Vibrate an object along particular local axis

ObjectVibration.cs

using UnityEngine;

public class ObjectVibration : MonoBehaviour
{
    public enum VibrationAxis
    {
        X,
        Y,
        Z
    }

    [Header("Vibration Settings")]
    public VibrationAxis selectedAxis = VibrationAxis.Y; // Select axis to vibrate along
    public float amplitude = 0.1f; // Maximum displacement from the original position
    public float frequency = 10f; // Oscillation speed

    private Vector3 initialLocalPosition;
    private float elapsedTime;

    void Start()
    {
        // Store the initial local position
        initialLocalPosition = transform.localPosition;
    }

    void Update()
    {
        // Increase time counter
        elapsedTime += Time.deltaTime * frequency;

        // Calculate vibration offset using sine wave
        float vibrationOffset = Mathf.Sin(elapsedTime) * amplitude;

        // Determine vibration direction in local space
        Vector3 vibrationDirection = Vector3.zero;
        switch (selectedAxis)
        {
            case VibrationAxis.X:
                vibrationDirection = transform.right;
                break;
            case VibrationAxis.Y:
                vibrationDirection = transform.up;
                break;
            case VibrationAxis.Z:
                vibrationDirection = transform.forward;
                break;
        }

        // Apply vibration along the selected local axis
        transform.localPosition = initialLocalPosition + vibrationDirection * vibrationOffset;
    }
}