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Terms from Computer Graphics |
Virtual Worlds ] |
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Virtual RealityVirtual Reality is a reality near description of 3D worlds under
consideration of interactive visiting by the user. Amongst visual descriptions
like geometry, material a.o. physical properties belong to a definition of a
virtual world. The following terms explain the steps from a 3D scene to virtual
reality. |
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3D Model: |
Internal Computer-representation of objects by geometry and attributes. | |
3D Scene: |
3D-Model including material, lightning, environmental description and camera definitions. | |
3D World: |
Interactive viewable 3D scene with simulation functionality. | |
Computer Graphic: |
Computation of a raster graphic image base on mathematical descriptions of a 3D model or a 3D scene. | |
From 3D models, 3D scenes or 3D worlds one can compute computer graphics, animations or models with free navigation facilities. |
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Animation: |
Computation of a sequence of raster graphic images considering
the changing of model and scene description parameters such as topology,
geometry, lightning and viewpoint behavior. |
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Introduction of VRML The construction process of virtual worlds is supported by the
description language VRML (Virtual Reality Modeling Language). Elements of the
language include geometry, appearance, light sources, environment descriptions,
animations, interactivity and sound.
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Interaction of the VisitorThe VRML browser reads the file, parses through the file, builds the virtual world an renders the world in a viewport of the Web site.The browser provide a user interface for navigation through the virtual world. One can walk through the world, fly over the scene or can inspect the object. Listen to sound and interacting with the contents is possible as well. For rendering the browsers benefit from graphic tools like Open GL or Direct3D. |
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You need a plug-in to visit the virtual world example on the next page. Use the graphic link left for installation. Then continue to the virtual world ..... | ||