Unity - Water Tidal Effect

A ninja-update here with a tantalising bit of code you may or may not be interested in.

The water / tidal effect script from the previous post.

It could actually be used for anything requiring an up/down motion (....no comment) - e.g, moving platforms or such.

Enjoy, and use it in the spirit in which it was created:

using UnityEngine;
using System.Collections;

public class TidalEffect : MonoBehaviour {

    void Start () {
        initial_y = gameObject.transform.position.y;
    }

    public float upperBound;
    public float speed;

    private float initial_y;

    float current = 0.0f;
    int direction = 1;

    void Update () {

        current = Time.deltaTime * speed * direction;
        Vector3 move = gameObject.transform.position;

        move.y += current;

        if (move.y > initial_y + upperBound)
        {
            direction *= -1;
            move.y = initial_y + upperBound;
        }

        if (move.y < initial_y - upperBound)
        {
            direction *= -1;
            move.y = initial_y - upperBound;
        }
        gameObject.transform.position = move;
    }
}