Autotek autocad raster design 2010 用户手册

■

Enter u (Undo) to undo the last circle selected.

■

Press Enter to exit the command.

TIP Use raster snapping to make it easier to pick points on the raster entity you
are converting. For more information, see 

 (page

237).

Menu

Image  ➤  Vectorization Tools  ➤  Circle

Raster Design Toolbar

Command Line

vcircle

The Arc tool converts raster arcs to vector arcs. Select a raster arc and
ProdNameShort creates vector that matches its geometry.

Depending on the settings you have specified on the 

362) tab on the Raster Design Options dialog box, the Arc tool can even remove
the underlying raster when you exit the command.

There are three methods of defining raster arcs:

■

One-pick method detects a bitonal raster arc with a single click.

■

Center multi-pick method converts any type of raster arc by selecting a
center point, a start point, and an end point.

■

3P multi-pick method converts a raster arc by selecting three points along
the arc.

Vectorizing Raster Arcs | 215