transform.Translate problem

Hi!
I made this script for move a transverse piston, so I used transform.traslate, but the piston dosn't move Up and Down, but transversely.
This pic shows how the piston should move:



This is how piston moves (wrong)



This is the code:

Code (JavaScript):

1. var move : float = 0.1;
2. var translation : float;
3. function Start () {
4. }
5. function Update () {
6. if(Input.GetKey(KeyCode.A)) {
7. translation = Time.deltaTime * move;
8. transform.Translate(new Vector3(0,1,0) * translation);
9. }
10. if(Input.GetKey(KeyCode.S)) {
11. translation = Time.deltaTime * move;
12. transform.Translate(new Vector3(0,-1,0) * translation);
13. }
14. }

Thank you for your support.

 

Either use Transform.TransformDirection or Transform.up.

 

Keep Translate and use Space.World.

--Eric

 

I tried this but the piston doesn't moves like the firts image that I posted. But comes out its position.

 

Is piston model rotated? Anyway, you can always use Vector3.Lerp to interpolate between start and end position linearly.

 

Are the pivot/rotation set up correctly in the model?

 

Looking this image the pivot seems positioned right, no?

 

What does it say in top left corner of Unity. Pivot or Center and Local or Global? Set it to local and see if any of the axis is parallel to the piston.