 # time the player lost winMode = False # if the player has won # create the surfaces to hold game text gameOverSurf = BASICFONT.render('Game Over', True, WHITE) gameOverRect = gameOverSurf.get_rect() gameOverRect.center = (HALF_WINWIDTH, HALF_WINHEIGHT) winSurf = BASICFONT.render('You have achieved OMEGA SQUIRREL!', True, WHITE) winRect = winSurf.get_rect() winRect.center = (HALF_WINWIDTH, HALF_WINHEIGHT) winSurf2 = BASICFONT.render('(Press "r" to restart.)', True, WHITE) winRect2 = winSurf2.get_rect() winRect2.center = (HALF_WINWIDTH, HALF_WINHEIGHT + 30) # camerax and cameray are the top left of where the camera view is camerax = 0 cameray = 0 grassObjs = [] # stores all the grass objects in the game squirrelObjs = [] # stores all the non-player squirrel objects # stores the player object: playerObj = {'surface': pygame.transform.scale(L_SQUIR_IMG, (STARTSIZE, STARTSIZE)), 'facing': LEFT, 'size': STARTSIZE, 'x': HALF_WINWIDTH, 'y': HALF_WINHEIGHT, 'bounce':0, 'health': MAXHEALTH} moveLeft = False moveRight = False moveUp = False moveDown = False # start off with some random grass images on the screen for i in range(10): grassObjs.append(makeNewGrass(camerax, cameray)) grassObjs[i]['x'] = random.randint(0, WINWIDTH) grassObjs[i]['y'] = random.randint(0, WINHEIGHT) while True: # main game loop # Check if we should turn off invulnerability if invulnerableMode and time.time() - invulnerableStartTime > INVULNTIME: invulnerableMode = False # move all the squirrels for sObj in squirrelObjs: # move the squirrel, and adjust for their bounce sObj['x'] += sObj['movex'] sObj['y'] += sObj['movey'] sObj['bounce'] += 1 if sObj['bounce'] > sObj['bouncerate']: sObj['bounce'] = 0 # reset bounce amount # random chance they change direction if random.randint(0, 99) < DIRCHANGEFREQ: sObj['movex'] = getRandomVelocity() sObj['movey'] = getRandomVelocity() if sObj['movex'] > 0: # faces right sObj['surface'] = pygame.transform.scale(R_SQUIR_IMG, (sObj['width'], sObj['height'])) else: # faces left sObj['surface'] = pygame.transform.scale(L_SQUIR_IMG, (sObj['width'], sObj['height'])) # go through all the objects and see if any need to be deleted. for i in range(len(grassObjs) - 1, -1, -1): if isOutsideActiveArea(camerax, cameray, grassObjs[i]): del grassObjs[i] for i in range(len(squirrelObjs) - 1, -1, -1): if isOutsideActiveArea(camerax, cameray, squirrelObjs[i]): del squirrelObjs[i] # add more grass & squirrels if we don't have enough. while len(grassObjs) < NUMGRASS: grassObjs.append(makeNewGrass(camerax, cameray)) while len(squirrelObjs) < NUMSQUIRRELS: squirrelObjs.append(makeNewSquirrel(camerax, cameray)) # adjust camerax and cameray if