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 codesGroup codes  Description 
92 
Boundary path type flag (bit coded): 
varies 
Polyline boundary type data (only if boundary = polyline). 
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): 
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) 
Group codes  Description 
72 
Has bulge flag 
73 
Is closed flag 
93 
Number of polyline vertices 
10 
Vertex location (in OCS) 
20 
DXF: Y value of vertex location (in OCS) (multiple entries) 
42 
Bulge (optional, default = 0) 
Group codes  Description 
10 
Start point (in OCS) 
20 
DXF: Y value of start point (in OCS) 
11 
End point (in OCS) 
21 
DXF: Y value of end point (in OCS) 
Group codes  Description 
10 
Center point (in OCS) 
20 
DXF: Y value of center point (in OCS) 
40 
Radius 
50 
Start angle 
51 
End angle 
73 
Is counterclockwise flag 
Group codes  Description 
10 
Center point (in OCS) 
20 
DXF: Y value of center point (in OCS) 
11 
End point of major axis relative to center point (in OCS) 
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 
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) 
20 
DXF: Y value of control point (in OCS) 
42 
Weights (optional, default = 1) 