code: public void clear()
      {
          DelaunayTriangle t;
          for( int i=0; i<3; i++ )
          {
              t = neighbors[i];
              if( t != null )
              {
                  t.clearNeighbor( this );
              }
          }
          clearNeighbors();
          points[0]=points[1]=points[2]=null;
      }
docs: Clears all references to all other triangles and points