How to fix the Friction problem

Unity Engine
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1

Hi all,
I am a beginner. I want to use UNITY to simulate friction. But when the object falls on a moving object, it will stop and not move together. Refer to some articles to add physical materials to objects. But it still failed. How to make it work.

Thx!

2

The usually happens because the moving object isn’t being moved via the physics API.

For things like moving platforms, the platform should be a kinematic rigidbody, and moved through the rigidbody API, such as with methods like Rigidbody.MovePosition.

3

The moving platform is using a script to move. Also, I enabled the “Is Kinematic” and “disabled the Use Gravity”

4

But are you moving it via the rigidbody API? Can you post the component’s code?

5

Here is the code for the base

using UnityEngine;

public class BaseController : MonoBehaviour
{
    public float speed = 2f;  
    public float distance = 2f; 
    private Vector3 startPosition;


    void Start()
    {
       
        startPosition = transform.position;
    }

    void Update()
    {
      
        float xMovement = Mathf.PingPong(Time.time * speed, distance);
        transform.position = startPosition + new Vector3(xMovement, 0, 0);
    }

}
6

So you’re moving via the transform directly. This bypasses physics.

You need to move the platform via its rigidbody, as mentioned multiples times.

8

Don’t post in random threads trying to get people to help with your unrelated problem.

9

Could you please teach me more about it?

10

What kind of friction do you want to simulate? What are the details of what you want to do? Maybe I can help you after this!

11

All you need to do is set the position via the Rigidbody, and not directly:

public class MovingPlatformExample : MonoBehaviour
{
	[SerializeField]
	private RigidBody _rigidbody; // reference via inspector
	
    public float speed = 2f;  
    public float distance = 2f; 
    private Vector3 startPosition;

    void Start()
    {
        startPosition = transform.position;
    }

    void Update()
    {
        float xMovement = Mathf.PingPong(Time.time * speed, distance);
        _rigidbody.MovePosition(startPosition + new Vector3(xMovement, 0, 0));
    }
}
12

Thanks spiney199 . it is moving now.

13

Be sure to move the platform from within FixedUpdate and enable interpolation on the rigidbody.

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