二维域的有限三角剖分

本文提出了一种适用于多连通的多边形区域的三角剖分和非爱的受限数据的三角剖分算法。该算法简单、直观，采用翼边型数据结构，用Ｄｅｌａｕｎａｙ剖分方法实现。     

复连通多边形的三角剖分

文章简要回顾了多边形的三角剖分 ;基于将复连通多边形假定看作简单多边形的思想 ,着重讨论了复连通多边形的三角剖分 ;通过对具体实例的分析 ,将判断多边形顶点的凹凸性与判断某点在三角形的外部或内部的问题合二为一 ,简化算法函数     

一种裁剪曲面自适应三角剖分算法

本文介绍了一种裁剪曲面按精度三角剖分算法。三角剖分过程在参数域和曲面空间同时进行，参数域上控制三角片的拓扑关系，曲面空间进行精度检测。算法的核心思想是将裁剪曲面三角剖分视为约束剖分问题，从而使得三角形的细分操作拓展为有效域内插入散乱节点的三角剖分问题。算法简便、实用，三角化结果品质良好，已成功地应用于数控加工刀具轨迹干涉处理等具有精度要求的应用领域。     

二维约束点集Delaunay三角剖分算法研究

在已有算法基础上，提出了任意二维约束点集Delaunay三角剖分的新算法，算法仅在局部产生少量新点，并在局部对三角剖分进行修改，便可保证整体三角剖分符合Delaunay性质。     

散乱数据点三角剖分方法综述

构造散乱数据插值曲面首先必须对散乱数据点实行三角剖分。本文简要阐述三角剖分的基本概念。并按优化准则将现有的各种三角剖分方法进行分类比较,为建立更好的凸域三角剖分算法提供依据,并为解决复杂多边形区域散乱数据点三角剖分奠定基础。     

三维点集Delaunay三角剖分的自动生成与修改算法

本文在已有算法的基础上，提出了一个三维点集Ｄｅｌａｕｎａｙ三角剖分的自动生成及其修改算法。自动生成算法对点在空间的位置没有任何限制，修改算法充分利用已完成的计算量，当动态增加或减少一点时，仅在局部进行适当的调整即可保证整体三角剖分符合Ｄｅ－ｌａｕｎａｙ性质。文中给出了算法正确性的证明。     

三维点集Delaunay三角部分的自动生成与修改算法

本文在已有算法的基础上，提出了一个三维点集Ｄｅｌａｕｎａｙ三角剖分的自动生成及其修改算法。自动生成算法对点在空间的位置没有任何限制，修改算法充分利用已完成的计算量，当动态增加或减少一点时，仅在局部进行适当的调整即可保证整体三角剖分符合Ｄｅｌａｕｎａｙ性质。文中给出了算法正确性的证明。     

基因遗传算法在三维数据场造型中的应用

将基因遗传算法应用于三维数据场的造型研究之中,提出了遗传三角剖分算法。针对三维三角剖分的特殊性,提出了虚拟交叉算子和三角变异算子,能够确保在遗传进化过程中,解群中的每一个串始终代表一个合法的三角剖分。     

基于凹凸顶点判定的简单多边形区域的三角剖分

本文先介绍了基于凹凸顶点判定的简单多边形的三角剖分算法 ,然后提出了一种新的算法 ,将简单多边形区域转化为简单多边形 ,进而实现简单多边形区域的三角剖分     

一种裁剪曲面自适应三角剖分算法

本文介绍了一种裁剪曲面按精度三角剖分算法。     

二维任意域约束Delaunay三角化的实现

本文设计了一种逐点加入一局部换边法,提出并证明了二维约束边在约束Ｄｅｌａｕｎａｙ三角化中存在的条件,并据此用中点加点法实现了二维任意域的Ｄｅｌａｕｎａｙ三角剖分,生成的网格均符合Ｄｅｌａｕｎａｙ优化准则,网格的优化在网格生成过程中完成,算法复杂度与点数呈近似线性关系,给出了算法在平面域剖分和包含复杂断层的石油地质勘探散乱数据点集剖分的应用实例。     

ASPECTS OF 2-D DELAUNAY MESH GENERATION

This paper aims to outline the different phases necessary to implement a Delaunay-type automatic mesh generator. First, it summarizes this method and then describes a variant which is numerically robust by mentioning at the same time the problems to solve and the different solutions possible. The Delaunay insertion process by itself, the boundary integrity problem, the way to create the field points as well as the optimization procedures are discussed. The two-dimensional situation is described fully and possible extensions to the three-dimensional case are briefly indicated. © 1997 by John Wiley & Sons, Ltd.     

