# Expand

> Expand the bounds by: size + ( amount * 2) along each side.

## Definition

* **Type:** Method
* **Namespace:** [UnityEngine](/engine/6000.7/script-reference/unityengine.md)
* **Assembly:** UnityEngine.CoreModule

## Expand(float)

Expand the bounds by: `size` + (`amount` \* 2) along each side.

```csharp
public void Expand(float amount)
```

### Parameters

**** (\[float]\(https\://learn.microsoft.com/dotnet/api/system.single)): 

### Remarks

Expands the bounds symmetrically by extending each side by the given amount, resulting in a total size increase of (amount × 2) per axis.

### Examples

```csharp
using UnityEngine;

public class BoundsExpandExample : MonoBehaviour
{
    public Vector3 boundsSize = new Vector3(1, 1, 1);
    public float expandAmount = 1f;

    private Bounds bounds;

    void Start()
    {
        // Initialize bounds at the object's position
        bounds = new Bounds(transform.position, boundsSize);

        // Expand the bounds by a scalar (applied uniformly in all directions)
        bounds.Expand(expandAmount);
    }

    void Update()
    {
        DrawBounds(bounds, Color.yellow);
    }

    void DrawBounds(Bounds b, Color color)
    {
        Vector3 min = b.min;
        Vector3 max = b.max;

        Vector3[] corners = new Vector3[8];
        corners[0] = new Vector3(min.x, min.y, min.z);
        corners[1] = new Vector3(max.x, min.y, min.z);
        corners[2] = new Vector3(max.x, min.y, max.z);
        corners[3] = new Vector3(min.x, min.y, max.z);
        corners[4] = new Vector3(min.x, max.y, min.z);
        corners[5] = new Vector3(max.x, max.y, min.z);
        corners[6] = new Vector3(max.x, max.y, max.z);
        corners[7] = new Vector3(min.x, max.y, max.z);

        Debug.DrawLine(corners[0], corners[1], color);
        Debug.DrawLine(corners[1], corners[2], color);
        Debug.DrawLine(corners[2], corners[3], color);
        Debug.DrawLine(corners[3], corners[0], color);

        Debug.DrawLine(corners[4], corners[5], color);
        Debug.DrawLine(corners[5], corners[6], color);
        Debug.DrawLine(corners[6], corners[7], color);
        Debug.DrawLine(corners[7], corners[4], color);

        Debug.DrawLine(corners[0], corners[4], color);
        Debug.DrawLine(corners[1], corners[5], color);
        Debug.DrawLine(corners[2], corners[6], color);
        Debug.DrawLine(corners[3], corners[7], color);
    }
}
```

## Expand(Vector3)

Expand the bounds by: `size` + (`amount` \* 2) along each side.

```csharp
public void Expand(Vector3 amount)
```

### Parameters

**** (\[Vector3]\(/engine/6000.7/script-reference/unityengine/vector3)): 

### Remarks

Expands the bounds symmetrically by extending each side by the given amount, resulting in a total size increase of (amount × 2) per axis.

## Expand(Vector3)

Expand the bounds by: `size` + (`amount` \* 2) along each side.

```csharp
public void Expand(in Vector3 amount)
```

### Parameters

**** (\[Vector3]\(/engine/6000.7/script-reference/unityengine/vector3)): 

### Remarks

Expands the bounds symmetrically by extending each side by the given amount, resulting in a total size increase of (amount × 2) per axis.