Question by aeffoa · Apr 19 at 10:36 PM · pivot inertia

How to imitate inertia without a Rigidbody or how to disable Boxcollider's physics?

Aim is to rotate an Object around a pivot point on player's input, rotation should have some kind of inertia.

Problem: when setting Box collider, RigidBody.AddTorque rotation method changes the center of rotation from pivot to Box collider's center of mass (i think). Setting centerOfMass manually in script didn't help.

Transform.RotateAround works perfectly fine with Box collider, but i couldn't find a way to imitate inertia w/o GameObject interacting with physics (Rigidbody+apply physical impact).

Code:

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class PlayerController : MonoBehaviour
 {
     private GameObject player;
     private Rigidbody playerRb;
     [SerializeField] private float turnSpeed;
     public Transform customPivot;
 
     
     void Start()
     {
         player = GetComponent<GameObject>();
         playerRb = GetComponent<Rigidbody>();     
     }
         
     void Update()
     {
         float leftRightInput = Input.GetAxis("Horizontal");
         //Works with BoxCollider but no physics applied
         transform.RotateAround(customPivot.position, Vector3.forward, turnSpeed * leftRightInput);
         //Physics applied but BoxCollider ruins rotation around pivot
         playerRb.AddTorque(new Vector3(0, 0, turnSpeed) * leftRightInput, ForceMode.Acceleration);            
     }
 }

Is there a way to disable Box collider's physics (why does it even affect game object's physics?) or is there a way to apply inertia while using transform.Rotate (w/o Rigidbody)?

Looking forward to get any information on the topic, it's been a while since i've been trying to solve this puzzle.

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