_lwt_DistinctVertexes2D()

static int _lwt_DistinctVertexes2D ( const POINTARRAY *  pa, int  from, int  dir, POINT2D *  p0, POINT2D *  p1  )

static

Definition at line 40 of file lwt_edgeend.c.

{
  int i, toofar, inc;
 
  if ( dir > 0 ) {
    toofar = pa->npoints;
    inc = 1;
  } else {
    toofar = -1;
    inc = -1;
  }
 
  LWDEBUGF(1, "first point is index %d", from);
  getPoint2d_p(pa, from, p0);
  for ( i = from+inc; i != toofar; i += inc )
  {
    LWDEBUGF(1, "testing point %d", i);
    getPoint2d_p(pa, i, p1); /* pick next point */
    if ( P2D_SAME_STRICT(p0, p1) ) continue; /* equal to startpoint */
    /* this is a good one, neither same of start nor of end point */
    return 1; /* found */
  }
 
  /* no distinct vertices found */
  return 0;
}

References getPoint2d_p(), LWDEBUGF, POINTARRAY::npoints, and P2D_SAME_STRICT.

Referenced by lwt_edgeEnd_fromEdge().

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