Transcript MultiLines.ppt

Introduction to
Multilines
Sacramento City College
Engineering Design Technology
Introduction to Multilines
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Drawing Multilines
A
multiline consists of between 1 and 16
parallel lines that act as one line.
 The
lines in the set of multilines are called
elements.
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Drawing Multilines
 Multilines
are commonly used for drawing
 Roads
 Walls
of buildings for architectural plans.
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Drawing Multilines
 The
MLINE command is accessed by:
 Picking
the Multiline button from the Draw
toolbar
 OR
 Picking
Multiline in the Draw pull-down menu
 OR
 Typing
ML or MLINE at the Command:
prompt.
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Drawing Multilines
 Three
commands relate to multilines:
 MLINE.
(ML)
 MLSTYLE.
 MLEDIT.
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Drawing Multilines
 The
MLSTYLE command
 Allows
you to create multilines.
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Drawing Multilines
 The
default multi-line style has:
 Two
elements (lines).
 Continuous line type.
 Is called STANDARD.
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Multiline Justification
 Justification
determines how the resulting
lines are offset.
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Multiline Justification
 Justification
 Can
be specified only once during a single
MLINE command sequence and
 Is based on a counterclockwise rotation
direction.
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Multiline Justification
 The
justification options are
 Top
 Zero
 Bottom
 TOP
is the default
 The
current value remains in effect until
changed.
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Top Justification
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Zero Justification
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Bottom Justification
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Multiline Justification
 To
change the justification
 Enter
J at the first prompt
 Enter the first letter of the desired justification
 Top
 Zero
 Bottom
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Multiline Justification
 The
justification setting is stored in the
AutoCAD CMLJUST system variable.
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Adjusting the Multiline Scale
 The
Scale option controls the multiplier for
the offset values specified in the MLSTYLE
command.
 The
multiplier is stored in the CMLSCALE
system variable.
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Adjusting the Multiline Scale

When the scale is 1, the distance between
multiline elements is equal to 1 times the offset
distance.
 If
the offset distance is 0.5, the distance between
multiline elements is 0.5 when the multiline scale is 1.
 If
the multiline scale is 2, the distance between
multiline elements is 1 (0.5 x 2).
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Adjusting the Multiline Scale
 For
zero justification,
 The
multiline elements are offset 0.5 units on
either side of the definition points picked.
 Example:
If the multiline scale is 2
 Top
and Bottom justification = 2 units offset
 Zero justification = 1 unit and -1 unit offset.
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Setting Your Own Multiline Style
 ML
Command Style option
 Allows
you to specify the current multiline
style.
 The
style must be saved before it can be
accessed.
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Setting Your Own Multiline Style
 Using
saved Multiline styles
 Type:
ML
 Type: ST - to access the style option,
 Type
the known multiline style name.
A
“?” lists all of the names of the multiline
styles.
 Typing a name of a multiline style that does
not exist, the Load multiline style from file
dialog box is displayed
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Setting Your Own Multiline Style
 Multilines
library.
are stored in the acad.mln file
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Setting Your Own Multiline Style
 You
can load the multiline style from
another file (not acad.lin).
 Custom
multilines can be purchased for
AutoCAD.
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Defining Multilines
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Multiline Styles
 Use
the MLSTYLE command to define
multilines.
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Multiline Styles
 The
by:
MLSTYLE command can be accessed
 Picking
the Multiline Style entry in the Format
pull-down menu
 OR
 Typing
MLSTYLE at the Command: prompt.
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Multiline Styles
 The
Multiline options are:
 Current:
 Name:
 Description:
 Load...
Button:
 Save... button.
 Add button.
 Rename button.
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Multiline Styles
 Current:
Text box.
 The
Current: text box makes the specified
multiline style current.
 Specifying a different style changes the
setting of the CMLSTYLE system variable.
 Until
you create a multiline style, the only
style available is STANDARD.
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Multiline Styles
 Name:Text
box.
 This
text box is used to enter the name for a
new style.
 Description:
Text box.
 An
optional description of your multiline style
may be entered in this text box.
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Multiline Styles
 Load...
button.
 This
button allows you to load a multiline style
from an external multiline definition file.
 Save...
 The
button.
Save... button is used to save a style to a
file.
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Multiline Styles
 Add
button.
 Pick
the Add button after entering a multiline
style name in the Name: text box.
 This adds the multiline style name to the list of
defined styles.
 Rename
 Pick
button.
this button to rename a multiline style.
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Creating A Multiline
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Element Properties Dialog Box
 Create
a new multiline style by
 1.
MLStyle
 2. Type name of new multiline
 “NewExample”
 3.
Click ADD
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Multiline Element Properties
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Element Properties Dialog Box
 Elements
Properties Dialog Box contains:
 Elements:
area.
 Add button.
 Delete button.
 Offset text box.
 Color... button.
 Linetype... button.
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Element Properties Dialog Box
 Elements:
 Displays
area.
the current:
 Offset.
