Need help putting an object at a point based on screen coordinates

Question

I want to get a certain pixel on the screen and be a certain distance from the camera. After pressing the mouse button, I instantiate a prefab at coordinates that would be at the defined pixel and at the defined distance. Here's the code I have so far:

     var preferredPos: Vector3;
     var explosion: GameObject;
 
 function Start() {
     var newPos = Camera.main.ScreenToWorldPoint(preferredPos);
     if (Input.GetButtonDown("Fire1")){
         Instantiate(explosion, newPos, Quaternion.identity);
     }
 }

When I try doing this, it doesn't work. What is the best solution to the code to make this work?

Answer 1

Answer by syclamoth · Nov 12, 2011 at 04:10 AM

You are running this inside of Start! At the moment, you would have to press the fire button on the same frame that the game started for the explosion to instantiate. Move that code into the 'Update' function instead, so that it gets polled every frame!

 function Update()
 {
     if(Input.GetButtonDown("Fire1"))
     {
         // blah blah blah boom
     }
 }

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Mentalist4006 · Nov 13, 2011 at 02:57 AM 0

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Thank you, I did not think about that. It it now working.

Need help putting an object at a point based on screen coordinates

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