class Selector{
  int x, y, x2, y2;
  color fillColor;
  int fillAlpha;
  
  public Selector(int _x, int _y){
    x = _x;
    y = _y;
    fillColor = #ff99ff;
    fillAlpha = 20;
  }
  
  void update(){
    rectMode(CORNERS);
    noStroke();
    fill(fillColor, fillAlpha);
    x2 = mouseX;
    y2 = mouseY;
    rect(x, y, x2, y2);
  }
  
  void checkCoor(){
    if(x>x2){
      int fx = x;
      x = x2;
      x2 = fx;
    }
    if(y>y2){
      int fy = y;
      y = y2;
      y2 = fy;
    }    
  }
}