矢量与栅格结合的三维地质模型编辑方法

An Editing Method of 3D Geological Model with the Union of Vector and Grid

三维地质模型主要通过剖面构造·自动建模方法要求这些剖面基本平行,并且相邻剖面地质体的差别不能过大·本文针对剖面数据较少且不平行的情形,设计了人机交互的三维地质模型构造方法,利用普通多面体栅格化算法和由MarchingCubes算法得到的光栅矢量化,实现了光栅和矢量模型的相互转换·在保证模型间拓扑正确的基础上,提高了地质模型的编辑效率,并在实践中得到了检验·

Presently the 3D geological model is constructed mainly from sections. Automatic methods usually demand that the sections be approximately in parallel and the profiles of geological bodies in the neighboring sections have no dramatic difference. This paper proposes a method for interactively constructing 3D geological models, capable of handling the cases where the normal conditions are not satisfied. The method uses the common algorithm of rasterizing and an algorithm of vectorization coming from Marching Cubes to realize the inter-transform between the vector and raster. The method improves the performance of 3D geological editing while maintaining the consistency of model topology.