1330 static const double DEFAULT_MITRE_LIMIT = 5.0;
1331 static const int DEFAULT_JOIN_STYLE = JOIN_ROUND;
1332 double mitreLimit = DEFAULT_MITRE_LIMIT;
1333 int joinStyle = DEFAULT_JOIN_STYLE;
1335 char *paramstr = NULL;
1339 gser_input = PG_GETARG_GSERIALIZED_P(0);
1340 size = PG_GETARG_FLOAT8(1);
1343 if (size == 0) PG_RETURN_POINTER(gser_input);
1347 if ( ! lwgeom_input )
1348 lwpgerror(
"ST_OffsetCurve: lwgeom_from_gserialized returned NULL");
1352 PG_RETURN_POINTER(gser_input);
1357 text *wkttext = PG_GETARG_TEXT_P(2);
1358 paramstr = text_to_cstring(wkttext);
1360 POSTGIS_DEBUGF(3,
"paramstr: %s", paramstr);
1362 for ( param=paramstr; ; param=NULL )
1365 param = strtok(param,
" ");
1367 POSTGIS_DEBUGF(3,
"Param: %s", param);
1370 val = strchr(key,
'=');
1371 if (!val || *(val + 1) ==
'\0')
1373 lwpgerror(
"ST_OffsetCurve: Missing value for buffer parameter %s", key);
1379 POSTGIS_DEBUGF(3,
"Param: %s : %s", key, val);
1381 if ( !strcmp(key,
"join") )
1383 if ( !strcmp(val,
"round") )
1385 joinStyle = JOIN_ROUND;
1387 else if ( !(strcmp(val,
"mitre") && strcmp(val,
"miter")) )
1389 joinStyle = JOIN_MITRE;
1391 else if ( ! strcmp(val,
"bevel") )
1393 joinStyle = JOIN_BEVEL;
1398 "Invalid buffer end cap style: %s (accept: 'round', 'mitre', 'miter' or 'bevel')",
1403 else if ( !strcmp(key,
"mitre_limit") ||
1404 !strcmp(key,
"miter_limit") )
1407 mitreLimit = atof(val);
1409 else if ( !strcmp(key,
"quad_segs") )
1412 quadsegs = atoi(val);
1417 "Invalid buffer parameter: %s (accept: 'join', 'mitre_limit', 'miter_limit and 'quad_segs')",
1422 POSTGIS_DEBUGF(3,
"joinStyle:%d mitreLimit:%g", joinStyle, mitreLimit);
1426 lwgeom_result =
lwgeom_offsetcurve(lwgeom_input, size, quadsegs, joinStyle, mitreLimit);
1429 lwpgerror(
"ST_OffsetCurve: lwgeom_offsetcurve returned NULL");
1431 gser_result = geometry_serialize(lwgeom_result);
1434 PG_RETURN_POINTER(gser_result);
LWGEOM * lwgeom_from_gserialized(const GSERIALIZED *g)
Allocate a new LWGEOM from a GSERIALIZED.
void lwgeom_free(LWGEOM *geom)
LWGEOM * lwgeom_offsetcurve(const LWGEOM *geom, double size, int quadsegs, int joinStyle, double mitreLimit)
static int lwgeom_is_empty(const LWGEOM *geom)
Return true or false depending on whether a geometry is an "empty" geometry (no vertices members)