Virtual World Framework & OMeta: collaborative programming of distributed objects with user defined languages
The talk contains examples of collaborative programming of distributed objects with user defined grammars. These objects could exist alongside with each other in the same replicated virtual world, being programmed on quite different languages, but holding the same simulation.
The project introduces the **Curved Space Explorer for Squeak project**, known as CCSE by Krestianstvo SDK. Curved Space Explorer for Squeak
It is a Smalltalk port version of Curved Spaces, originally developed by Jeff Weeks (http://www.geometrygames.org) in C language. This Squeak version is derived from Krestianstvo SDK project's version, where Curved Space Explorer is collaborative in it's nature and available mainly for distributed computation. The aim of this project is to make Curved Space Explorer being available for the large Smalltalk audience and mainstream Squeak distribution, so that anybody interested could work with it.
The project is Open Source and the code is available here: http://sdk.krestianstvo.org/sdk/ccse.html
The instructions are here: http://nsuslovi.blogspot.com/2013/07/curved-space-explorer-for-squeak.html
CAVE is built up with 5 computers, running Krestianstvo SDK 2.0 (OpenQwaq based) image on each. Head tracking is avaliable through Microsoft Kinect. CAVE implementation is based on Daniel Faken work. CAVE: Virtual Reality System
Code is freely available in Krestianstvo SDK.
Visitors control the lights with movements of their bodys. Installation with Kinect & DMX
Microsoft Kinect, DMX controller, LightJockey, Krestianstvo SDK 2.0, Processing were used to drive the installation. It was presented at Arch Moscow 2011 exhibition (HALL 25, ANOTHERARCHITECT, Germany)
Multi-touch table based on Krestianstvo SDK, reacTIVision and SuperCollider. Collaborative multitouch table
Creating music in movement by interacting with people and architectural objects in realtime. Man'J - creating music in movement
Video shows the Man'J chair prototype with built in Ultrasonic sensor, controlled by Arduino board, Krestianstvo SDK and Supercollider.
Realization on the base of: Strelka: Institute for Media Architecture and Design (Russia, Moscow)
This video is from the "Virtual Museum of Geomtery" opening event, where the new Collaborative Curved Space Explorer version was showed. One could find more about Krestianstvo SDK and [Collaborative Curved Space](http://nsuslovi.blogspot.com/2009/12/collaborative-curved-space-explorer-v10.html) Virtual museum of curved spaces in 3D
It is pure Open Source project, so that everybody could try it by themselves, after downloading the SDK. This video shows, how Collaborative Curved Space Explorer works with Flat, Hyperbolic and Spherical spaces in multi-user mode being installed on the one shared replicated virtual world (island).
Art installation "A.Ivanov. Bible sketches" 
Art installation "A.Ivanov Bible sketches" was held at Russia State Tretyakov Gallery.
In the art installation I tried to connect the real space of 3 walls with its virtual projections in 3D. All installation is rendered by 3 computers (one per wall) connected in network with running Smalltalk Croquet/Krestianstvo image on every machine (scalable to any number of walls/projections).
So the artist gets the full featured connected virtual/real space to manipulate with. For example: it is easy to model the real world scene lightning ( transitions and effects with color, moving the computer generated light source in the space of real walls); geometry transformations (dividing, adding new virtual walls); projecting video/3d animations/images synchronously; and so on.
Multimedia CD on Art "A.Ivanov. Watercolor.Graphics. Bible sketches" 
Multimedia CD on art "A.Ivanov Watercolor. Graphics. Bible sketches" was published at Russia State Tretyakov Gallery.
The software for the disc was developed entirely on Smalltalk Squeak and heavily uses Seaside, Pier and Magritte meta-model.
It partly represents a complete Squeak app, that runs from CD-ROM without install, as user is needed to run the portable Web Browser for working with GUI.
The disc allows to work with the content as one or an unlimited number of users simultaneously through a local network or the Internet; create annotations for works, create new albums and save them directly in the disk structure; there is built-in full-text search support. The disk does not require installation, it starts from CD-Rom or portable media and works by analogy with a Web server / object-oriented database.
Multimedia CD on Art - "Whistler and Russia" 
Multimedia CD on art "Whistler and Russia" was published at Russia State Tretyakov Gallery.
The software for the disc was developed entirely on Smalltalk Squeak/Tweak and heavily uses Sophie's XUL programming interface for GUI.
It represents a complete Squeak app, that runs from CD-ROM without install.
Screenshots from the disc.
At the same time, there were experiments on building the same disc based on collaborative virtual 3D environment - Croquet SDK.