TRACE
ENTITIES Section
VERTEX
The
following group codes apply to underlays. 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.
Please note that UNDERLAY group codes are common
to DWFUNDERLAY and DGNUNDERLAY. The differentiation between DWFUNDERLAY
and DGN UNDERLAY occurs in group code 0, defining the object name.
|
Underlay group codes
|
|
Group code
|
Description
|
| 0 |
Object name. Defined as “DWFUNDERLAY” for DWFUNDERLAY entities,
or “DGNUNDERLAY” for DGNUNDERLAY entities. |
|
100
|
Subclass marker (AcDbUnderlayReference)
|
|
340
|
The ID of the AcDbUnderlayDefinition object
|
|
10,20,30
|
The X,Y, and Z coordinates
of the insertion point of the underlay. These are OCS/ECS coordinates
|
|
41,42,43
|
DXF: X, Y, and Z scale
factors
|
|
50
|
Rotation Angle (in OCS/ECS. CCW from the coordinate
system X axis and around the Z axis)
|
|
210,220,230
|
Normal vector (in WCS)
|
|
280
|
Flags
1 = Clipping is on
2 = Underlay is on
4 = Monochrome
8 = Adjust for background
|
|
281
|
Contrast (value between 20 and 100)
|
|
282
|
Fade (value between 0 and 80)
|
|
11, 21
|
Repeating: 2d points in OCS/ECS. If only two,
then they are the lower left and upper right corner points of a
clip rectangle. If more than two, then they are the vertices of
a clipping polygon
|