X3D and VRML have been an international standard since 1997. They define a means to model and texture 3D geometry, animate it, and provide user interaction. As an International Standard (VRML: ISO/IEC 14772, and X3D: ISO/IEC 19775-19777) these have provided extraordinarly stable and long-lasting formats. Content developed 20 years ago still runs today. That is an important legacy that should not be lost. At the other end of the timescale (today), there are environments and capabilities that could not have been imagined when the first standard was approved. X3D needs to keep a foot in the ancient past (as far as computer time goes) and current so that history is not lost.

X3D defines localized audio sources and a generalized background source. The localized audio can be positioned in the environment and its range defined. The background audio permiates everywhere.

Imagine the situation where every house lock is made by one of three manufactures - Ambroid, Microlock, and Orange. All of the locks take your fingerprint to open, but each analyzes your fingerprint a little differently. Now the police need to enter your home (with justification). They do not have a fingerprint match, so they require Orange to create a keyhole for every lock that when using the proper key, the door will open.

X3D is the ISO standard for the display of 3D graphics on the Web (ISO/IEC 19775). Until the last year, it was necessary to have use a plug-in or specialized application to display and interact with 3D objects. In late 2014, the browser builders released versions of their browsers that provided a JavaScript interface to the underyling graphics system of your computer. This interface is called WebGL and is part of most HTML5 implementations. There are several different libraries that provide a simplier interface to the graphics.

November's terrorism attack in Paris elicited efforts by US officials to restrict or provide alternate means for decrypting messages. People in the Congress and the Intelligence Agencies repeated older requests for backdoors that would allow them to decrypt messages and content on devices.

The NY Times announced that they will be publisihing VR (360) news videos for Cardboard. They have just completed their second VR video. The Times will soon send all of their subscribers "Google Cardboard" to view these. There is another video scheduled for December and at least one more in 2016. This video, "The Displaced", tells the story of three children displaced by war and fighting and violence.

Events in X3D are the means for generating and handling behaviors. All changes in the state (including geometry, appearance, animation; but not animated images) are because at least one event was generated and processed. Events can be generated by timers, user interactions, response to other events, or from external sources. Events are routed fro a particular field of a node to another field of a different node. This cycle repeats throughout the time the scene is running. 

This post follows X3D Futures: Structure of the Next Version and uses concepts and descriptions presented there. It also assumes the presentation environment is an HTML5 compatible browser.

I have been doing a lot of thinking and talking with people working in computer-based 3D graphics to determine what the next generation of X3D should look like. There are important considerations and practices that need to be addressed. This post is an attempt to summarize the current state of X3D and the industry (primarily non-X3D) process of creating 3D scene. The next part will outline some of the options for the next generation.