import pyglet, math


def distance(point_1=(0, 0), point_2=(0, 0)):
    """Returns the distance between two points"""
    return math.sqrt((point_1[0] - point_2[0]) ** 2 + (point_1[1] - point_2[1]) ** 2)


def center_image(image):
    """Sets an image's anchor point to its center"""
    image.anchor_x = image.width / 2
    image.anchor_y = image.height / 2
