JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE) ›› 2016, Vol. 46 ›› Issue (4): 15-20.doi: 10.6040/j.issn.1672-3961.0.2016.028

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Highly efficient algorithm for tracking explicit surface to process complex topological events

HOU Yan1, YANG Meng2   

  1. 1. College of Information Science and Engineering, Qilu Normal University, Jinan 250013, Shandong, China;
    2. Institute of Automation, Chinese Academy of Sciences, Beijing 100190, China
  • Received:2016-01-19 Online:2016-08-20 Published:2016-01-19

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Abstract: A new algorithm was put forth to accurately track the free surface with complex changing topology. This algorithm employed the explicit Lagrangian mesh to model the free surface, used the external velocity field to move the surface mesh and processed the surface geometry by using the local re-meshing techniques, which efficiently eliminated the self-intersection errors. By this algorithm, a voxel grid was used to effectively detect the regions where the topological events occurred. In the regions, the surface meshes were subdivided, the topologically incorrect meshes were replaced by the predefined templates and then an accurate sewing operation was performed to connect the reconstructed local meshes with the external meshes. Ultimately, the experimental results indicated that this algorithm could effectively handle the topological events of the explicit meshes, which was suitable for a liquid animation in the practical applications.

Key words: explicit surface, template, voxel, topology, local reconstruction

CLC Number: 

  • TP391
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