class MyPoint {
  
    float x, y;  // members of class
    boolean isSelected = false;     // is this point selected?
  
    //********** Constructor
    MyPoint(float xin, float yin){
  
      x = xin;
      y = yin;
    }
  
    //********** Move
    void move(float xoff, float yoff){
      x += xoff;
      y += yoff;
    }
  
    //********** Rotate
    void rotate (float angle, MyPoint ref) {
      float cosa, sina;
      cosa = cos(PI/180*angle);
      sina = sin(PI/180*angle);
      float newx =  (x-ref.x) * cosa - (y-ref.y) * sina + ref.x;
      float newy =  (y-ref.y) * cosa + (x-ref.x) * sina + ref.y;
      x = newx;
      y = newy;
    }
  
    //********** Scale
    void scale(float xs, float ys, MyPoint ref){
      x = (x-ref.x)*xs + ref.x;
      y = (y-ref.y)*ys + ref.y;
    }
  
    //************* Select
    boolean select(float xpick, float ypick, float tolerance){
  
      if(abs(x - xpick) < tolerance  && 
        abs(y - ypick) < tolerance ) {
        isSelected = true;
        return true;
      }
      else {
        isSelected = false;
      }
      return false;
  
    }
  
  }