Greenfoot

Svek

2014/6/30

#

Hey im making a game an i use hitpoints but if the hitpoints are 0 the world needs to change but i don't know how this is my code for the enemy's:

{
    private boolean left = false;
    public int hitpoints;
    public int speed;
    public int jump;
    /**
     * Checks to see if the enemy is shot, if so then the enemy is removed from
     * the world
     */
    public void act() {
        if (getX() - getImage().getWidth() / 2 <= 1  ||
        getX() + getImage().getWidth() / 2 >= getWorld().getWidth()-1)
        {
            left = !left;
            setLocation( getX() , getY() +jump);
        }

        if(left)
        {
            move(-speed);
        }
        else {
            move(speed);
        }

        if(isTouching(Human.class)){
            removeTouching(Human.class);
            Greenfoot.setWorld(new Invaded());  
        }

        if(hitpoints <= 0)
        {
            getWorld().removeObject(this);
        }


    }// down is the pixels by which your enemy should come down    
}

this is my code for an enemy subclass:

public class SpaceShip2 extends Enemy
{
   public SpaceShip2()
    {
        hitpoints = 1;
        speed = 5;
        jump = 50;
    }
}

and this is my code for the bullet:

public void act() 
    {
        setLocation(getX(), getY() -10);
        if(getY() <= 20) 
        { 
            World SpaceWorld;
            SpaceWorld = getWorld();
            SpaceWorld.removeObject(this);

        }

        if ( getWorld() != null)
        {
            Enemy theEnemy;
            theEnemy = (Enemy) getOneIntersectingObject(Enemy.class);
            if (theEnemy != null)
            {
                SpaceWorld spaceWorld;  
                spaceWorld = (SpaceWorld) getWorld();      
                theEnemy.hitpoints--;
                Counter score = ((SpaceWorld)getWorld()).getScore(); 
                score.add(1);
                spaceWorld.removeObject(this);
                

            }

            
        }

    }
}

Please help!

lordhershey

2014/6/30

#

Looks like where you are testing for hitpoints you are only removing the object and not changing the world.

        if(isTouching(Human.class)){
            removeTouching(Human.class);
            Greenfoot.setWorld(new Invaded());  
        }

        if(hitpoints <= 0)
        {
            getWorld().removeObject(this);
            /* 
              Is this where you would change the world? 
            */
            Greenfoot.setWorld(new TotallyKilledThisShipSoIWin());
        }

Svek

2014/6/30

#

i get what ur saying but i have 2 spaceships one with 5lifes and one with 1life. if the spaceship with 5hitpoints (lifes) is killed the world need to change. If i use ur code nothing will happen. or it wil also happen if i kill the spaceship with one life. What do i need to chance??

Svek

2014/6/30

#

i get what ur saying but i have 2 spaceships one with 5lifes and one with 1life. if the spaceship with 5hitpoints (lifes) is killed the world need to change. If i use ur code nothing will happen. or it wil also happen if i kill the spaceship with one life. What do i need to chance??

lordhershey

2014/6/30

#

you can put something in your world act() method to get the number of ships that exist, if the list is empty then do the world change.

Svek

2014/6/30

#

how do u mean? this is my world code:

public class SpaceWorld extends World
{
    private Human thePlayer;
    private SpaceShip theEnemy;
    private Counter ScoreCounter;
    private GreenfootSound music = new GreenfootSound("shipwreckers-Overboard main menu theme.mp3");

    public SpaceWorld()
    {    
        super(1180, 670, 1); 

        thePlayer = new Human();
        theEnemy = new SpaceShip();
        Spawn();
        HumanSpawn();
        music.playLoop();
        ScoreCounter = new Counter("Score: ");
        addObject(ScoreCounter, 60, 30);

    }

    
    public void HumanSpawn()
    {       
        addObject(thePlayer, getWidth()/2, getHeight()-40);  

    }

    public Human getPlayer()
    {
        return thePlayer;
    }

    public SpaceShip getEnemy()
    {
        return theEnemy;
    } 

    public void stopped()  
    {  
        music.stop();  
    }  

    public Counter getScore()
    {
        return ScoreCounter;   
          
    }

    public void Spawn()
    {
        for(int i=0; i<100; i += 100){
            // maak een nieuw ruimteschip en sla deze tijdelijk op
            SpaceShip theSpaceShip = new SpaceShip();

            // voeg het object toe en maak gebruik van zijn afmetingen voor de positionering

            addObject(theSpaceShip, 583 + i, 100);
        }

        for(int i=0; i<1000; i += 100){
            // maak een nieuw ruimteschip en sla deze tijdelijk op
            SpaceShip2 theSpaceShip2 = new SpaceShip2();

            // voeg het object toe en maak gebruik van zijn afmetingen voor de positionering

            addObject(theSpaceShip2, 130 + i,350);
        }

        for(int i=0; i<1000; i += 100){
            // maak een nieuw ruimteschip en sla deze tijdelijk op
            SpaceShip2 theSpaceShip2 = new SpaceShip2();

            // voeg het object toe en maak gebruik van zijn afmetingen voor de positionering

            addObject(theSpaceShip2, 130 + i,250);
        }
    }
}

could u give an example, what i need to chance or add?

danpost

2014/6/30

#

Use this:

if (hitpoints <= 0 && this instanceof SpaceShip)

Svek

2014/6/30

#

and do i put this in the SpaceWorld?? or in the Enemy?

Svek

2014/6/30

#

i got it thanks you helped me alot

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How to end a game when hitpoints are 0