oscillator.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

[DisallowMultipleComponent]


public class Oscillator : MonoBehaviour
{

    [SerializeField] Vector3 movementVector = new Vector3(0f, -20f, 0f);
    [SerializeField] float period = 2f;

    [Range (0,1)] [SerializeField]
    float movementFactor; // 0 for not moved, 1 for moved completely.

    Vector3 startingPos;

    // Start is called before the first frame update
    void Start()
    {

        startingPos = transform.position;
        
    }

    // Update is called once per frame
    void Update()
    {
    
        if (period <= Mathf.Epsilon)
        {
            transform.position = startingPos;
        }
        else
        {
            Oscillate();
        }

       
    }

    private void Oscillate()
    {
        float cycles = Time.time / period;
        const float tau = Mathf.PI * 2f; // just a number, about 6.28
        float rawSinWave = Mathf.Sin(cycles * tau); // goes from -1 to +1

        movementFactor = rawSinWave / 2f + 0.5f;

        Vector3 offset = movementVector * movementFactor;
        transform.position = startingPos + offset;

    }
}