getClosestEdge

LWT_ISO_EDGE*(* LWT_BE_CALLBACKS_T::getClosestEdge) (const LWT_BE_TOPOLOGY *topo, const LWPOINT *pt, uint64_t *numelems, int fields)

Get closest edge to a given point.

Parameters

topo	the topology to act upon
pt	the query point
numelems	output parameter, gets number of elements found or UINT64_MAX on error (

See also

lastErrorMessage)

Parameters

fields

fields to be filled in the returned structure, see LWT_COL_EDGE_* macros

Returns

an array of 1 edges or null in the following cases:

• no edges are in the topology ("numelems" is set to 0)

• error ("numelems" is set to UINT64_MAX)

Definition at line 851 of file liblwgeom_topo.h.