Browse > Article
http://dx.doi.org/10.7583/JKGS.2011.11.1.131

Terrain Rendering Using Vertex Cohesion Map  

Jo, In-Woo (Dept. of Computer Science and Information Engineering, Inha University)
Lee, Eun-Seok (Dept. of Computer Science and Information Engineering, Inha University)
Shin, Byeong-Seok (Dept. of Computer Science and Information Engineering, Inha University)
Publication Information
Journal of Korea Game Society / v.11, no.1, 2011 , pp. 131-138 More about this Journal
Abstract
Recently in terrain rendeing, most researches introduce mipmap-based out-of-core methods for handling large sized DEM data which does not fit in main memory of general computer. However, mipmap-based LOD(level-of-detail) methods occur geometric errors which appear in data simplifying the higher LOD level. These geometric errors cause geometric popping effects where LOD level changes when viewpoint moves. In this paper, we propose vertex cohesion map for reducing geometric error. In preprocessing step, we generate vertex cohesion map, which is a texture that stores the vectors. By these vectors, each vertex will be cohered into the position in which the difference of gradient value is bigger than others. Therefore in terrain rendering, using vertex cohesion map can dramatically reduce the geometry popping effects rather than using mipmap.
Keywords
Terrain; Real-time rendering; Level Of Detail;
Citations & Related Records
연도 인용수 순위
  • Reference
1 M. Duchaineau, M. Wolinsky, D. Sigeti, M. Miller, C. Aldrich, M. Mineev-Weinstein, "ROAMing terrain: real-time optimally adapting meshes", Proceedings of Visualization 97, pp. 81-88 ,1997.
2 T. Ulrich, "Rendering massive terrains using chunked level of detail control", SIGGRAPH 2002 Course Notes, 2002.
3 C. Dachsbacher, M. Stamminger, "Rendering Procedural Terrain by Geometry Image Warping", Proceedings of Eurographics Symposium on Rendering, pp. 103-110, 2004
4 J. Peter-Pike, P. Sloan, D. M. Weinstein, J. D. Brederson, "Importance Driven Texture Coordinate Optimization", Computer Graphics Forum, Vol. 17, No. 3, pp. 97-104, 1998   DOI   ScienceOn
5 D. Marr, H. Hildreth, "Theory of edge detection", Proceedings of the Royal Society of London, Vol. B207, pp. 187-217, 1980.
6 P. Lindstrom, D. Koller, W. Ribarsky, L. Hodges, N. Faust, G. Turner, "Real-time, Continuous Level-of-Detail Rendering of Height Fields", Proceedings of ACM SIGGRAPH 96, pp. 109-118, 1996.
7 F. Losasso, H. Hoppe, "Geometry Clipmaps: Terrain Rendering Using Nested Regular Grids", Proceedings of SIGGRAPH 2004, Vol. 23, pp. 769-776, 2004
8 C. Tanner, C. Migdal, M. Jones, "The clipmap: A Virtual Mipmap.", Proceedings of the 25th annual conference on Computer graphics and interactive techniques, pp. 151-158, 1998
9 Y. Livny, N. Sokolovsky, T. Grinshpoun, J. El-Sana, "A GPU persistent grid mapping for terrain rendering", The Visual Computer 24, pp. 139-153, 2008   DOI   ScienceOn