【摘要】 为实现复杂矿体表面模型至块段模型的转换,提出采用8叉树结构存储块段模型,使用有向包围盒(OBB)进行单元块与表面模型的相交检测.对于判断点在多面体内的算法进行比较,对Feito-Torres方法进行改进以更加准确地模拟复杂矿体形状.实验证明,该方法能够准确地从各种具有面片重复、相交和开口的表面模型建立复杂矿体的块段模型,减小数据量,对于输入的表面模型数据容错能力强,并且具有健壮性.更多还原

【Abstract】 To convert the polyhedral model of complex orebody to block model,an octree was used as data structure of block model and an OBB(oriented bounding box) was employed to implement intersection test of block and polyhedral model.Algorithms for point inclusion test in polyhedral model were compared and the Feito-Torres algorithm was improved to represent the complex orebody more accurately.The results show that this approach can create block model of complex orebody accurately from polyhedral model even if there exists duplicate faces,intersections and opens.Moreover,it can reduce the amount of data,has high fault tolerant capability for polyhedral model and it is robust.更多还原