int lwgeom_is_empty(const LWGEOM *geom)
{
int result = LW_FALSE;
LWDEBUGF(4, "lwgeom_is_empty: got type %s",
lwtype_name(geom->type));
switch (geom->type)
{
case POINTTYPE:
return lwpoint_is_empty((LWPOINT*)geom);
break;
case LINETYPE:
return lwline_is_empty((LWLINE*)geom);
break;
case CIRCSTRINGTYPE:
return lwcircstring_is_empty((LWCIRCSTRING*)geom);
break;
case POLYGONTYPE:
return lwpoly_is_empty((LWPOLY*)geom);
break;
case TRIANGLETYPE:
return lwtriangle_is_empty((LWTRIANGLE*)geom);
break;
case MULTIPOINTTYPE:
case MULTILINETYPE:
case MULTIPOLYGONTYPE:
case COMPOUNDTYPE:
case CURVEPOLYTYPE:
case MULTICURVETYPE:
case MULTISURFACETYPE:
case POLYHEDRALSURFACETYPE:
case TINTYPE:
case COLLECTIONTYPE:
return lwcollection_is_empty((LWCOLLECTION *)geom);
break;
default:
lwerror("lwgeom_is_empty: unsupported input geometry type: %s",
lwtype_name(geom->type));
break;
}
return result;
}
static LWLINE* lwline_set_effective_area(const LWLINE *iline,int set_area, double trshld)
{
LWDEBUG(2, "Entered lwline_set_effective_area");
int set_m;
if(set_area)
set_m=1;
else
set_m=FLAGS_GET_M(iline->flags);
LWLINE *oline = lwline_construct_empty(iline->srid, FLAGS_GET_Z(iline->flags), set_m);
/* Skip empty case */
if( lwline_is_empty(iline) )
return lwline_clone(iline);
oline = lwline_construct(iline->srid, NULL, ptarray_set_effective_area(iline->points,2,set_area,trshld));
oline->type = iline->type;
return oline;
}
