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
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
|
function export_povray( CSX, filename, options )
% export_povray( CSX, filename, options )
%
% Exports the geometry defined in CSX to filename as a povray file.
%
% CSX: CSX-object created by InitCSX()
% filename: export filename (e.g. '/tmp/export.pov')
% options (optional): struct
% .camera: (string) use this as the camera definition line
% 1 camera on positive x-axis
% 2 camera on positive y-axis
% 3 camera on positive z-axis
% .light: (string) use this as the light definition line
% 1 point light at camera position
% .header: (string) add this to the header of the file
% .ignore: (cell array) ignore these CSX-properties
% .obj_modifier: struct
% .<propname>: (string) povray object modifier for corresponding primitives
% example: options.obj_modifier.copper = 'pigment { color rgbt <0.8,0.5,0,0> }';
%
% See also InitCSX
% CSXCAD matlab interface
% -----------------------
% author: Sebastian Held <sebastian.held@gmx.de>
% 12. Jun 2010: initial version
if nargin < 3
options = [];
end
fid = fopen( filename, 'w' );
% write header
fprintf( fid, '%s\n', '// povray-file exported by openEMS' );
fprintf( fid, '%s\n', '#include "colors.inc"' );
fprintf( fid, '%s\n', '#include "metals.inc"' );
fprintf( fid, '%s\n', '#include "textures.inc"' );
fprintf( fid, '%s\n', '#include "transforms.inc"' );
fprintf( fid, '%s\n', 'background { color rgb<1.000000,1.000000,1.000000> }' );
if isfield(options,'header')
fprintf( fid, '%s\n', header );
end
if isfield(CSX.Properties,'Material')
% process material
Material = CSX.Properties.Material;
process_primitives( fid, Material, 'pigment { color rgbt <0.000, 0.533, 0.800,0.0> } finish { diffuse 0.6 }', options );
end
if isfield(CSX.Properties,'Metal')
% process PEC
Metal = CSX.Properties.Metal;
process_primitives( fid, Metal, 'texture { Copper_Metal }', options );
end
% create coordinate system vectors (for debugging)
debug_coords = 0;
if debug_coords
fprintf( fid, [...
'#macro Axis_( AxisLen, RedTexture,WhiteTexture) \n' ...
'union{\n' ...
' cylinder {<0,-AxisLen,0>,<0,AxisLen,0>,0.5\n' ...
' texture{checker texture{RedTexture} \n' ...
' texture{WhiteTexture}\n' ...
' translate<0.1,0,0.1>}}\n' ...
' cone{<0,AxisLen,0>,2,<0,AxisLen+0.7,0>,0\n' ...
' texture{RedTexture}}\n' ...
' } // end of union \n' ...
'#end // of macro "Axis( )"\n' ...
'\n' ...
'#macro AxisXYZ( AxisLenX, AxisLenY, AxisLenZ, TexRed, TexWhite)\n' ...
'union{\n' ...
' object{Axis_(AxisLenX, TexRed, TexWhite) rotate< 0,0,-90>} // x axis\n' ...
' object{Axis_(AxisLenY, TexRed, TexWhite) rotate< 0,0, 0>} // y axis \n' ...
' object{Axis_(AxisLenZ, TexRed, TexWhite) rotate<90,0, 0>} // z axis\n' ...
' text{ ttf"timrom.ttf", "x", 0.15, 0 texture{TexRed} \n' ...
' scale 10 translate <AxisLenX+0.05,0.4,-0.10>}\n' ...
' text{ ttf"timrom.ttf", "y", 0.15, 0 texture{TexRed} \n' ...
' scale 10 translate <-0.75,AxisLenY+0.50,-0.00>}\n' ...
' text{ ttf"timrom.ttf", "z", 0.15, 0 texture{TexRed} \n' ...
' scale 10 translate <-0.75,0.2,AxisLenZ+0.50>}\n' ...
' scale <1000,1000,1000>\n' ...
'} // end of union\n' ...
'#end// of macro\n' ...
'\n' ...
