布尔运算

用基于NURBS体三参数u、v、w的体素模型实现NURBS体的并、交、差布尔运算。

Based on Voxel-based NURBS volumes , the Boolean operations are accomplished .

基于布尔运算的VRML模型创建技术研究

Research on modeling technology for VRML models based on Boolean calculation

STL模型布尔运算交线链和交线环提取算法

Forming intersection chains and loops in Boolean operation of STL models

运用布尔运算推导出了波形空间是Banach空间；

To deduce out that the waveform space is a Banach space using the Boolean operation .

基于空间离散化的STL模型布尔运算

Boolean operations of STL models using spacial discretization

基于CDT与布尔运算的露天矿三维建模

A 3D model of surface mine based on CDT and Boolean operation

STL模型布尔运算的实现

Implementation of boolean operations on STL models

将本文算法，应用到了基于RBF隐式曲面的碰撞检测和布尔运算等。并提出一个优化算法，可以加快隐式曲面进行布尔运算的速度。

We also applied our method on RBF-based collision detection and Boolean operations . We also propose a method to speed up the Boolean operations of implicit surface .

基于activexautomation技术，利用VISUALBASIC对AutoCAD进行二次开发，通过布尔运算实现了ZK蜗杆的三维加工仿真。

Based on the technology of the ActiveX Automation , AutoCAD was exploited secondly by Visual Basic and the three-dimensional simulation of the ZK_type worm machining was realized by boolean operation .

结果表明布尔运算法在运行时间和运算结果方面均不适于生产实际要求，可应用于定性的CAD仿真观察。

The results show that Boolean operation is unfit for the requirement of the manufacturing , as the runtime of which is long and the results are inaccuracy , but it can qualitatively apply to simulation of CAD .

主要介绍在AutoCAD的平台上，采用VBA开发工具，利用布尔运算，根据仿形法齿轮加工原理，对斜齿轮加工过程进行三维动态仿真。

Based on AutoCAD , VBA program tool and Boolean operation , this paper introduces the 3D simulation of helical gear machining by the method of imitating gear profile .

研究了二层树结构CSG模型一维布尔运算的快速算法，并给出了在图形显示应用中的实例。

The one-dimensional boolean evaluation algorithm for two-level CSG model is explored and its application in the shading image processing is implemented .

由于STL文件格式具有严格的拓扑信息，这正为布尔运算提供了支持，同时也是STL文件二次设计的关键。

It will support the Boolean Operation and will be the key for second design of the STL models , because of the STL models has strict TOP information .

首先，在Mimics软件中利用股骨CT图像数据重建股骨三维模型，并通过布尔运算获取股骨髓腔模型用于个性化人工髋关节柄的设计。

Firstly , reconstruct a three-dimensional model by using the femur CT image data in Mimics software , and get the femoral medullary cavity model through the boolean operation to design the individualized artificial hip joint handle .

另一种为基于特征线的直接数值仿真，通过简化面齿轮仿真加工中的布尔运算，采用FORTRAN语言编制仿真程序。

The other one , which is a new method of face gear digital simulation called the characteristic line method , predigests the Boolean calculation , and constructs the system of simulation using FORTRAN .

通过实例介绍了AutoCAD的三维技术、利用形体分析和布尔运算构建三维模型的方法以及由三维模型生成二维工程图的方法和技巧。

By means of real examples , 3D technology of AutoCAD , the way of structuring 3D model using combined individual part analysis and Boolean operation , and the method of generating 2D engineering drawing from 3D model are introduced .

文中研究了Voxel模型的压缩数据结构及其布尔运算、基于压缩模型的MarchingCubes优化算法、实体模型的分步体素化方法等多项内容；

The author have studied a compressed data structure and it 's Bool operation , gave it 's optimized Marching Cubes algorithm and a two-steps disperse algorithm from solid model to Voxel model .

然后，基于图形库OpenGL完成了包括凹多边形的分割、多边形的布尔运算、圆的多边形转化、模型上表面获取等基础算法；

Secondly , some foundational arithmetic such as the division of concave polygon , the polygon 's boolean operation , the transform from circle to polygon , the pick-up of model top surface were designed particularly based on OpenGL .

利用三维特征形体布尔运算的重建方法，用OpenGL技术在WindowsVisualC++6.0环境进行三维特征重建，使重建的结果易于在后续研究和实验中广泛深入地应用。关于广义向量空间模型中布尔运算的修正

With Boolean calculation of 3D feature solid , the solids are reconstructed by OpenGL technology in Windows Visual C + + 6.0 . It can be used farther in studies and tests later . An Improved Method of Processing Boolean Queries in Generalized Vector Space Model

通过多面体的三向DEXEL模型与并、交、差布尔运算，生成任意复杂型体的三向DEXEL模型。

A DEXEL-oriented algorithm of polyhedrons was proposed and a three direction DEXEL model was constructed .

在提出的基于DEXEL体造型系统中，通过布尔运算可很容易设计这些复杂结构。

But by using the DEXEL based on modeling system and Boolean operations , it becomes easy .

软件处理是整个快速成形体系的核心，但是在软件方面我国与国际领先水平相比还存在一定的差距，特别是STL模型布尔运算算法的时间复杂度和稳定性两个方面存在巨大差距。

Software holds the core position in the whole Rapid Prototyping system , but there is still a large gap between the domestic and the international leading companies especially when it comes to the time complexity and the stability of Boolean operation .

就像懂得逻辑连接（布尔运算AND）的人脑可以类似地将逻辑连接的句子分类那样，TLU也懂得一点逻辑连接之类的东西。

Insofar as a human brain that knows about logical conjunction ( Boolean AND ) would similarly classify logically conjoined sentences , this TLU knows something like logical conjunction .

简述了几种FDM支撑自动生成算法的特点，提出了一种基于多边形布尔运算的FDM支撑生成算法，并构建了一种密集与疏松相复合的支撑路径规划方法。

The characteristics of several algorithms of automatic support generation and an algorithm of automatic support generation of FDM based on polygon Boolean operation have been presented . A way used for the layout of support paths consisting of densely covered type and loosely covered type has been established .

利用直线与自由曲面的求交算法实现了工件曲面和刀具扫描体曲面Z-map模型的建立，将两个Z-map模型进行布尔运算完成了工件曲面Z-map模型的更新。

The Z-map models of workpiece and tool swept volume are established by an intersection algorithm between line and free-form surface , and then update of the workpiece is realized by a boolean operation between workpiece Z-map model and tool swept volume Z-map model .

基于进点出点概念实现的G-H算法是公认最高效的布尔运算，但对于退化情况没有有效解决，存在很严重的稳健性问题。

The G-H Boolean algorithm is recognized as the most efficient algorithm , which is based on the concepts of entry point and exit point . However , the G-H algorithm exists a serious robustness problem , since it does not provide an effective solution for degenerate cases .

一个基于剖面图的实体布尔运算算法

A New Boolean Operation Algorithm Based On Cross - Section Chart

多边形布尔运算的降维算法

Polygon Boolean operations declining dimension in the aspects of calculate way

二维布尔运算是计算机图形学中的基本算法。

The Boolean operation is a primary algorithm in computer graphics .

特征实体造型的数据结构及其一维布尔运算算法

Data structure and 1-D Boolean evaluation algorithm of feature solid model