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 20 April 9, 2007 Real-time Rendering & Graphics Hardware Pradeep Sen Class 20 – April 9, 2007 Announcements I will speak at this week’s GFX Café Capturing light fields and refocusing images Real-time Rendering & Graphics Hardware Pradeep Sen Class 20 – April 9, 2007 Last time Advanced topics on Precomputed Radiance Transfer (PRT) Real-time Rendering & Graphics Hardware Pradeep Sen Class 20 – April 9, 2007 Today Real-time geometrical models Level of detail Real-time Rendering & Graphics Hardware Pradeep Sen Class 20 – April 9, 2007 Sources of 3-D data Typing in the geometric representation Writing a program to generate this data Output from a modeling program Sampling a real model at various points using a 3-D digitizer Reconstruction from photographs of an object (photogrammetry) Using a 3-D scanner which gathers depth info Real-time Rendering & Graphics Hardware Pradeep Sen Class 20 – April 9, 2007 Point clouds Scanners give us point clouds, we need to tesselate them in order to get triangular meshes we can render Images courtesy of Hugues Hoppe point cloud high-res triangular mesh simplified triangular mesh Real-time Rendering & Graphics Hardware Pradeep Sen Class 20 – April 9, 2007 Triangulation or tesselation Real-time Rendering & Graphics Hardware Pradeep Sen Class 20 – April 9, 2007 Delaunay Triangulation Triangulation of set of points P such that no point in P is inside the circumcircle of any triangle in the triangulation Delaunay triangulation maximizes the minimum
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