# SetMode(ParticleSystemCustomData, ParticleSystemCustomDataMode)

> Choose the type of custom data to generate for the chosen data stream.

## Definition

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

```csharp
public void SetMode(ParticleSystemCustomData stream, ParticleSystemCustomDataMode mode)
```

### Parameters

**** (\[ParticleSystemCustomData]\(/engine/6000.5/script-reference/unityengine/particlesystemcustomdata)): The name of the custom data stream to enable data generation on.**** (\[ParticleSystemCustomDataMode]\(/engine/6000.5/script-reference/unityengine/particlesystemcustomdatamode)): The type of data to generate.

### Remarks

Additional Resources: [ParticleSystem.CustomDataModule.GetMode](/engine/6000.5/script-reference/unityengine/particlesystem/customdatamodule/getmode.md), [ParticleSystem.GetCustomParticleData](/engine/6000.5/script-reference/unityengine/particlesystem/getcustomparticledata.md).

### Examples

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

[RequireComponent(typeof(ParticleSystem))]
public class ExampleClass : MonoBehaviour
{
    void Start()
    {
        ParticleSystem ps = GetComponent<ParticleSystem>();
        var customData = ps.customData;
        customData.enabled = true;

        Gradient grad = new Gradient();
        grad.SetKeys(new GradientColorKey[] { new GradientColorKey(Color.blue, 0.0f), new GradientColorKey(Color.red, 1.0f) }, new GradientAlphaKey[] { new GradientAlphaKey(1.0f, 0.0f), new GradientAlphaKey(0.0f, 1.0f) });

        customData.SetMode(ParticleSystemCustomData.Custom1, ParticleSystemCustomDataMode.Color);
        customData.SetColor(ParticleSystemCustomData.Custom1, grad);

        AnimationCurve curve = new AnimationCurve();
        curve.AddKey(0.0f, 0.0f);
        curve.AddKey(1.0f, 1.0f);

        customData.SetMode(ParticleSystemCustomData.Custom2, ParticleSystemCustomDataMode.Vector);
        customData.SetVectorComponentCount(ParticleSystemCustomData.Custom2, 1);
        customData.SetVector(ParticleSystemCustomData.Custom2, 0, new ParticleSystem.MinMaxCurve(1.0f, curve));
    }
}
```