public void act()
    {
        Keys();
        
        fall();
        arrow();
        checkFall(); 
        onGround();
        
        //onGround1();
        //onGround2();
        collisionOffset();
        //collisionOffset2();
        //pickupstick();
        checkCeiling();
        
    }
    
    
    
     private void fall()
    {
       setLocation( getX(), getY()+ vSpeed); 
        if( vSpeed<= 10)
      {
        vSpeed = vSpeed + gravity;
      } 
      isJumping = true; 
    }
    
    
    private void checkFall()
    {
        if( onGround() == true )
        {
            vSpeed = 0; 
        }
        else
        {
            fall(); 
        }
    }
    
   private void jump()
    {
       vSpeed = jumpHeight;
        isJumping = true; 
        fall();  
    }
    
    private void Keys()
    {
        if(Greenfoot.isKeyDown("right"))
        {
            setLocation(getX()+9, getY()); 
          animateR(); 
        }
        
        
        if(Greenfoot.isKeyDown("left"))
        {
            setLocation(getX()-9, getY()); 
            animateL(); 
        }
        
        if(Greenfoot.isKeyDown("space") && isJumping ==false)
        {
         jump(); 

        }    
    }
    
    public void animateR()
    {
       if (getImage() == right1)
       {
           setImage(right2); 
       }
       else if(getImage() == right2)
       {
           setImage(right3); 
       }
       else
       {
          setImage(right1);  
       }
    }
    
     public void animateL()
    {
        if(getImage() == left1)  
        {
            setImage(left2); 
        }
        else if( getImage() == left2) 
        {
            setImage(left3); 
        }
        else
        {
            setImage(left1); 
        }
    }
    
    
     private void moveToGround(Actor ground) 
    {
       int groundHeight = ground.getImage().getHeight(); 
       int newY = ground.getY() - ( groundHeight + getImage().getHeight() ) /2; 
                                    
       setLocation(getX (), newY );    
       isJumping = false;
       
    }
    
    
    private void jumpy()
    {
        if (getWorld() instanceof Instructions)
        {
            onGround();
        }
    }
    
    private boolean onGround()
    {
        int spriteHeight = getImage().getHeight(); 
        int lookForGround = spriteHeight/2; 
        Actor ground = getOneObjectAtOffset( 0 ,lookForGround, Platform.class ); 
        
        if( ground == null )
        { 
            isJumping = true; 
            return false; 
        }
        else
        {
            moveToGround(ground); 
           return true;  
           
        }
        
    }
    
     
    private boolean onGround1()
    {
        int spriteHeight = getImage().getHeight(); 
        int lookForGround = spriteHeight/2; 
        
        Actor ground = getOneObjectAtOffset( 0 ,lookForGround, Floor1.class ); 
        
        if( ground == null )
        { 
            isJumping = true; 
            return false; 
        }
        else
        {
            moveToGround(ground); 
           return true;  
           
        }
        
    }
    
        private boolean onGround2()
    {
        int spriteHeight = getImage().getHeight(); 
        int lookForGround = spriteHeight/2; 
        
        Actor ground = getOneObjectAtOffset( 0 ,lookForGround, Platform2.class ); 
        
        if( ground == null )
        { 
            isJumping = true; 
            return false; 
        }
        else
        {
            moveToGround(ground); 
           return true;  
           
        }
        
    }
    
    private void bopHead( Actor ceiling)
    {
        int ceilingHeight = ceiling.getImage().getHeight(); 
        int newY = ceiling. getY() + (ceilingHeight + getImage().getHeight())/2; 
        
        setLocation(getX(), newY ); 
        isJumping = false; 
        vSpeed = 3; 
    }
    
      
     private void collisionOffset()
    {
       Actor rightWall = getOneObjectAtOffset( getImage().getWidth()/4 , 0, Platform.class); 
           
       if (rightWall !=null)
       {
           setLocation(getX()-5, getY()); 
       }
         Actor leftWall = getOneObjectAtOffset( -getImage().getWidth()/4 , 0, Platform.class); 
       
       if (leftWall !=null)
       {
           setLocation(getX()+5, getY()); 
       }
         Actor topWall = getOneObjectAtOffset( 0 , -getImage().getHeight()/4 , Platform.class); 
       
       if (topWall !=null)
       {
           setLocation(getX(), getY()); 
       }
    }
    
      private void collisionOffset2()
    {
       Actor rightWall = getOneObjectAtOffset( getImage().getWidth()/4 , 0, Platform2.class); 
           
       if (rightWall !=null)
       {
           setLocation(getX()-5, getY()); 
       }
         Actor leftWall = getOneObjectAtOffset( -getImage().getWidth()/4 , 0, Platform2.class); 
       
       if (leftWall !=null)
       {
           setLocation(getX()+5, getY()); 
       }
         Actor topWall = getOneObjectAtOffset( 0 , -getImage().getHeight()/4 , Platform2.class); 
       
       if (topWall !=null)
       {
           setLocation(getX(), getY()); 
       }
    }
    
    
    private void worldEnd()
    {
       if (getY() == 649)
       {
        setLocation(120, 75); 
       }
    }
    
    
     private boolean checkCeiling()
    {
        int spriteHeight = getImage().getHeight();
        int lookForCeiling = spriteHeight/2;
        
        Actor ceiling =getOneObjectAtOffset( 0, -lookForCeiling, Platform.class); 
        
        if( ceiling != null) 
        {
            bopHead(ceiling); 
            return true;
        }
        else
        {
            return false; 
        }
    }
    
    private void arrow()
    {
        if(getWorld() instanceof Instructions)
        {
            if (isTouching(Arrow.class))
            {
                Greenfoot.setWorld(new level1() ); 
            }
        }   
    }
    
    //private void pickupstick()
    //{
        //if(getWorld() instanceof level1)
        //{
            //if (isTouching(Stick.class))
            //{
                //setImage(stick);
            //}
       // }
    //}
   
    
}