Through analysis of the source codes , we added the chinese boolean operation to its function and improved the interface between user ’ s browser and background search engine at web front for query optimization 我们的最主要任务是在此基础上增加中文“与”查询和中文“或”查询两项新功能。
In this paper , an efficient algorithm for implementing boolean operations between regions is presented , which can deal with the regions involving several polygons with holes in them 本文提出一个有效的实现区域布尔操作的算法,其中区域可以由多个多边形组成,并且每个多边形可以有多个孔洞。
Boolean operations of regions include intersecting , subtracting and joining , which are widely used in practice . and we cannot find these functions in most popular and common used software products 区域的“交” 、 “差” 、 “并”等布尔操作在现实中具有很广泛的应用,但在常用的软件中找不到它的具体实现。
26 wyvill b , guy a , galin e . extending the csg tree - warping , blending and boolean operations in an implicit surface modeling system . computer graphics forum , 1999 , 18 : 149 - 158 本文的工作,不是要对已有的复杂cad模型进行反向工程,而是表明:即便有大量的布尔运算,我们的方法也能保持尖锐边超形能很好地进行实体建模。
American journal of botany , 2003 , 90 : 333 - 338 . 19 fougerolle y d , gribok a , foufou s , truchetet f , abidi m a . boolean operations with implicit and parametric representation of primitives using r - functions 在此,超形的表面以所允许的精度进行采样生成,而它们的顶点和面片将根据隐函数的刻画来决定它们是否用于最终实体表面的生成。
This paper researches the basic algorithms of computer graphics including the algorithm for implementing boolean operation between regions and the pixel - level algorithm for generating parametric curves by dividing the segments 本文的工作是对计算机图形学中的基础算法进行研究。包括一个能实现区域的布尔操作的算法,以及参数曲线的分段生成算法。
This new simulation algorithm represents the workpiece and tool within allowable precision by scan algorithm based on view - coordinate system , thus simplifies the complex three - dimension boolean operation into one - dimension boolean operation 该算法基于观察坐标系,利用扫描线算法在精度?围内表示工件和刀具,从而将复杂的三维布耳运算简化为一维布耳运算。
This new simulation algorithm represents the workpiece and tool within a llow able precision by scan algorithm based on view - coordinate system , thus simplifie s the complex three - dimension boolean operation into one - dimension boolean opera tion 该算法基于观察坐标系,利用扫描线算法在精度范围内表示工件和刀具,从而将复杂的三维布尔运算简化为一维布尔运算。
The dissertation also extends it to boolean operations for non - manifold tt models . to meet the demand of some time - critical situation , the dissertation presented a distributed algorithm for boolean operations of curved solids 为了在某些限时操作下得到实时交互的速度,在运动雕塑实体布尔操作的基础上,本文进一步提出了一个运动雕塑实体模型布尔操作的分布式并行算法。
It is reali zed that the invisible part of the object can be shadowed , using the max imum or minimum enveloping rectangle method and the counter of points of intersection method , etc . ( 3 ) the boolean operation between integrity or unintegrity bodys is supplied 分析并讨论了形体产生隐藏线、隐藏面的原因,利用了最大最小外包矩形法、交点记数法等,实现了任意形体的消隐算法。 ( 3 )完成了形体间的正则、非正则布尔运算。