将 SPLINE 添加到 DXF 会使文件损坏（内容未显示）
Adding SPLINE to DXF makes the file corrupt (content not shown)
我正在使用自己的 DXF 编写器，因为我只需要某些元素（例如 LINE、POLYLINE、POINT 和 SPLINE）。
我从 tfpdxfbridge 开始，我的想法是也包括 SPLINE 支持。当我尝试手动将 SPLINE 添加到 *.dxf 文件中的 ENTITIES 时，该文件不再打开。样条曲线示例：
SPLINE
5
274
330
1F
100
AcDbEntity
8
0
100
AcDbSpline
210
0.0
220
0.0
230
1.0
70
8
71
3
72
9
73
5
74
0
42
0.0000000001
43
0.0000000001
40
0.0
40
0.0
40
0.0
40
0.0
40
1.0
40
2.0
40
2.0
40
2.0
40
2.0
10
747.2822841342859
20
1453.676625339077
30
0.0
10
1364.898523055965
20
2324.178049512178
30
0.0
10
2830.924436828291
20
1999.364085075557
30
0.0
10
1130.854480067877
20
862.5152127789023
30
0.0
10
2837.42565094653
20
791.0561394394999
30
0.0
0
有人知道问题出在哪里或如何使该文件再次工作吗？
这是用 tfpdxfbridge 生成的完整文件（显然除了 SPLINE 部分）。
0
SECTION
2
HEADER
999
Generator: TFPDxfWriteBridge
999
By jmpessoa@hotmail.com
9
$DIMASZ
40
0.1800
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$DIMTSZ
40
0
9
$DIMGAP
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$DIMEXO
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$DIMDLI
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0.38
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$DIMDLE
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0.0
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$DIMEXE
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0.1800
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$DIMTXT
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$DIMTXTDIRECTION
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$DIMTAD
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0
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$DIMCLRD
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EOF
当我尝试恢复您的 DXF 文件时，我得到以下信息：
Unknown header variable $LINMAX ignored on line 116.
Undefined group code 330 for object on line 1018.
Invalid or incomplete DXF input -- drawing discarded.
在你的 DXF 中你有：
330
1F
当我自己制作样条曲线并另存为 DXF 时，我发现 330 已包含在内。但是，330 是根据文档：
Soft-pointer ID/handle to owner dictionary (optional)
此 DXF 将无任何错误地恢复：
或许你可以做个比较
我正在使用自己的 DXF 编写器，因为我只需要某些元素（例如 LINE、POLYLINE、POINT 和 SPLINE）。
我从 tfpdxfbridge 开始，我的想法是也包括 SPLINE 支持。当我尝试手动将 SPLINE 添加到 *.dxf 文件中的 ENTITIES 时，该文件不再打开。样条曲线示例：
SPLINE
5
274
330
1F
100
AcDbEntity
8
0
100
AcDbSpline
210
0.0
220
0.0
230
1.0
70
8
71
3
72
9
73
5
74
0
42
0.0000000001
43
0.0000000001
40
0.0
40
0.0
40
0.0
40
0.0
40
1.0
40
2.0
40
2.0
40
2.0
40
2.0
10
747.2822841342859
20
1453.676625339077
30
0.0
10
1364.898523055965
20
2324.178049512178
30
0.0
10
2830.924436828291
20
1999.364085075557
30
0.0
10
1130.854480067877
20
862.5152127789023
30
0.0
10
2837.42565094653
20
791.0561394394999
30
0.0
0
有人知道问题出在哪里或如何使该文件再次工作吗？
这是用 tfpdxfbridge 生成的完整文件（显然除了 SPLINE 部分）。
0
SECTION
2
HEADER
999
Generator: TFPDxfWriteBridge
999
By jmpessoa@hotmail.com
9
$DIMASZ
40
0.1800
9
$DIMTSZ
40
0
9
$DIMGAP
40
0.0900
9
$DIMEXO
40
0.0625
9
$DIMDLI
40
0.38
9
$DIMDLE
40
0.0
9
$DIMEXE
40
0.1800
9
$DIMTXT
40
0.1800
9
$DIMTXTDIRECTION
70
0
9
$DIMTIH
70
1
9
$DIMTAD
70
0
9
$DIMCLRD
70
256
9
$DIMCLRE
70
256
9
$DIMCLRT
70
256
9
$DIMASO
70
1
9
$DIMASSOC
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2
9
$DIMSHO
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0
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$DIMLUNIT
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$DIMDEC
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$DIMADEC
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$INSBASE
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0.0
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0.0
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$EXTMIN
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0.0
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$EXTMAX
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$LINMIN
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$LINMAX
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EOF
当我尝试恢复您的 DXF 文件时，我得到以下信息：
Unknown header variable $LINMAX ignored on line 116.
Undefined group code 330 for object on line 1018.
Invalid or incomplete DXF input -- drawing discarded.
在你的 DXF 中你有：
330
1F
当我自己制作样条曲线并另存为 DXF 时，我发现 330 已包含在内。但是，330 是根据文档：
Soft-pointer ID/handle to owner dictionary (optional)
此 DXF 将无任何错误地恢复：
或许你可以做个比较