Spawn single floor tile at mouse position

Questions & Answers
1

Hello, I am trying to build an RCT, Prisonarchitect or Sim like game in Unity2D.

The idea is that I press a UI button, get a tile that follows the mouse and by pressing the mouse button a clone of that tile spawns at the mouse(x;y) location.

This should not be a problem since this is pretty much basic.

But When I try to place a single tile I get a ton of tiles in the same place. Somehow I need way to scan for an already existing tile (or other game_object) that is already placed at that location.

I have tried it with “Tags” but I could not get to work. My script so far is also for unity3D I have tried to modify it so that it don’t need the Vector3 component but it did not work either.

I have no idea. I am desperate right now. The solution can’t be that difficult but I am not able to see it.

-Thanks

var depth = 10.0;

var FloorPrefab : Transform; 
               

function Update () 
{
	//Follow mouse
	var mousePos = Input.mousePosition;
	var wantedPos = Camera.main.ScreenToWorldPoint (Vector3 (mousePos.x, mousePos.y, depth));
	transform.position = wantedPos;

	{
		//Spawn object at mouse position
		var mousex = Input.mousePosition.x;
		var mousey = Input.mousePosition.y;

		var ray = camera.main.ScreenPointToRay (Vector3(mousex,mousey,0));

		var hit : RaycastHit;

	}
		if ( Input.GetMouseButtonDown(1) )
	{
		Destroy(gameObject);
	}
   		if (Physics.Raycast (ray, hit, 200)) 
   		{
			if ( Input.GetMouseButtonUp(0) )
			{
			var create = Instantiate(FloorPrefab, hit.point, Quaternion.identity);
			} 
		}
	}
2

Thank you!

I have done it with tags on colliders

Works like a Dream!

function Update () 
}
   		if (Physics.Raycast (ray, hit) && hit.collider.gameObject.CompareTag("Ground")) 
		{
			if ( Input.GetMouseButtonDown(0) )
			{
			var create = Instantiate(FloorPrefab, hit.point, Quaternion.identity);
			} 
		}
}