POLYLINE

100

Subclass marker (AcDb2dPolyline or AcDb3dPolyline)

66

Obsolete; formerly an “entities follow flag” (optional; ignore if present)

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 = 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)