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Erschienen in:
1999 | OriginalPaper | Buchkapitel
Fast Walkthroughs with Image Caches and Ray Casting
verfasst von : Michael Wimmer, Markus Giegl, Dieter Schmalstieg
Erschienen in: Virtual Environments ’99
Verlag: Springer Vienna
Enthalten in: Professional Book Archive
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We present an output-sensitive rendering algorithm for accelerating walkthroughs of large, densely occluded virtual environments using a multistage Image Based Rendering Pipeline. In the first stage, objects within a certain distance are rendered using the traditional graphics pipeline, whereas the remaining scene is rendered by a pixel-based approach using an Image Cache, horizon estimation to avoid calculating sky pixels, and finally, ray casting. The time complexity of this approach does not depend on the total number of primitives in the scene. We have measured speedups of up to one order of magnitude.