Kinect function to compare two bodies (recordedjoints is a variable, joints is a function parameter)

gistfile1.cs

 double CompareCurrentBody(IReadOnlyDictionary<JointType, Joint> joints)
        {
            if (recordedJointPoints == null)
                throw new Exception("No recorded points");

            var jointConnections = new List<Tuple<JointType, JointType>>()
            {
                // Torso
                new Tuple<JointType, JointType> (JointType.Head, JointType.Neck),
                new Tuple<JointType, JointType> (JointType.Neck, JointType.SpineShoulder),
                new Tuple<JointType, JointType> (JointType.SpineShoulder, JointType.SpineMid),
                new Tuple<JointType, JointType> (JointType.SpineMid, JointType.SpineBase),
                new Tuple<JointType, JointType> (JointType.SpineShoulder, JointType.ShoulderRight),
                new Tuple<JointType, JointType> (JointType.SpineShoulder, JointType.ShoulderLeft),
                new Tuple<JointType, JointType> (JointType.SpineBase, JointType.HipRight),
                new Tuple<JointType, JointType> (JointType.SpineBase, JointType.HipLeft),

                // Right Arm
                new Tuple<JointType, JointType> (JointType.ShoulderRight, JointType.ElbowRight),
                new Tuple<JointType, JointType> (JointType.ElbowRight, JointType.WristRight),
                new Tuple<JointType, JointType> (JointType.WristRight, JointType.HandRight),
                new Tuple<JointType, JointType> (JointType.HandRight, JointType.HandTipRight),
                new Tuple<JointType, JointType> (JointType.WristRight, JointType.ThumbRight),

                // Left Arm
                new Tuple<JointType, JointType> (JointType.ShoulderLeft, JointType.ElbowLeft),
                new Tuple<JointType, JointType> (JointType.ElbowLeft, JointType.WristLeft),
                new Tuple<JointType, JointType> (JointType.WristLeft, JointType.HandLeft),
                new Tuple<JointType, JointType> (JointType.HandLeft, JointType.HandTipLeft),
                new Tuple<JointType, JointType> (JointType.WristLeft, JointType.ThumbLeft),

                // Right Leg
                new Tuple<JointType, JointType> (JointType.HipRight, JointType.KneeRight),
                new Tuple<JointType, JointType> (JointType.KneeRight, JointType.AnkleRight),
                new Tuple<JointType, JointType> (JointType.AnkleRight, JointType.FootRight),

                // Left leg
                new Tuple<JointType, JointType> (JointType.HipLeft, JointType.KneeLeft),
                new Tuple<JointType, JointType> (JointType.KneeLeft, JointType.AnkleLeft),
                new Tuple<JointType, JointType> (JointType.AnkleLeft, JointType.FootLeft)
            };

            List<double> dots = new List<double>();
            Vector3D v1, v2;
            // Go through all connections
            foreach (var connection in jointConnections)
            {
                // Ignore if we are not tracking this connection
                if (joints[connection.Item1].TrackingState == TrackingState.NotTracked ||
                    joints[connection.Item2].TrackingState == TrackingState.NotTracked ||
                    recordedJointPoints[connection.Item1].TrackingState == TrackingState.NotTracked ||
                    recordedJointPoints[connection.Item2].TrackingState == TrackingState.NotTracked)
                {
                    continue;
                }

                // Get vectors from each connection
                v1 = Vector(connection.Item1, connection.Item2, joints);
                v2 = Vector(connection.Item1, connection.Item2, recordedJointPoints);

                // Compare with dot product
                dots.Add(Vector3D.DotProduct(v1, v2));
            }

            // Return the average of dot products
            return Math.Max(0, dots.Average());
        }