//=====================================================================
// File: Chua.java
//
//=====================================================================

//=====================================================================
// Chua Class
//
//=====================================================================
public class Chua extends NL3System {


  private double r;
  private double b;
  double c1=15.6, c2=1, c3=28, m0=-1.143, m1=-0.714;
  //-----------------------------------------------
  // The functions f(x,y,z), g(x,y,z) and h(x,y,z)
  //-----------------------------------------------
  double p(double x){
   return m1*x+(m0-m1)/2*(Math.abs(x+1)-Math.abs(x-1));}
  protected double f(double x, double y, double z, double t)
    { return( c1*(y-x-p(x)) ); }

  protected double g(double x, double y, double z, double t)
    { return( c2*(x-y+z) ); }

  protected double h(double x, double y, double z, double t)
    { return( -c3*y ); }

  Chua() {
    super();
  }

  public void setParams(double uc1, double uc2, double uc3,
                        double um0, double um1) {
     c1=uc1; c2=uc2; c3=uc3;
     m0=um0; m1=um1;
  }

};