Axiom.Core.SubEntity.GetSquaredViewDepth C# (CSharp) Method

		public float GetSquaredViewDepth( Camera camera )
		{
			// First of all, check the cached value
			// NB this is manually invalidated by parent each _notifyCurrentCamera call
			// Done this here rather than there since we only need this for transparent objects
			if ( cachedCamera == camera )
				return cachedCameraDist;

			Node node = Parent.ParentNode;
			Debug.Assert( node != null );
			Real dist;
#warning SubMesh.ExtremityPoints implementation needed.
			//if (!subMesh.extremityPoints.empty())
			//{
			//    const Vector3 &cp = cam->getDerivedPosition();
			//    const Matrix4 &l2w = mParentEntity->_getParentNodeFullTransform();
			//    dist = std::numeric_limits<Real>::infinity();
			//    for (vector<Vector3>::type::const_iterator i = mSubMesh->extremityPoints.begin();
			//         i != mSubMesh->extremityPoints.end (); ++i)
			//    {
			//        Vector3 v = l2w * (*i);
			//        Real d = (v - cp).squaredLength();

			//        dist = std::min(d, dist);
			//    }
			//}
			//else
			{
				dist = node.GetSquaredViewDepth( camera );
			}
			cachedCameraDist = dist;
			cachedCamera = camera;

			return dist;
		}