GetRingEdges
Name
GetRingEdges — Returns the ordered set of signed edge identifiers met by walking on an a given edge side.
Synopsis
getfaceedges_returntype
GetRingEdges
(
varchar
atopology
, integer
aring
, integer
max_edges=null
)
;
Description
Returns the ordered set of signed edge identifiers met by walking on an a given edge side. Each output consists of a sequence and a signed edge id. Sequence numbers start with value 1.
If you pass a positive edge id, the walk starts on the left side of the corresponding edge and follows the edge direction. If you pass a negative edge id, the walk starts on the right side of it and goes backward.
If
max_edges
is not null no more than those records
are returned by that function. This is meant to be a safety parameter
when dealing with possibly invalid topologies.
![[Note]](images/note.png)
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This function uses edge ring linking metadata. |
Availability: 2.0.0