# centroid

> The world space centroid (center) of the physics query shape when it intersects.

## Definition

* **Type:** Property
* **Namespace:** [UnityEngine](/engine/6000.7/script-reference/unityengine.md)
* **Assembly:** UnityEngine.Physics2DModule

```csharp
public Vector2 centroid { get; set; }
```

### Remarks

When the [RaycastHit2D](/engine/6000.7/script-reference/unityengine/raycasthit2d.md) result is returned from a linecast or raycast query, the `centroid` is identical to the returned [\_point](/engine/6000.7/script-reference/unityengine/raycasthit2d/point.md) property because a line or ray uses a very small point with no area, so its position is the same as the position it intersects a [Collider2D](/engine/6000.7/script-reference/unityengine/collider2d.md).

However, when using other physics queries that cast shapes that do have an area such as circles, capsules or boxes, the `centroid` is the center of the respective shape used when it is in contact with the returned [\_point](/engine/6000.7/script-reference/unityengine/raycasthit2d/point.md).  For example, a circle will always have its `centroid` be its radius away from the returned [\_point](/engine/6000.7/script-reference/unityengine/raycasthit2d/point.md).

The `centroid` helps identify the position the shape would be at for it to come into contact at the returned [\_point](/engine/6000.7/script-reference/unityengine/raycasthit2d/point.md).

Additional Resources: [\_point](/engine/6000.7/script-reference/unityengine/raycasthit2d/point.md), [\_point](/engine/6000.7/script-reference/unityengine/raycasthit2d/point.md)

### Examples

```csharp
using UnityEngine;

public class Example : MonoBehaviour
{
    // A stationary planet
    public Transform planet;

    // A satellite moving around the planet
    public Transform satellite;

    void Update()
    {
        // Cast a circle with a radius of 10 in from the satellite position to the planet position.
        RaycastHit2D hit = Physics2D.CircleCast(satellite.position, 10.0f, planet.position);

        // If something was hit, draw a line from the planet to the position the satellite would be if it were to hit the planet.
        if (hit)
            Debug.DrawLine(planet.position, hit.centroid, Color.yellow);
    }
}
```