# SetBounciness(int, float)

> Set the restitution value for the specified contact point in this contact pair.

## Definition

* **Type:** Method
* **Namespace:** [UnityEngine](/engine/6000.0/script-reference/unityengine.md)
* **Assembly:** UnityEngine.PhysicsModule

```csharp
public void SetBounciness(int i, float bounciness)
```

### Parameters

**** (\[int]\(https\://learn.microsoft.com/dotnet/api/system.int32)): Index of the contact point.**** (\[float]\(https\://learn.microsoft.com/dotnet/api/system.single)): Bounciness value for the specified contact point.

### Remarks

Restitution value specifies how bouncy the surfaces at the specified contact point are.

Bounciness of 0 means absolutely not bouncy at all (all the kinetic energy is lost at contact). A value of 1 means all the kinetic energy (and then some due to computational errors) will be conserved. Because of that, normally, bounciness is somewhere in between 0 and 1.