Object-oriented 3D Modelling, Animation and Interaction

Döllner, Jürgen; Hinrichs, Klaus

doi:10.1002/(sici)1099-1778(199701)8:1<33::aid-vis153>3.0.co;2-z

Cited by 21 publications

(2 citation statements)

References 20 publications

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“…According to Döllner and Hinrichsthe, 36 behavioral modeling is considered as important as geometric modeling because the specification of time-varying and event-dependent properties is the key for animation and interaction control. Hence, regarding map functions development it would be interesting to test an objectoriented framework aimed at modeling behaviors and geometry at the same level, such as VRS.…”

Section: Figurementioning

confidence: 99%

A temporal focus + context visualization model for handling valid-time spatial information

Carvalho

Sousa

Ribeiro

et al. 2008

Information Visualization

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Spatiotemporal databases provide effective means to represent, manage and query information evolving over time. However, the visualization of record sets that result from spatiotemporal queries through traditional visualization techniques can be of difficult interpretation or may lack the ability to meaningfully display several instants at the same time. We propose a Temporal Focus + Context visualization model to overcome issues from such techniques resorting to concepts from Information Visualization. In this model, Focus + Context is applied to time rather than, as more typically, to attributes or space, and allows large amounts of data from distinct periods of time and from several record sets to be compressed onto one. Underlying the proposed visualization technique is the calculation of a temporal degree of interest (TDOI) for each record driven by specific analysis, exploration or presentation goals and based on the record valid time attribute, as well as on user-defined temporal visualization requirements. In the mapping stage of the visualization pipeline, the TDOI for a record is used to control graphical properties, such as transparency and color. More complex rendering properties, such as sketch drawing edges or other non-photorealistic enhancement techniques, can also be used to convey the temporal aspects of data, replacing the original graphical features of the record data. By enhancing or dimming the representation of a data item, according to the corresponding degree of interest, it is possible to meaningfully compress information about distinct temporal states of data onto the same visualization display. The model has been applied to several test scenarios and proved appropriate and useful for a wide range of domains that require the display, exploration and analysis of spatial information discretely evolving over time.

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Section: Figurementioning

confidence: 99%

A temporal focus + context visualization model for handling valid-time spatial information

Carvalho

Sousa

Ribeiro

et al. 2008

Information Visualization

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“…A scenario specifies the behavior of synthetic vehicles, pedestrians, traffic control devices and variations in weather and lighting. In [7] the authors specify separately geometry and behavior in two directed acyclic graphs, the geometry and behavior graphs. In [8] an approach for specifying virtual words is described, The approach is interesting in that it allows for the temporal evolution of objects.…”

Section: Related Workmentioning

confidence: 99%

Stedel: a language for interactive spatio-temporal compositions

Lazaridis

Vazirgiannis

Sellis

2001

IEEE International Conference on Multimedia and Expo, 2001. ICME 2001.

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The two fundamental challenges in Virtual Reality over the WWW are (i) to facilitate the process of creating convincing, non-trivial, highly interactive and maintainable content and (ii) to efficiently deliver this content to the client with QoS guarantees. This paper focuses on the first challenge: we have created a data model for spatio-temporal compositions that allows us to define relative placement of objects in a virtual world by means of their geometric characteristics (Joints). Thus, we model spatial relationships of objects at a higher level of abstraction than simple co-ordinate system transformations. We also define the behavior of objects in a declarative way, by means of Event-Condition-Action rules. Events and Actions can be synthesized by a set of operators for the creation of really complex behavior. Our model has been realized in prototype form in Spatio-Temporal Descriptive Language (STEDEL) that demonstrates the validity and power of our approach in terms of re-usability and authorship effort.

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