card_sprite.py 文件源码

def __init__(self, sprites, dest_pos, speed=None):
        """ Initializes an object of SpriteMove class.
        :param sprites: list of card sprites to be moved
        :param dest_pos: tuple with coordinates (x,y) of destination position
        :param speed: integer number, on how many pixels card(s) should move per frame.
                    If not specified (None), "move_speed" value from the config json is used.
        """
        self.sprites = sprites
        self.dest_pos = dest_pos
        for sprite in self.sprites:
            sprite.start_pos = sprite.pos
            sprite.angle = math.atan2(dest_pos[1] - sprite.start_pos[1],
                                      dest_pos[0] - sprite.start_pos[0])
            sprite.distance = SpriteMove.calc_distance(dest_pos, sprite.start_pos)
            if speed is None:
                sprite.speed = CardSprite.card_json["move_speed"]
            else:
                sprite.speed = speed
            sprite.completed = False