 Color
 Linetype
 for
settings
each multiline element.
 Picking
one of the elements highlights the
items for modification.
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Element Properties Dialog Box
 Add
button.
 Add
a new element to the multiline definition.
 Delete
button.
 Deletes
a highlighted item in the Elements:
area.
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Element Properties Dialog Box
 Offset
text box.
 Enter
either a positive or negative offset value
for a highlighted element.
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Element Properties Dialog Box
 Color...
button.
 Accesses
the Select Color dialog box.
 Pick the color you wish to assign to the
highlighted element.
 After picking OK, the new color is displayed in
the image tile next to the Color... button.
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Element Properties Dialog Box
 Linetype...
button.
 Pick
the desired linetype from the Loaded
Linetypes list.
 Linetypes
must be loaded before they can be
used.
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Multiline Properties Options
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Multiline Properties Dialog Box
 The
Multiline Properties dialog box offers
additional options for customizing multiline
styles.
 Access
by:
 Picking
the Multiline Properties... button in the
Multiline Styles dialog box.
 See Figure 15-12.
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Multiline Properties Dialog Box
 You
can add the following to multi-line
elements
 Caps.
 Segment
joints.
 Background color.
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Multiline Properties Dialog Box
 Joints
 Are
lines that
 connect the vertices of adjacent multiline
elements.
 Joints are also called miters.
 Display
joints check box.
 This
check box turns the display of joints on
and off.
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Multiline Properties Dialog Box
 Caps
 Are
lines that
 Connect the vertices of the beginning or
ending points of the multiline elements.
 Caps
area.
 Controls
the placement of caps on multilines.
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Multiline Properties Dialog Box
 Caps
can be set at the
 Start
points
 Endpoints
 Both.
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Multiline Properties Dialog Box
 Arcs
can also be specified.
 Arcs can be set to connect the
 Ends
of the outermost elements only
 Pairs of interior elements
 Both the outer and interior elements.
 The arcs are drawn tangent to the elements
they connect.
 Specifying outermost arcs to be drawn
requires at least two multiline elements.
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Multiline Properties Dialog Box
 Angle:
Text Box
 Allows
you to change the angle of the caps
relative to the direction of the multiline
elements.
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Multiline Properties Dialog Box
 Fill
area.
 If
the check box labeled On is activated, the
multiline is filled with a solid fill pattern in the
color specified.
 Pick this check box to activate the Color...
button.
 You can leave the color set to BYLAYER or
change it by picking the Color... button.
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Multiline Styles
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Multiline Styles
 MLSTYLE
command
 Displays
the Multiline Styles dialog box.
 Use this box to define, edit, and save multiline
styles.
 Styles
can be saved to an external file so
they can be used in other drawings.
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Editing Multilines
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Editing Multilines
 The
MLEDIT command permits limited
editing operations for multiline objects.
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Editing Multilines
 Access
this command by
 Picking
Multiline... from the Modify pull-down
menu
 OR
 Entering
MLEDIT at the Command: prompt
 OR
 Picking
the Edit Multiline button in the Modify
toolbar.
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Editing Multilines
 The
Multiline Edit Tools dialog box is
displayed.
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Editing Multilines
 The
image buttons give you an example of
what to expect when using each editing
option.
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Editing Intersections
 Pick
a button to create the type of
intersection shown.
 The
name of the MLEDIT option is
displayed in the lower left comer of the
dialog box when you pick an image
button.
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Editing Intersections
 Closed
Cross.
 The
first multiline selected is called the
background. It remains unchanged.
 The second multiline selected is called the
foreground. It remains unchanged.
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Editing Intersections
 Note
that the trimming is apparent, not
actual. ( ! )
 This
means that the line visibility of the
background multiline is changed, but it is
still one multiline.
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Editing Intersections
U
to undo the intersection you have just
made.
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Editing Intersections
 Cross
editing options:
 Closed
Cross.
 Open Cross.
 Merged Cross.
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Editing Tees
 Other
Tee editing options:
 Closed
Tee
 Open Tee.
 Merged Tee.
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Editing Intersections
 Other
options:
 Corner
Joint.
 Add Vertex.
 Delete Vertex.
 Cut
Single.
 Cut All.
 Weld All.
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Editing Intersections
 Corner
Joint.
 Allows
you to create a corner joint between
two multilines.
 The first multiline is trimmed or extended to its
intersection with the second multiline.
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Editing Intersections
 Add
Vertex.
 Adds
a vertex to an existing multiline at the
location you pick.
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Editing Intersections
 Add
Vertex
 The
command sequence differs slightly from
the sequences used with the other MLEDIT
options.
 After you select the Add Vertex option and
pick OK, you are prompted with the following:
 Select mline: (pick a location on the
multilinefor the new vertex)
 Select mline or [Undo]: j
 Command:
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Editing Intersections
 Delete
Vertex.
 The
Delete Vertex option allows you to
remove a vertex from an existing multiline.
 The vertex closest to the location you pick is
deleted.
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