# randomizeRotationDirection

> Cause some particles to spin in the opposite direction.

## Definition

* **Type:** Property
* **Namespace:** [UnityEngine](/engine/6000.5/script-reference/unityengine.md)
* **Assembly:** UnityEngine.ParticleSystemModule

> **Warning:**
>
> **Deprecated.** Please use flipRotation instead.
>
> **Upgrade to** [ParticleSystem.MainModule.flipRotation](/engine/6000.5/script-reference/unityengine/particlesystem/mainmodule/fliprotation.md)

```csharp
public float randomizeRotationDirection { get; set; }
```

### Remarks

Set between 0 and 1. Higher values cause a higher proportion of particles to spin in the opposite direction.

### Examples

```csharp
using UnityEngine;
using System.Collections;

[RequireComponent(typeof(ParticleSystem))]
public class ExampleClass : MonoBehaviour
{
    private ParticleSystem ps;
    public float hSliderValue = 0.0F;

    void Start()
    {
        ps = GetComponent<ParticleSystem>();

        var rot = ps.rotationOverLifetime;
        rot.enabled = true;
        rot.zMultiplier = 90.0f * Mathf.Deg2Rad;

        var psr = GetComponent<ParticleSystemRenderer>();
        psr.material = new Material(Shader.Find("Sprites/Default"));    // this material renders a square billboard, so we can see the rotation
    }

    void Update()
    {
        var main = ps.main;
        main.randomizeRotationDirection = hSliderValue;
    }

    void OnGUI()
    {
        hSliderValue = GUI.HorizontalSlider(new Rect(25, 25, 100, 30), hSliderValue, 0.0F, 1.0F);
    }
}
```