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发表于 2003-5-7 19:47:14
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显示全部楼层
是在DXF This Reference的帮助文件中,找到Chapter 6 -- ENTITIES Section中的 LWPOLYLINE项(这是R2000的,其它版本可能有变化)
Lwpolyline group codes
Group code Description
100 Subclass marker (AcDbPolyline)
90 Number of vertices
70 Polyline flag (bit-coded); default is 0:
1 = Closed; 128 = Plinegen
43 Constant width (optional; default = 0). Not used if variable width (codes 40 and/or 41) is set
38 Elevation (optional; default = 0)
39 Thickness (optional; default = 0)
10 Vertex coordinates (in OCS), multiple entries; one entry for each vertex
DXF: X value; APP: 2D point
20 DXF: Y value of vertex coordinates (in OCS), multiple entries; one entry for each vertex
40 Starting width (multiple entries; one entry for each vertex) (optional; default = 0; multiple entries). Not used if constant width (code 43) is set
41 End width (multiple entries; one entry for each vertex) (optional; default = 0; multiple entries). Not used if constant width (code 43) is set
42 Bulge (multiple entries; one entry for each vertex) (optional; default = 0)
210 Extrusion direction (optional; default = 0, 0, 1)
DXF: X value; APP: 3D vector
220, 230 DXF: Y and Z values of extrusion direction (optional)
上面的43组码就是全局宽度,40是起点线段宽度,41是终点线段宽度。 |
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