From 2c535fa204ab97ca7bfb4f772d978dfd64c3c205 Mon Sep 17 00:00:00 2001
From: Seth Alves <seth.alves@gmail.com>
Date: Thu, 26 Sep 2019 12:41:14 -0700
Subject: [PATCH] touching tips of index-fingers together means walk forward

---
 scripts/defaultScripts.js         |  3 +-
 scripts/system/hand-track-walk.js | 69 +++++++++++++++++++++++++++++++
 2 files changed, 71 insertions(+), 1 deletion(-)
 create mode 100644 scripts/system/hand-track-walk.js

diff --git a/scripts/defaultScripts.js b/scripts/defaultScripts.js
index 1eac2ae0aa..a19bb9c41a 100644
--- a/scripts/defaultScripts.js
+++ b/scripts/defaultScripts.js
@@ -35,7 +35,8 @@ var DEFAULT_SCRIPTS_COMBINED = [
     "system/miniTablet.js",
     "system/audioMuteOverlay.js",
     "system/inspect.js",
-    "system/keyboardShortcuts/keyboardShortcuts.js"
+    "system/keyboardShortcuts/keyboardShortcuts.js",
+    "system/hand-track-walk.js"
 ];
 var DEFAULT_SCRIPTS_SEPARATE = [
     "system/controllers/controllerScripts.js",
diff --git a/scripts/system/hand-track-walk.js b/scripts/system/hand-track-walk.js
new file mode 100644
index 0000000000..cb9b700ae5
--- /dev/null
+++ b/scripts/system/hand-track-walk.js
@@ -0,0 +1,69 @@
+
+/* global Script, Controller, Vec3 */
+/* jshint loopfunc:true */
+
+(function() {
+
+    var mappingName = 'hand-track-walk-' + Math.random();
+    var inputMapping = Controller.newMapping(mappingName);
+
+    var leftIndexPos = null;
+    var rightIndexPos = null;
+
+    var pinchOnBelowDistance = 0.016;
+    var pinchOffAboveDistance = 0.04;
+
+    var walking = false;
+
+    function updateWalking() {
+        if (leftIndexPos && rightIndexPos) {
+            var tipDistance = Vec3.distance(leftIndexPos, rightIndexPos);
+            if (tipDistance < pinchOnBelowDistance) {
+                print("qqqq walking");
+                walking = true;
+            } else if (walking && tipDistance > pinchOffAboveDistance) {
+                print("qqqq stopping");
+                walking = false;
+            }
+        }
+    }
+
+    function leftIndexChanged(pose) {
+        if (pose.valid) {
+            leftIndexPos = pose.translation;
+        } else {
+            leftIndexPos = null;
+        }
+        updateWalking();
+    }
+
+    function rightIndexChanged(pose) {
+        if (pose.valid) {
+            rightIndexPos = pose.translation;
+        } else {
+            rightIndexPos = null;
+        }
+        updateWalking();
+    }
+
+    function cleanUp() {
+        inputMapping.disable();
+    }
+
+    Script.scriptEnding.connect(function () {
+        cleanUp();
+    });
+
+    inputMapping.from(Controller.Standard.LeftHandIndex4).peek().to(leftIndexChanged);
+    inputMapping.from(Controller.Standard.RightHandIndex4).peek().to(rightIndexChanged);
+
+    inputMapping.from(function() {
+        if (walking) {
+            return -1;
+        } else {
+            return Controller.getActionValue(Controller.Standard.TranslateZ);
+        }
+    }).to(Controller.Actions.TranslateZ);
+
+    Controller.enableMapping(mappingName);
+})();