VRML Scene Graphs on an Interactive Ray Tracing Engine

Authors:
Andreas Dietrich;Ingo Wald;Markus Wagner;Philipp Slusallek
Affiliations:
Saarland University, Germany;Saarland University, Germany;Saarland University, Germany;Saarland University, Germany
Venue:
VR '04 Proceedings of the IEEE Virtual Reality 2004
Year:
2004

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Abstract

With the recent advances in ray tracing technology, high-qualityimage generation at interactive rates has finally becomea reality. As a consequence ray tracing will likely playa larger role in visualization systems, enabling the conceptionand creation of completely new interactive graphics applications.In this paper we describe the design and development ofa ray tracing-based VRML browser and editor as a casestudy of such an application. It exploits all advantagesof ray tracing, including physically-correct plug and playshading and support for large models.In particular we demonstrate how to overcome the limitationsthat result from existing scene graph libraries anddata exchange formats still being targeted towards rasterizationtechnology. Also we show how to extend the VRMLlighting model and to optimize scene graph handling for ray tracing.