Chapter 6 -- ENTITIES Section
HATCH
Boundary Path Data

The boundary of each hatch object is defined by a path (or loop) that consists of one or more segments. Path segment data varies depending on the entity type (or types) that make up the path. Each path segment is defined by its own set of group codes. For information about abbreviations and formatting used in this table, see "Formatting Conventions in This Reference."

Hatch boundary path data group codes
Group codes Description

92

Boundary path type flag (bit coded):
0 = Default; 1 = External; 2 = Polyline;
4 = Derived; 8 = Textbox; 16 = Outermost

varies


Polyline boundary type data (only if boundary = polyline).
See Polyline boundary data table below.

93

Number of edges in this boundary path (only if boundary is not a polyline)

72

Edge type (only if boundary is not a polyline):
1 = Line; 2 = Circular arc; 3 = Elliptic arc; 4 = Spline

varies


Edge type data (only if boundary is not a polyline). See appropriate Edge data table below.

97

Number of source boundary objects

330

Reference to source boundary objects (multiple entries)

Polyline boundary data group codes
Group codes Description

72

Has bulge flag

73

Is closed flag

93

Number of polyline vertices

10

Vertex location (in OCS)
DXF: X value; APP: 2D point (multiple entries)

20

DXF: Y value of vertex location (in OCS) (multiple entries)

42

Bulge (optional, default = 0)

Line edge data group codes
Group codes Description

10

Start point (in OCS)
DXF: X value; APP: 2D point

20

DXF: Y value of start point (in OCS)

11

End point (in OCS)
DXF: X value; APP: 2D point

21

DXF: Y value of end point (in OCS)

Arc edge data group codes
Group codes Description

10

Center point (in OCS)
DXF: X value; APP: 2D point

20

DXF: Y value of center point (in OCS)

40

Radius

50

Start angle

51

End angle

73

Is counterclockwise flag

Ellipse edge data group codes
Group codes Description

10

Center point (in OCS)
DXF: X value; APP: 2D point

20

DXF: Y value of center point (in OCS)

11

End point of major axis relative to center point (in OCS)
DXF: X value; APP: 2D point

21

DXF: Y value of end point of major axis (in OCS)

40

Length of minor axis (percentage of major axis length)

50

Start angle

51

End angle

73

Is counterclockwise flag

Spline edge data group codes
Group codes Description

94

Degree

73

Rational

74

Periodic

95

Number of knots

96

Number of control points

40

Knot values (multiple entries)

10

Control point (in OCS)
DXF: X value; APP: 2D point

20

DXF: Y value of control point (in OCS)

42

Weights (optional, default = 1)