投影线

And the mathematical model of"MFC"is built on the basis of simulating the fairing tool-"French Curve"which is usually used for drawing ship lines.

在实际应用中，本文还将二维的"数学曲线板"拓广应用于三维的船体型线的自动光顺修改，避免了通常修改一个型值点必须反复在三个投影面上交互修改的麻烦。

According to the feature of drawing crystal shape from gnomonic projection,a data structure (the single 3 table chain structure )is presented.

根据极平投影绘晶体形态的特点，建立了一种数据结构———单链三表结构，此结构由面表、线表、点表组成，能充分反映晶体形态的拓扑信息和几何信息，并在此基础上设计了一种适合于变换和消隐处理的数据结

The article narrates teaching methods of point, line and surface according to one hexahedron.

本文从便于学生理解的角度，结合教学实践，较为详尽的阐述了如何使用一个六面体来进行点、线、面投影的教学。

According to the basic concept of stereogram projection,combning the functions of controling layer on view window and deleting hidden lines in paper space,to auto draft stereogram can be completed.

根据体视投影的基本原理，把AutoCAD的视窗功能、针对视窗的图层控制功能、在｀图纸空间隐线的功能等加以综合应用，实现体视图的自动绘制。

The length of the work by drawing the corresponding part of the solid line of work, so that the time coordinates in the horizontal projection of length equal to working time ; virtual work because they do not account for ...

按各工作的时间长度绘制相应工作的实线部分，使其在时间坐标上的水平投影长度等于工作时间；虚工作因为不占。。。

Trend is the direction of the horizontal projection of a line, measured clockwise from north.

线倾向：它是直线水平投影的方向，自正北顺时针度量。

By contrast, it is proved more superior that the spline curve is used to match hyperbolic line instead of arc, and the problem about drawing of hex nut is solved in AutoCAD which was adopted in textbook of engineering drawings.

解决了工程制图中螺母近似画法在AutoCAD中应用时出现多线相交的问题，从而可以在符合实物投影的基础上形成一个比较好的统一改进近似画法规范。

This article presents the reader a new method of judging if the vertical plane s of two different projecting planes are crossing and how to analyze the intersecting lines of it by using the similar shape complementary principle.

提出了一种利用类似形互补原理，判断两个不同投影面的垂直面是否相交以及它们的交线部分的看图新方法，目的在于解决视图中的斜线问题，便于理解和把握形体的整体形状，便于看图和画图。

Draw the projection of the intersection line.

在相交处应画出交线的投影。

For example, the Mercator projection is widely used by boats and ships because it produces a map in which lines of constant bearing are a straight line, which greatly simplifies navigation.

例如，墨卡托投影是广泛使用艘舟艇，因为它产生的地图中，不断轴承线一条直线，从而大大简化了导航。

Plunder melds and run with this jewel!

掠夺melds和运行与此宝石！

My dream is to be a crazy growing tree and extend at the edge between the city and the forest.

此刻，也许正是在通往天国的路上，我体验着这白色的晕旋。