//  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 TARGET_OFFSET = {        x: -1,        y: 1,        z: -1    }     var baseURL = "https://hifi-content/DomainContent/CellScience/";     var self = this;     this.preload = function(entityId) {        this.entityId = entityId;        this.initialize(entityId);        self.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.data = self.userData;            self.buttonImageURL = baseURL + "GUI/GUI_jump_off.png";            self.addExitButton();            self.isRiding = false;            self.mouseIsConnected = false;            if (self.data && self.data.isDynein) {                self.rotation = 180;            } else {                self.rotation = 0;            }        }    }       this.addExitButton = function() {        this.windowDimensions = Controller.getViewportDimensions();        this.buttonWidth = 75;        this.buttonHeight = 75;        this.buttonPadding = 10;         this.buttonPositionX = (self.windowDimensions.x - self.buttonPadding) / 2 - self.buttonWidth / 2;        this.buttonPositionY = (self.windowDimensions.y - self.buttonHeight) - (self.buttonHeight + self.buttonPadding);        this.exitButton = Overlays.addOverlay("image", {            x: self.buttonPositionX,            y: self.buttonPositionY,            width: self.buttonWidth,            height: self.buttonHeight,            imageURL: self.buttonImageURL,            visible: false,            alpha: 1.0        });    }     this.clickReleaseOnEntity = function(entityId, mouseEvent) {         //print('CLICKED ON MOTOR PROTEIN')        return;        if (mouseEvent.isLeftButton && !self.isRiding) {            //print("GET ON");            self.isRiding = true;            if (!self.entityId) {                self.entityId = entityId;            }            self.entityLocation = Entities.getEntityProperties(self.entityId, "position").position;            self.targetLocation = Vec3.sum(self.entityLocation, TARGET_OFFSET);            Overlays.editOverlay(self.exitButton, {                visible: true            });            Controller.mousePressEvent.connect(this.onMousePress);            self.mouseIsConnected = true;            Script.update.connect(this.update);        }    }     this.lastAvatarPosition = null;    this.lastEntityPosition = null;    this.update = function(deltaTime) {        if (self.isRiding !== true) {            return        }         Entities.editEntity(self.entityId, {            velocity: {                x: 1,                y: 0,                z: 0            }        })        self.lastEntityLocation = self.entityLocation;        self.lastTargetLocation = self.targetLocation        self.entityLocation = Entities.getEntityProperties(self.entityId, "position").position;        self.targetLocation = Vec3.sum(self.entityLocation, TARGET_OFFSET);        //  print('Script.clearTimeout self.lastTargetLocation' + JSON.stringify(self.lastTargetLocation))        //  print('Script.clearTimeout self.targetLocation' + JSON.stringify(self.targetLocation))        var diff = Vec3.distance(self.targetLocation, self.lastTargetLocation);        // print('Script.clearTimeout diff is::' + diff)        self.addThrustToAvatar(deltaTime);    }      this.addThrustToAvatar = function(deltaTime) {        var targetCurrentLocationToLastLocation = Vec3.subtract(self.targetLocation, self.lastTargetLocation);         // print('Script.clearTimeout targetCurrentLocationToLastLocation' + JSON.stringify(targetCurrentLocationToLastLocation));        // print('Script.clearTimeout deltaTime' + deltaTime)        // print('Script.clearTimeout velocity' + JSON.stringify(self.velocity))        var thrustToAdd = Vec3.multiply(100, targetCurrentLocationToLastLocation);        thrustToAdd = Vec3.multiply(thrustToAdd, 1 / deltaTime);        // print('Script.clearTimeout adding thrust!' + JSON.stringify(thrustToAdd))         MyAvatar.addThrust(thrustToAdd);     }     this.onMousePress = function(event) {        var clickedOverlay = Overlays.getOverlayAtPoint({            x: event.x,            y: event.y        });        if (event.isLeftButton && clickedOverlay === self.exitButton) {            //print("GET OFF");            Script.update.disconnect(this.update);            self.reset();        }    }     this.reset = function() {        // print('reset')        if (self.isRiding) {            Overlays.editOverlay(this.exitButton, {                visible: false            });        }        self.isRiding = false;    }     this.unload = function() {        // print("unload");        self.reset();         if (self.mouseIsConnected === true) {            Controller.mousePressEvent.disconnect(self.onMousePress);        }        if (self.initTimeout !== null) {            Script.clearTimeout(self.initTimeout);        }    } });