PostGIS  2.5.7dev-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 3561 of file lwgeom_topo.c.

3562 {
3563  LWT_ISO_NODE *node;
3564  int ret;
3565 
3566  node = _lwt_GetIsoNode( topo, nid );
3567  if ( ! node ) return -1;
3568 
3569  if ( lwt_be_ExistsCoincidentNode(topo, pt) )
3570  {
3571  lwfree(node);
3572  lwerror("SQL/MM Spatial exception - coincident node");
3573  return -1;
3574  }
3575 
3576  if ( lwt_be_ExistsEdgeIntersectingPoint(topo, pt) )
3577  {
3578  lwfree(node);
3579  lwerror("SQL/MM Spatial exception - edge crosses node.");
3580  return -1;
3581  }
3582 
3583  /* TODO: check that the new point is in the same containing face !
3584  * See https://trac.osgeo.org/postgis/ticket/3232
3585  */
3586 
3587  node->node_id = nid;
3588  node->geom = pt;
3589  ret = lwt_be_updateNodesById(topo, node, 1,
3591  if ( ret == -1 ) {
3592  lwfree(node);
3593  lwerror("Backend error: %s", lwt_be_lastErrorMessage(topo->be_iface));
3594  return -1;
3595  }
3596 
3597  lwfree(node);
3598  return 0;
3599 }
void lwfree(void *mem)
Definition: lwutil.c:244
#define LWT_COL_NODE_GEOM
void lwerror(const char *fmt,...)
Write a notice out to the error handler.
Definition: lwutil.c:190
int lwt_be_ExistsEdgeIntersectingPoint(LWT_TOPOLOGY *topo, LWPOINT *pt)
Definition: lwgeom_topo.c:402
const char * lwt_be_lastErrorMessage(const LWT_BE_IFACE *be)
Definition: lwgeom_topo.c:120
static LWT_ISO_NODE * _lwt_GetIsoNode(LWT_TOPOLOGY *topo, LWT_ELEMID nid)
Definition: lwgeom_topo.c:3536
static int lwt_be_updateNodesById(LWT_TOPOLOGY *topo, const LWT_ISO_NODE *nodes, int numnodes, int upd_fields)
Definition: lwgeom_topo.c:314
int lwt_be_ExistsCoincidentNode(LWT_TOPOLOGY *topo, LWPOINT *pt)
Definition: lwgeom_topo.c:390
LWT_ELEMID node_id
LWPOINT * geom
const LWT_BE_IFACE * be_iface

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.

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