# Add(PhysicsShapeGroup2D)

> Adds a copy of all the PhysicsShape2D and their geometry from the specified physicsShapeGroup into this shape group. The specified physicsShapeGroup is not modified.

## Definition

* **Type:** Method
* **Namespace:** [UnityEngine](/engine/6000.5/script-reference/unityengine.md)
* **Assembly:** UnityEngine.Physics2DModule

```csharp
public void Add(PhysicsShapeGroup2D physicsShapeGroup)
```

### Parameters

**** (\[PhysicsShapeGroup2D]\(/engine/6000.5/script-reference/unityengine/physicsshapegroup2d)): The [PhysicsShapeGroup2D](/engine/6000.5/script-reference/unityengine/physicsshapegroup2d.md) to add to this shape group. (Read Only)

### Examples

```csharp
using UnityEngine;
using UnityEngine.Assertions;

public class Example : MonoBehaviour
{
    private const int ShapeCount = 10;

    void Start()
    {
        // Create a shape group and add a Circle to it.
        var shapeGroup1 = new PhysicsShapeGroup2D();
        shapeGroup1.AddCircle
            (
                center: Vector2.zero,
                radius: 1f
            );

        // Validate the contents.
        Assert.AreEqual(1, shapeGroup1.shapeCount);
        Assert.AreEqual(1, shapeGroup1.vertexCount);
        Assert.AreEqual(PhysicsShapeType2D.Circle, shapeGroup1.GetShape(0).shapeType);

        // Create another shape group and add a Box to it.
        var shapeGroup2 = new PhysicsShapeGroup2D();
        shapeGroup2.AddBox
            (
                center: new Vector2(3f, 2f),
                size: new Vector2(1f, 1f)
            );

        // Validate the contents.
        Assert.AreEqual(1, shapeGroup2.shapeCount);
        Assert.AreEqual(4, shapeGroup2.vertexCount);
        Assert.AreEqual(PhysicsShapeType2D.Polygon, shapeGroup2.GetShape(0).shapeType);

        // Add the second shape group to the first shape group.
        shapeGroup1.Add(shapeGroup2);

        // Validate the contents.
        Assert.AreEqual(1 + 1, shapeGroup1.shapeCount);
        Assert.AreEqual(1 + 4, shapeGroup1.vertexCount);
        Assert.AreEqual(PhysicsShapeType2D.Circle, shapeGroup1.GetShape(0).shapeType);
        Assert.AreEqual(PhysicsShapeType2D.Polygon, shapeGroup1.GetShape(1).shapeType);
    }
}
```