compositor.py 文件源码

def create_ring_coordinates(radius, count):
    """ Create coordinates arranged in a ring.

    :param radius: Radius of the ring.
    :type radius: float
    :param count: Count of coordinates to generate.
    :type count: int
    :returns: Tuple of the coordinates.
    :rtype: tuple
    """

    pixelstep = math.radians(360/count)
    pixels = []
    for index in range(0, count):
        pixels.append((radius * math.cos(index*pixelstep),
                       radius * math.sin(index*pixelstep)))
    return pixels