Journal of Xidian University ›› 2016, Vol. 43 ›› Issue (3): 73-77.doi: 10.3969/j.issn.1001-2400.2016.03.013

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New modeling method for ray tracing

YANG Xin1,2;WEI Bing1,2   

  1. (1. School of Physics and Optoelectronic Engineering, Xidian Univ., Xi'an  710071, China;
    2. Collaborative Innovation Center of Information Sensing and Understanding, Xidian Univ., Xi'an  710071, China)
  • Received:2015-02-20 Online:2016-06-20 Published:2016-07-16
  • Contact: WEI Bing E-mail:bwei@xidian.edu.cn

Abstract:

It is often necessary to divide the spatial domain into grids in the ray tracing method. Based on the unit sphere inscribed icosahedron in this paper, a method of triangulation of the space curved surfaces by dimension reduction calculation is proposed. The process of this method is presented in detail by the triangulation of a unit sphere and two grid numbering schemes are given simultaneously. Then, combined with the direction of the electromagnetic radiation figure, the rays are selected. Finally, the examples of surface triangulation and tube selection are presented, which show the validation and effectiveness of this algorithm.

Key words: ray tracing, dimension reduction, surface meshing, ray selection