Get curve point coordinates by index.

        Parameters
        ----------
        idx : `int`
            Point index.
        size : `int`
            Curve size.

        Returns
        -------
        (`int`, `int`)
            Point coordinates.

def get_point(cls, idx, size):
        """Get curve point coordinates by index.

        Parameters
        ----------
        idx : `int`
            Point index.
        size : `int`
            Curve size.

        Returns
        -------
        (`int`, `int`)
            Point coordinates.
        """
        x, y = cls.POSITION[idx % 4]
        idx //= 4
        block_size = 2
        while block_size < size:
            block_idx = idx % 4
            x, y = cls.get_point_in_block(x, y, block_idx, block_size)
            idx //= 4
            block_size *= 2
        return x, y