1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
|
## Copyright (C) 2016-2022 Philip Nienhuis
##
## This program is free software; you can redistribute it and/or modify it
## under the terms of the GNU General Public License as published by
## the Free Software Foundation; either version 3 of the License, or
## (at your option) any later version.
##
## This program is distributed in the hope that it will be useful,
## but WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
## GNU General Public License for more details.
##
## You should have received a copy of the GNU General Public License
## along with this program. If not, see <http://www.gnu.org/licenses/>.
## -*- texinfo -*-
## @deftypefn {} [@var{h}] = dxfdraw (@var{dxf})
## @deftypefnx {} [@var{h}] = dxfdraw (@var{dxf}, @var{clr})
## @deftypefnx {} [@var{h}] = dxfdraw (@dots{}, @var{name}, @var{value}, @dots{})
## Draw a map of a DXF file based on a DXF cell array or DXF drawing struct.
##
## Input argument @var{dxf} is the name of a DXF cell array (see
## dxfread.m), or the name of a DXF file, or a DXF drawing struct made
## by dxfparse.
##
## @var{clr} is the color used to draw the DXF contents. All lines and
## arcs are drawn in the same color; similar for all filled surfaces.
## For points, lines and polylines this can be a 3x1 RGB vector or a color
## code. For polygons it can be a 2x1 vector of color codes or a 2x3 double
## array of RGB entries. The default is [0.7 0.7 0.7; 0.8 0.9 0.99].
##
## In addition several graphics properties can be specified, e.g., linestyle
## and linewidth. No checks are performed whether these are valid for the
## entities present in the DXF cell array or file.
##
## Currently the following entities are supported: POINT, LINE, POLYLINE,
## LWPOLYLINE, CIRCLE, ARC and 3DFACE. For drawing CIRCLE and ARC entities
## functions from the geometry packge are required.
##
## Optional output argument @var{h} is the graphics handle of the resulting
## map.
##
## @seealso{dxfread, dxfparse}
## @end deftypefn
## Author: Philip Nienhuis <prnienhuis@users.sf.net>
## Created: 2016-01-25
function [h] = dxfdraw (dxf, clr=[0.7 0.7 0.7; 0.8 0.9 0.99], varargin)
if (isstruct (dxf))
## Cursory validation
fldnm = fieldnames (dxf);
if (! all (ismember({"i3d", "ic", "ia", "j3", "jr", "il", "ip"}, fldnm)))
error ("dxfdraw: invalid struct input for arg #1");
endif
else
if (isempty (dxf))
return
elseif (iscell (dxf))
## Cursory Q-checks: minumum 3 columns, col 1 & 3 numeric, col #2 character
if (size (dxf, 2) < 3 || ! all (all (cellfun (@isnumeric, dxf(:, [1, 3])))) ...
|| ! all (cellfun (@ischar, dxf(:, 2))))
error ("dxfdraw: input arg #1 does not look like a valid dxf cell array");
endif
elseif (ischar (dxf))
## Maybe a DXF file?
[~, ~, ext] = fileparts (dxf);
if (isempty (ext) || ! strcmpi (ext, ".dxf"))
## Just add a .dxf suffix
dxf = [dxf ".dxf"];
endif
fid = fopen (dxf);
if (fid < 0)
error ("File '%s' not found", dxf);
else
fclose (fid);
endif
## Read DXF file into DXF cell array
dxf = dxfread (dxf);
else
error (["dxfdraw: DXF cell array, DXF file name, or DXF drawing ", ...
"struct expected for arg #1 "]);
endif
## parse DXF cell array into a DXF drawing struct
dxf = dxfparse (dxf, 0);
endif
## We should have a valid struct now. Extract data
i3d = dxf.i3d;
is = dxf.is;
ir = dxf.ir;
ic = dxf.ic;
ia = dxf.ia;
j3 = dxf.j3;
jr = dxf.jr;
il = dxf.il;
ip = dxf.ip;
jf = dxf.jf;
jw = dxf.jw;
jl = dxf.jl;
XYZ = dxf.XYZ;
XYZp = dxf.XYZp;
XY = dxf.XY;
CIRCLES = dxf.CIRCLES;
ARCS = dxf.ARCS;
VRT3 = dxf.VRT3;
FAC3 = dxf.FAC3;
LWP = dxf.LWP;
LWV = dxf.LWV;
VRTS = dxf.VRTS;
FACP = dxf.FACP;
## dxf not needed from here, clear it as it may hold lots of RAM needed for plot
clear dxf;
h = figure ();
hold on;
axis equal;
if (i3d)
if (is > 0)
plot3 (XYZp(:, 1), XYZp(:, 2), XYZp(:, 3), "color", clr(1, :), varargin{:});
endif
if (ir > 0)
plot3 (XYZ(:, 1), XYZ(:, 2), XYZ(:, 3), "color", clr(1, :), varargin{:});
endif
if (ic > 0)
drawCircle3d (CIRCLES, "color", clr(1, :), varargin{:});
endif
if (ia > 0)
drawCircleArc3d (ARCS, "color", clr(1, :), varargin{:});
endif
if (j3 > 0)
patch ("vertices", VRT3, "faces", FAC3, "edgecolor", clr(1, :), ...
"facecolor", clr(2, :), varargin{:});
endif
else
if (is > 0)
plot (XYZp(:, 1), XYZp(:, 2), "color", clr(1, :), varargin{:});
endif
if (ir > 0)
plot (XYZ(:, 1), XYZ(:, 2), "color", clr(1, :), varargin{:});
endif
if (ic > 0)
drawCircle (CIRCLES, "color", clr(1, :), varargin{:});
endif
if (ia > 0)
drawCircleArc (ARCS, "color", clr(1, :), varargin{:});
endif
if (jr > 0)
plot (XY(:, 1), XY(:, 2), "color", clr(1, :), varargin{:});
endif
if (il > 0)
LWV(jw+1:end, :) = [];
LWV(LWV == 0) = NaN;
patch ("vertices", LWP, "faces", LWV, "edgecolor", clr(1, :), ...
"facecolor", clr(2, :), varargin{:});
endif
endif
if (ip > 0)
FACP(jf+1:end, :) = [];
FACP(FACP == 0) = NaN;
if (! i3d)
VRTS(:, 3) = [];
endif
patch ("vertices", VRTS, "faces", FACP, "edgecolor", clr(1, :), ...
"facecolor", clr(2, :), varargin{:});
endif
endfunction
|
