im making a scenario, and the head of a turrret points towards the mouse but for some reason there are two turret heads take a look:
http://www.greenfoot.org/scenarios/6071
and im not sure why please help thanks
-nic- wrote ...
2012/10/7
weird duplication?
not sure but I think that every act cycle you add a turret
remove the act method of the world and make this to your button class:
import greenfoot.*;
public class Button extends Actor
{
public void act()
{
if(Greenfoot.mouseClicked(this))
{
getWorld().removeObject(this);
this.setBackground("corkboard.jpg");
Bar b = new Bar();
addObject(b,400,10);
Turretbase turretbase = new Turretbase();
addObject(turretbase, 67, 556);
TurretTop turretTop = new TurretTop();
addObject(turretTop, 67, 530);
}
}
}forgot that this is not the world, make a reference to the world everytime you call world methods like this:
import greenfoot.*;
public class Button extends Actor
{
public void act()
{
if(Greenfoot.mouseClicked(this))
{
getWorld().setBackground("corkboard.jpg");
Bar b = new Bar();
getWorld().addObject(b,400,10);
Turretbase turretbase = new Turretbase();
getWorld().addObject(turretbase, 67, 556);
TurretTop turretTop = new TurretTop();
getWorld().addObject(turretTop, 67, 530);
getWorld().removeObject(this);
}
}
}
dont worry i did it and added the referances
and the getWorld().removeObject(this);
had to go last in the statement or it throws a nullPointerExeption
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