instantiate object at mouse position

Question

Hello

Could anyone please explain me how i have to instantiate a prefab at the current mouse position? I already know how to instantiate prefabs but what i don't know is how to instantiate them at the currrent mouse position.

Thank you.

Answer 1

Best Answer

Answer by Edy · May 21, 2011 at 10:56 AM

Get the current mouse position with Input.mousePosition, then convert that position to world space using Camera.ScreenToWorldPoint.

EDIT: Example in C#:

 void Update () 
     {
     if (Input.GetButtonDown("Fire1")) 
         {
         Vector3 mousePos = Input.mousePosition;
         mousePos.z = 2.0f;       // we want 2m away from the camera position

         Vector3 objectPos = Camera.current.ScreenToWorldPoint(mousePos);
         Instantiate(yourObject, objectPos, Quaternion.identity);
         }
     }

Add comment · Show 4 · Share

BarkShark · May 21, 2011 at 11:01 AM 0

Share

How do i have to do that? I've never worked with Input.mousePosition before? Could you please explain it a little more in detail?

Edy · May 21, 2011 at 11:15 AM 0

Share

I've edited the answer to include an example code.

BarkShark · May 21, 2011 at 11:42 AM 0

Share

I have keep getting an error. I posted the error as an answer because i couldn't attach my script in a comment :D

stjernerlever · Dec 23, 2019 at 11:58 PM 1

Share

If I use the above I get an error. If I change Camera.current to Camera.main, my prefab will spawn. However, my player is a god, watching the world from above (3D game), and the prefab is spawned at the gods position. How can I get the prefab to spawn down on the ground?

Answer 2

Answer by BarkShark · May 21, 2011 at 11:41 AM

I keep getting a error when i press the mouse:

NullReferenceException UnityEngine.Camera.ScreenToWorldPoint (Vector3 position) (at C:/BuildAgent/work/6bc5f79e0a4296d6/Runtime/ExportGenerated/Editor/Graphics.cs:650)

Do you have any idea what this is?

This is my sript:

 var testObject : Transform;
 
 function Update () 
     {
     if (Input.GetButtonDown ("Fire1")) 
         {
         var mousePos = Input.mousePosition;
         mousePos.z = 2.0;       // we want 2m away from the camera position
 
         var objectPos = Camera.current.ScreenToWorldPoint(mousePos);
         
         var myObject= Instantiate(testObject, objectPos, Quaternion.identity);
         }
     }

Add comment · Show 2 · Share

Edy · May 21, 2011 at 02:27 PM 1

Share

Try using Camera.main ins$$anonymous$$d of Camera.current. If the error persists, include a reference to your main camera in the script.

leonalchemist · May 21, 2011 at 02:31 PM 0

Share

im not too great at unity but i had to do something similar for a 2D game, shouldnt u maybe create the variable objectPos as a camera object by putting var objectPos : Camera, before the Update function and set it in unity to ur main camera.

Answer 3

Answer by Maverickthebest · Jan 06, 2019 at 06:02 AM

mousePos.z = 2.0; is this not float?? i mean: mousePos.z = 2.0f;

Add comment · Show 2 · Share

Edy · Jan 06, 2019 at 11:15 AM 0

Share

The code is unityscript, not C#. Floats don't use the -f suffix here.

JackhammerGaming Edy · Apr 19, 2020 at 02:38 PM 0

Share

yes sir it does matter and it is c# and they use -f suffix

Answer 4

Answer by SystemSuitable · Apr 13, 2020 at 10:16 PM

For anyone attempting to do this in C# is quite simple & works quite fine as of 4/13/20...

 private Vector3 mousePos;
 private Vector3 objectPos;
 public GameObject yourPrefab;

 void Update ()
 {
     if(Input.GetButtonDown("Fire1"))
     {
         mousePos = Input.mousePosition;
         mousePos.z = 2.0f;
         objectPos = Camera.main.ScreenToWorldPoint(mousePos);
         Instantiate(yourPrefab, objectPos, Quaternion.identity);
     }
 }

}

Add comment · Show 1 · Share

unity_lIp-DTlGzNpjJA · Apr 19, 2020 at 02:04 PM 0

Share

i have something simmilar but i cant get it to appear on the game screen only on the scene screen can you help me

instantiate object at mouse position

4 Replies

Your answer

Follow this Question

Related Questions