//  Copyright 2016 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() {    var baseURL = "https://hifi-production.s3.amazonaws.com/hifi-production/DomainContent/CellScience/";    var self = this;    this.buttonImageURL = baseURL + "GUI/play_audio.svg?2";     this.preload = function(entityId) {        this.entityId = entityId;        this.initialize(entityId)        this.initTimeout = null;    }     this.initialize = function(entityId) {        //print(' should initialize' + entityId)        var properties = Entities.getEntityProperties(entityId);        if (properties.userData.length === 0 || properties.hasOwnProperty('userData') === false) {            self.initTimeout = Script.setTimeout(function() {                // print(' no user data yet, try again in one second')                self.initialize(entityId);            }, 1000)         } else {            //print(' userdata before parse attempt' + properties.userData)            self.userData = null;            try {                self.userData = JSON.parse(properties.userData);            } catch (err) {                // print(' error parsing json');                // print(' properties are:' + properties.userData);                return;            }             self.addButton();            self.buttonShowing = false;            self.showDistance = self.userData.showDistance;            self.soundURL = baseURL + "Audio/" + self.userData.soundName + ".wav";            // print("distance = " + self.userData.showDistance + ", sound = " + self.soundURL);            self.soundOptions = {                stereo: true,                loop: false,                localOnly: true,                volume: 1            };            self.sound = SoundCache.getSound(this.soundURL);         }    }     this.addButton = function() {        this.windowDimensions = Controller.getViewportDimensions();        this.buttonWidth = 100;        this.buttonHeight = 100;        this.buttonPadding = 0;         this.buttonPositionX = (self.windowDimensions.x - self.buttonPadding) / 2 - self.buttonWidth;        this.buttonPositionY = (self.windowDimensions.y - self.buttonHeight) - (self.buttonHeight + self.buttonPadding);        this.button = Overlays.addOverlay("image", {            x: self.buttonPositionX,            y: self.buttonPositionY,            width: self.buttonWidth,            height: self.buttonHeight,            imageURL: self.buttonImageURL,            visible: false,            alpha: 1.0        });    }     this.update = function(deltaTime) {         self.distance = Vec3.distance(MyAvatar.position, Entities.getEntityProperties(self.entityId).position);        //print(self.distance);        if (!self.buttonShowing && self.distance < self.userData.showDistance) {            self.buttonShowing = true;            Overlays.editOverlay(self.button, {                visible: true            });        } else if (self.buttonShowing && self.distance > self.userData.showDistance) {            self.buttonShowing = false;            Overlays.editOverlay(self.button, {                visible: false            });        }    }     this.onClick = function(event) {        var clickedOverlay = Overlays.getOverlayAtPoint({            x: event.x,            y: event.y        });        if (clickedOverlay === self.button) {            //print("button was clicked");            if (self.sound.downloaded) {                //print("play sound");                Audio.playSound(self.sound, self.soundOptions);            } else {                //print("not downloaded");            }        }    }     this.unload = function() {        Overlays.deleteOverlay(self.button);        Controller.mousePressEvent.disconnect(this.onClick);        Script.update.disconnect(this.update);        if (this.initTimeout !== null) {            Script.clearTimeout(this.initTimeout);        }    }     Controller.mousePressEvent.connect(this.onClick);    Script.update.connect(this.update); });