# x

> The curve that defines particle forces in the x-axis.

## Definition

* **Type:** Property
* **Namespace:** [UnityEngine](/engine/6000.3/script-reference/unityengine.md)
* **Assembly:** UnityEngine.ParticleSystemModule

```csharp
public ParticleSystem.MinMaxCurve x { get; set; }
```

### Remarks

Additional Resources: [ParticleSystem.MinMaxCurve](/engine/6000.3/script-reference/unityengine/particlesystem/minmaxcurve.md).

### Examples

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

[RequireComponent(typeof(ParticleSystem))]
public class ExampleClass : MonoBehaviour
{
    private ParticleSystem ps;
    public bool moduleEnabled = true;
    public float hSliderValue = 10.0f;

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

    void Update()
    {
        var forceOverLifetime = ps.forceOverLifetime;
        forceOverLifetime.enabled = moduleEnabled;
        forceOverLifetime.x = hSliderValue;
    }

    void OnGUI()
    {
        moduleEnabled = GUI.Toggle(new Rect(25, 45, 100, 30), moduleEnabled, "Enabled");
        hSliderValue = GUI.HorizontalSlider(new Rect(25, 85, 100, 30), hSliderValue, -50.0f, 50.0f);
    }
}
```