diff --git a/kinect_codes/chSK_ex03_joint_distance/chSK_ex03_joint_distance.pde b/kinect_codes/chSK_ex03_joint_distance/chSK_ex03_joint_distance.pde
new file mode 100644
index 0000000..3cbd47b
--- /dev/null
+++ b/kinect_codes/chSK_ex03_joint_distance/chSK_ex03_joint_distance.pde
@@ -0,0 +1,71 @@
+import SimpleOpenNI.*;
+SimpleOpenNI  kinect;
+
+void setup() {
+  kinect = new SimpleOpenNI(this);
+  kinect.enableDepth();
+  kinect.enableUser(SimpleOpenNI.SKEL_PROFILE_ALL);
+
+  size(640, 480);
+  stroke(255,0,0);
+  strokeWeight(5);
+}
+
+void draw() {
+  kinect.update();
+  image(kinect.depthImage(), 0, 0);
+  
+  IntVector userList = new IntVector();
+  kinect.getUsers(userList);
+
+  if (userList.size() > 0) {
+    int userId = userList.get(0);
+
+    if ( kinect.isTrackingSkeleton(userId)) {      
+      PVector leftHand = new PVector();
+      PVector rightHand = new PVector();
+    
+      kinect.getJointPositionSkeleton(userId, SimpleOpenNI.SKEL_LEFT_HAND, leftHand);      
+      kinect.getJointPositionSkeleton(userId, SimpleOpenNI.SKEL_RIGHT_HAND, rightHand);
+      
+      // calculate difference by subtracting one vector from another
+      PVector differenceVector = PVector.sub(leftHand, rightHand);
+      // calculate the distance and direction
+      // of the difference vector
+      float magnitude = differenceVector.mag();
+      differenceVector.normalize();
+      // draw a line between the two handsst
+      kinect.drawLimb(userId, SimpleOpenNI.SKEL_LEFT_HAND, SimpleOpenNI.SKEL_RIGHT_HAND);
+      // display
+      pushMatrix();
+        scale(4);
+        fill(differenceVector.x * 255, differenceVector.y * 255, differenceVector.z * 255);
+        text("m: " + magnitude, 5, 10);
+      popMatrix();
+    }
+  }
+}
+
+
+// user-tracking callbacks!
+void onNewUser(int userId) {
+  println("start pose detection");
+  kinect.startPoseDetection("Psi", userId);
+}
+
+void onEndCalibration(int userId, boolean successful) {
+  if (successful) { 
+    println("  User calibrated !!!");
+    kinect.startTrackingSkeleton(userId);
+  } 
+  else { 
+    println("  Failed to calibrate user !!!");
+    kinect.startPoseDetection("Psi", userId);
+  }
+}
+
+void onStartPose(String pose, int userId) {
+  println("Started pose for user");
+  kinect.stopPoseDetection(userId); 
+  kinect.requestCalibrationSkeleton(userId, true);
+}
\ No newline at end of file
diff --git a/kinect_codes/chSK_ex03_joint_distance/distance_130.70207.png b/kinect_codes/chSK_ex03_joint_distance/distance_130.70207.png
new file mode 100644
index 0000000..8279b19
Binary files /dev/null and b/kinect_codes/chSK_ex03_joint_distance/distance_130.70207.png differ