From eb4dee0495d292eb97e4193c592c2cf044e21e3f Mon Sep 17 00:00:00 2001
From: Triplelexx <mojolexx@gmail.com>
Date: Fri, 10 Mar 2017 23:37:29 +0000
Subject: [PATCH] create audioMuteOverlay.js

client scipt that creates an overlay to provide mute feedback
---
 scripts/system/audioMuteOverlay.js | 122 +++++++++++++++++++++++++++++
 1 file changed, 122 insertions(+)
 create mode 100644 scripts/system/audioMuteOverlay.js

diff --git a/scripts/system/audioMuteOverlay.js b/scripts/system/audioMuteOverlay.js
new file mode 100644
index 0000000000..bb1eb70aa9
--- /dev/null
+++ b/scripts/system/audioMuteOverlay.js
@@ -0,0 +1,122 @@
+"use strict";
+/* jslint vars: true, plusplus: true, forin: true*/
+/* globals Tablet, Script, AvatarList, Users, Entities, MyAvatar, Camera, Overlays, Vec3, Quat, Controller, print, getControllerWorldLocation */
+/* eslint indent: ["error", 4, { "outerIIFEBody": 0 }] */
+//
+// audioMuteOverlay.js
+//
+// client scipt that creates an overlay to provide mute feedback
+//
+// Created by Triplelexx on 17/03/09
+// Copyright 2017 High Fidelity, Inc.
+//
+// Distributed under the Apache License, Version 2.0.
+// See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html
+//
+
+(function() { // BEGIN LOCAL_SCOPE
+    var TWEEN_SPEED = 0.025;
+    var LERP_AMOUNT = 0.25;
+
+    var overlayPosition = Vec3.ZERO;
+    var tweenPosition = 0;
+    var startColor = {
+        red: 150,
+        green: 150,
+        blue: 150
+    };
+    var endColor = {
+        red: 255,
+        green: 0,
+        blue: 0
+    };
+    var overlayID;
+
+    AudioDevice.muteToggled.connect(onMuteToggled);
+    Script.update.connect(update);
+    Script.scriptEnding.connect(cleanup);
+
+    function update(dt) {
+        if (!AudioDevice.getMuted()) {
+            return;
+        }
+        updateTween();
+    }
+
+    function lerp(a, b, val) {
+        return (1 - val) * a + val * b;
+    }
+
+    function getOffsetPosition() {
+        return Vec3.sum(MyAvatar.getHeadPosition(), Quat.getFront(MyAvatar.headOrientation));
+    }   
+    
+    function updateTween() {
+        // increase the tween value based on speed till it's complete
+        if (tweenPosition < 1) {
+            tweenPosition += TWEEN_SPEED;
+        } else {
+            // after tween completion reset to zero and flip values to ping pong 
+            tweenPosition = 0;
+            var buf = startColor.red;
+            startColor.red = endColor.red;
+            endColor.red = buf;
+            buf = startColor.green;
+            startColor.green = endColor.green;
+            endColor.green = buf;
+            buf = startColor.blue;
+            startColor.blue = endColor.blue;
+            endColor.blue = buf;
+        }
+
+        // update position based on LERP_AMOUNT
+        var offsetPosition = getOffsetPosition();
+        overlayPosition.x = lerp(overlayPosition.x, offsetPosition.x, LERP_AMOUNT);
+        overlayPosition.y = lerp(overlayPosition.y, offsetPosition.y, LERP_AMOUNT);
+        overlayPosition.z = lerp(overlayPosition.z, offsetPosition.z, LERP_AMOUNT);
+
+        Overlays.editOverlay(overlayID, {
+            color: {
+                red: lerp(startColor.red, endColor.red, tweenPosition),
+                green: lerp(startColor.green, endColor.green, tweenPosition),
+                blue: lerp(startColor.blue, endColor.blue, tweenPosition)
+            },
+            position: overlayPosition,
+            rotation: MyAvatar.orientation,
+        });
+    }
+
+    function onMuteToggled() {
+        if (AudioDevice.getMuted()) {
+            createOverlay();
+        } else {
+            deleteOverlay();
+        }
+    }
+
+    function createOverlay() {
+        overlayPosition = getOffsetPosition();
+        overlayID = Overlays.addOverlay("sphere", {
+            name: "muteSphere",
+            position: overlayPosition,
+            rotation: MyAvatar.orientation,
+            alpha: 0.9,
+            dimensions: 0.1,
+            solid: true,
+            ignoreRayIntersection: true,
+            visible: true
+        });
+    }
+
+    function deleteOverlay() {
+        Overlays.deleteOverlay(overlayID);
+    }
+
+    function cleanup() {
+        if (overlayID) {
+            deleteOverlay();
+        }
+        AudioDevice.muteToggled.disconnect(onMuteToggled);
+        Script.update.disconnect(update);
+    }
+}()); // END LOCAL_SCOPE