Autotek autocad raster design 2010 用户手册

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REM polygonal, rectangular, and diagonal region objects have grips on
each vertex and midpoint. You can reposition each vertex independently
of the others. If you reposition a midpoint grip, the affected segment is
broken into two segments. This operates like the Raster Design Image Mask
object. All other grip operations, such as scale and stretch, use AutoCAD
polyline grip behavior.

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A circular region object has five grips: one grip at the center of the circle
and four on the circumference. REM circular region objects behave like
AutoCAD circles. If you move the center grip, the entire circle moves. If
you move one of the grips on the circumference, the radius changes.

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A line primitive has three grips: one at each endpoint, and one in the
center. If you move the center grip, the entire object moves. Grip editing
a REM line is the same as editing an AutoCAD line.

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A circle primitive has five grips: one grip at the center of the circle and
four on the circumference. Grip editing a REM circle is the same as editing
an AutoCAD circle. If you move the center grip, the entire circle moves.
If you move one of the grips on the circumference, the radius changes.

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An arc primitive has three grips: one at each endpoint, and one at the
midpoint of the arc. Grip editing a REM arc is the same as editing an
AutoCAD arc.

1 Select the region object or primitive object you want to refine.

2 Right-click and click Refine Mode.

3 Use the grips to modify the geometry of the object to include or exclude

raster data.

4 Right-click and click Refine Mode to exit from refine mode.

If you select a region object or a primitive, you can switch to Refine Mode
to fine tune the geometry used for defining the REM object.

NOTE You can only switch to Refine Mode if the REM object is still associated
with the image.

190 | Chapter 7   Raster Entity Manipulation