Autotek autocad raster design 2010 用户手册

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vrect

The Circle tool converts raster circles to vector circles. Select a raster circle and
ProdNameShort creates vector that matches its geometry.

Depending on the settings you have specified on VTools General tab on the
Raster Design Options dialog box, the Circle tool can even remove the
underlying raster circle when you exit the command. For more information,
see 

 (page 362).

There are four methods of defining raster circles:

■

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

■

Center multi-pick method converts any type of raster circle by selecting
the center point and any point on the circumference of the circle.

■

2P multi-pick method converts a raster circle by selecting two points to
define the diameter of the circle.

■

3P multi-pick method converts a raster circle by selecting three points on
the circle.

Once ProdNameShort has vectorized a circle, you can:

■

Vectorize another circle using any of the four selection methods discussed
above.

■

Verify or edit the center, radius, or diameter of the circle. You can specify
new values by numeric entry or by clicking another circle in the drawing
that has an attribute you want to match. This matching operation is

Vectorizing Raster Circles | 213