Selecting specific objects

Unity Engine
1

I have a script that allows me to move objects in my FPS game with my mouse but I want it to only apply to objects that are in a specific layer so that I dont effect every object, but only ones that are in a specific layer. Can anyone help me add something to my script. I have tried different methods and nothing seems to work as I just have no clue where to add to the script, please can you just add it into my script as others have just given me links to other questions but none of which seem to work. Please can anyone help me?

var grabbed : Transform;

var grabDistance : float = 10.0f;

var useToggleDrag : boolean; // Didn’t know which style you prefer.

function Update () {

if (useToggleDrag)

UpdateToggleDrag();

else

UpdateHoldDrag();

}

// Toggles drag with mouse click

function UpdateToggleDrag () {

if (Input.GetMouseButtonDown(0))

Grab();

else if (grabbed)

Drag();

}

// Drags when user holds down button

function UpdateHoldDrag () {

if (Input.GetMouseButton(0))

if (grabbed)

Drag();

else

Grab();

else

grabbed = null;

}

function Grab() {

if (grabbed)

grabbed = null;

else {

var hit : RaycastHit;

var ray : Ray = Camera.main.ScreenPointToRay(Input.mousePosition);

if (Physics.Raycast(ray, hit))

grabbed = hit.transform;

}

}

function Drag() {

var ray : Ray = Camera.main.ScreenPointToRay(Input.mousePosition);

var position : Vector3 = transform.position + transform.forward * grabDistance;

var plane : Plane = new Plane(-transform.forward, position);

var distance : float;

if (plane.Raycast(ray, distance)) {

grabbed.position = ray.origin + ray.direction * distance;

grabbed.rotation = transform.rotation;

}

}

2

Physics.Raycast lets you include a LayerMask to say which layers you want to check. So change that line in your Grab() function to something like this:

if (Physics.Raycast(ray, hit, 100,
    1 << LayerMask.NameToLayer("Zombies") |
    1 << LayerMask.NameToLayer("Ninjas") |
    1 << LayerMask.NameToLayer("Kittens")))

But using the names of the layers you actually want, of course. :wink: