三维图

Peaks(30); N=16;% number of contour lines and their colors clf % clear the current figure view(3)% set view to 3-D hold on % hold blank screen setgca,' ColorOrder ',hsv(N % use colors from default hsv colormap contour3 % draw N contour lines grid,xlabel(' X-axis '),ylabel(' Y-axis '),zlabel(' Z-axis ') title(' CONTOUR3 of PEAKS ') hold off

输出见图 18.17。图 18.17 函数 PEAKS 的三维等值线图现在，各条等值线的颜色沿着 z 轴的变化和网格图曲面图网格图和曲面图网格图曲面图一样。

Through customizing 3D template and 2D drawing template, Improving the efficiency of using Pro/Engineer modeling greatly, bringing the result that gets twice the result with half the effort to the establishment of the 2D drawing and BOM too.

通过三维模板及二维工程图的定制，大大提高了使用Pro/Engineer建模的效率，也给二维工程图及BOM的创建带来事半功倍的效果。

This method use the silhouette of object in image as feature, after approaching with polylateral, a serious control point can be got, the feature vector of object's contour can be got by calculating the parameter of AR model, which use the sequence of angles got from control points.

该方法以目标二维方面图轮廓为特征，经多边形逼近获得边界控制点，计算出边界控制点对应角序列的AR系数作为相应方面图的特征向量，建立三维目标的在各种姿态下的姿态特征库。

The predicted two-dimensional axisymmetric distributions of density and mass fraction were converted to the three-dimensional distributions,and then the computational shadowgraph s were obtained based on the optics theory of the shadowgraph.

并将计算获得的密度和组分等的轴对称二维分布转换为三维分布，由阴影图的光学原理，绘制了相应的计算阴影图。

As reconstruction of a 2-D image on a spherical surface actually creates a three dimensional (3-D) displays, this technique may plays an important role in attempts at reconstruction of 3-D images from CGHs.

募扑慊D？二维图像重现于球面实际上了产生三维显示，因此上述方法在从计算全息图重现三维图像方面起到重要的作用。

Carl Ludwing explains how this technique differs from traditional texture mapping : when you want something to be in a certain area, like a grease spot, everyone else tends to do it with standard texture-mapping tools. But if I take a painted map and map it on, then I've wrapped a two-dimensional object around a three-dimensional object, and there are all sorts of positioning problems associated with that. Also, when you transition to another subpart of the character, you have to provide a whole new set of coordinates.

卡尔·路德温解释了这一技术与传统材质贴图技术的不同之处，比如说：如果想把油点一类的东西贴到某个地方，别人都会用标准的材质贴图工具来完成，但是如果我先拿来一张着色的地图，把这个油点标在上面，那就等于把一个三维物体安置在二维环境当中，随之会出现各种定位方面的问题，同样，如果你要观察目标的另一处次要部位，就必须给出新的坐标。

Rendering 2D GIS layer in 3D environment is the key problem of realizing compact type of the two and three dimensional integration GIS system.

在三维系统中实时渲染二维图层是实现紧密型二三维结合GIS的关键。

ABSTRACT: The UAV navigation system's performance is improved through embedding the geography information model that can process the vector map data in the system by using MapX, In this paper, how to navigate and plan the UAV flight course in the vector map is investigated. The basic control and operation for vector map in the geography information system is introduced, and the flight course is designed and modified in the map. In addition, 2D vector map can't orient UAV in 3D space, so the altitude model is added in the UAV navigation system to realize 3D orientation by integrating 2D vector map with altitude plot. The simulation results in the UAV simulation system indicate that the navigation system can monitor and control UAV efficiently and intuitionally.

使用MapX在无人机导航系统中添加能够处理矢量地图数据的地理信息模块，可以显著地提升系统的性能；文章对如何在矢量地图下进行无人机导航与任务规划进行了研究，完成对地理信息系统中矢量地图的基本控制和操作，并在地理信息图上进行航线的设定与修改；另外，针对二维矢量地图无法对无人机进行三维空间定位的问题，文章通过在无人机导航系统中添加高度位置显示模块，用二维平面地图与高度图相结合的方式来实现对无人机位置的三维定位；通过在无人机仿真实验系统中的使用，证明了该系统能高效、直观地对无人机飞行进行监视与控制。

Object edges are grouped on the basis of their geometrical and connectional relationships.

1引言计算机视觉研究的一个主要任务就是从二维图象来描述三维景物，即图象中各物体的属性以及他们之间的相互关系。

The orthograph can be transformed to the 3D graphics by using 3D functions in AutoCAD, thus all analysis and reasoning for the solution can be clearly visualized in 3D space, and then by baking to the 2D environment the solution can be easily made.

借助AutoCAD的三维图形功能，可将平面正投影图转化为空间三维图形，在三维空间进行分析、推理和求解，然后再返回二维作图，使解题过程概念清晰，可视性强。

The reasons of iron ions content overproof in grade Ⅱ desalting water system,such as variation water quality,contamination of regenerant , operation adjustment of pretreatment system and switching operation of bed were discussed.

对二级脱盐水系统中铁离子含量超标的原因，如来水水质发生波动、再生剂受到污染、预处理系统操作调整、床体运行切换等进行了论述。

You were hired to drum up new business, so go and do it.

公司雇你招徕新业务，你就做你的事好了。