Transform position assigned does not change when object moves?

Unity Engine
1

Hello

I have a platform that moves up and down, and i store this position in my custom class to designate type of behavior to do on such a position. Like this:

void Awake(){
    foreach(Transform T in gameObject.transform){
          if(T.name == "Floor"){
            platform   = T.gameObject;
              enterPoint = new PathPoint("Wait",T.position);
              break;
           }
    }
}
void Update(){
   Debug.Log(enterPoint.position);
}

My hierarchy looks like this:

Platform¬
    Floor

Now when i am moving the parent game object (Platform) the “Floor” object also moves, but enterPoint.position never changes. I was under the impression my PathPoint would have a reference to T.position not an assignment that never changes?

My PathPoint looks like this:

public class PathPoint {
        public string type {get; private set;}
        public Vector3 position { get; private set;}

        public PathPoint (string t, Vector3 pos){
            type      = t;
            position = pos;
        }
}

So is there a way so that it will be referencing the position? I assumed it would do it by default?

2

Vector3 (position) is a struct, which is a value type. Hence you can’t use it as a reference, and it won’t update.

You’ll need to store the transform itself in order to keep track of its real time position.

1 Like
3

The problem is normally it receives a Vector3 which is not a reference to a transform position, but rather a created Vector3 some where in the world, which would mean i am a bit lost how i would structure PathPoint to accept both ?

The reason now i need a transform position is because this new path point is on an object of which is also moving… which meant i needed a slightly different approach.

4

Without any context, it’s hard to understand what is your use cases and how it would be best to structure things.
you can add a Transform as another property in your class and allow to pass null, and return either the stored vector or the current vector of a transform based on what you need, and the status of the transform property. With your current code I’d do this:

public class PathPoint
        {
            public string type { get; private set; }
            public Transform transform { get; private set; }
            private Vector3 m_position;
            public Vector3 position
            {
                get
                {
                    if (transform != null)
                        return transform.position;
                    else
                        return m_position;
                }
                private set
                {
                    m_position = value;
                }
            }


            public PathPoint(string t, Vector3 pos)
            {
                type = t;
                position = pos;
            }
            public PathPoint(string t, Transform trans)
            {
                type = t;
                transform = trans;
            }
        }
5

Ah thank you i had tried some thing like this by creating new transforms but it seems they had to be attached to game objects in order to do that! This worked perfectly!