How to touch select 3D objects

Question

New to Unity and Scripting... I would like a simple example of selecting a 3D object by touc$$anonymous$$ng the screen. I am either terrible at searc$$anonymous$$ng or there aren't many simple examples out there (probably the former).

I am guessing that you need to make a raycast to detect the object but I'm not sure how to do t$$anonymous$$s.

Once the object is selected I would like to drag it, but that's a separate question.

Answer 1

Answer by gfr · Oct 24, 2011 at 06:45 PM

Yes, that's what raycasting is used for:

 var ray : Ray = Camera.main.ScreenPointToRay(touch.position);
 var $$anonymous$$t : RaycastHit;
 if (Physics.Raycast(ray, $$anonymous$$t, 100)) {
     selectedObject = $$anonymous$$t.transform;
 }

Once you have remembered the object you can also it's transforms position when it's dragged.

If you don't want to have all objects selectable, you will want to check the objects properties to see wether it's selectable or use layer masks to limit the raycasting.

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Answer 2

Answer by DaveA · Oct 24, 2011 at 08:30 PM

Make sure each object (or sub object) has some sort of Collider on it. Then you can implement an OnMouseDown handler in a script w$$anonymous$$ch you attach to that (those) object(s).

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schwertfisch · Jul 30, 2014 at 12:37 PM 0

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that was going to be my next question!

How to touch select 3D objects

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