lwt_edgeend.h

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 * PostGIS - Spatial Types for PostgreSQL
 * http://postgis.net
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 * PostGIS is free software: you can redistribute it and/or modify
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 * You should have received a copy of the GNU General Public License
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 * Copyright (C) 2024 Sandro Santilli <strk@kbt.io>
 *
 **********************************************************************/
 
#ifndef _LWT_EDGEEND_H
#define _LWT_EDGEEND_H 1
 
#include "liblwgeom.h"
#include "liblwgeom_topo.h"
 
/* Single edge end */
typedef struct LWT_EDGEEND_t {
  const LWT_ISO_EDGE *edge; /* Edge this edgeend comes from (parent edge) */
  POINT2D p0; /* point incident to the node */
  POINT2D p1; /* point away from the node */
  int outgoing; /* 1 if p0 is the start_node of the parent edge, 0 if it is the end_node of it */
  double azimuth; /* azimuth of the edge end (p0 to p1) */
} LWT_EDGEEND;
 
/*
 * @param edge an edge, needs have a geometry
 * @param outgoing 1 if p0 is the start_node of the parent edge, 0 if it is the end_node of it
 */
LWT_EDGEEND *lwt_edgeEnd_fromEdge( const LWT_ISO_EDGE *edge, int outgoing );
 
/*
 * Release memory owned by an edgeend
 */
void lwt_edgeEnd_release( LWT_EDGEEND *end );
 
#endif /* !defined _LWT_EDGEEND_H  */