查询词典 concave

Data stucture of the model is also put forward. On account of OpenGL cant paint concave polygon, a new method named partition of beenline is brought forward.

在对建筑物封顶时，针对OpenGL不能直接填充凹多边形运用了一种直线剖分的方法来实现OpenGL对凹多边形的填充。

Free form surface ; simple polygon ; concave vertices ; route planning

自由曲面；简单多边形；凹点；路径规划

By talking above problems, the paper brings forward a new concept that is called the background information of grid creation, and thinks over three points of the improvement of front advance, and puts forward and talks the essential of judging whether the polygon is concave or protruding and six practical methods.

在探讨过程中，本文提出了背景信息这一概念，考虑了改进阵面推进法的三个要点，提出并详细讨论了判断多边形凹凸方法的实质和六种实用方法，此外还着重对网格粗细会对数值计算产生什么影响及如何产生影响作了较严格的分析。

A new polygon filling method——polygon trapezoidal decomposition filling method——is put forward and realized. An analytical comparing between its time complexity and that of the classical methods shows that it is faster than scan-line algorithm in the case of complex concave polygon.

提出了一条新的多边形填充思路——多边形梯形网格剖分填充法，实现了该算法并将其时间复杂度与经典的有序边表算法进行了比较，说明该方法在复杂的凹多边形情况下处理速度较有序边表快。

The implementation process of the algorithm is as follows: First, the scanning lines of each contour are generated, while the contour's shape can be divided into convex polygon and concave polygon, and the generating process of the scanning lines of each contour needs special treatments .

首先依次生成每个轮廓的轮廓扫描线，由于轮廓形状可能为凸多边形也可能为凹多边形，所以在生成各轮廓的扫描线时要增加一些特殊处理操作。

By decomposing each polygon into a set of several individual convex sub-polygons and constructing the map between the two sets, this method can solve the metamorphosis problem of two polygons which have not same topology(including concave polygon and holey polygon).

解决了任意非同拓扑结构的变形问题。

If for all in, then is concave down on.

若在内，则在上的图形是凸的。

It is useful in many branches of mathematics analysis through the research of concave and convex functions.

对函数凹凸性的研究，在数学分析的多个分支都有用处。

We say that is concave down on.

那么称在上的图形是凸的。

The palm of one's hand is slightly concave.

人的手掌是微凹的。

With the aid of the parser tree of L, the authors analyse some characteristics of words belonging to Adh, and prove iteration theorems for adherences of regular languages and context-free languages, thus solving the problem on syntactic structure for the adherence of corresponding languages.

语言附着的句法结构郭清泉（山东大学计算机科学系，济南250100）摘要本文研究语言L的附着Adh的句法结构，借助于L的语法分析树，我们分析了Adh的句法特征，提出并证明了正规语言和上下文无关语言附着的叠代定理，从而解决了这两类语言的附着的句法

Some of the well known camping grounds in America are-Yellowstone National Park, Isle Royal National Park (known for its aura of tranquility), Great Basin National Park, Dry Tortugas National Park (snorkeling, scuba diving, Tropical fish and wildlife), Point Reyes National Park, Greta Canyon National Park, Joshua Tree National Park, Denali National Park and so forth.

一些著名的露营地是在美国，黄石国家公园，皇家岛国家公园，大盆地国家公园，海龟国家公园（浮潜，潜水，热带鱼类和野生动物），雷伊斯角国家公园，葛丽泰峡谷国家公园，约书亚树国家公园，Denali国家公园（滑雪和雪shoeing）等等。