关于一些Apex入侵投影和Apex全息投影的题，很多人都是想知道的，接下来小编为你讲解一下吧！
Apex入侵投影
今日咋们进修《机械制图》——立-体投影第一部-分的内容啦。重要的进修内容是立-体及其表-面上的点与线啦。Today we are studying Mechanical Drawing - Stereographic Projection Part 1. The main topic of study is the stereoscope and the points and lines on its surface.
No.1 平面立-体
一.平面立-体
1.立-体可分为两类表-面都是平面的平面立-体和表-面是曲面或者曲面与平面的曲面立-体啦。
2.平面立-体的表-面是若干个平面多边形，因而，绘制平面立-体的投影，可归结为绘制他的全部平面多边形表-面的投影，也便是绘制这一些多边形的边和极点的投影呀。罕见的有棱柱和棱锥两种啦。
I. Planar stereo
1. Stereoscopic can be divided into two categories: flat stereoscopic whose surfaces are all flat and curved stereoscopic whose surfaces are curved or curved and flat.
2. The surface of a planar stereo is a number of planar polygons, so that the projection of a planar stereo can be reduced to the projection of the surface of all its planar polygons, that is, the projection of the sides and vertices of these polygons. Two common types are prisms and prismatic cones.
棱柱由2个形态.长短一样且平行的顶.底面和若干个矩形棱面围成呀。The prism is enclosed by two top and bottom faces of the same shape, size and parallel, and a number of rectangular prism faces.
棱锥是由一位多边形底面和若干个共极点的三角形棱面所围成的了。从棱锥极点究竟面的差距叫做棱锥的高呢。当棱锥底面为正多边形，各棱面是全等的等腰三角形时，称之为正棱锥了。A prism is enclosed by a polygonal base and a number of triangular prism faces with a common vertex. The distance from the apex of the prism to the base is called the height of the prism. When the base of a prism is a regular polygon and the prism faces are congruent isosceles triangles, it is called a regular prism.
No.2曲面立-体
1.反转展转面的造成
反转展转面能够看做是一随意动线（母线）绕必定直线（轴线）转动一周后造成的曲面拉。如圆柱面，圆锥面，面等拉。
2.罕见反转展转体
罕见的反转展转体有圆柱体，圆锥体和圆体等呀。
关于反转展转体的反转展转面，若按某一投射方位看，有一部分可见，有一部分不可见，把其可见与不可见的分界线称为转向线呀。
1. The formation of a rotary surface
A rotary surface can be seen as an arbitrary line of motion (bus) around a certain line (axis) after a week of rotation to form the surface. Such as cylindrical surface, conical surface, spherical surface, etc.
2. Common rotating bodies
Common rotating bodies are cylinders, cones and spheres.
For the rotary surface of the body, if a certain projection direction, part of the visible, part of the invisible, the visible and invisible line of demarcation is called the steering line.
圆柱表-面有圆柱面，顶面和底面呀。圆柱面由直线绕与她平行的轴线转动而成了。The cylindrical surface has a cylindrical face, a top face and a bottom face. The cylindrical surface is formed by rotating a straight line around an axis parallel to it.
圆锥的表-面有圆锥面和底面拉。圆锥面由直线绕与他结交的轴线转动而成呀。The surface of a cone has a conical face and a base. The conical surface is formed by rotating a straight line around an axis that intersects it.
的表-面是面拉。面由圆绕其直径为轴线转动而成啦。The surface of a ball is a sphere. The spherical surface consists of a circle rotating around its diameter as its axis.
环的表-面是环面啦。环面由圆绕圆平面上不与圆心共线且在圆外的直线为轴转动而成啦。The surface of a ring is the ring surface. The ring surface consists of a circle rotating on its axis around a line in the circular plane that is not co-linear with the centre of the circle and is outside the circle.
参考资料笔墨百度；图片微博；翻译百度翻译
本文由LearningYard新学苑原创，部-分图片笔墨来源互联网，如有侵权请联络了。
对于Apex入侵投影和Apex全息投影的一些题，本文解完毕，希望对大家有所帮助。
No Comment