class MySegment {

  MyPoint start;  // members of class
  MyPoint end;
  color blue = color(0,0,255);                 // default color
  color red = color(255,0,0);                 // selected color
  boolean isSelected = false;             // is this segment selected?


  //********** Constructor
  MySegment(MyPoint p1, MyPoint p2){

    start = new MyPoint(p1.x, p1.y);
    end   = new MyPoint(p2.x, p2.y);
   
  }

  //********** Move
  void move(float xoff, float yoff){

    start.move(xoff, yoff);
    end.move(xoff, yoff);
  }

  //********** Rotate
  void rotate (float angle, MyPoint ref) {
    start.rotate(angle, ref);
    end.rotate(angle, ref);
  }

  //********** Scale
  void scale(float xs, float ys, MyPoint ref){
    start.scale(xs, ys, ref);
    end.scale(xs, ys, ref);
  }
  
  //*********** centroid
  MyPoint centroid(){
    MyPoint c = new MyPoint(0.,0.);
    c.x = (start.x+end.x)/2.;
    c.y = (start.y+end.y)/2.;
    return c;
  }

  //*********** draw
  void draw(){

    if(isSelected)
      stroke(red);
    else
      stroke(blue);
    line((int)start.x, (int)start.y, (int)end.x, (int)end.y);

  }

  //******** Select
  boolean select(float xpick, float ypick, float tolerance){

    if(start.select(xpick, ypick, tolerance)==true  ||
      end.select(xpick, ypick, tolerance)==true)    {
      isSelected = true;
      return true;
    }
    else {
      isSelected = false;
    }
    return false;
  }

}