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import pygame
class BouncingBox(pygame.sprite.Sprite):
def __init__(self, imagesList, initial_position):
pygame.sprite.Sprite.__init__(self)
self.images = imagesList
self.listLen = len(imagesList)
self.listPos = 0
self.image = imagesList[self.listPos]
self.rect = self.image.get_rect()
self.rect.topleft = initial_position
self.going_down = True # Start going downwards
self.going_right = True # Start going right
def update(self, right, bottom):
# If we're at the top or bottom of the screen, switch directions.
if self.rect.bottom >= bottom: self.going_down = False
elif self.rect.top <= 0: self.going_down = True
# If we're at the right or left of the screen, switch directions.
if self.rect.right >= right: self.going_right = False
elif self.rect.left <= 0: self.going_right = True
# Move our position up or down by 2 pixels
if self.going_down: self.rect.top += 2
else: self.rect.top -= 2
# Move our position left or right by 2 pixels
if self.going_right: self.rect.right += 2
else: self.rect.right -= 2
if self.listPos < self.listLen - 1:
self.listPos += 1
else:
self.listPos = 0
self.image = self.images[self.listPos]
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