How to click a 3d object in unity3d?

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Hi can anyone point me to or tell me what code to use if say I have a cube in my scene and i want it to run an animation when i click it? I know how to do this with gui but not with a actual 3d object in unity like a plane or something? Thanks (:

Answer 1

Best Answer

Answer by Huacanacha · Nov 05, 2013 at 04:37 AM

You raycast from the click position (mouse or touch etc), then if you hit an object you want to interact with run whatever code you need.

For starters look at: http://docs.unity3d.com/Documentation/ScriptReference/Input-mousePosition.html http://docs.unity3d.com/Documentation/ScriptReference/Physics.Raycast.html

You can use a layer mask for Physics.Raycast so you only check the objects you are interested in, or you could use RaycastAll etc.

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Answer 2

Answer by clunk47 · Nov 05, 2013 at 04:41 AM

You could use OnMouseDown, or Raycast to do this, be sure to have a collider of some type on the object for either.

OnMouseDown example in C#

Attach this to the object you want detected:

 using UnityEngine;
 using System.Collections;
 
 public class OnMouseDownExample : MonoBehaviour 
 {
     void OnMouseDown()
     {
         print (name);    
     }
 }

Raycast example in C#

attach this to any object. Just to make sense, attach to the main camera or an empty.

 using UnityEngine;
 using System.Collections;
 
 public class RaycastExample : MonoBehaviour 
 {
     Ray ray;
     RaycastHit hit;
     
     void Update()
     {
         ray = Camera.main.ScreenPointToRay(Input.mousePosition);
         if(Physics.Raycast(ray, out hit))
         {
             if(Input.GetMouseButtonDown(0))
                 print(hit.collider.name);
         }
     }
 }

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Jammer3000 · Nov 13, 2013 at 05:31 PM 0

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Thanks it works but is there away i could make it so it only works if the object I'm clicking on has a certain tag and I'm using the raycast way but in javaScript???

clunk47 · Nov 13, 2013 at 08:54 PM 0

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Very simple.

 #pragma strict
 
 var ray : Ray;
 var hit : RaycastHit;
 
 function Update () 
 {
     ray = Camera.main.ScreenPointToRay(Input.mousePosition);
     if(Physics.Raycast(ray, hit))
     {
         if(hit.collider.tag == "Enemy")
             print(hit.collider.name);
     }
 }

Jammer3000 · Nov 13, 2013 at 09:39 PM 0

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Thanks quick question what are var ray : Ray; var hit : RaycastHit; for?

clunk47 · Nov 13, 2013 at 09:54 PM 0

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Look it up in Unity Script Reference man. Ray is a RAY casting from your Mouse Position from the Main camera in this case. RaycastHit is what the endpoint of the ray is HITTING. Links provided below for more information on Unity Script Reference.

RaycastHit

Ray

clunk47 · Nov 14, 2013 at 07:43 PM 0

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If something answers your question, please accept and vote up. If you have more questions, please ask them as separate questions.

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Answer 3

Answer by Eric5h5 · Nov 05, 2013 at 04:41 AM

Use the OnMouseDown function in a script, and attach the script to the object.

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Jammer3000 · Nov 05, 2013 at 05:02 AM 0

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Attach it to which object? The one I'm clicking or an empty one with a variable that I can assign what object I want to be affected when clicked??

Eric5h5 · Nov 05, 2013 at 05:06 AM 0

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To the object you're talking about in your question.

How to click a 3d object in unity3d?

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