How to use

setNext

method

in

org.poly2tri.geometry.polygon.PolygonPoint

/**
 * Will add a point after the last point added
 * 
 * @param p
 */
public void addPoint(PolygonPoint p )    
{
  p.setPrevious( _last );
  p.setNext( _last.getNext() );
  _last.setNext( p );
  _points.add( p );
}
 

public void addPoints( List<PolygonPoint> list )    
{
  PolygonPoint first;
  for( PolygonPoint p : list )
  {
    p.setPrevious( _last );
    if( _last != null )
    {
      p.setNext( _last.getNext() );
      _last.setNext( p );
    }
    _last = p;
    _points.add( p );
  }
  first = (PolygonPoint)_points.get(0);
  _last.setNext( first );
  first.setPrevious( _last );
}
 

/**
 * Will insert a point in the polygon after given point
 */
public void insertPointAfter( PolygonPoint a, PolygonPoint newPoint )
{
  // Validate that 
  int index = _points.indexOf( a );
  if( index != -1 )
  {
    newPoint.setNext( a.getNext() );
    newPoint.setPrevious( a );
    a.getNext().setPrevious( newPoint );
    a.setNext( newPoint );
    _points.add( index+1, newPoint );
  }
  else
  {
    throw new RuntimeException( "Tried to insert a point into a Polygon after a point not belonging to the Polygon" );
  }
}

public void removePoint( PolygonPoint p )
{
  PolygonPoint next, prev;
  
  next = p.getNext();
  prev = p.getPrevious();
  prev.setNext( next );
  next.setPrevious( prev );
  _points.remove( p );
}