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Computer Graphics Forum
Volume22, Issue 3 (September 2003)
Authors:
P. Cignoni
§ISTI CNR via Moruzzi 1, 56100 Pisa, Italy, email: {lastname}@isti.cnr.it
F. Ganovelli
§ISTI CNR via Moruzzi 1, 56100 Pisa, Italy, email: {lastname}@isti.cnr.it
E. Gobbetti
‡CRS4, VI Strada OVEST Z.I. Macchiareddu, C.P. 94, 09010 UTA (CA - Italy) email: {lastname}@crs4.it
F. Marton
‡CRS4, VI Strada OVEST Z.I. Macchiareddu, C.P. 94, 09010 UTA (CA - Italy) email: {lastname}@crs4.it
F. Ponchio
§ISTI CNR via Moruzzi 1, 56100 Pisa, Italy, email: {lastname}@isti.cnr.it
R. Scopigno
§ISTI CNR via Moruzzi 1, 56100 Pisa, Italy, email: {lastname}@isti.cnr.it
Summary:
This paper describes an efficient technique for out-of-core rendering and management of large textured terrainsurfaces. The technique, called Batched Dynamic Adaptive Meshes (BDAM), is based on a paired tree structure:a tiled quadtree for texture data and a pair of bintrees of small triangular patches for the geometry. These smallpatches are TINs and are constructed and optimized off-line with high quality simplification and tristrippingalgorithms. Hierarchical view frustum culling and view-dependent texture and geometry refinement is performedat each frame through a stateless traversal algorithm. Thanks to the batched CPU/GPU communication model,the proposed technique is not processor intensive and fully harnesses the power of current graphics hardware.Both preprocessing and rendering exploit out-of-core techniques to be fully scalable and to manage large terraindatasets.
Categories and Subject Descriptors (according to ACM CCS): I.3.3 [Computer Graphics]: Picture and Image Generation;I.3.7 [Computer Graphics]: Three-Dimensional Graphics and Realism.