getNodeByFace

LWT_ISO_NODE*(* LWT_BE_CALLBACKS_T::getNodeByFace) (const LWT_BE_TOPOLOGY *topo, const LWT_ELEMID *faces, int *numelems, int fields, const GBOX *box)

Get isolated nodes contained in any of the given faces.

Parameters

topo	the topology to act upon
faces	an array of face identifiers
numelems	input/output parameter, pass number of face identifiers in the input array, gets number of nodes in output array if the return is not null, otherwise see

Returns

section for semantic.

Parameters

fields	fields to be filled in the returned structure, see LWT_COL_NODE_* macros
box	optional bounding box to further restrict matches, use NULL for no further restriction.

Returns

an array of nodes or NULL in the following cases:

• no nod found ("numelems" is set to 0)
• error ("numelems" is set to -1,

See also

lastErrorMessage)

Definition at line 677 of file liblwgeom_topo.h.