LWPOLYLINE
ENTITIES Section
MULTILEADER
The following group codes apply to mline
entities. In addition to the group codes described here, see Common Group Codes for Entities.
For information about abbreviations and formatting used in this
table, see Formatting Conventions in This
Reference.
|
Mline group
codes
|
|
Group code
|
Description
|
|
100
|
Subclass
marker (AcDbMline)
|
|
2
|
String
of up to 32 characters. The name of the style used for this mline.
An entry for this style must exist in the MLINESTYLE dictionary.
Do not
modify this field without also updating the associated entry in
the MLINESTYLE dictionary
|
|
340
|
Pointer-handle/ID
of MLINESTYLE object
|
|
40
|
Scale factor
|
|
70
|
Justification:
0 = Top; 1 = Zero; 2 = Bottom
|
|
71
|
Flags (bit-coded
values):
1 = Has at least one vertex (code 72 is greater
than 0)
2 = Closed
4 = Suppress
start caps
8 = Suppress end caps
|
|
72
|
Number
of vertices
|
|
73
|
Number
of elements in MLINESTYLE definition
|
|
10
|
Start point
(in WCS)
DXF: X value; APP: 3D point
|
|
20, 30
|
DXF: Y and Z values
of start point (in WCS)
|
|
210
|
Extrusion
direction (optional; default = 0, 0, 1)
DXF: X value;
APP: 3D vector
|
|
220, 230
|
DXF: Y and Z values
of extrusion direction (optional)
|
|
11
|
Vertex
coordinates (multiple entries; one entry for each vertex) DXF: X value;
APP: 3D point
|
|
21, 31
|
DXF: Y and Z values
of vertex coordinates
|
|
12
|
Direction
vector of segment starting at this vertex (multiple entries; one
for each vertex)
DXF: X value;
APP: 3D vector
|
|
22, 32
|
DXF: Y and Z values
of direction vector of segment starting at this vertex
|
|
13
|
Direction
vector of miter at this vertex (multiple entries: one for each vertex)
DXF: X value;
APP: 3D vector
|
|
23, 33
|
DXF: Y and Z values
of direction vector of miter
|
|
74
|
Number
of parameters for this element (repeats for each element in segment)
|
|
41
|
Element
parameters (repeats based on previous code 74)
|
|
75
|
Number
of area fill parameters for this element (repeats for each element
in segment)
|
|
42
|
Area fill
parameters (repeats based on previous code 75)
|
The group code 41 parameterization is a list
of real values, one real per group code 41. The list may contain
zero or more items. The first group code 41 value is the distance
from the segment vertex along the miter vector to the point where
the line element's path intersects the miter vector. The next group
code 41 value is the distance along the line element's path from
the point defined by the first group 41 to the actual start of the
line element. The next is the distance from the start of the line
element to the first break (or cut) in the line element. The successive
group code 41 values continue to list the start and stop points
of the line element in this segment of the mline. Linetypes do not
affect group 41 lists.
The group code 42 parameterization is also a
list of real values. Similar to the 41 parameterization, it describes
the parameterization of the fill area for this mline segment. The
values are interpreted identically to the 41 parameters and when
taken as a whole for all line elements in the mline segment, they define
the boundary of the fill area for the mline segment.
A common example of the use of the group code
42 mechanism is when an unfilled mline crosses over a filled mline
and mledit is used to cause the filled mline to appear unfilled
in the crossing area. This would result in two group 42s for each
line element in the affected mline segment; one for the fill stop and
one for the fill start.
The 2 group codes in mline entities and mlinestyle
objects are redundant fields. These groups should not be modified
under any circumstances, although it is safe to read them and use
their values. The correct fields to modify are as follows:
-
Mline
-
The 340 group in the same object, which indicates
the proper MLINESTYLE object.
-
Mlinestyle
-
The 3 group value in the MLINESTYLE dictionary,
which precedes the 350 group that has the handle or entity name
of the current mlinestyle.