Istituto di Scienza e Tecnologie dell'Informazione     
Cignoni P., Ganovelli F., Gobbetti E., Marton F., Ponchio F., Scopigno R. Planet-sized Batched Dynamic Adaptive Meshes (P-BDAM). In: VIS 2003 - IEEE Visualization 2003 (Seattle, Washington, 19-24 October 2003). Proceedings, pp. 147 - 155. Greg Turk, Jarke J. van Wijk and Robert Moorhead (eds.). IEEE, 2003.
This paper describes an efficient technique for out-of-core management and interactive rendering of planet sized textured terrain surfaces. The technique, called P-Batched Dynamic Adaptive Meshes (P-BDAM), is based on BDAM structure. Data is partitioned into a set of BDAM tiles, each of them constituted by a pair of geometry bintrees of small triangular patches and an associated texture quadtree. Each triangular patch is a general triangulation of points on a displaced triangle. The proposed framework introduces several advances with respect to the state of the art: thanks to a batched host-to-graphics communication model, we outperform current adaptive tessellation solutions in terms of rendering speed; we guarantee overall geometric continuity, exploiting programmable graphics hardware to cope with the accuracy issues introduced by single precision floating points; we exploit a compressed out of core representation and speculative prefetching for hiding disk latency during rendering of out-of-core data; we efficiently construct high quality simplified representations with a novel distributed out of core simplification algorithm working on a standard PC network.
URL: http://ieeexplore.ieee.org/Xplore/DynWel.jsp
Subject computer graphics
I.3.6 Computer Graphics. Picture and Image Generation
I.3.7 Computer Graphics. Three.Dimensional Graphics and Realism

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