The modification of 3D models - Introduction to AutoCAD 2011: 2D and 3D Design - page 286

3D Surfaces

As surfaces can be formed using the Extrude tool on

lines and polylines. Two examples are given below in Figs 14.39 and 14.41.

mentioned on page 245

First example - 3D Surface ( Fig. 14.39 )

1. In the ViewCube/Top view, on a layer colour Magenta , construct the
polyline ( Fig. 14.31 ).

80

90 90

Fig. 14.31 First example - 3D Surface - polyline to be extruded

2. In the ViewCube/Isometric view, call the Extrude tool from the
Home/Modeling control and extrude the polyline to a height of 80 . The
result is shown in Fig. 14.32 .

Fig. 14.32 First example - 3D Surface

Second example - 3D Surface ( Fig. 14.41 )

1. In the To p view on a layer colour Blue construct the circle (Fig. 14.33)
using the Break tool break the circle as shown.