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Question by chanuka4 · Jan 04, 2021 at 09:32 AM · physics

Object started tumbling,

Hello, I'm just learning Unity, I created a player object which is traveling/sliding on a level ground, ground has 0 friction, it worked perfectly, now I added some obstacles and stuff on the ground, and the player started to tumble all of a sudden, I didn't change anything in code regarding to player movement, I can't find anything that might be the problem.

Here is the player movement code:

using UnityEngine;

public class PlayerMovement : MonoBehaviour

{

 public Rigidbody rb;

 public float forwardForce = 2000f;
 public float sidewaysForce = 500f;
 public float upwardForce = 50f;

 // Update is called once per frame
 void FixedUpdate()
 {
     rb.AddForce(0, 0, forwardForce * Time.deltaTime);

     if (Input.GetKey("d") )
     {
         rb.AddForce(sidewaysForce * Time.deltaTime, 0, 0, ForceMode.VelocityChange);
     }

     if (Input.GetKey("a") )
     {
         rb.AddForce(-sidewaysForce * Time.deltaTime, 0, 0, ForceMode.VelocityChange);
     }

     if (Input.GetKey(KeyCode.Space))
     {
         rb.AddForce(0, upwardForce * Time.deltaTime, 0);
     }
 }

}

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Answer by GingerBreadGames · Jan 04, 2021 at 04:57 PM

You could freeze the x y or z rotation if it is a rigidbody. These will be at Rigidbody>Constraints in your inspector tab. If you do want the object to be able to tumble at a different point, you can do this in the code by doing:

Rigidbody.constraints = RigidbodyConstraints.FreezeRotation; (Freeze)

Rigidbody.constraints = RigidbodyConstraints.None; (Unfreeze)

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avatar image GingerBreadGames · Jan 04, 2021 at 04:58 PM 0
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Obviously you don't include the (Freeze) and (Unfreeze) at the end

avatar image GingerBreadGames · Jan 04, 2021 at 05:01 PM 0
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Oh and I would also do:

public Rigidbody rb;

and then replace the just the first parts that say Rigidbody in the last 2 with rb. From then on you can just reference your rigidbody with rb.

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Answer by chanuka4 · Jan 05, 2021 at 06:56 AM

Thank you, but I just booted up the project and the player object is not tumbling any more. WTH?

Thanks for the answer anyway.

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