SOLID
ENTITIES Section
SUN
The following group codes apply to spline
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.
|
Spline
group codes
|
|
Group code
|
Description
|
|
100
|
Subclass
marker (AcDbSpline)
|
|
210
|
Normal
vector (omitted if the spline is nonplanar)
DXF: X value;
APP: 3D vector
|
|
220, 230
|
DXF: Y and Z values
of normal vector (optional)
|
|
70
|
Spline
flag (bit coded):
1 = Closed
spline
2 = Periodic spline
4 = Rational
spline
8 = Planar
16 = Linear
(planar bit is also set)
|
|
71
|
Degree
of the spline curve
|
|
72
|
Number
of knots
|
|
73
|
Number
of control points
|
|
74
|
Number
of fit points (if any)
|
|
42
|
Knot tolerance
(default = 0.0000001)
|
|
43
|
Control-point
tolerance (default = 0.0000001)
|
|
44
|
Fit tolerance
(default = 0.0000000001)
|
|
12
|
Start tangent—may
be omitted (in WCS)
DXF: X value;
APP: 3D point
|
|
22, 32
|
DXF: Y and Z values
of start tangent—may be omitted (in WCS)
|
|
13
|
End tangent—may
be omitted (in WCS)
DXF: X value;
APP: 3D point
|
|
23, 33
|
DXF: Y and Z values
of end tangent—may be omitted (in WCS)
|
|
40
|
Knot value
(one entry per knot)
|
|
41
|
Weight
(if not 1); with multiple group pairs, they are present if all are
not 1
|
|
10
|
Control
points (in WCS); one entry per control point
DXF: X value;
APP: 3D point
|
|
20, 30
|
DXF: Y and Z values
of control points (in WCS); one entry per control point
|
|
11
|
Fit points
(in WCS); one entry per fit point
DXF: X value;
APP: 3D point
|
|
21, 31
|
DXF: Y and Z values
of fit points (in WCS); one entry per fit point
|