Chapter 6 -- ENTITIES Section
POLYLINE

The following group codes apply to polyline 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."

Polyline group codes
Group codes Description

100

Subclass marker (AcDb2dPolyline or AcDb3dPolyline)

10

DXF: always 0
APP: a "dummy" point; the X and Y values are always 0, and the Z value is the polyline's elevation (in OCS when 2D, WCS when 3D)

20

DXF: always 0

30

DXF: polyline's elevation (in OCS when 2D, WCS when 3D)

39

Thickness (optional; default = 0)

70

Polyline flag (bit-coded); default is 0:
1 = This is a closed polyline (or a polygon mesh closed in the
M direction).
2 = Curve-fit vertices have been added.
4 = Spline-fit vertices have been added.
8 = This is a 3D polyline.
16 = This is a 3D polygon mesh.
32 = The polygon mesh is closed in the N direction.
64 = The polyline is a polyface mesh.
128 = The linetype pattern is generated continuously around the vertices of this polyline.

40

Default start width (optional; default = 0)

41

Default end width (optional; default = 0)

71

Polygon mesh M vertex count (optional; default = 0)

72

Polygon mesh N vertex count (optional; default = 0)

73

Smooth surface M density (optional; default = 0)

74

Smooth surface N density (optional; default = 0)

75

Curves and smooth surface type (optional; default = 0); integer codes, not bit-coded:
0 = No smooth surface fitted
5 = Quadratic B-spline surface
6 = Cubic B-spline surface
8 = Bezier surface

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)

Xdata with the "AUTOCAD_POSTSCRIPT_FIGURE" application ID may follow a polyline entity. This contains information related to PostScript images and PostScript fill information.


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