--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/middleware/src/Tracking/Gestures/GestureDetector.cs	Fri Mar 09 14:52:11 2012 +0100
@@ -0,0 +1,139 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using Microsoft.Kinect;
+using System.Drawing;
+
+namespace Trakers.Tracking.Gestures
+{
+    public class GestureDetector
+    {
+        //Historique des positions du squelette.
+        protected List<List<Joint>> history = new List<List<Joint>>();
+        //protected JointCollection previousSkeleton;
+
+        //Voici les ID des noeuds d'un squelette.
+        protected int hipCenterID = 0, spineID = 1, shoulderCenterID = 2, headID = 3;
+        protected int shoulderLeftID = 4, elbowLeftID = 5, wristLeftID = 6, handLeftID = 7;
+        protected int shoulderRightID = 8, elbowRightID = 9, wristRightID = 10, handRightID = 11;
+        protected int hipLeftID = 12, kneeLeftID = 13, ankleLeftID = 14, footLeftID = 15;
+        protected int hipRightID = 16, kneeRightID = 17, ankleRightID = 18, footRightID = 19;
+
+        //Elements nécessaires à la reconnaissance du geste :
+        //Distance du parcours du geste (va dépendre de la distance de l'utilisateur).
+        protected float refDistance;
+        //Position de départ pour le geste.
+        protected SkeletonPoint startPoint;
+        //Estimation du temps que prend la gesture (en s).
+        protected float gesturePeriod = 1;
+        //Estimation du nombre d'indexes par seconde (framerate).
+        protected int indexesPerSecond = 30;
+        //Estimation du nombre de positions du squelette à vérifier dans l'historique.
+        protected int indexesToCheck;// = gesturePeriod * indexesPerSecond;
+
+        public GestureDetector()
+        {
+            
+        }
+
+        //Setters.
+        public void setRefDistance(float _refDistance)
+        {
+            refDistance = _refDistance;
+        }
+        public void setStartPoint(SkeletonPoint _startPoint)
+        {
+            startPoint = _startPoint;
+        }
+        public void setGesturePeriod(float _gesturePeriod)
+        {
+            gesturePeriod = _gesturePeriod;
+        }
+        public void setIndexesPerSecond(int _indexesPerSecond)
+        {
+            indexesPerSecond = _indexesPerSecond;
+        }
+        public void setIndexesToCheck(int _indexesToCheck)
+        {
+            indexesToCheck = _indexesToCheck;
+        }
+
+        //Getters.
+        public float getRefDistance()
+        {
+            return refDistance;
+        }
+        public SkeletonPoint getStartPoint()
+        {
+            return startPoint;
+        }
+        public float getGesturePeriod()
+        {
+            return gesturePeriod;
+        }
+        public int getIndexesPerSecond()
+        {
+            return indexesPerSecond;
+        }
+        public int getIndexesToCheck()
+        {
+            return indexesToCheck;
+        } 
+
+        //Stocke les gestes du skelette pour ~3 seconds (si on prend en compte que le framerate de la Kinect
+        //est de ~30 fps.
+        public void UpdateSkeletonHistory(List<Joint> latestSkeleton)
+        {
+            /*if (previousSkeleton == null)
+                previousSkeleton = latestSkeleton;
+            else if (previousSkeleton != latestSkeleton)
+            {*/
+                history.Add(latestSkeleton);
+                /*if (history.Count > 3)
+                {
+                    System.Console.WriteLine(history[0][0].Position.X + " " + history[1][0].Position.X + " " + history[2][0].Position.X);
+                }*/
+                if (history.Count > 90)
+                {
+                    history.RemoveAt(0);
+                }
+            //}
+        }
+
+        /*public bool CheckForHandWave()
+        {
+            //Crée un historique de squelette local, puisque l'historique est mis à jour toutes les ~1/30 s.
+            List<Skeleton> history = new List<Skeleton>(history);
+            //Si il n'y a pas assez de positions dans l'historique local pour vérifier le geste.
+            if (history.Count < indexesToCheck)
+                return false;
+
+            float refDistance = Math.Abs(history[0].Joints.ElementAt(spineID).Position.Y - history[0].Joints.ElementAt(hipCenterID).Position.Y);
+            float startPos = history[history.Count - indexesToCheck].Joints.ElementAt(handRightID).Position.X;
+            bool movedRight = false;
+            for (int i = history.Count - indexesToCheck + 1; i < history.Count; i++)
+            {
+                // Throughout the gesture period, right hand should be above theelbow, below the head and hand should be higher than the wrist
+                if (!(history[i].Joints[JointID.HandRight].Position.Y > history[i].Joints[JointID.ElbowRight].Position.Y + refDistance &&
+                history[i].Joints[JointID.HandRight].Position.Y < history[i].Joints[JointID.Head].Position.Y &&
+                history[i].Joints[JointID.HandRight].Position.Y > history[i].Joints[JointID.WristRight].Position.Y + refDistance / 4))
+                {
+                    return false;
+                }
+                // If the previous condition was met, check if the hand has moved to the right
+                if (history[i].Joints[JointID.HandRight].Position.X >= startPos + refDistance / 2 && !movedRight)
+                {
+                    movedRight = true;
+                }
+                // If the hand did move to the right, check if it returned near the original position
+                if (movedRight && history[i].Joints[JointID.HandRight].Position.X <= startPos + refDistance / 5)
+                {
+                    skeletonHistory.Clear();
+                    return true;
+                }
+            }
+                return false;
+        }*/
+    }
+}