RUMMAKER wrote...
you also don't need the if(getWorld() != null) thing in this case
KevinWelch2001 wrote ...
2013/11/16
bullet help
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Actually, that is not true; unless you put 'shotasteriod' at the end of the method (the check for 'getWorld() != null' must be placed between 'shotasteroid();' and 'if (atWorldEdge(){...}'.
ty a lot it works now
As an alternative, you could use this:
1 2 3 4 5 | shotasteroid();if (getWorld() != null && atWorldEdge()){ // code processed when at world edge} |
one more question this is my last how do I change the size of my bullet
As a third option, the class could be coded as follows:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 | import greenfoot.*;public class Bullet extends Actor{ public void act() { move(5); if ( shotasteroid() || atWorldEdge() ) { getWorld().removeObject(this); } } public boolean shotasteroid() { Asteroid asteroid = getOneObjectAtOffset(2, 2, asteroid.class); if(asteroid != null) { Greenfoot.playSound("Explosion.mp3"); getWorld().removeObject(asteroid); return true; } return false; } public boolean atWorldEdge() { if(getX() < 10 || getX() > getWorld().getWidth() - 10) return true; if(getY() < 10 || getY() > getWorld().getHeight() - 10) return true; else return false; }} |
change the image you use for the bullet. or if you mean in game then use the scale method.
GreenfootImage i = getImage().scale(width, height); (maybe its height, width ... just check the documents)
setImage(i);
If you want the bullet to start at a different size and stay that size throughout its existence, then you would add a constructor to scale its image:
where '(n/d)' is a ratio of integers, as like ('2/3', '1/2', '3/4' or whatever).
1 2 3 4 5 | public Bullet(){ GreenfootImage image = getImage(); image.scale(image.getWidth()*(n/d), image.getHeight()*(n/d));} |
ty
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