Zonja Capalini

Grider: Prototypying the next generation Hypergrid


I’ve already blogged (here and here) about hypergrid, a virtual world architecture that allows the federation of Opensim grids (or “worlds”), and in particular teleports between grids. Using hypergrid, you can teleport, for example, from OSGrid to my grid, the Condensation Land Grid, or between OSGrid and Sciencesim, or between Sciencesim and the Cyberlandia grid, etc. Wagner James Au reported in the New World Notes blog about a demo run by Tom Murphy at the Metaverse University in which hypergrid teleports were shown between grids located in different parts of the US. Hypergrid is developing very fast, and once it’s stabilized and distributed widely, it will implement the vision of a world-wide network of connected grids, where big corporate or educational grids will coexist with small, home-based grids. And thanks to the hypergrid teleport, all these grids will appear as a single world like Second Life is today — hence the name “hypergrid” :-)

Here’s a sample video showing hypergrid teleports in action:

In this article I’ll discuss some details of the current hypergrid architecture, some of the security risks involved, and how a new, more secure hypergrid architecture (sometimes called “safe hypergrid” or “hypergrid 2”) is being developed.

Continue reading


June 10, 2009 Posted by | OpenSim, SL Exodus, Tech News | , , | 12 Comments

Hypergrid, or how to teleport between WORLDS using OpenSim

[Update 20090106: Corrected information about names after hypergrid tp, added two captures]


This post presents a user experience with Hypergrid, a technology included in OpenSim that allows teleports between virtual worlds (or grids), and includes also a short tutorial so that you can try it yourself, link your virtual world with your friends’ worlds, etc. It assumes a minimal working knowledge of OpenSim, at the level described in my previous post. Yes, yes, I know, after a “Installing OpenSim” post there should come another titled “Saving our database” or “Our first Grid” — but I’m doing that for fun, ok? :-)

Why Hypergrid matters

Hypergrid represents a radical change in the model for 3D online OpenSim-compatible virtual worlds. Up to now, we’ve been used to big, monolithic worlds (like Second Life or OSGrid), modelled under the metaphor of a flat, grid-like world (hence the term grid). The world is made of pieces called islands or regions which occupy a place in the grid determined by two integer coordinates, and these in turn determine the visibility between islands. Thus, if island A is at (1000,1000) and island B is at (1001,1000), A and B share a border: the east of A is the west of B.

This “big world” model has several problems: big worlds don’t scale well, the data is in the hands of the service provider, not the customer, and it’s easy to for the service providers to scam their customers. Besides, if OpenSim has to become the 3D web, one doesn’t understand clearly why having some islands (= having a web) should imply having neighbours or occupying a position in a vaster plane — there’s no notion of “neighbour web” in the WWW.

Enter HyperGrid. HyperGrid allows us to work with a completely different model, what we could call a “small world” model. Everybody can have a world, a grid, in the same way that everybody can have a web. You, your community, your employer, whomever. And, as webs are linked using HTTP links, so grids are linked using HyperGrid. Easy, no?

Therefore HyperGrid matters. Indeed, it matters a lot. A hypergrided universe is a universe in which you can have your own world, take your own backups, create your own contents and save it to your HD, invite your friends… and still not be isolated.

To be fair, the technology has its problems. For example, DRM as we know it today cannot work, and there also are some security concerns. Anyway, these problems will most probably be tackled, one way or another.
Continue reading

January 5, 2009 Posted by | OpenSim, SL Exodus, Tutorials | , , | 12 Comments