'object{AxisXYZ( 10, 10, 10, texture{ pigment{rgb<1,0,0>} finish{ phong 1}}, texture{ pigment{rgb<1,1,1>} finish{ phong 1}} )}\n' ...
''] );
end
% create camera and light
xmin = min(CSX.RectilinearGrid.XLines);
xmax = max(CSX.RectilinearGrid.XLines);
ymin = min(CSX.RectilinearGrid.YLines);
ymax = max(CSX.RectilinearGrid.YLines);
zmin = min(CSX.RectilinearGrid.ZLines);
zmax = max(CSX.RectilinearGrid.ZLines);
center = [(xmin+xmax)/2 (ymin+ymax)/2 (zmin+zmax)/2];
% default camera
camera_pos = [center(1), ymin, zmax+sqrt((xmax-xmin)^2+(ymax-ymin)^2)];
camera = ['camera {location ' pov_vect(camera_pos) ' right <-1.33,0,0> look_at ' pov_vect(center) ' angle 40}']; % right-handed coordinate system
if isfield(options,'camera')
if ischar(options.camera)
camera = options.camera;
elseif options.camera == 1
% looking from positive x-axis
camera_pos = [xmax+sqrt((ymax-ymin)^2+(zmax-zmin)^2), 0, 0];
camera = ['camera {location ' pov_vect(camera_pos) ' right <-1.33,0,0> look_at ' pov_vect(center) ' angle 40}'];
elseif options.camera == 2
% looking from positive y-axis
camera_pos = [0, ymax+sqrt((xmax-xmin)^2+(zmax-zmin)^2), 0];
camera = ['camera {location ' pov_vect(camera_pos) ' right <-1.33,0,0> look_at ' pov_vect(center) ' angle 40}'];
elseif options.camera == 3
% looking from positive z-axis
camera_pos = [0, 0, zmax+sqrt((xmax-xmin)^2+(ymax-ymin)^2)];
camera = ['camera {location ' pov_vect(camera_pos) ' right <-1.33,0,0> look_at ' pov_vect(center) ' angle 40}'];
end
end
fprintf( fid, '%s\n', camera );
% default light
light = 'light_source { <3500,-3500,10000> White area_light <10000, 0, 0>, <0, 10000, 0>, 2, 2 adaptive 1 }';
if isfield(options,'light')
if ischar(options.light)
light = options.light;
elseif options.light == 1
% point light at position of camera
light = ['light_source { ' pov_vect(camera_pos) ', rgb <1,1,1> }'];
end
end
fprintf( fid, '%s\n', light );
fclose( fid );
% -----------------------------------------------------------------------------
function str = pov_vect( vec )
if numel(vec) == 3
str = ['<' num2str(vec(1)) ',' num2str(vec(2)) ',' num2str(vec(3)) '>'];
else
str = ['<' num2str(vec(1)) ',' num2str(vec(2)) '>'];
end
% -----------------------------------------------------------------------------
function str = primitive_box( CSX_box, options )
start = [CSX_box.P1.ATTRIBUTE.X CSX_box.P1.ATTRIBUTE.Y CSX_box.P1.ATTRIBUTE.Z];
stop = [CSX_box.P2.ATTRIBUTE.X CSX_box.P2.ATTRIBUTE.Y CSX_box.P2.ATTRIBUTE.Z];
if any( start == stop )
% 2D box
% povray supports 2D polygons, but has no priority concept, therefore use the box primitive
epsilon = 1; % FIXME this should be small compared to any other linear dimension of any object in the scene
epsilon = (start == stop) * epsilon; % select identical components
start = start - epsilon;
stop = stop + epsilon;
end
str = ['box { ' pov_vect(start) ', ' pov_vect(stop) ' ' options '}'];
% -----------------------------------------------------------------------------
function str = primitive_cylinder( CSX_cylinder, options )
start = [CSX_cylinder.P1.ATTRIBUTE.X CSX_cylinder.P0.ATTRIBUTE.Y CSX_cylinder.P1.ATTRIBUTE.Z];
