// // exampleUpdate.js // examples/entityScripts // // Created by Brad Hefta-Gaub on 4/18/16. // Copyright 2016 High Fidelity, Inc. // // This is an example of an entity script which hooks the update signal // // 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 _this; // this is the "constructor" for the entity as a JS object we don't do much here, but we do want to remember // our this object, so we can access it in cases where we're called without a this (like in the case of various global signals) ExampleUpdate = function() { _this = this; }; ExampleUpdate.prototype = { // update() will be called regulary, because we've hooked the update signal in our preload() function. // we will check the avatars hand positions and if either hand is in our bounding box, we will notice that update: function() { // because the update() signal doesn't have a valid this, we need to use our memorized _this to access our entityID var entityID = _this.entityID; print("update in entityID:" + entityID); }, // preload() will be called when the entity has become visible (or known) to the interface // it gives us a chance to set our local JavaScript object up. In this case it means: // * remembering our entityID, so we can access it in cases where we're called without an entityID // * connecting to the update signal so we can check our grabbed state preload: function(entityID) { print("preload - entityID:" + entityID); this.entityID = entityID; Script.update.connect(this.update); }, // unload() will be called when our entity is no longer available. It may be because we were deleted, // or because we've left the domain or quit the application. In all cases we want to unhook our connection // to the update signal unload: function(entityID) { print("unload - entityID:" + entityID); Script.update.disconnect(this.update); }, }; // entity scripts always need to return a newly constructed object of our type return new ExampleUpdate(); })