gidx_distance_m()

static double gidx_distance_m ( const GIDX *  a, const GIDX *  b  )

static

Definition at line 740 of file gserialized_gist_nd.c.

Referenced by gserialized_distance_nd().

{
        int mdim_a, mdim_b;
        double d, amin, amax, bmin, bmax;

        /* Base computation on least available dimensions */
        mdim_a = GIDX_NDIMS(a) - 1;
        mdim_b = GIDX_NDIMS(b) - 1;

        amin = GIDX_GET_MIN(a,mdim_a);
        amax = GIDX_GET_MAX(a,mdim_a);
        bmin = GIDX_GET_MIN(b,mdim_b);
        bmax = GIDX_GET_MAX(b,mdim_b);

    if ( ( amin <= bmax && amax >= bmin ) )
    {
      /* overlaps */
      d = 0;
    }
    else if ( bmax < amin )
    {
      /* is "left" */
      d = amin - bmax;
    }
    else
    {
      /* is "right" */
      assert( bmin > amax );
      d = bmin - amax;
    }

        return d;
}

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