import java.awt.*;
public class Vertex implements java.io.Serializable{
  double x;
  double y;
  double k;
  double dis1;
  double dis2;

  double speed;
  int userdef;
  int states;
  DoubleVector d1;
  DoubleVector d2;
  DoubleVector time;
  DoubleVector init;
  DoubleVector mid;
  DoubleVector inter;
  int sw;
  int extreme;
  /* no extreme 0
     negative minimum 1
     positive minimum 2
     negative maximam 3
     positive maximam 4
		*/
  int ske;
  Vertex back;
  Vertex next;
  Vertex virtuallink;
  DoubleVector normal;
  DoubleVector tangent;
  public Vertex()
    {
       sw=0;
       ske=0;
       userdef=0;states=0;inter=new DoubleVector(0.0,0.0);
    }
  public Vertex(double dx,double dy)
    {
      x = dx;
      y = dy;
      extreme=0;
      sw=0;
      ske=0;
      userdef=0;states=0;inter=new DoubleVector(0.0,0.0);
    }
  public Vertex(double dx,double dy,int v)
    {
      x = dx;
      y = dy;
      extreme=v;
      sw=0;
      ske=0; 
      userdef=0;states=0;inter=new DoubleVector(0.0,0.0);
    }

}