stop = [CSX_cylinder.P2.ATTRIBUTE.X CSX_cylinder.P1.ATTRIBUTE.Y CSX_cylinder.P2.ATTRIBUTE.Z];
radius = CSX_cylinder.ATTRIBUTE.Radius;
str = ['cylinder { ' pov_vect(start) ', ' pov_vect(stop) ', ' num2str(radius) ' ' options '}'];
% -----------------------------------------------------------------------------
function str = primitive_wire( CSX_wire, options )
radius = CSX_wire.ATTRIBUTE.WireRadius;
str = ['sphere_sweep { linear_spline, ' num2str(numel(CSX_wire.Vertex))];
for a=1:numel(CSX_wire.Vertex)
% iterate over all vertices
v = [CSX_wire.Vertex{a}.ATTRIBUTE.X CSX_wire.Vertex{a}.ATTRIBUTE.Y CSX_wire.Vertex{a}.ATTRIBUTE.Z];
str = [str ', ' pov_vect(v) ', ' num2str(radius)];
end
str = [str ' ' options '}'];
% -----------------------------------------------------------------------------
function str = primitive_polygon( CSX_polygon, options )
Elevation = -CSX_polygon.ATTRIBUTE.Elevation;
% NormDir = CSX_polygon.ATTRIBUTE.NormDir;
epsilon = 1; % FIXME this should be small compared to any other linear dimension of any object in the scene
str = ['prism { linear_spline linear_sweep ' num2str(Elevation - epsilon) ', ' num2str(Elevation + epsilon) ', ' num2str(numel(CSX_polygon.Vertex)+1)];
for a=1:numel(CSX_polygon.Vertex)
% iterate over all vertices
v = [CSX_polygon.Vertex{a}.ATTRIBUTE.X1 CSX_polygon.Vertex{a}.ATTRIBUTE.X2];
str = [str ', ' pov_vect(v)];
end
v = [CSX_polygon.Vertex{1}.ATTRIBUTE.X1 CSX_polygon.Vertex{1}.ATTRIBUTE.X2]; % close prism
str = [str ', ' pov_vect(v)];
% str = [str ' ' options ' Point_At_Trans(' pov_vect(NormDir) ')}']; % needs transforms.inc
str = [str ' ' options ' rotate<-90,0,0> }'];
% -----------------------------------------------------------------------------
function process_primitives( fid, prop, default_obj_modifier, options )
ignore = {};
if isfield(options,'ignore'), ignore = options.ignore; end
for num=1:numel(prop)
Name = prop{num}.ATTRIBUTE.Name;
if any( strcmp(Name,ignore) )
disp( ['omitting ' Name '...'] );
continue
end
obj_modifier = default_obj_modifier;
if isfield(options,'obj_modifier') && isfield(options.obj_modifier,Name)
obj_modifier = options.obj_modifier.(Name);
end
disp( ['processing ' prop{num}.ATTRIBUTE.Name '...'] );
fprintf( fid, '%s\n', ['// ' Name] );
if isfield(prop{num}.Primitives,'Box')
for a=1:numel(prop{num}.Primitives.Box)
% iterate over all boxes
Box = prop{num}.Primitives.Box{a};
str = primitive_box( Box, obj_modifier );
fprintf( fid, '%s\n', str );
end
end
if isfield(prop{num}.Primitives,'Cylinder')
for a=1:numel(prop{num}.Primitives.Cylinder)
% iterate over all cylinders
Cylinder = prop{num}.Primitives.Cylinder{a};
str = primitive_cylinder( Cylinder, obj_modifier );
fprintf( fid, '%s\n', str );
end
end
if isfield(prop{num}.Primitives,'Wire')
for a=1:numel(prop{num}.Primitives.Wire)
% iterate over all wires
Wire = prop{num}.Primitives.Wire{a};
str = primitive_wire( Wire, obj_modifier );
fprintf( fid, '%s\n', str );
end
end
if isfield(prop{num}.Primitives,'Polygon')
for a=1:numel(prop{num}.Primitives.Polygon)
% iterate over all polygons
Polygon = prop{num}.Primitives.Polygon{a};
str = primitive_polygon( Polygon, obj_modifier );
fprintf( fid, '%s\n', str );
end
end
end
|
