View-dependent Progressive-mesh Terrain Browsing with Dynamic Loading

• Main Authors: Chung-chieh Huang, 黃崇杰
• Other Authors: Din-Chang Tseng
• Format: Others
• Language: en_US
• Published: 1999
• Online Access: http://ndltd.ncl.edu.tw/handle/05720200392019729424

碩士 === 國立中央大學 === 資訊工程研究所 === 87 === In this paper, a study of view-dependent terrain modeling based on the progressive mesh (PM) with dynamic loading technique is proposed. The view-dependent progressive mesh is a multiresolution modeling method in which a triangle mesh can be selectively refined according to the view parameters. For a large-scaled terrain mesh, constructing the PM representation is very time-consuming; moreover, it is generally impractical to load the whole PM structure into memory. In this study, we partition a large-scaled terrain mesh into blocks and then dynamically load the necessary terrain blocks for browsing. In addition, several improvements on the approach are also proposed, which are: (i) exact view-frustum calculation, (ii) detecting and resolving the “fold-back” problems, and (iii) solving the boundary vertex matching problems of adjacent terrain blocks in dynamic loading.