地质二维矢量点符号的自动三维建模

针对传统的三维点符号库实现方法工作量大、扩展性差等问题,提出了直接从二维矢量点符号到三维点符号的自动建模方案。采用三维图元的设计思路,解决符号扩展性差的问题。借鉴二维矢量点符号的表达,来进行三维符号的设计与建模,是对二维符号库的资源再利用,有利于实现二三维符号库的统一。通过设计内存池及内存拷贝的优化策略来提高模型的可视化效率。实验结果表明,提出的方案不仅有较好的可视化效果,并且具有相关文件数据量小、符号的可扩展性好等优势,对三维GIS的符号库研究具有重要的参考价值。

Automatic 3D modeling based on geological 2D vector point symbol

Aiming at the problems of heavy workload and poor scalability on traditional 3D point symbol library implementation solution,this paper proposed a method to automatically construct symbols from 2D form to 3D directly.By designing 3D primitive,the problem of poor scalability is solved.Referring to the expression of 2D vector point symbol,the 3D symbol is designed and modeled.It is the reuse of 2D symbol library resource and contributes to the unified management of 2D and 3D symbol library.Through the design of memory pool and memory copy optimization strategy to improve the visualization efficiency.The experimental result shows that the proposed scheme not only has a good visual effect,but also smaller data,good scalability.It is of great reference value to the research of 3D symbol library.