class wanderer{

  float currentX;
  float currentY;
  float prevX;
  float  prevY;
  float  pprevX;
  float pprevY;
  float nextX;
  float nextY;
  float velocity;
  float prevvelocity;
  float acceleration;
 float[] parameters=new float[9];
 

  wanderer(float x, float y, float par[]){
    currentX=nextX=prevX=pprevX=x;
    currentY=nextY=prevY=pprevY=y;
    velocity=prevvelocity=0.0f;
    acceleration=0.0f;
    for(int i=0;i<9;i++){
      parameters[i]=par[i];
      
      }
    
  }

  void update(){
    nextX=parameters[8]*(sin(parameters[0]*currentY)+parameters[2]*cos(parameters[0]*currentX))+(1.0f-parameters[8])*(currentY+parameters[4]*currentX/abs(currentX)*sqrt(abs(parameters[5]*currentX-parameters[6])));
    nextY=parameters[8]*(sin(parameters[1]*currentX)+parameters[3]*cos(parameters[1]*currentY))+(1.0f-parameters[8])*(parameters[7]-currentX);
   
    pprevX=prevX;
    pprevY=prevY;
    prevX=currentX;
    prevY=currentY;
    currentX=nextX;
    currentY=nextY;
    prevvelocity=velocity;
    velocity=dist(currentX,currentY,prevX,prevY);
    acceleration=abs(velocity-prevvelocity);
  
    }



}