lwgeom_mindistance3d_tolerance()

double lwgeom_mindistance3d_tolerance	(	const LWGEOM *	lw1,
		const LWGEOM *	lw2,
		double	tolerance
	)

Function handling 3d min distance calculations and dwithin calculations.

The difference is just the tolerance.

Definition at line 476 of file measures3d.c.

{
        assert(tolerance >= 0);
        if (!lwgeom_has_z(lw1) || !lwgeom_has_z(lw2))
        {
                lwnotice(
                    "One or both of the geometries is missing z-value. The unknown z-value will be regarded as \"any value\"");
 
                return lwgeom_mindistance2d_tolerance(lw1, lw2, tolerance);
        }
        DISTPTS3D thedl;
        thedl.mode = DIST_MIN;
        thedl.distance = DBL_MAX;
        thedl.tolerance = tolerance;
 
        if (lw_dist3d_recursive(lw1, lw2, &thedl))
        {
                if (thedl.distance <= tolerance)
                        return thedl.distance;
                if (lwgeom_solid_contains_lwgeom(lw1, lw2) || lwgeom_solid_contains_lwgeom(lw2, lw1))
                        return 0;
 
                return thedl.distance;
        }
 
        /* should never get here. all cases ought to be error handled earlier */
        lwerror("Some unspecified error.");
        return DBL_MAX;
}

References DIST_MIN, DISTPTS3D::distance, lw_dist3d_recursive(), lwerror(), lwgeom_has_z(), lwgeom_mindistance2d_tolerance(), lwgeom_solid_contains_lwgeom(), lwnotice(), DISTPTS3D::mode, and DISTPTS3D::tolerance.

Referenced by LWGEOM_dwithin3d(), lwgeom_mindistance3d(), and ST_3DIntersects().

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