class Filter
{
  //PROPERTIES
 
  //PImage filterPic;
  Area area;

 
  //CONSTRUCTORS
  Filter (Area area) 
    {
      this.area = area;
      loadFilterImage ();
    }
 
  //METHODS
  
  void loadFilterImage ()
  {
    
    String imgName = " ";
    int nPic = (int)round(random(10)); //sets a random number for choosing the image.
    imgName = "scale" + nPic + ".jpg";
    //println (imgName);
    filterPic = loadImage(imgName);    
    //filterPic = loadImage("scale2.gif");
    //filterPic = loadImage("scale2.jpg");
    //filterPic2 = loadImage("move.jpg");
  }
  

  

  
  color getValue(float x, float y)
  {
    int px =   round ( map (x,   area.posX, area.posX+area.getWidth(),    0, filterPic.width) );
    int py =   round ( map (y,   area.posY, area.posY+area.getHeight(),   0, filterPic.height) );
    color cColor =  (int) brightness(filterPic.get (px, py));
    return cColor;
  }
 

 float setFilterScale (float x, float y)  //sets the scale factor of scalefilter
   {
     
     //Filter cFilter = area.getFilter("SCALE");
     //color cColor = (int) brightness(getValue (x, y));
     //int scalefactor = (int) brightness (cColor);
     //float scalefactor = (float) map (cColor,   0, 255     , 0.0, 2.0);
     float xpos = x;
     float ypos = y;
     
     int cColor = getValue(xpos, ypos);
     
     float scalefactor = 167/cColor;
      
     return scalefactor;
   }
   
   /* not implemented yet
  float setFilterMove (float x, float y)  //sets the motion of scalefilter
   {
     float xpos = x;
     float ypos = y;
     
     int cColor = getValue(xpos, ypos);
     
     int cColorUpLeft = getValue(xpos-getWidth/2, ypos-getHeight/2);
     int cColorUpRight = getValue(xpos+getWidth/2, ypos+getHeight/2);
     int cColorDownRight = getValue(xpos+getWidth/2, ypos-getHeight/2);
     int cColorDownLeft = getValue(xpos-getWidth/2, ypos-getHeight/2);
     
     //cColor-cColorUpLeft = 
    
     float scalefactor = 127/cColor;
      
     return scalefactor;
   }
   */
}