Hierarchical Model

A hierarchical model is formed when several smaller models are joined together as one object, connecting together in a hierarchy, with one of the smaller models taking up the zero axis position in model space of the new, combined model.

Avatars are a perfect example of hierarchical models. Each piece is often created separately, then joined together. Typically the root node is the torso or the head, then limbs are joined on, hands and feet added to the limbs, fingers to the hands, and so on. Each piece references the model it connects to, but the whole assembly exists in a single model space.

Below, we offer a selection of links from our resource databases which may match this term.

Hierarchical Model Kinematic Chain

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Enabling Player-Created Online Worlds with Grid Computing and Streaming
The most popular model for modern MMOs is the shard model - small clusters of servers, each running a separate copy of the world, and each world mostly static. To have a truly dynamic world, with content galore, and experience without end, you need a different model. You need a single world, spread across countless servers...

A Fourth Economy
In less than 20 years, the service economy is being replaced with a new model, the 'Experience Economy', a model in which, whilst there is still a place for services, they are not the main act of the economy. Instead, what is is the provision of experiences, memes, sensory indulgances, and a deeply personal and individual type of service.

Multiple Sensory Modalities Proven to Reinforce Each Other
Usually when we think of sensory input channels - sight, sound, touch, taste, smell, balance - we think of the traditional hierarchical order, under the brain. It seems that that hierarchy is not as cut and dried as we once thought, with interesting implications for virtual worlds.

University of Calgary Unveils the CAVEman Virtual Human
Scientists at the University of Calgary have created the world?s first complete object-oriented computer model of a human body. Far superior to a series of slides, or a textbook, the model is codenamed CAVEman. CAVEman is four-dimensional, as opposed to three, because he can move, as opposed to being static. He can interact with those studying him.

Networked Virtual Environments: Design and Implementation

At the time of publication, it was the best book on the subject of networking real-time, multiple user, persistent environments. Although it is still on the market today, the problem is, it is almost hopelessly dated, still insisting on a hierarchical architecture, which was perfect at the time, but just cannot cope with large worlds today.

Virtual World Exchange Language
The virtual worlds of today are essentially hierarchical systems. A small number of servers which hold the data for the worlds, and an innumerable number of client connections, largely untrusted. This resource, half article/half rant, looks at the virtual worlds of tomorrow; at distributed systems, and world browsers.

Populating Ghostville: Getting and Keeping Players, Part 1
Using the LARP model as an example, this article offers three paradigms for advertising your world, along with a detailed analysis of the benefits and the likelihood of attraction.

VR Cultural Icons > Joe 90
Joe 90 was a 1968 Supermarionation creation of Gerry and Sylvia Anderson. Basically the same people who made Thunderbirds, using the same puppetry and radio controlled model technology. It was also the last supermarionation production.

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