From 543e9e3eb5c1a74c3854e7f30af14cb7dbd089ab Mon Sep 17 00:00:00 2001
From: David Rowe <david@ctrlaltstudio.com>
Date: Mon, 15 Sep 2014 20:22:53 -0700
Subject: [PATCH] Access wrist controller rotation only once per frame

---
 examples/leapHands.js | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/examples/leapHands.js b/examples/leapHands.js
index 08d4a918bf..e7080f0cbb 100644
--- a/examples/leapHands.js
+++ b/examples/leapHands.js
@@ -212,6 +212,7 @@ var leapHands = (function () {
             handPitch,
             handYaw,
             handRotation,
+            wristAbsRotation,
             locRotation;
 
         for (h = 0; h < NUM_HANDS; h += 1) {
@@ -229,8 +230,9 @@ var leapHands = (function () {
 
                 // TODO: 2.0* scale factor should not be necessary; Leap Motion controller code needs investigating.
                 handRoll = 2.0 * -hands[h].controller.getAbsRotation().z;
-                handPitch = 2.0 * -wrists[h].controller.getAbsRotation().x;
-                handYaw = 2.0 * wrists[h].controller.getAbsRotation().y;
+                wristAbsRotation = wrists[h].controller.getAbsRotation();
+                handPitch = 2.0 * -wristAbsRotation.x;
+                handYaw = 2.0 * wristAbsRotation.y;
 
                 // TODO: Leap Motion controller's right-hand roll calculation only works if physical hand is upside down.
                 // Approximate fix is to add a fudge factor.