An object-oriented 3D graphics toolkit

Strauss, Paul; Carey, Rikk

doi:10.1145/133994.134089

Cited by 192 publications

(57 citation statements)

References 2 publications

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“…The whole system is based on the OpenInventor [ST92] Rendering/Simulation library, which reduces the addition of new functionality to the Studierstube environment to the simple process of adding a new dynamically loadable module. The necessary tracker data is delivered by the Studierstube tracker interface, which delivers positions and orientations in OpenInventor fields, a high-level interface element, which allows easy connections to the separately developed simulation library [FA98].…”

Section: Methodsmentioning

confidence: 99%

Occlusion in collaborative augmented environments

Fuhrmann

Hesina

Fauré

et al. 1999

Computers & Graphics

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Augmented environments superimpose computer enhancements on the real world. Such augmented environments are well suited for collaboration of multiple users. To improve the quality and consistency of the augmentation the occlusion of real objects by computergenerated objects and vice versa has to be implemented. We present methods how this can be done for a tracked user's body and other real objects and how irritating artifacts due to misalignments can be reduced. Our method is based on simulating the occlusion of virtual objects by a representation of the user modeled as kinematic chains of articulated solids. Registration and modeling errors of this model are being reduced by smoothing the border between virtual world and occluding real object. An implementation in our augmented environment and the resulting improvements are presented.

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Section: Methodsmentioning

confidence: 99%

Occlusion in collaborative augmented environments

Fuhrmann

Hesina

Fauré

et al. 1999

Computers & Graphics

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“…The iIsh system is (by its very name -interactive Inventor Shell) based on the Inventor C++ toolkit from Silicon Graphics [14]. Inventor is an object-oriented toolkit that supports the programming of direct manipulation interfaces in the immersive sense -allowing the user to interact directly with the displayed 3D objects in the same window as the display and without having to seek recourse to manipulation widgets.…”

Section: The Contribution Of Graphics Programming Methodologiesmentioning

confidence: 99%

The “No-Paradigm” Programming Paradigm for Information Visualization

Blake

Goosen

1995

Programming Paradigms in Graphics

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We describe our exploratory visualization environment, the interactive Inventor Shell (iIsh), and the fact that no single programming paradigm underlies it. IIsh is an environment for interactive exploration of large databases of multidimensional abstract data, an application known as Information Visualization. This environment has been used in a number of areas but is still evolving -this flexibility is a key feature. IIsh is built around the Tcl scripting language and the Inventor 1 three-dimensional graphics toolkit, and simplifies the creation of interactive threedimensional visualizations of abstract data. A particular feature of iIsh is that the interaction behavior of the system can be easily modified at run-time. We have used iIsh to construct a variety of visualization applications in fields ranging from computer architecture to medical insurance, and we describe our experience.

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“…It builds upon tracking data amongst others given by VRPN and models tracked, statically registered, or deduced spatial relationships in a scene graph [19]. Assumed tracking and registration errors can be propagated along its branches in terms of covariances, thereby providing the application with a measure of the expected tracking accuracy.…”

Section: Related Workmentioning

confidence: 99%

“…SRGs are similar to scene graphs in computer graphics [19]. Yet, in contrast to scene graphs, SRGs do not imply a pre-defined hierarchical ordering of the nodes.…”

Section: Spatial Relationship Graphsmentioning

confidence: 99%

Management of Tracking for Mixed and Augmented Reality Systems

Keitler

Pustka

Huber

et al. 2009

The Engineering of Mixed Reality Systems

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Position and orientation tracking is a major challenge for Mixed / Augmented Reality applications, especially in heterogeneous and wide-area sensor setups. In this article, we describe trackman, a planning and analysis tool which supports the AR-engineer in setup and maintenance of the tracking infrastructure. A new graphical modeling approach based on spatial relationship graphs (SRGs) eases the specification of known as well as the deduction of new relationships between entities in the scene. Modeling is based on reusable patterns representing the underlying sensor drivers or algorithms. Recurring constellations in the scene can be condensed into reusable meta-patterns. The process is further simplified by semiautomatic modeling techniques which automize trivial steps. Dataflow networks can be generated automatically from the SRG and are guaranteed to be semantically correct. Furthermore, generic tools are described that allow for the calibration/registration of static spatial transformations as well as for the live surveillance of tracking accuracy. In summary, this approach reduces tremendously the amount of expert knowledge needed for the administration of tracking setups.

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An object-oriented 3D graphics toolkit

Cited by 192 publications

References 2 publications

Occlusion in collaborative augmented environments

Occlusion in collaborative augmented environments

The “No-Paradigm” Programming Paradigm for Information Visualization

Management of Tracking for Mixed and Augmented Reality Systems

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