As we all know, the more points we have, the more can be constructed triangulations, and the city construction's details are show more. But now the point cloud data we collected existence of a large quantity and data redundancy, it would greatly enhance the time cost of the follow-up Grid Construction and other operating.

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In the first place, this paper reviews two main methods in surface triangulations, named as plane-projection and direct triangulation. For the former, Delaunay triangulations are mainly enunciated.

本文回顧了三維散亂點(diǎn)集曲面三角剖分的兩種主要方法即平面投影法和直接剖分法，對幾種常用的算法作了較為詳細(xì)的描述最新精品黄色网站久爱，同時(shí)對剖分算法中經(jīng)常出現(xiàn)的數(shù)據(jù)結(jié)構(gòu)作了詳細(xì)的介紹人妻天天爽一区性色AV。

In the first place, this paper reviews two main methods in surface triangulations, named as plane projection and direct triangulation. For the former, Delaunay triangulations are mainly enunciated. For the later, algorithm developed by B. K. Choi is particularized. Some typical algorithms are introduced in detail, as well as various data-structures built in these algorithms.

本文回顧了三維散亂點(diǎn)集曲面三角剖分的兩種主要方法即平面投影法和直接剖分法，對幾種常用的算法作了較為詳細(xì)的描述亚洲综合日韩Av无码毛片天堂，同時(shí)對剖分算法中經(jīng)常出現(xiàn)的數(shù)據(jù)結(jié)構(gòu)作了詳細(xì)的介紹高清精品国产丝袜在线拍国语。

After defining notations and ways of positioning on these surfaces, the book considers the problems of the construction of convex hulls , Voronoi diagrams , and triangulations , proximity problems , and visibility problems .

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It is pointed that, in practical engineering, it is necessary to develop new algorithms with new criteria for triangulations of scattered points sampled from complicated surfaces so as to maintain the properties such as better smoothness and shape preserving. Finally the time and space complexities of various algorithms are briefly and concisely discussed, also the research trend of surface triangulations based on 3D arbit rary point-sets.

最后簡要地討論了算法復(fù)雜度以及目前剖分的主要研究方向福利一区在线清纯，并指出在實(shí)際工程應(yīng)用中對復(fù)雜曲面采樣得到的散亂點(diǎn)集，要得到光順和保形的三角剖分亚洲狠狠综合网站，需要新的剖分準(zhǔn)則和算法人人爽人人爱人人干人人摸。

Like aircraft seats, the HX's seats are constructed on a lightweight framework with minimal components that feature lightening holes and strength-enhancing cross braces or triangulations.

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It was there he invented and developed the Pulse Jet Engine, a one-man single bladed jet helicopter which he test flew himself and also a Delta Wing Convertiplane for the United States Airforce.

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