Why is my script only running when object has been selected beforehand?

Question

This piece of Javascript is giving me troubles.

 var originalPosition : Vector3;
 var osHeight = 0.05;
 var delay = 0;
 
 function Start () {
     // when the object starts, we record its initial position
     originalPosition = transform.position;
 }
 
 function Update () {
     // Set the x position to loop between values osHeight and a set delay.
     transform.position.y = originalPosition.y + Mathf.Sin(Time.time + delay) * osHeight;
     Debug.Log("YPosition = " + transform.position.y);
 }

All seems fine but only runs on play when the object is selected like this:

alt text

Otherwise it doesn't run.

I've tried the debugger and I've noticed that the y position does oscilate. However the value on the object and of YPosition is different.

alt text

Why is this happening and how do I fix this?

Sorry if it's a really simple question. I've tried googling answers but can't seem to fix it.

Answer 1

Answer by hexagonius · Jan 03, 2017 at 08:40 PM

you can't change transform.position.y directly. you need to save the current position as Vector3, alter y and write it back to position.

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Why is my script only running when object has been selected beforehand?

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