Information
- Publication Type: Technical Report
- Workgroup(s)/Project(s): not specified
- Date: January 2001
- Number: TR-186-2-01-02
- Keywords: hardware accelerated rendering, real-time rendering, visibility, occlusion culling
Abstract
We present a new conservative image-based occlusion culling method to increase the speed of hardware accelerated rendering of very complex general scenes which may consist of millions of polygons without time-expensive preprocessing. The method is based on a low-resolution grid upon a conventional z-buffer or an occlusion-buffer. This grid is updated in a lazy manner which reduces the number of expensive occlusion queries at pixel-level significantly compared to a busy update. It allows fast decisions if an object is occluded or potentially visible. The grid is used together with a bounding volume hierarchy that is traversed in a front to back order and which allows to cull large parts of the scene at once. We show that the method works efficiently on today´s available hardware and we compare lazy and busy updates.Additional Files and Images
Weblinks
No further information available.BibTeX
@techreport{Hey-2001-ReaX, title = "Real-Time Occlusion Culling With A Lazy Occlusion Grid", author = "Heinrich Hey and Robert F. Tobler and Werner Purgathofer", year = "2001", abstract = "We present a new conservative image-based occlusion culling method to increase the speed of hardware accelerated rendering of very complex general scenes which may consist of millions of polygons without time-expensive preprocessing. The method is based on a low-resolution grid upon a conventional z-buffer or an occlusion-buffer. This grid is updated in a lazy manner which reduces the number of expensive occlusion queries at pixel-level significantly compared to a busy update. It allows fast decisions if an object is occluded or potentially visible. The grid is used together with a bounding volume hierarchy that is traversed in a front to back order and which allows to cull large parts of the scene at once. We show that the method works efficiently on today´s available hardware and we compare lazy and busy updates.", month = jan, number = "TR-186-2-01-02", address = "Favoritenstrasse 9-11/E193-02, A-1040 Vienna, Austria", institution = "Institute of Computer Graphics and Algorithms, Vienna University of Technology ", note = "human contact: technical-report@cg.tuwien.ac.at", keywords = "hardware accelerated rendering, real-time rendering, visibility, occlusion culling", URL = "https://www.cg.tuwien.ac.at/research/publications/2001/Hey-2001-ReaX/", }