III.1 Solid
Creates solid-filled triangles and
quadrilaterals
Command line: solid
To create a 2D solid object
- At the Command prompt, enter solid.
- Specify the first point.
- Specify the second point, moving left to right.
- Continue to specify points. Press ENTER when the object is complete.
When you create a quadrilateral solid-filled area, the
sequence of the third and fourth points determines its shape. Compare the
following illustrations:
Notice that to create the quadrilateral area, both the top and bottom edges are
specified from left to right. If you specify the first point on the right and
the second point on the left, then the third and fourth points should also be
in a right-to-left direction. As you continue to specify pairs of points, be
sure to continue this zigzag sequence to ensure the results you expect.
III.2 FILL
Controls the filling of objects such as hatches,
two-dimensional solids, and wide polylines
Command
line: fill (or 'fill for
transparent use)
Enter mode
[ON/OFF] <current>: Enter on or off, or press ENTER
On
Turns on Fill mode. For the filling of a 3D object to be
visible, its extrusion direction must be parallel to the current viewing
direction, and hidden lines must not be suppressed.
Off
Turns off Fill mode. Only the outlines of objects are
displayed and plotted. Changing Fill mode affects existing objects after the
drawing is regenerated. The display of lineweights is not affected by the Fill
mode setting.
III.3 TRACE
Creat a line object with particular width.
Command
line: trace
Specify trace width <current>: Specify a
distance or press ENTER
Specify
start point: Specify a point (1)
Specify
next point: Specify a point (2)
Specify
next point: Specify a point (3) or press ENTER to end the command
The endpoints of
a trace are on the center
line and are always cut square. Trace automatically calculates the correct
bevels for connection to adjacent segments. AutoCAD delays drawing each segment
until you either specify the next segment or press ENTER. Because of the way
bevels are handled, Trace has no undo option.
Traces are solid
filled when Fill mode is on. When Fill mode is off, only the outline of a trace is displayed.
III.4 REGION
Regions are two-dimensional areas you create from closed
shapes or loops. Closed polylines, lines, and curves are valid selections.
Curves include circular arcs, circles, elliptical arcs, ellipses, and splines.
AutoCAD converts closed 2D and exploded planar 3D polylines in the selection
set to separate regions and then converts polylines, lines, and curves to form
closed planar loops (outer boundaries and holes of a region). If more than two
curves share an endpoint, the resulting region might be arbitrary.
Toolbar
Command
line: region
Select
objects: Use an
object selection method and press ENTER when you finish
III.5 PEDIT
Edits polylines and three-dimensional polygon meshes.
Command
line: pedit
Select
polyline or[Multiple]:Use an object selection method or enter m
By using pedit, the object is converted into a single-segment
2D polyline that you can edit. You can use this operation to join lines and
arcs into a polyline
Close : Creates
the closing segment of the polyline, connecting the last segment with the
first. AutoCAD considers the polyline open unless you close it using the Close
option.
The remaining prompts depend on
whether you have selected a 2D polyline, a 3D polyline, or 3D polygon mesh.
If the selected object is a line or
an arc, AutoCAD prompts:
Object
selected is not a polyline.
Do you want
it to turn into one? : Enter y or n, or press ENTER
Join
Adds lines,
arcs, or polylines to the end of an open polyline and removes the curve fitting
from a curve-fit polyline. For objects to join the polyline, their endpoints
must touch unless you use the Multiple option at the first PEDIT prompt. In this
case, you can join polylines that do not touch if the fuzz distance is set to a
value large enough to include the endpoints.
Select
objects: Use an object selection method
If you
previously selected multiple objects using the Multiple option, AutoCAD
displays the following prompt:
Enter fuzz
distance or [Jointype]<0 .0000="">: Enter a distance or j
Sets the method
of joining selected polylines.
Enter a
vertex editing option
Enter join
type [Extend/Add/Both}: Enter e, a, or b
Extend
Joins
the selected polylines by extending or trimming the segments to the nearest
endpoints.
