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)