Autodesk 00308-011408-9F30A - VLA AUTOSKETCH R8-MEDIA W9X/NT, Руководство пользователя, Страница: 157 / 400

Drawing Regular Polygons
|
147
Drawing Regular Polygons
A regular polygon has segments of equal length. A regular polygon can be an
equilateral triangle, or have many segments. You might use a regular polygon
to draw the head of a hex bolt, or to draw the outline of a stop sign.
AutoSketch draws a regular polygon in relation to an invisible reference
circle. It is either inscribed inside the circle or circumscribed around it. The one
you choose depends on whether you need to specify the corners of the poly-
gon or the sides. To specify the corners of a polygon, click inscribed.
To specify the sides, click circumscribed.
AutoSketch provides four ways to draw regular polygons by specifying:
■
a centerpoint and either a vertex point or a side midpoint
■
opposite corners or sides
■
two adjacent corners or sides
■
a center and the radius of the reference circle
As you draw a regular polygon, a text box for the width of the segments, a
drop-down list box specifying inscribed or circumscribed polygon, and
another specifying the number of segments appear on the edit bar. If you use
the Regular: Center, Radius command to draw a polygon, a text box appears
on the edit bar so you can enter the radius.
When you select an existing regular polygon, AutoSketch displays controls
on the edit bar that allow you to change the width of all the segments of the
polygon, the x- and y- coordinates of the centerpoint, the reference circle
radius, whether it is inscribed or circumscribed, the number of segments, and
the rotation angle. For information on changing the start width, end width,
or bulge factor of a polygon segment, see “Editing the Properties of a Polyline
or Polygon Segment” on page 305.