Question by monkeroks · Apr 12, 2015 at 09:38 PM · move

I can get the train to move but is is all jumpy and not smooth, plus i want it to continue moving if i hold down the button, how do i do that?

i know im a novice but i finally got something to work and its not working the way i want it to. here is the code

using UnityEngine; using System.Collections;

public class train : MonoBehaviour { public float moveSpeed = 200; public float move; public Vector3 speed; // Use this for initialization void Start () {

 }
 // Update is called once per frame
 void Update () {
 if (Input.GetKeyDown(KeyCode.W))
     {
         transform.Translate(-3,0,0);
     }
     if (Input.GetKeyDown (KeyCode.S)) 
     {
         transform.Translate(3,0,0);
     }

 }}

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Guppie1337 · Apr 12, 2015 at 10:04 PM 0

The main reason it's probably jumpy is because you're using transform.Translate. The best way to think of that function for someone new is like teleportation. Your game object is literally changing it's transform by -3 on the x axis every time that line goes through. You're also using Input.Get$$anonymous$$eyDown which is a bool that returns true every frame it is identified as being pressed down. You should use Input.Get$$anonymous$$ey because this returns true WHILE the key is pressed ins$$anonymous$$d.

There are many ways you can go about moving your object smoothly with the use of the physics engine. A typical one is by adding a rigidbody to your game object and using rigidbody.velocity (GetComponent().velocity).

For movement and such, you should also place your code in FixedUpdate() rather than Update(). You can see the differences between them explained [here][1] thoroughly.

These are really common questions and you should probably do some more research on the forums, answers, and most definitely consult the scripting API.

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I can get the train to move but is is all jumpy and not smooth, plus i want it to continue moving if i hold down the button, how do i do that?

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