1,076 research outputs found
vrmlgen: An R Package for 3D Data Visualization on the Web
The 3-dimensional representation and inspection of complex data is a frequently used strategy in many data analysis domains. Existing data mining software often lacks functionality that would enable users to explore 3D data interactively, especially if one wishes to make dynamic graphical representations directly viewable on the web. In this paper we present vrmlgen, a software package for the statistical programming language R to create 3D data visualizations in web formats like the Virtual Reality Markup Language (VRML) and LiveGraphics3D. vrmlgen can be used to generate 3D charts and bar plots, scatter plots with density estimation contour surfaces, and visualizations of height maps, 3D object models and parametric functions. For greater flexibility, the user can also access low-level plotting methods through a unified interface and freely group different function calls together to create new higher-level plotting methods. Additionally, we present a web tool allowing users to visualize 3D data online and test some of vrmlgen's features without the need to install any software on their computer.
An Approach to (Virtually) Recreate Historical Findings
Comunicação apresentada no 10th International Congress "Cultural Heritage and New Technologies"The use of technologies in the preservation and dissemination of the Humanity historical and cultural
heritage has become an increasing reality. However, access to some of these projects, namely those
involving the use of Virtual Reality techniques, is often rather restricted and limited due to technical
specificities used in its development and/or visualization. Availability to the general public, for instance
through the Internet, becomes, then, impracticable.
VRML (Virtual Reality Modeling Language) emerged from the desire to project World Wide Web to a
new level, the three-dimensional level. However, even though there are not many alternatives, VRML is not
used often. In fact, the number of projects available that use this language is lower than expected. Why?
Generally the development of realistic VRML environments results in a set of big files that difficult its
download. The complex calculations often necessary to display the virtual environment also create
difficulties, since they demand too much for low end computers.
This paper intends to present some VRML optimization techniques that allow the creation of a very low
file size and a realistic historical environment that can be accessed from any current personal computer.
As a result, you can make your own historical tour at:
• The Flavian Forum of Conimbriga: http://www.forumflaviano.web.pt
• House of Skeletons (Conimbriga): http://www.casadosesqueletos.web.p
Analysis domain model for shared virtual environments
The field of shared virtual environments, which also
encompasses online games and social 3D environments, has a
system landscape consisting of multiple solutions that share great functional overlap. However, there is little system interoperability between the different solutions. A shared virtual environment has an associated problem domain that is highly complex raising difficult challenges to the development process, starting with the architectural design of the underlying system. This paper has two main contributions. The first contribution is a broad domain analysis of shared virtual environments, which enables developers to have a better understanding of the whole rather than the part(s). The second contribution is a reference domain model for discussing and describing solutions - the Analysis Domain Model
Perception of space through representation media: a comparison between 2D representation techniques and 3D virtual environments
Thesis (Master)--Ä°zmir Institute of Technology, Architecture, Ä°zmir, 2005Includes bibliographical references (leaves: 109-113)Text in English; Abstract: Turkish and Englishxii, 122 leavesFor centuries, 2D drawing techniques such as plans, sections and elevations have been the main communication media for the profession of architecture. Addition to these techniques, for two decades, computer based representation techniques and 3D virtual environments (VE) have also entered to the profession of architecture. Effects of these computer based techniques on perception of space have always been interrogated by several researches.Although these researches generally regarded these computerized techniques as better and proper than conventional techniques, in some cases conventional techniques can be more effective to depict architectural space. Main aim of this thesis is to compare and evaluate the positive effects and shortcomings of 3D virtual environments and 2D conventional representation techniques in the context of perception of architectural space. Parallel to this objective, the thesis also aims to show the differentiation in perception of space with the change of representation media. To show these differences, a comparative method is used. As the main step of the application of this method, an experimental case study and survey has been constituted for comparing 2D conventional techniques and 3D computer based techniques. In this survey, 38 first yearstudents from Izmir Institute of technology have taken place as test subject.According to the results of this comparative case study, contributions and shortcomings of 2D conventional representation techniques and 3D computer based techniques on improving the capability of architects on perception of the space have been determined