New longest-edge algorithms for the refinement and/or improvement of unstructured triangulations

In this paper I introduce a new mathematical tool for dealing with the refinement and/or the improvement of unstructured triangulations: the Longest-Edge Propagation Path associated with each triangle to be either refined and/or improved in the mesh. This is defined as the (finite) ordered list of successive neighbour triangles having longest-edge greater than the longest edge of the preceding triangle in the path. This ideal is used to introduce two kinds of algorithms (which make use of a Backward Longest-Edge point insertion strategy): (1) a pure Backward Longest-Edge Refinement Algorithm that produces the same triangulations as previous longest-edge algorithms in a more efficient, direct and easy-to-implement way; (2) a new Backward Longest-Edge Improvement Algorithm for Delaunay triangulations, suitable to deal (in a reliable, robust and effective way) with the three important related aspects of the (triangular) mesh generation problem: mesh refinement, mesh improvement, and automatic generation of good-quality surface and volume triangulation of general geometries including small details. The algorithms and practical issues related with their implementation (both for the polygon and surface quality triangulation problems) are discussed in this paper. In particular, an effective boundary treatment technique is also discussed. The triangulations obtained with the LEPP–Delaunay algorithm have smallest angles greater than 30° and are, in practice, of optimal size. Furthermore, the LEPP–Delaunay algorithms naturally generalize to three-dimensions. © 1997 by John Wiley & Sons, Ltd.     

USING LONGEST-SIDE BISECTION TECHNIQUES FOR THE AUTOMATIC REFINEMENT OF DELAUNAY TRIANGULATIONS

In this paper we discuss, study and compare two linear algorithms for the triangulation refinement problem: the known longest-side (triangle bisection) refinement algorithm, as well as a new algorithm that uses longest side bisection techniques for refining Delaunay triangulations. We show that the automatic point insertion criterion, taken from the fractal property of optimal (linear) longest-side bisection algorithms, assures the construction of good quality Delaunay triangulations in linear time. Numerical evidence, showing that the practical behaviour of the new algorithm is in complete agreement with the theory, is included. © 1997 by John Wiley & Sons, Ltd.     

飞行器RCS计算中曲面剖分技术研究与实现

飞行器RCS预估计算是隐身技术研究中的重要研究内容。论述了利用飞行器外形的特点,在满足飞行器设计误差的前提下使用平面和柱面对飞行器的整机作NURBS曲面逼近,然后用柱面和平面剖分代替曲面的剖分。实现了飞行器整机模型的指定边长的三角剖分。这种方法不同于有限元计算的网格剖分,具有网格单元与曲面曲率无关和剖分速度快等特点。     

基于栅格和三角形拓扑的快速优化构网方法

点集三角化在ＣＡＤ,计算机图形学,有限元等领域有着广阔的应用,快速与优化是与之相关的两个重要问题。本文提出一种快速优化构网方法,在实现中的采用了基于栅格的离散点组织方式和基于三角形的数据结构,并给出了一些快速搜索和快速计算算法,本方法支持约束边的引入,并无需插入附加点。     

微位移视觉测量系统光学结构参数设计方法研究

在激光三角法原理的微位移视觉测量系统中，根据成像公式和原则提出了一种基于Visual C＋＋ 6．0的计算机辅助公式设计法，可以对光学系统结构进行简便、快速和精确计算。该方法不仅可以迅速得到光学系统相关结构参数，还可以应用于光学成像系统光学参数的设计和优化，使整个测量系统的设计和完善更加快速有效。     

裁剪曲面的三角化及图形显示

结合自主版权的超人ＣＡＤ／ＣＡＭ系统的开发，本文提出了一种适合于裁剪曲面图形显示的曲面三角化算法，该算法将曲面的三角化转化为曲面参数域的三角化，并将二维图形的集合运算与Ｄｅｌａｕｎａｙ三角剖分应有和于曲面参数域边界的处理，从而使裁剪曲面在边界上的三角形分布均匀。     

‘Ultimate’ robustness in meshing an arbitrary polyhedron

Given a boundary surface mesh (a set of triangular facets) of a polyhedron, the problem of deciding whether or not a triangulation exists is reported to be NP‐hard. In this paper, an algorithm to triangulate a general polyhedron is presented which makes use of a classical Delaunay triangulation algorithm, a phase for recovering the missing boundary facets by means of facet partitioning, and a final phase that makes it possible to remove the additional points defined in the previous step. Following this phase, the resulting mesh conforms to the given boundary surface mesh. The proposed method results in a discussion of theoretical interest about existence and complexity issues. In practice, however, the method should provide what we call ‘ultimate’ robustness in mesh generation methods. Copyright © 2003 John Wiley & Sons, Ltd.