PostGIS  2.5.0dev-r@@SVN_REVISION@@
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 3747 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.

3748 {
3749  LWT_ISO_NODE *node;
3750  int ret;
3751 
3752  node = _lwt_GetIsoNode( topo, nid );
3753  if ( ! node ) return -1;
3754 
3755  if ( lwt_be_ExistsCoincidentNode(topo, pt) )
3756  {
3757  lwfree(node);
3758  lwerror("SQL/MM Spatial exception - coincident node");
3759  return -1;
3760  }
3761 
3762  if ( lwt_be_ExistsEdgeIntersectingPoint(topo, pt) )
3763  {
3764  lwfree(node);
3765  lwerror("SQL/MM Spatial exception - edge crosses node.");
3766  return -1;
3767  }
3768 
3769  /* TODO: check that the new point is in the same containing face !
3770  * See https://trac.osgeo.org/postgis/ticket/3232
3771  */
3772 
3773  node->node_id = nid;
3774  node->geom = pt;
3775  ret = lwt_be_updateNodesById(topo, node, 1,
3777  if ( ret == -1 ) {
3778  lwfree(node);
3779  lwerror("Backend error: %s", lwt_be_lastErrorMessage(topo->be_iface));
3780  return -1;
3781  }
3782 
3783  lwfree(node);
3784  return 0;
3785 }
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:3722
#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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