crosshair moves away

Questions & Answers
1

i am trying to handle with a crosshair, currently as a 3DText
one of my problems are the increasing distance by moving it.
An other, the placement on the correct position

//				##Controling guns##

//Requirements
var cross:Transform;

//placement
private var crossDistance = 10;
private var crossHeigh = 10;
private var crossPosition:Vector3;
//movingSpeed
private var sensitivity = 5;

function Start () {
	Screen.showCursor = false;
	//place cross 
	cross.position = transform.position;
	cross.Translate(transform.position.x,crossDistance,crossHeigh);
	crossPosition = cross.position;
}

//control cross with mouse
function Update () {
	cross.Translate(Input.GetAxis("Mouse X") * sensitivity*-1,Input.GetAxis("Mouse Y") * sensitivity,0);
	cross.LookAt(transform);
}
3

You should not move the GUIText’s transform position, you should only affect the GUIText’s pixeloffset in order to moving your cross hair in the screen.

Example Script C#

using UnityEngine;
using System.Collections;

public class TestCursor : MonoBehaviour {
	
	private Vector2 half, pos;
	
	void Start () {
		Screen.showCursor = false;
		guiText.anchor = TextAnchor.MiddleCenter;
		half = new Vector2( Screen.width/2, Screen.height/2 );
		pos = Vector2.zero;
	}
	
	void Update () {
		pos.x = Input.mousePosition.x - half.x;
		pos.y = Input.mousePosition.y - half.y;
		guiText.pixelOffset = pos;
	}
}

If you work with GUITexture, you need to do a few more calculations to include the offset of the image itself, this is because GUITexture uses PixelInset in oppose to the PixelOffset used by the GUIText

2

why are you using 3d text instead 2d texture?

2d texture is the easiest way to achieve a crosshair
just draw the texture with OnGUI function