The Effects of Task, Task Mapping, and Layout Space on User Performance in Information-Rich Virtual Environments
How should abstract information be displayed in Information-Rich Virtual Environments (IRVEs)? There are a variety of techniques available, and it is important to determine which techniques help foster a user’s understanding both within and between abstract and spatial information types. Our evaluation compared two such techniques: Object Space and Display Space. Users strongly prefer Display Space over Object Space, and those who use Display Space may perform better. Display Space was faster and more accurate than Object Space for tasks comparing abstract information. Object Space was more accurate for comparisons of spatial information. These results suggest that for abstract criteria, visibility is a more important requirement than perceptual coupling by depth and association cues. They also support the value of perceptual coupling for tasks with spatial criteria
The addition of the haptic modality to the virtual reality modeling language
Thesis (S.B. and M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1998.Includes bibliographical references (p. 40-43).by Evan F. Wies.S.B.and M.Eng
A CAD-based modeling for dynamic visualization of urban environments in piecemeal (incremental) growth
Thesis (Master)--Izmir Institute of Technology, City and Regional Planning, Izmir, 2002Includes bibliographical references (leaves: 114-122)Text in English; Abstract: Turkish and Englishxi, 122 leavesVisualization is inherent to the conduct of urban design as a direct connection between the designer and three dimensional reality of urban settlements. Visualization of urban environments and urban design projects is vital, since most designers prefer to understand place and context through visualization. The reasons for visualization in urban design can be classified under three headings: .visual thinking, design communication and testing mechanism. Digital revolution. has improved computer use in urban design, as in many other fields. Dynamic computer models can present an ideal environment to visualize the change in respect to time. Digital tools are much more efficient than conventional methods in explaining the growth and change of urban environments. Especially, incremental growth requires features not found in .static/analog. media. Christopher Alexander and his colleagues, in their book .A New Theory of Urban Design., tried to justify their ideas about piecemeal growth by an experiment. The analog methods, such as physical models, two-dimensional diagrams, have been used to conduct the experiment and to convey their ideas about the design process. This thesis tries to produce a .dynamic/digital. model that could be utilized in their experiment instead of static/analog methods. Spatial data should be considered as dynamic, or changing identities rather than as simple, static features. Time is an example of a dynamic component of a spatial data set. Recent technological developments are increasing computer hardware and software capabilities so that this dynamic aspect of data can be accounted for by today.s systems. Dynamic data have not been a great concern in digital technologies for many years, but today changing patterns and dimensions are becoming more important
Exploring 3D Chemical Plant Using VRML
The research project focused on how virtual reality could create an immersive
environment and improve in designing a chemical plant. The main problem is the
difficulties in designing chemical plant since 2D plant layout cannot provide the
real walking-through. The aim of this project is to develop and design 3D
Chemical Plant which allows users to explore the virtual plant environment
freely. The objectives of this project are to design and develop 3D Chemical
Plant in the virtual environment; to enable user to walkthrough the chemical
plant; and at the same time evaluate the effectiveness of the implementation of
3D Chemical Plant. In completion the project, the framework used is based on
the waterfall modeling theory. This study also examines the structure and
existing use of VRML (International standard for 3D modelling on the internet)
in constmction and architectural practice as a means of investigating its role and
potential for extensible construction information visualization in chemical plant.
The phases involved in the framework used for project development is the
initiation phase, design specification, project development, integration and
testing and lastly project implementation. Developments tools have been used in
the project are VRML and 3D Max 6. As a result from the evaluation conducted,
the mean of 3.5 from level of satisfaction ranking shows that mostly the
evaluators are satisfied with the project and feel that the realism of 3D chemical
plant and suitability of color and textures will improve the designing of chemical
plant in virtual environment. As conclusion, the research project show that
VR!VE are very useful and give a good impact for the chemical Engineer in
designing a chemical plant
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