PostGIS  2.5.7dev-r@@SVN_REVISION@@

◆ parse_gml_tin()

static LWGEOM* parse_gml_tin ( xmlNodePtr  xnode,
bool *  hasz,
int *  root_srid 
)
static

Parse GML Tin (and TriangulatedSurface) (3.1.1)

TODO handle also Tin attributes:

  • stopLines
  • breakLines
  • maxLength
  • position

Definition at line 1456 of file lwgeom_in_gml.c.

1457 {
1458  gmlSrs srs;
1459  xmlNodePtr xa;
1460  LWGEOM *geom=NULL;
1461  bool found=false;
1462 
1463  if (is_xlink(xnode)) xnode = get_xlink_node(xnode);
1464 
1465  parse_gml_srs(xnode, &srs);
1466  if (*root_srid == SRID_UNKNOWN && srs.srid != SRID_UNKNOWN)
1467  *root_srid = srs.srid;
1468 
1469  geom = (LWGEOM *)lwcollection_construct_empty(TINTYPE, *root_srid, 1, 0);
1470 
1471  if (xnode->children == NULL)
1472  return geom;
1473 
1474  /* Looking for gml:patches or gml:trianglePatches */
1475  for (xa = xnode->children ; xa != NULL ; xa = xa->next)
1476  {
1477  if (xa->type != XML_ELEMENT_NODE) continue;
1478  if (!is_gml_namespace(xa, false)) continue;
1479  if (!strcmp((char *) xa->name, "patches") ||
1480  !strcmp((char *) xa->name, "trianglePatches"))
1481  {
1482  found = true;
1483  break;
1484  }
1485  }
1486  if (!found) return geom; /* empty one */
1487 
1488  /* Processing each gml:Triangle */
1489  for (xa = xa->children ; xa != NULL ; xa = xa->next)
1490  {
1491  if (xa->type != XML_ELEMENT_NODE) continue;
1492  if (!is_gml_namespace(xa, false)) continue;
1493  if (strcmp((char *) xa->name, "Triangle")) continue;
1494 
1495  if (xa->children != NULL)
1496  geom = (LWGEOM*) lwtin_add_lwtriangle((LWTIN *) geom,
1497  (LWTRIANGLE *) parse_gml_triangle(xa, hasz, root_srid));
1498  }
1499 
1500  return geom;
1501 }
LWCOLLECTION * lwcollection_construct_empty(uint8_t type, int srid, char hasz, char hasm)
Definition: lwcollection.c:94
LWTIN * lwtin_add_lwtriangle(LWTIN *mobj, const LWTRIANGLE *obj)
Definition: lwtin.c:34
#define TINTYPE
Definition: liblwgeom.h:99
#define SRID_UNKNOWN
Unknown SRID value.
Definition: liblwgeom.h:188
static xmlNodePtr get_xlink_node(xmlNodePtr xnode)
Return a xmlNodePtr on a node referenced by a XLink or NULL otherwise.
static bool is_xlink(xmlNodePtr node)
Return true if current node contains a simple XLink Return false otherwise.
static bool is_gml_namespace(xmlNodePtr xnode, bool is_strict)
Return false if current element namespace is not a GML one Return true otherwise.
static void parse_gml_srs(xmlNodePtr xnode, gmlSrs *srs)
Parse gml srsName attribute.
static LWGEOM * parse_gml_triangle(xmlNodePtr xnode, bool *hasz, int *root_srid)
Parse GML Triangle (3.1.1)

References get_xlink_node(), is_gml_namespace(), is_xlink(), lwcollection_construct_empty(), lwtin_add_lwtriangle(), parse_gml_srs(), parse_gml_triangle(), struct_gmlSrs::srid, SRID_UNKNOWN, and TINTYPE.

Referenced by parse_gml().

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