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@@ -33,7 +33,7 @@ int add_polyline(struct dxf_file *dxf, struct Map_info *Map)
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strcpy(layer, UNIDENTIFIED_LAYER);
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- /* read in lines and processes information until a 0 is read in */
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+ /* read in lines and process information until a 0 is read in */
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while ((code = dxf_get_code(dxf)) != 0) {
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if (code == -2)
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return -1;
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@@ -49,30 +49,22 @@ int add_polyline(struct dxf_file *dxf, struct Map_info *Map)
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break;
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case 70: /* polyline flag */
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polyline_flag = atoi(dxf_buf);
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-
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/*******************************************************************
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- Bit Meaning
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- 1 This is a closed Polyline (or a polygon
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- mesh closed in the M direction)
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- 2 Curve-fit vertices have been added
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- 4 Spline-fit vertices have been added
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- 8 This is a 3D Polyline
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- 16 This is a 3D polygon mesh. Group 75 indi-
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- cates the smooth surface type, as follows:
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-
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- 0 = no smooth surface fitted
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- 5 = quadratic B-spline surface
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- 6 = cubic B-spline surface
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- 8 = Bezier surface
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-
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- 32 The polygon mesh is closed in the N direc-
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- tion
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- 64 The polyline is a polyface mesh
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+ Polyline flag (bit-coded); default is 0:
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+ 1 = This is a closed polyline (or a polygon mesh closed in
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+ the M direction).
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+ 2 = Curve-fit vertices have been added.
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+ 4 = Spline-fit vertices have been added.
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+ 8 = This is a 3D polyline.
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+ 16 = This is a 3D polygon mesh.
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+ 32 = The polygon mesh is closed in the N direction.
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+ 64 = The polyline is a polyface mesh.
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+ 128 = The linetype pattern is generated continuously around
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+ the vertices of this polyline.
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******************************************************************/
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/* NOTE: code only exists for flag = 1 (closed polyline) or 0 */
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G_debug(1, "polyline_flag: %d", polyline_flag);
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- if (polyline_flag & 8 || polyline_flag & 16 || polyline_flag & 17
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- || polyline_flag & 32)
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+ if (polyline_flag & (8 | 16 | 32))
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if (warn_flag70) {
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if (!flag_list)
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G_warning(_("3-d data in dxf file. Polyline_flag: %d"),
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@@ -143,20 +135,18 @@ int add_polyline(struct dxf_file *dxf, struct Map_info *Map)
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break;
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case 70: /* vertex flag */
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vertex_flag = atoi(dxf_buf);
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-
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/*******************************************************************
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- Bit Meaning
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- 1 Extra vertex created by curve fitting
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- 2 Curve fit tangent defined for this vertex.
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- A curve fit tangent direction of 0 may be
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- omitted from the DXF output, but is signif-
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- icant if this bit is set.
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- 4 Unused (never set in DXF files)
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- 8 Spline vertex created by spline fitting
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- 16 Spline frame control point
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- 32 3D Polyline vertex
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- 64 3D polygon mesh vertex
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- 128 Polyface mesh vertex
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+ Vertex flags:
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+ 1 = Extra vertex created by curve-fitting
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+ 2 = Curve-fit tangent defined for this vertex. A curve-fit tangent
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+ direction of 0 may be omitted from DXF output but is
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+ significant if this bit is set.
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+ 4 = Not used
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+ 8 = Spline vertex created by spline-fitting
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+ 16 = Spline frame control point
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+ 32 = 3D polyline vertex
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+ 64 = 3D polygon mesh
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+ 128 = Polyface mesh vertex
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******************************************************************/
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if (vertex_flag == 16) {
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/* spline frame control point: don't draw it! */
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Huidae Cho