Regenerating database technique for the real-time creation and maintenance of very large scale databases

Virtual reality systems have dealt with relatively sparse datasets for their operation in the representation of real world situations. This lack of detail in the definition and presentation of the modelled environment to the user, can constitute a serious loss in accurately bring across the correct impression of the situation. This deficiency can be put down to two reasons: the inability of modelling systems to conveniently capture large quantities of information about a real situation; and the inability of the target presentation systems to render large volumes of model information sufficiently quickly to cope with a real-time display requirement. A combination of techniques are used to generate model information automatically. In essence, a specification and a set of rules is supplied to the generation engine describing in loose detail the nature of the scene to be represented. These rules are then used in combination with various algorithms to produce the desired effect. The authors discuss the regeneration of database techniques for creation and maintenance of large models