Autotek autocad raster design 2010 用户手册

particularly useful when you are vectorizing several circles of identical
diameter, or a set of concentric circles.

1 Click Image menu  ➤  Vectorization Tools  ➤  Circle.

The following prompt is displayed:

Specify one-pick point or [Center/2P/3P]:

2 Do one of the following:

■

Select a raster circle using the one-pick selection method.

■

Enter c (Center), then select the center point and a point along the
circumference of the circle.

■

Enter 2p, then select two points to define the diameter of the raster
circle.

■

Enter 3p, then select three points along the circumference to define
the circle.

The following prompt is displayed:

Specify one-pick point or [Center/2P/3P/Verify
center/Radius/Diameter/Undo]:

3 Do one of the following:

■

Select another circle to vectorize, using one of the methods described
in step 2.

■

Enter v (Verify center) to verify the center. Select a new location for
the center point, or type m and select another vector circle to match
the center point.

■

Enter r (Radius) to verify the radius. Select a new radius, type a new
radius at the command line, or type m and select another vector circle
to match the radius. Depending on the setting you selected in the
Raster Design Options dialog box, you can right click to select a radius
from a Most Recently Used list or a Most Frequently Used list.

■

Enter d (Diameter) to verify the diameter. Select a new diameter, enter
a new diameter at the command line, or enter m and select another
vector circle to match the diameter. Depending on the setting you
selected in the Raster Design Options dialog box, you can right-click
to select a diameter from a Most Recently Used list or a Most
Frequently Used list.

214 | Chapter 8   Converting Raster Entities to Vector