PostGIS  2.3.7dev-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 3707 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.

3708 {
3709  LWT_ISO_NODE *node;
3710  int ret;
3711 
3712  node = _lwt_GetIsoNode( topo, nid );
3713  if ( ! node ) return -1;
3714 
3715  if ( lwt_be_ExistsCoincidentNode(topo, pt) )
3716  {
3717  lwfree(node);
3718  lwerror("SQL/MM Spatial exception - coincident node");
3719  return -1;
3720  }
3721 
3722  if ( lwt_be_ExistsEdgeIntersectingPoint(topo, pt) )
3723  {
3724  lwfree(node);
3725  lwerror("SQL/MM Spatial exception - edge crosses node.");
3726  return -1;
3727  }
3728 
3729  /* TODO: check that the new point is in the same containing face !
3730  * See https://trac.osgeo.org/postgis/ticket/3232
3731  */
3732 
3733  node->node_id = nid;
3734  node->geom = pt;
3735  ret = lwt_be_updateNodesById(topo, node, 1,
3737  if ( ret == -1 ) {
3738  lwfree(node);
3739  lwerror("Backend error: %s", lwt_be_lastErrorMessage(topo->be_iface));
3740  return -1;
3741  }
3742 
3743  lwfree(node);
3744  return 0;
3745 }
LWPOINT * geom
void lwfree(void *mem)
Definition: lwutil.c:242
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:3682
#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:102

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