class MovingSprite
{
   float x, y ;
   float xVel, yVel ;
   PImage theImage ;
   float msWidth, msHeight ;
   boolean isHidden ;   // true, if currently hidden
   
   
   MovingSprite(String inImageName, float inX, float inY)
   {
     
     xVel = 1 ;
     yVel = 2 ;
     theImage = loadImage(inImageName) ;
     msWidth = theImage.width ;      // the width of the MS object
     msHeight = theImage.height ;    // the height of the MS object
     x = inX ;
     y = inY ;
     isHidden = false ;
   }
   
   // setters
   void setIsHidden(boolean inValue) { isHidden = inValue;}
   
   // getter
   float getX() { return (x) ;}
   float getY() { return (y) ; }
   boolean getIsHidden() { return isHidden ;}  // return true if hidden
   boolean isVisible() {  return !isHidden ;}
   
   void updateLocation()
   {
     x = x + xVel ;
     y = y + yVel ;
     
     if ( (x <=0) ||  ( (x+msWidth) >= width)   )
       xVel = xVel * -1 ;
     if (  (y <= 0) || ( (y+msHeight) >= height)  )
       yVel = yVel * -1 ;
       
   }
   
   void drawSprite()
   {
     if (!isHidden)
       image(theImage,x,y) ;
   }
   
   boolean containsPoint(float inPx, float inPy)
   // returns true if MS contains parameter point, else returns false
   {
      if ( (inPx > x) && (inPx < (x + msWidth) ) && (inPy > y) && (inPy < (y+msHeight) ) )
        return (true) ; 
      else
        return(false) ;
   }
   
   
   
   
}


//=============================
MovingSprite ms1, ms2, ms3, ms4, ms5 ;
int numNotHidden ;

void setup()
{
  size(200,200) ;
  numNotHidden = 4 ;
  ms1 = new MovingSprite("smiley1.png",0,0) ;
 
  ms2 = new MovingSprite("smiley1.png",50,50) ;
 
  ms3 = new MovingSprite("smiley1.png",100,0) ;
  ms4 = new MovingSprite("smiley1.png",0,100) ;
  ms5 = new MovingSprite("smiley1.png",random(width - 100),random(height -100)) ;
 
  // ms1.drawSprite() ;
  
}

void draw()
{
  background(100) ;
  ms1.updateLocation() ;  
  ms1.drawSprite() ;
  ms2.updateLocation() ;
  ms2.drawSprite() ;
  ms3.updateLocation() ;
  ms3.drawSprite() ;
  ms4.updateLocation() ;
  ms4.drawSprite() ;
  // ms5.updateLocation() ;
  // ms5.drawSprite() ;
  
}


void mousePressed()
{
  if (  ms1.isVisible()  && ms1.containsPoint(mouseX,mouseY) )
  {
    ms1.setIsHidden(true) ;
    numNotHidden -= 1 ;    // numNotHideen = numNotHidden - 1 ;
  }
  if (ms2.isVisible() && ms2.containsPoint(mouseX,mouseY) )
  {
    ms2.setIsHidden(true) ;
    numNotHidden -= 1 ;
  }
  if (ms3.isVisible() && ms3.containsPoint(mouseX,mouseY) )
  {
    ms3.setIsHidden(true) ;
    numNotHidden -=1 ;
  }
  if (ms4.isVisible() && ms4.containsPoint(mouseX,mouseY) )
  {
    ms4.setIsHidden(true) ;
    numNotHidden -= 1 ;
  }
  println(numNotHidden) ;
  
  if (numNotHidden == 0)
    println("game over") ;
}