import cStringIO, base64 import pygame from pygame.locals import * class Ball(pygame.sprite.Sprite): def __init__(self, color, initial_position): pygame.sprite.Sprite.__init__(self) ball_file = cStringIO.StringIO(base64.decodestring( """iVBORw0KGgoAAAANSUhEUgAAABkAAAAZCAYAAADE6YVjAAAAGXRFWHRTb2Z0d2FyZQBBZG9iZSBJ bWFnZVJlYWR5ccllPAAABBJJREFUeNqsVj2PG1UUvfPp8XictXfHa+9mlyJCNEQRWiToqACJAgGC LqJNlQZR0IFEj8RPSJkGGooUpEWJkGhR0tAAElI2tsfjjxnPjIdz7oyDF2wSUK72yN43793z7rkf Y8N2HFmbbVliGIYiyzIpy1Isy3oHeMswzLOyXJ2tVit9VhTFAxz5Cfge+A7IZIcZmySObQudwIE0 veanraB1w/O8l5x6D9eXy6UkSaJYLBa6BvsNuAV8uY3sCQlvX4LANM0Xw/Dgdhj2Xm02m+K6LqPR PXmeS5qmMp/PZTabyXQ6lclkosS1/QJcB+5vkthrAkoAuc4uHx//0B8MvCAIxG/5jEg0kpIkmcwX icTxBIhlHWEURXoedgW4B3wIfHuBJM9yMQ3j5PTk5N7g6MjtdrrS3e9Ku90GUUvc2hkdMYJx5Ivn NRC19UReRlRLR/sGeB34UUkMJBcJlcHg6K4SdDvS7/el1+tJp7MnQdCWRqMhDGWZLmWCCFog9rBm GBYc50rOKON4uqkSC+IQSC3moeX7N09PX/i4AwLkAoQDxeFhHziU8CCUzt6e+EFLc2QaJi4mFQHy kQLZMpME+WJF1sabdYA7Nq4jQbv9OZPs+75cgkSMYH9/X6PhJ9dpTLjruFLkBRyjACBd1BoLzzY8 T3O0IRntJvCZDXsTTnq262CzrzmgRHu4+QEIQhAxNzRWU1mTxfjOwvBIAOlIYNnWtja5bqM33mN/ sBEdx9bNPOQ1PWlqZJdAFKoMrEI6R+9gj6t7cUl1zjKnjFvsfaybr1Uqlv94ypXSKCud+aefpezs 7O3LL9s4c5U65gCrhGDDpUkqyWIuU1STweNlJRe7nAlmA+ZaVbnmiD4KFNEWC+3VqjB5YImDdMA+ YKONx2OVgxefojRL8CzmCxkOhxLhWYy+mGIvz6RKmv096X91PErP4Byazapbs3vZB45bVQqTzBzQ kjQBQSTnjx7JcDTCRSLkKNY9SbKACsttHKZdrIqHILnGCNhoDU0qG83U5mNUVTOKShRPYo3m8fAc nT/S/3mWFy2KrXKNOFbuI+Rr1FvLsB731Ho2m2pU7I1Sx8pSHTLaESIZjob6nfso2w77mSR3IMsN zh4mmLOIBAkO6fjAgESdV1MYiV4kiUZHRDjD3E0Qza580D+rjsUdAQEj4fRl8wUkqBttPeo5RlJI uB71jIASc8D+i4W8IoX8CviC5cuI+JlgpLsgcF1ng6RQyaoX1oWX1i67DTxe9w+9/EHW9VOrngCW ZfNFpmvVWOfUzZ/mfG0HwHBz4ZV1kz8nvLuL+YPnRPDJ00J8A/j9fzrnW+sjeUbjbP8amDyj86z+ tXL5PwzOC4njj4K3gavA8cazczYacLd+p/+6y8mfAgwAsRuLfp/zVLMAAAAASUVORK5CYII=""")) self.image = pygame.image.load(ball_file, 'file').convert_alpha() self.rect = self.image.fill(color, None, BLEND_ADD) self.rect.topleft = initial_position pygame.init() # screen = pygame.display.set_mode([350, 350]) # ball = Ball((255, 0, 0), (100, 100)) # screen.blit(ball.image, ball.rect) # pygame.display.update() # while pygame.event.poll().type != KEYDOWN: # pygame.time.delay(10) class MoveBall(Ball): def __init__(self, color, initial_position, speed, border): super(MoveBall, self).__init__(color, initial_position) self.speed = speed self.border = border self.update_time = 0 def update(self, current_time): if self.update_time < current_time: if self.rect.left < 0 or self.rect.left > self.border[0] - self.rect.w: self.speed[0] *= -1 if self.rect.top < 0 or self.rect.top > self.border[1] - self.rect.h: self.speed[1] *= -1 self.rect.x, self.rect.y = self.rect.x + self.speed[0], self.rect.y + self.speed[1] self.update_time = current_time + 10 pygame.init() screen = pygame.display.set_mode([350, 350]) balls = [] for color, location, speed in [([255, 0, 0], [50, 50], [2,4]), ([0, 255, 0], [100, 100], [3,2]), ([0, 0, 255], [150, 150], [4,3])]: balls.append(MoveBall(color, location, speed, (350, 350))) while True: if pygame.event.poll().type == QUIT: break screen.fill((0,0,0,)) current_time = pygame.time.get_ticks() for b in balls: b.update(current_time) screen.blit(b.image, b.rect) pygame.display.update()