PostGIS  2.5.1dev-r@@SVN_REVISION@@

◆ lwt_MoveIsoNode()

int lwt_MoveIsoNode ( LWT_TOPOLOGY topo,
LWT_ELEMID  node,
LWPOINT pt 
)

Move an isolated node.

For ST_MoveIsoNode

Parameters
topothe topology to operate on
nodethe identifier of the nod to be moved
ptthe new node position
Returns
0 on success, -1 on error (liblwgeom error handler will be invoked with error message)

Definition at line 3541 of file lwgeom_topo.c.

References _lwt_GetIsoNode(), LWT_TOPOLOGY_T::be_iface, LWT_ISO_NODE::geom, lwerror(), lwfree(), lwt_be_ExistsCoincidentNode(), lwt_be_ExistsEdgeIntersectingPoint(), lwt_be_lastErrorMessage(), lwt_be_updateNodesById(), LWT_COL_NODE_GEOM, and LWT_ISO_NODE::node_id.

3542 {
3543  LWT_ISO_NODE *node;
3544  int ret;
3545 
3546  node = _lwt_GetIsoNode( topo, nid );
3547  if ( ! node ) return -1;
3548 
3549  if ( lwt_be_ExistsCoincidentNode(topo, pt) )
3550  {
3551  lwfree(node);
3552  lwerror("SQL/MM Spatial exception - coincident node");
3553  return -1;
3554  }
3555 
3556  if ( lwt_be_ExistsEdgeIntersectingPoint(topo, pt) )
3557  {
3558  lwfree(node);
3559  lwerror("SQL/MM Spatial exception - edge crosses node.");
3560  return -1;
3561  }
3562 
3563  /* TODO: check that the new point is in the same containing face !
3564  * See https://trac.osgeo.org/postgis/ticket/3232
3565  */
3566 
3567  node->node_id = nid;
3568  node->geom = pt;
3569  ret = lwt_be_updateNodesById(topo, node, 1,
3571  if ( ret == -1 ) {
3572  lwfree(node);
3573  lwerror("Backend error: %s", lwt_be_lastErrorMessage(topo->be_iface));
3574  return -1;
3575  }
3576 
3577  lwfree(node);
3578  return 0;
3579 }
LWPOINT * geom
void lwfree(void *mem)
Definition: lwutil.c:244
int lwt_be_ExistsEdgeIntersectingPoint(LWT_TOPOLOGY *topo, LWPOINT *pt)
Definition: lwgeom_topo.c:402
const LWT_BE_IFACE * be_iface
int lwt_be_ExistsCoincidentNode(LWT_TOPOLOGY *topo, LWPOINT *pt)
Definition: lwgeom_topo.c:390
LWT_ELEMID node_id
static int lwt_be_updateNodesById(LWT_TOPOLOGY *topo, const LWT_ISO_NODE *nodes, int numnodes, int upd_fields)
Definition: lwgeom_topo.c:314
static LWT_ISO_NODE * _lwt_GetIsoNode(LWT_TOPOLOGY *topo, LWT_ELEMID nid)
Definition: lwgeom_topo.c:3516
#define LWT_COL_NODE_GEOM
const char * lwt_be_lastErrorMessage(const LWT_BE_IFACE *be)
Definition: lwgeom_topo.c:120
void lwerror(const char *fmt,...)
Write a notice out to the error handler.
Definition: lwutil.c:190
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