How to use the pyscroll.orthographic.BufferedRenderer function in pyscroll

logger = logging.getLogger('isometric')


def vector3_to_iso(vector3):
    offset = 0, 0
    return ((vector3[0] - vector3[1]) + offset[0],
            ((vector3[0] + vector3[1]) >> 1) - vector3[2] + offset[1])


def vector2_to_iso(vector2):
    offset = 0, 0
    return ((vector2[0] - vector2[1]) + offset[0],
            ((vector2[0] + vector2[1]) >> 1) + offset[1])


class IsometricBufferedRenderer(BufferedRenderer):
    """ TEST ISOMETRIC

    here be dragons.  lots of odd, untested, and unoptimised stuff.

    - coalescing of surfaces is not supported
    - drawing may have depth sorting issues
    """

    def _draw_surfaces(self, surface, rect, surfaces):
        if surfaces is not None:
            [(surface.blit(i[0], i[1]), i[2]) for i in surfaces]

    def _initialize_buffers(self, view_size):
        """ Create the buffers to cache tile drawing

        :param view_size: (int, int): size of the draw area