Debattista, Kurt, Dubla, P., Banterle, Francesco, Santos, L. P. and Chalmers, Alan. (2009) Instant caching for interactive global illumination. Computer Graphics Forum, Vol.28 (No.8). pp. 2216-2228. ISSN 0167-7055

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Abstract

The ability to interactively render dynamic scenes with global illumination is one of the main challenges in computer graphics. The improvement in performance of interactive ray tracing brought about by significant advances in hardware and careful exploitation of coherence has rendered the potential of interactive global illumination a reality. However, the simulation of complex light transport phenomena, such as diffuse interreflections, is still quite costly to compute in real time. In this paper we present a caching scheme, termed Instant Caching, based on a combination of irradiance caching and instant radiosity. By reutilising calculations from neighbouring computations this results in a speedup over previous instant radiosity-based approaches. Additionally, temporal coherence is exploited by identifying which computations have been invalidated due to geometric transformations and updating only those paths. The exploitation of spatial and temporal coherence allows us to achieve superior frame rates for interactive global illumination within dynamic scenes, without any precomputation or quality loss when compared to previous methods; handling of lighting and material changes are also demonstrated.

Item Type:	Journal Article
Subjects:	Q Science > QA Mathematics > QA76 Electronic computers. Computer science. Computer software
Divisions:	Faculty of Science > WMG (Formerly the Warwick Manufacturing Group)
Journal or Publication Title:	Computer Graphics Forum
Publisher:	Wiley-Blackwell Publishing, Inc.
ISSN:	0167-7055
Official Date:	2009
Volume:	Vol.28
Number:	No.8
Number of Pages:	13
Page Range:	pp. 2216-2228
Identification Number:	10.1111/j.1467-8659.2009.01435.x
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
Funder:	PT-FCT, UK-EPSRC
Grant number:	PTDC/EIA/65965/2006, EP/D069874/2
URI:	http://wrap.warwick.ac.uk/id/eprint/16818

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