Making Objects Float Up & Down in Unity

README.md

From http://www.donovankeith.com/2016/05/making-objects-float-up-down-in-unity/

Making Objects Float Up & Down in Unity

by admin · May 6, 2016 Ever wanted to make an object float up and down while spinning in Unity? Well, I’ve written a script for that.

End Result of Script

Usage

1. Select an object in your Unity project.
2. Add Component > New Script

• Name: Floater
• Language: C-Sharp

3. Edit the script
4. Copy & Paste the code below into your script editor.
5. Save the script.
6. Tweak settings to your heart’s content

Floater.cs

// Floater v0.0.2
// by Donovan Keith
//
// [MIT License](https://opensource.org/licenses/MIT)
 
using UnityEngine;
using System.Collections;
 
// Makes objects float up & down while gently spinning.
public class Floater : MonoBehaviour {
    // User Inputs
    public float degreesPerSecond = 15.0f;
    public float amplitude = 0.5f;
    public float frequency = 1f;
 
    // Position Storage Variables
    Vector3 posOffset = new Vector3 ();
    Vector3 tempPos = new Vector3 ();
 
    // Use this for initialization
    void Start () {
        // Store the starting position & rotation of the object
        posOffset = transform.position;
    }
     
    // Update is called once per frame
    void Update () {
        // Spin object around Y-Axis
        transform.Rotate(new Vector3(0f, Time.deltaTime * degreesPerSecond, 0f), Space.World);
 
        // Float up/down with a Sin()
        tempPos = posOffset;
        tempPos.y += Mathf.Sin (Time.fixedTime * Mathf.PI * frequency) * amplitude;
 
        transform.position = tempPos;
    }
}