Real-Time Rendering (2nd Edition)

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1 ECE 595 / CS 491 / CS 591 Real-Time Rendering & Graphics Hardware Pradeep Sen Advanced Graphics Lab Class 19 April 4, 2007 Real-time Rendering & Graphics Hardware Pradeep Sen Class 19 – April 4, 2007 Announcements GFX Café this Friday will be given by Mike Bispeck on the professional game development process Real-time Rendering & Graphics Hardware Pradeep Sen Class 19 – April 4, 2007 Last time Precomputed Radiance Tranfer Real-time Rendering & Graphics Hardware Pradeep Sen Class 19 – April 4, 2007 Today Advanced topics in precomputed radiance transfer Real-time Rendering & Graphics Hardware Pradeep Sen Class 19 – April 4, 2007 Last time Ng et al. “All-frequency shadows using non- linear wavelet lighting approximation” SIGGRAPH 03 Real-time Rendering & Graphics Hardware Pradeep Sen Class 19 – April 4, 2007 Relighting as a vector-matrix multiplication 1 2 3 N P P P P M 11 12 1 1 21 22 2 2 31 32 3 1 2 M M M N N N NM T T T L T T T L T T T L T T T = L L L M M M O M L Input Lighting (Cubemap Vector) Output Image (Pixel Vector) Transport Matrix slide courtesy Ren Ng Real-time Rendering & Graphics Hardware Pradeep Sen Class 19 – April 4, 2007 Sparse Matrix-Vector Multiplication Choose data representations with mostly zeroes Vector: Use non-linear wavelet approximation on lighting Matrix: Wavelet-encode transport rows 11 12 1 1 21 22 2 2 31 32 3 1 2 M M M N N N NM T T T L T T T L T T T L T T T L L L M M M O M L slide courtesy Ren Ng Real-time Rendering & Graphics Hardware Pradeep Sen Class 19 – April 4, 2007 Non-linear Wavelet Light Approximation Wavelet Transform slide courtesy Ren Ng Real-time Rendering & Graphics Hardware Pradeep Sen Class 19 – April 4, 2007 Non-linear Wavelet Light Approximation Wavelet Transform slide courtesy Ren Ng
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