Unity game engine local bounds script with child component encapsulation.

BoundsExtension.cs

using UnityEngine;

public static class BoundsExtension : MonoBehaviour
{
	public static Bounds LocalBounds(GameObject parentObject)
	{
		List<MeshFilter> meshs = new List<MeshFilter>();
		meshs.AddRange(parentObject.GetComponentsInChildren<MeshFilter>());

		Debug.Log(meshs.Count);

		Bounds finalBounds = new Bounds();
		for (int i = 0; i < meshs.Count; i++)
		{
			var meshTransform = meshs[i].transform;
			var bounds = meshs[i].mesh.bounds;
			var size = bounds.size;
			size.x *= meshTransform.localScale.x;
			size.y *= meshTransform.localScale.y;
			size.z *= meshTransform.localScale.z;
			bounds.size = size + 2 * meshTransform.localPosition;
			finalBounds.Encapsulate(bounds);
		}
		Debug.Log(finalBounds.size);
		Debug.Log(finalBounds.extents);
		Debug.Log(finalBounds.center);
		return finalBounds;
	}
}