Kinect.KinectManager.GetLeftHandInteractionBox C# (CSharp) Method

        public bool GetLeftHandInteractionBox(Int64 userId, ref Vector3 leftBotBack, ref Vector3 rightTopFront, bool bValidBox)
        {
            if (dictUserIdToIndex.ContainsKey(userId))
            {
                int index = dictUserIdToIndex[userId];

                if (index >= 0 && index < sensorData.bodyCount &&
                    bodyFrame.bodyData[index].bIsTracked != 0)
                {
                    KinectInterop.BodyData bodyData = bodyFrame.bodyData[index];
                    bool bResult = true;

                    if (bodyData.joint[(int)KinectInterop.JointType.ShoulderRight].trackingState != KinectInterop.TrackingState.NotTracked &&
                       bodyData.joint[(int)KinectInterop.JointType.HipLeft].trackingState != KinectInterop.TrackingState.NotTracked)
                    {
                        rightTopFront.x = bodyData.joint[(int)KinectInterop.JointType.ShoulderRight].position.x;
                        leftBotBack.x = rightTopFront.x - 2 * (rightTopFront.x - bodyData.joint[(int)KinectInterop.JointType.HipLeft].position.x);
                    }
                    else
                    {
                        bResult = bValidBox;
                    }

                    if (bodyData.joint[(int)KinectInterop.JointType.HipRight].trackingState != KinectInterop.TrackingState.NotTracked &&
                       bodyData.joint[(int)KinectInterop.JointType.ShoulderRight].trackingState != KinectInterop.TrackingState.NotTracked)
                    {
                        leftBotBack.y = bodyData.joint[(int)KinectInterop.JointType.HipRight].position.y;
                        rightTopFront.y = bodyData.joint[(int)KinectInterop.JointType.ShoulderRight].position.y;

                        float fDelta = (rightTopFront.y - leftBotBack.y) * 0.35f; // * 2 / 3;
                        leftBotBack.y += fDelta;
                        rightTopFront.y += fDelta;
                    }
                    else
                    {
                        bResult = bValidBox;
                    }

                    if (bodyData.joint[(int)KinectInterop.JointType.SpineBase].trackingState != KinectInterop.TrackingState.NotTracked)
                    {
                        leftBotBack.z = bodyData.joint[(int)KinectInterop.JointType.SpineBase].position.z;
                        rightTopFront.z = leftBotBack.z - 0.5f;
                    }
                    else
                    {
                        bResult = bValidBox;
                    }

                    return bResult;
                }
            }

            return false;
        }