First, there is a method ST_Centroid defined for polygons.
首先，有一个为多边形定义的方法 ST_Centroid。
You can easily draw four-sided polygons in Processing with quad.
在Processing内使用quad可以很容易地绘制有四个边的多边形。
Basic shapes: rectangles, circles, ellipses, lines, polylines, and polygons.
基本形状：矩形、圆、椭圆、直线、折线以及多边形。
Build with an efficient topology - use polygons only where you need them.
建立一个有效率的拓扑，只有当你需要时才使用多边形。
The manufacturer had an existing table with the depot polygons already defined.
制造商有一个已经定义了维修站多边形的现成的表。
Get number polygons in destination object.
获取目标物体多边形面的数量。
How to convert GIS rasters into vector polygons?
如何将GIS栅格到矢量多边形？
TheNavMesh stores this surface as convex polygons.
导航网格把这个表面存为凸多边形。
This means that some cubes can contain the same polygons.
这就意味着一些立方体可能包含着同一个多边形。
Based on this method, curvilinear polygons were offset on the surface.
基于这个方法，在曲面上偏置曲线多边形。
If the model is a single closed object, all polygons will now be consistent.
如果模型是一个封闭物体，那所有多边形顶点的排序顺序已经一致。
At the moment, only the polygons pointed towards the light source will be lit.
在我们的场景里，只有朝向光源的多边形是被照亮的。
This will make the light ignore the polygons' angles, which is exactly what we want.
这将使灯光忽略多边形的角度，正如我们所希望的那样。
Computing the intersections of a large number of polygons can be very time consuming.
计算庞大数量多边形的交叉点是非常花时间的。
No-Fit Polygon is an effective method to judge the relative position of two polygons.
临界多边形是判别两个多边形相互关系的一个非常有效的方法。
Both GeoRSS formats support basic feature geometries (points, lines, boxes, and polygons).
这两种georss格式都支持基本的地理特征(点、线、边框和多边形)。
The recognition of planar polygons has many important applications in computer vision.
在计算机视觉中，平面多边形的识别有着十分重要的意义。
The shape of block stones shall be close to straight prism or regular quad or polygons.
块石形状应接近直棱柱体，或有规则的四边形或多边形。
Usually the design is symmetrical, in the form of combinations of polygons or quatrefoils.
通常设计是对称的，多边形或四页花形的组合。
Consider drawing polygons tracing the edge of certain layers with heights equal to the cloud tops.
考虑绘制跟踪高度等于云顶的特定图层边缘的多边形。
This repeats recursively for each new 'correct' polygon until no more neighboring polygons can be found.
对每个处理后的多边形递归执行这个步骤，直到没有邻接多边形。
After reading in the Step 1 pie chart, polygons specified by the triangle vertices file are drawn on the Step 1 chart.
在读入步骤1的饼图后，将在步骤1的图表中绘制由三角形顶点文件指定的多边形。
On the basis of this, the paper presents a new method of processing meaningless polygons in overlaid map from vector GIS.
在此基础上，进一步提出了一种处理矢量gis叠置图中无意义多边形的新方法。
This algorithm can be used to calculate not only intersection but also set-theoretic differences and union of two polygons .
该算法不仅可以求多边形的“交”，而且可以求多边形的“并”和“差”。
At the middle level, a portable graphics engine provides support for line draws, area fills, polygons, clipping, and color models.
在中间层，可移植的图形引擎提供对线的绘制、区域的填充、多边形、裁剪以及颜色模型的支持。
Convex polygons are a usefulrepresentation, since we know that there are no obstructions between any twopoints inside a polygon.
凸多边形是一个很有用的表示法，因为我们知道凸多边形内部任意两点之间没有障碍。
There's support for native playback of audio and video files, and the Canvas element, with support for animated 2-d polygons and text.
IE 9 Beta支持本地播放音频视频文件，支持画布元素，还支持2d多边形动画与文本。
You can also easily attach different components (markers, information texts, controls, ground overlays, polygons, polylines) to the map.
您还可以轻松向地图添加几个不同的组件(标记、信息文本、控件、地表覆盖、多边形、多段线)。
Creates two or more polygons that are filled using the current polygon-filling mode. The polygons may be disjoint or they may overlap.
创建使用当前多边形填充模式的两个或多个多边形，多边形可以相互分开或叠加。
You can easily list tables containing spatial data and select tables to display as a map using a combination of points, lines, and polygons.
可以很方便地列出包含空间数据的表，并可将表展示为由点、线、和多边形组成的图。
应用推荐