# CullSphereGroup.getDelta

Queries the change in overlapping spheres since the last call to getDelta.

**Kind:** Function

**Environments:** Game

## Game

``` { .lua .api-signature }
cullSphereGroup:getDelta( position, innerRadius, outerRadius )
```

[Open the full Game reference](../Game-Script-Environment/Userdata/CullSphereGroup.md#getdelta)

**Parameters:**

| Name | Type | Description |
| --- | --- | --- |
| `sphereGroup` | [CullSphereGroup](../Game-Script-Environment/Userdata/CullSphereGroup.md) | The sphere group. |
| `position` | [Vec3](../Game-Script-Environment/Userdata/Vec3.md) | Position to query sphere. |
| `innerRadius` | number | Radius for inner sphere. |
| `outerRadius` | number | Radius for outer sphere. |

**Returns:**

| Type | Description |
| --- | --- |
| table<br>table | Arrays of removed, added ids \{integer, ...\}. |