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qwertyuiop
qwertyuiop wrote ...

2014/4/2

How to click on an actor and remove it from the world

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qwertyuiop qwertyuiop

2014/4/2

#
Basically when my mouse is over an image of a target I want to be able to click and remove the target. Any help would be appreciated, thanks.
danpost danpost

2014/4/2

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What are your thoughts as far as what methods you might need and where you would need to put the code?
qwertyuiop qwertyuiop

2014/4/2

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Well I have tried to use an if statement saying that if the mouse and target collide and the left mouse button is pressed it should remove the object however I don't think I did that right either.
danpost danpost

2014/4/2

#
qwertyuiop wrote...
Well I have tried to use an if statement saying that if the mouse and target collide and the left mouse button is pressed it should remove the object however I don't think I did that right either.
Where did you try it? What 'it' should remove the object? What exactly do you mean by 'mouse and target collide'?
trias95 trias95

2014/4/2

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If you are just wanting to remove it from the world you could use the following code 
 if (Greenfoot.mouseClicked(this)) {
        World world;
        world = getWorld();
        world.removeObject(this);
        return;      
    }
That code could go inside your act method inside the "target"'s code. or if you would like to do it neater, you can set your target's code out like so.
public void act() 
    {
        removeOnClick();
}
public void removeOnClick()
{
 if (Greenfoot.mouseClicked(this)) {
        World world;
        world = getWorld();
        world.removeObject(this);
        return;
    }    
}
qwertyuiop qwertyuiop

2014/4/2

#
I added that to my target code and nothing happens when I click on them. Any ideas why?
qwertyuiop qwertyuiop

2014/4/2

#
I changed: 
if (Greenfoot.mouseClicked(this))
to... 
if (Greenfoot.mouseClicked(null))
and it works but I have 10 objects on the screen and I only want to remove the one I am hovering over.
danpost danpost

2014/4/2

#
If you have an actor that follows the mouse, then clicks will not be registered on your targets (only on that actor that follows the mouse).
qwertyuiop qwertyuiop

2014/4/2

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So is there anyway to remove the target object when the mouse is firstly hovering over a target object and when it is clicked from the actor that follows the mouse (which is called "Aim")?
danpost danpost

2014/4/2

#
How about trying: 
if (Greenfoot.mouseClicked(null) && !getIntersectingObjects(Aim.class).isEmpty()) ...
or if you need a smaller hit area:
qwertyuiop qwertyuiop

2014/4/2

#
That works, but I can hit some targets from outside the actual area of the object itself.
danpost danpost

2014/4/2

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danpost wrote...
How about trying: 
if (Greenfoot.mouseClicked(null) && !getIntersectingObjects(Aim.class).isEmpty()) ...
or if you need a smaller hit area: 
if (Greenfoot.mouseClicked(null) && !getObjectsAtOffset(0, 0, Aim.class).isEmpty()) ...
Sorry, the second code part did not show on my last post.
qwertyuiop qwertyuiop

2014/4/2

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Ahhh thought so, no problem I will try it now thanks.
qwertyuiop qwertyuiop

2014/4/2

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This works just fine. Thanks for your time.
danpost danpost

2014/4/2

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You may need to adjust the image of your Aim object when over a target (make it smaller -- or just an invisible point); or you could prevent the Aim object from moving over a target (put a condition on following the mouse) so the click will register on the target itself. EDIT: ignore this if you are satisfied with what you have.
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