Autonomic visiting in digital 3D scenes |
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| Authors: | Song Chen Liang Cheng |
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| Institution: | 1.Jiangsu Provincial Key Laboratory of Geographic Information Science and Technology,Nanjing University,Nanjing,People’s Republic of China;2.Department of Geographic Information Science,Nanjing University,Nanjing,People’s Republic of China;3.Collaborative Innovation Center for the South Sea Studies,Nanjing University,Nanjing,China;4.Collaborative Innovation Center of Novel Software Technology and Industrialization,Nanjing University,Nanjing,China;5. Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application,Nanjing,China |
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| Abstract: | Human-machine interactive visiting and fixed-route visiting are currently the main roaming modes in digital three-dimensional (3D) scenes. However, in general, when a person visits an attraction area, s/he does not follow a fixed path, but instead wander about according to his/her interests. Here, we propose a new roaming mode, called autonomic visiting. That is, in a digital 3D scene, a user selects several interest spots, then a route connecting these spots can be automatically determined and 3D scene can be seen along this route. This study presents a technical approach that enables the realization of autonomic visiting in 3D scenes. Firstly, Delaunay triangular meshes for the terrain in 3D scene are established. Secondly, a plane-growth algorithm and a line-connection algorithm are introduced to automatically mend the broken parts of these triangular meshes. Thirdly, the triangular meshes are then merged and differently weighted according to different layers. Finally, a progress-zone transmission algorithm is presented to optimal the shortest route, which is derived from A-Star (A*) algorithm. Digital 3D campus of Nanjing University, China, is taken as the experimental materials. The experimental results prove the effect of the proposed approach. |
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