def main():
pygame.init()
pygame.display.set_caption('Interference')
pygame.key.set_repeat(10, 10) # keypresses to auto-repeat every 10msec
rects = [] # create a list
screen = pygame.display.set_mode((screenwidth, screenheight))
background = Background("assets/level1-stage.gif", [0, 0])
bgsurface = pygame.Surface(screen.get_size())
bgsurface = bgsurface.convert() # speeds up blitting
bgsurface.fill([0, 0, 255]) # set background to blue
# if we only use a portion of the background image, change the first two values here:
bgsurface.blit(
background.image.subsurface(0, 0, screenwidth, screenheight), (0, 0))
screen.blit(bgsurface, (0, 0)) # get the bgsurface onto the screen surface
pygame.display.update() # update the entire display
# instantiate the sprites
ball_sprite = Ball()
bat_sprite = Bat()
# store all sprite rects we create into this list
rects.append(ball_sprite.getrect())
rects.append(bat_sprite.getrect())
balls_group = pygame.sprite.Group(ball_sprite)
characters_group = pygame.sprite.Group(bat_sprite)
while True: # this is a forever loop
ev = pygame.event.poll()
if ev.type == pygame.QUIT:
pygame.quit()
sys.exit(0)
batmoved = 0
if ev.type == KEYDOWN: # button pressed?
if (ev.key == btn_left):
batloc = [-1, 0]
bat_sprite.movepos(batloc)
ball_sprite.accel(-1) # influence ball speed if needed
batmoved = -1
elif (ev.key == btn_right):
batloc = [1, 0]
bat_sprite.movepos(batloc)
ball_sprite.accel(1) # influence ball speed if needed
batmoved = 1
# check for collisions
collide = pygame.sprite.collide_rect(bat_sprite, ball_sprite)
if collide:
ball_sprite.collision(bat_sprite.getrect(), batmoved)
# clear the sprite(s) and then update and redraw them
characters_group.clear(screen, bgsurface)
balls_group.clear(screen, bgsurface)
characters_group.update()
balls_group.update()
characters_group.draw(screen)
balls_group.draw(screen)
pygame.display.update(rects)
