local gravity

LocalGravity.cs

using UnityEngine;

public class LocalGravity : MonoBehaviour
{
    public Transform m_GravityCenter;

    private Rigidbody m_RigidBody;
    
    void Start()
    {
        m_RigidBody = GetComponent<Rigidbody>();
        m_RigidBody.useGravity = false;
    }
    
    void FixedUpdate()
    {
        Vector3 gravityCenter = m_GravityCenter.position;

        Vector3 gravityDir = gravityCenter - transform.position;
        gravityDir.Normalize();

        m_RigidBody.AddForce(Physics.gravity.magnitude * gravityDir, ForceMode.Acceleration);
    }
}