AutoCAD provides some ways of making interesting surfaces. They all require 2D or 3D Polylines. Draw the plines, then get the Surfaces Toolbar, or find them in the Draw, Surfaces drop down menu. They are limited by two variables; Surftab1, and Surftab2 which control the number of 3D Faces generated. If the surface you get is wrong, erase it, change the Surftabs and try again.
This AutoCAD 3d modelling tutorial shows you how to design your house using the basic tools available on autocad. In this exercise you have used the following commands :
Drawing : Line, Arc, Circle, 3dFace, 3Dsurfaces – a cone, Polyline
Editing : Erase, Explode, Move, Offset, Fillet, Region
Viewing : Zoom, Viewports, 3Dviews, 3dOrbit, Hide, Shade
You have also made Viewports, and switched between Modelspace and Paperspace. You have used the Properties box to edit the Thickness of lines, arcs and circles. Most importantly, you have learned to change UCS so that you can draw in several planes.
In the end you should be able to model almost anything!
Download 3D Modelling in AutoCAD
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