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; }
void lwtriangle_reverse(LWTRIANGLE *triangle) { if( lwtriangle_is_empty(triangle) ) return; ptarray_reverse(triangle->points); }