From 84a3f6e8f433596c6b8aec99315da79030989fe0 Mon Sep 17 00:00:00 2001
From: David Rowe <david@ctrlaltstudio.com>
Date: Wed, 1 Oct 2014 15:00:19 -0700
Subject: [PATCH] Make recalibrate Leap-on-desk if avatar scale changes

---
 examples/leapHands.js | 19 +++++++++++++++++--
 1 file changed, 17 insertions(+), 2 deletions(-)

diff --git a/examples/leapHands.js b/examples/leapHands.js
index cc50a328f8..422aed940f 100644
--- a/examples/leapHands.js
+++ b/examples/leapHands.js
@@ -30,7 +30,9 @@ var leapHands = (function () {
         CALIBRATED = 2,
         CALIBRATION_TIME = 1000,  // milliseconds
         PI = 3.141593,
-        isWindows;
+        isWindows,
+        avatarScale,
+        settingsTimer;
 
     function printSkeletonJointNames() {
         var jointNames,
@@ -164,6 +166,8 @@ var leapHands = (function () {
 
         calibrationStatus = CALIBRATING;
 
+        avatarScale = MyAvatar.scale;
+
         // Set avatar arms vertical, forearms horizontal, as "zero" position for calibration
         MyAvatar.setJointData("LeftArm", Quat.fromPitchYawRollDegrees(90.0, 0.0, -90.0));
         MyAvatar.setJointData("LeftForeArm", Quat.fromPitchYawRollDegrees(90.0, 0.0, 180.0));
@@ -189,6 +193,13 @@ var leapHands = (function () {
         return false;
     }
 
+    function checkSettings() {
+        if (!isOnHMD && calibrationStatus && MyAvatar.scale !== avatarScale) {
+            print("Leap Motion: Recalibrate because avatar scale changed");
+            calibrationStatus = UNCALIBRATED;
+        }
+    }
+
     function setUp() {
 
         // TODO: Leap Motion controller joint naming doesn't match up with skeleton joint naming; numbers are out by 1.
@@ -280,6 +291,8 @@ var leapHands = (function () {
             print("Leap Motion is on desk");
             calibrationStatus = UNCALIBRATED;
         }
+
+        settingsTimer = Script.setInterval(checkSettings, 2000);
     }
 
     function moveHands() {
@@ -302,7 +315,7 @@ var leapHands = (function () {
 
             if (hands[h].controller.isActive()) {
 
-                // Calibrate when and if a controller is first active.
+                // Calibrate if necessary.
                 if (!checkCalibration()) {
                     return;
                 }
@@ -430,6 +443,8 @@ var leapHands = (function () {
             i,
             j;
 
+        Script.clearInterval(settingsTimer);
+
         for (h = 0; h < NUM_HANDS; h += 1) {
             Controller.releaseInputController(hands[h].controller);
             Controller.releaseInputController(wrists[h].controller);