Add
Joins
the selected polylines by adding a straight segment between the nearest
endpoints.
Both
Joins
the selected polylines by extending or trimming if possible. Otherwise joins
the selected polylines by adding a straight segment between the nearest
endpoints.
Command
line: rectang or rectangle
Specify first corner point or [Chamfer/Elevation/Fillet/Thickness/Width]: Enter an option or specify a point (1)
Specify
other corner point or [Dimensions]: Specify
a point (2)
Chamfer : Sets the chamfer distances for
the rectangle.
Elevation :
Specifies the elevation of the rectangle.
Fillet
: Specifies the fillet radius of the rectangle.
Thickness : Specifies the thickness of the rectangle.
Width : Specifies the polyline width of the
rectangle to be drawn.
III.7 POLYGON
Creates an equilateral closed polyline
Toolbar
Command
line: polygon
Enter
number of sides <current>: Enter a value between 3 and 1024 or press ENTER
Specify center of polygon or [Edge]: Specify a point (1) or enter
e
Center of polygon
Defines the
center of the polygon.
Enter an
option [Inscribed in circle/Circumscribed about circle]
: Enter i or c or press ENTER
Inscribed in Circle
Specifies the
radius of a circle on which all vertices of the polygon lie.
Specify
radius of circle: Specify a point (2) or enter a value
Specifying the
radius with your pointing device determines the rotation and size of the
polygon. Specifying the radius with a value draws the bottom edge of the
polygon at the current snap rotation angle.
Circumscribed
about Circle
Specifies the
distance from the center of the polygon to the midpoints of the edges of the
polygon.
Specify
radius of circle: Specify a distance
Specifying the
radius with your pointing device determines the rotation and size of the
polygon. Specifying the radius with a value draws the bottom edge of the
polygon at the current snap rotation angle.
Edge
Defines a polygon
by specifying the endpoints of the first edge.
Specify
first endpoint of edge: Specify a point (1)
Specify
second endpoint of edge: Specify a point (2)
III.8 POLYLINE
A polyline is a connected sequence of line
segments created as a single object. You can create straight line segments, arc
segments, or a combination of the two.
Toolbar
Command
line: pline
Specify
start point: Specify a point (1)
Current
line-width is
Specify
next point or [Arc/Close/Halfwidth/Length/Undo/Width]: Specify a
point (2) or enter an option
Create Arc Polylines
When you draw arc segments in a
polyline, the first point of the arc is the endpoint of the previous segment.
You can specify the angle, center point, direction, or radius of the arc. You
can also complete the arc by specifying a second point and an endpoint.
You can draw a closed polyline to
create a polygon. To close a polyline, specify the starting point of the last
side of the object, enter c (Close), and press ENTER.
You can draw polylines of various
widths by using the Width and Halfwidth options. You can set the width of
individual segments and make them taper gradually from one width to another.
These options become available after you specify a starting point for the
polyline.
The Width and Halfwidth options set
the width of the next polyline segments you draw. Zero (0) width produces a
thin line. Widths greater than zero produce wide lines, which are filled if
Fill mode is on and outlined if Fill mode is off. The Halfwidth option sets
width by specifying the distance from the center of the wide polyline to an
outside edge.
When you use the Width option, you
are prompted for both a starting and an ending width. By entering different
values, you can taper the polyline. The starting and ending points of wide
polyline segments are in the center of the line. Intersections of adjacent wide
segments are usually beveled. However, nontangent arc segments, acute angles,
or segments that use a dash-dot linetype are not beveled.
You can create a polyline from the
boundaries of overlapping objects that form a closed area. A polyline created
using the boundary method is a separate object, distinct from the objects used
to create it. You can edit it using the same methods used to edit other
polylines.
To expedite the boundary selection
process in large or complex drawings, you can specify a group of boundary
candidates, called a boundary set. You create this set by selecting the objects
you want to use define the boundary.
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