High performance rendering of large scale linear features through virtual connection and best line length selection

  • Authors:

  • Guo Gang;Wang Quan-min;Liu Bao-hong;Yao Xin-yu;Wang Yu-hui;Zhao Xin-jun

  • Affiliations:

  • National University of Defense Technology of China;National University of Defense Technology, Changsha, China;National University of Defense Technology, Changsha, China;National University of Defense Technology, Changsha, China;National University of Defense Technology, Changsha, China;National Key Laboratory of Science and Technology on Complex Systems Simulation, Beijing, China

  • Venue:
  • Proceedings of the 2011 Summer Computer Simulation Conference
  • Year:
  • 2011

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Abstract

Linear features represent a large category of physical or abstract features that overlay on terrain surface. The essential requirement of rendering large scale linear features is to render the vector data on the terrain surface properly, rapidly and dynamically with the balance of data capacity, rendering capacity, visual effect and rendering performance. Derived from the fact that the average rendering time per point varies with the line length, a geometry-based approach is proposed through virtual connections and best line length selection to achieve high performance for rendering of large scale linear features. The best line length of 50000 points is suggested for most applications based on the results of experiments conducted on ordinary personal computers. The average rendering time per point and the frame rate are measured to verify the correctness of the algorithm and the efficiency of the proposed approach. From the results of the experiments, it proves that the average rendering time per point is reduced to 25% or less against the original method and the proposed approach is efficient, simple and suitable for high performance rendering of large scale linear features.