Greenfoot

davemib123

2012/8/12

#

Hi guys, i'm trying to accomplish the following: Hero get hit with missile Hero turn + 5 Hero turn - 10 Hero return back to normal position Any ideas on how this would be implemented?

SPower

2012/8/12

#

The last 2nd and 3rd are simple:

// in the Hero class, to turn 5 degrees
turn(5);
// in the Hero class, to turn 10 degrees to the left
turn(-10);

but I've got some questions about the 1st and the last one: - What should be implemented about getting hit with a Missle? The dying system, or something else? - What was the original position? If you don't know that, you'll never get back to it :)

davemib123

2012/8/12

#

This is within the missile code:

public void checkHeroCollision(){
        Actor collided = getOneIntersectingObject(Hero.class);
        if (collided != null){
            getWorld().addObject(new explosionSmall(), getX(), getY());
            getWorld().removeObject(this);
            collided.turn(-10);
            return;
        } else {
            if (getX() <= - outOfBoundary) {
                getWorld().removeObject(this);
            } 
        }
    }

This is what it is doing right now: http://www.greenfoot.org/scenarios/5799

SPower

2012/8/12

#

In the Hero class:

public void applyDamage(Missile missile)
{
    // something like life -= missile.getDamage();
}

In the Missile class:

public int getDamage()
{
    // return something
}

change this to the code you gave:

public void checkHeroCollision() {  
        Hero collided = (Hero) getOneIntersectingObject(Hero.class);
        if (collided != null){
            collided.applyDamage(this);
            // the rest

davemib123

2012/8/12

#

not getting much luck with this, I get this error in the compiler:

cannot find symbol - method shake (Missiles)

SPower

2012/8/12

#

where are you using the method 'shake'?

davemib123

2012/8/12

#

in the enemy missile class. I was thinking of attempting it possibly this way. I have the bullet impact with the Hero and this sets the Hero to rotate -25 Now the question is for the Hero how would I set this back to 0 if the rotation has gone to -25. I tried this in the hero but didnt work:

public void shake(){
        if (getRotation(this) >= -25){
            setRotation(0);
        }
}

SPower

2012/8/12

#

this should work:

public void shake()
{
     if (getRotation()>= -25) {
            setRotation(0);
     }
}

the getRotation takes no arguments. A little advice, I see you making the 2 methods you gave me public, but if you don't need to call that method from some other object, it can be private.

SPower

2012/8/12

#

Also another question: at which line is the error?

davemib123

2012/8/12

#

OK no error now, but it moves back to normal far too quick any way of slowing down. I used the word "this" in getRotation which generated the error.

SPower

2012/8/12

#

You want to build in a delay. This is a simple way:

private int turnDelay = 0;

in your act:

turnDelay++;

change schake:

public void shake()  
{
     // 20 can be changed later on, I don't know what will work
     if (getRotation()>= -25 && turnDelay >= 20) {  
           setRotation(0);
     }  
}

this is one way, but the other way is easier: don't turn 25 degrees immediately, turn 2 or something like that.

davemib123

2012/8/12

#

could you expand on the second option?

SPower

2012/8/12

#

Instead of something like this:

turn(-25);

do this a few times (in act):

turn(-1);

do you understand?

davemib123

2012/8/12

#

thanks for the tips SPower. But it is not working as I want it to .... will come back to this at a later date :)

davemib123

2012/8/12

#

tried something different - what do you think? It's not smooth but it does shake ....

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