How do I pass a reference?

Question

If I'm accessing a GameObject via its Transform component, can I pass a reference to that component to a function and have the function access that GameObject?

Here's my script:

if (mapData.ContainsKey(xpos)) {
    neighbors[0] = (Transform)mapData[xpos];
}

Where neighbors[] is an array of Transforms. I'm trying to get transforms from the above hash into an array.

I'm trying to create a voxel terrain of cubes that each know what their neighbors are. Each cube originally knew its neighbors through raycasting, but that was to slow. So I tried another technique. When I generated the terrain, I created a hash of all the transforms, and gave that hash to each cube.

My function runs through the hash to see if it has anything near it in the "X Positive", that is, to the right, and if there is, sets neighbors[0] to equal the transform of that gameObject. It's obviously not working at the moment, but I have no idea why.

Answer 1

Answer by Jessy · Jan 25, 2011 at 05:30 PM

Yes. Transform is a class. You'd just do

thatTransform.gameObject

http://unity3d.com/support/documentation/ScriptReference/Component-gameObject.html

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e-bonneville · Jan 25, 2011 at 06:10 PM 0

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Hmm... So I'm trying to store a reference to a gameObject in a hash and then reference it like so: mapData[xneg].gameObject But it still won't work. What am I doing wrong?

DaveA · Jan 25, 2011 at 06:16 PM 0

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can you post code?

Jessy · Jan 25, 2011 at 06:24 PM 0

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Why did you say you're storing a Transform then? Yes, please post code; I no longer have any idea what you're saying. And apparently the thing that is said above is not the thing that you think it is, to me. ;-)

e-bonneville · Jan 25, 2011 at 06:37 PM 0

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You're quite right, I was being very... special. $$anonymous$$y apologies, I'll post code. :)

DaveA · Jan 25, 2011 at 09:03 PM 0

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What about where you stuff the values into the table?

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Answer 2

Answer by DaveA · Jan 25, 2011 at 06:19 PM

If you are assigning mapDatg[xneg] = aTransform; it should work, because you access mapData[xneg] as a transform, so that with .gameObject should pull that out. If, on the other hand, you are assiging mapData[xneg] = aGameObject, then there is no GameObject.gameObject. Some code to look at might help.

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e-bonneville · Jan 25, 2011 at 06:37 PM 0

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Ah. Hmm, let me try that.

e-bonneville · Jan 25, 2011 at 07:03 PM 0

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Wait, don't you mean aTransform = mapData[xneg]?

DaveA · Jan 25, 2011 at 09:04 PM 0

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I mean where you stuff the values into the table, what are you storing? Because if it's a Transform, it should work. If it's a GameObject, it won't. FWIW I've used Hashtables in this way with no problem, so I know we can get you fixed up.

e-bonneville · Jan 25, 2011 at 09:58 PM 0

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Ah, I see. Yeah, I'm storing transforms in there, that part is working fine.

Cool!

How do I pass a reference?

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