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1 | ///////////////////////////////////////////////////////////////////////////// |
2 | // Name: dxfrenderer.cpp | |
3 | // Purpose: DXF reader and renderer | |
4 | // Author: Sandro Sigala | |
5 | // Modified by: | |
6 | // Created: 2005-11-10 | |
7 | // RCS-ID: $Id$ | |
8 | // Copyright: (c) Sandro Sigala | |
9 | // Licence: wxWindows licence | |
10 | ///////////////////////////////////////////////////////////////////////////// | |
11 | ||
12 | // For compilers that support precompilation, includes "wx/wx.h". | |
13 | #include "wx/wxprec.h" | |
14 | ||
15 | #ifdef __BORLANDC__ | |
16 | #pragma hdrstop | |
17 | #endif | |
18 | ||
19 | #ifndef WX_PRECOMP | |
20 | #include "wx/wx.h" | |
21 | #endif | |
22 | ||
23 | #include "wx/wfstream.h" | |
24 | #include "wx/txtstrm.h" | |
25 | ||
26 | #if !wxUSE_GLCANVAS | |
27 | #error "OpenGL required: set wxUSE_GLCANVAS to 1 and rebuild the library" | |
28 | #endif | |
29 | ||
30 | #ifdef __WXMAC__ | |
31 | # ifdef __DARWIN__ | |
32 | # include <OpenGL/glu.h> | |
33 | # else | |
34 | # include <glu.h> | |
35 | # endif | |
36 | #else | |
37 | # include <GL/glu.h> | |
38 | #endif | |
39 | ||
40 | #include "dxfrenderer.h" | |
41 | ||
42 | #include <wx/listimpl.cpp> | |
412e0d47 DS |
43 | WX_DEFINE_LIST(DXFEntityList) |
44 | WX_DEFINE_LIST(DXFLayerList) | |
4b764db3 JS |
45 | |
46 | // Conversion table from AutoCAD ACI colours to RGB values | |
47 | static const struct { unsigned char r, g, b; } aci_to_rgb[256] = { | |
48 | /* 0 */ 255, 255, 255, | |
49 | /* 1 */ 255, 0, 0, | |
50 | /* 2 */ 255, 255, 0, | |
51 | /* 3 */ 0, 255, 0, | |
52 | /* 4 */ 0, 255, 255, | |
53 | /* 5 */ 0, 0, 255, | |
54 | /* 6 */ 255, 0, 255, | |
55 | /* 7 */ 255, 255, 255, | |
56 | /* 8 */ 128, 128, 128, | |
57 | /* 9 */ 192, 192, 192, | |
58 | /* 10 */ 255, 0, 0, | |
59 | /* 11 */ 255, 127, 127, | |
60 | /* 12 */ 204, 0, 0, | |
61 | /* 13 */ 204, 102, 102, | |
62 | /* 14 */ 153, 0, 0, | |
63 | /* 15 */ 153, 76, 76, | |
64 | /* 16 */ 127, 0, 0, | |
65 | /* 17 */ 127, 63, 63, | |
66 | /* 18 */ 76, 0, 0, | |
67 | /* 19 */ 76, 38, 38, | |
68 | /* 20 */ 255, 63, 0, | |
69 | /* 21 */ 255, 159, 127, | |
70 | /* 22 */ 204, 51, 0, | |
71 | /* 23 */ 204, 127, 102, | |
72 | /* 24 */ 153, 38, 0, | |
73 | /* 25 */ 153, 95, 76, | |
74 | /* 26 */ 127, 31, 0, | |
75 | /* 27 */ 127, 79, 63, | |
76 | /* 28 */ 76, 19, 0, | |
77 | /* 29 */ 76, 47, 38, | |
78 | /* 30 */ 255, 127, 0, | |
79 | /* 31 */ 255, 191, 127, | |
80 | /* 32 */ 204, 102, 0, | |
81 | /* 33 */ 204, 153, 102, | |
82 | /* 34 */ 153, 76, 0, | |
83 | /* 35 */ 153, 114, 76, | |
84 | /* 36 */ 127, 63, 0, | |
85 | /* 37 */ 127, 95, 63, | |
86 | /* 38 */ 76, 38, 0, | |
87 | /* 39 */ 76, 57, 38, | |
88 | /* 40 */ 255, 191, 0, | |
89 | /* 41 */ 255, 223, 127, | |
90 | /* 42 */ 204, 153, 0, | |
91 | /* 43 */ 204, 178, 102, | |
92 | /* 44 */ 153, 114, 0, | |
93 | /* 45 */ 153, 133, 76, | |
94 | /* 46 */ 127, 95, 0, | |
95 | /* 47 */ 127, 111, 63, | |
96 | /* 48 */ 76, 57, 0, | |
97 | /* 49 */ 76, 66, 38, | |
98 | /* 50 */ 255, 255, 0, | |
99 | /* 51 */ 255, 255, 127, | |
100 | /* 52 */ 204, 204, 0, | |
101 | /* 53 */ 204, 204, 102, | |
102 | /* 54 */ 153, 153, 0, | |
103 | /* 55 */ 153, 153, 76, | |
104 | /* 56 */ 127, 127, 0, | |
105 | /* 57 */ 127, 127, 63, | |
106 | /* 58 */ 76, 76, 0, | |
107 | /* 59 */ 76, 76, 38, | |
108 | /* 60 */ 191, 255, 0, | |
109 | /* 61 */ 223, 255, 127, | |
110 | /* 62 */ 153, 204, 0, | |
111 | /* 63 */ 178, 204, 102, | |
112 | /* 64 */ 114, 153, 0, | |
113 | /* 65 */ 133, 153, 76, | |
114 | /* 66 */ 95, 127, 0, | |
115 | /* 67 */ 111, 127, 63, | |
116 | /* 68 */ 57, 76, 0, | |
117 | /* 69 */ 66, 76, 38, | |
118 | /* 70 */ 127, 255, 0, | |
119 | /* 71 */ 191, 255, 127, | |
120 | /* 72 */ 102, 204, 0, | |
121 | /* 73 */ 153, 204, 102, | |
122 | /* 74 */ 76, 153, 0, | |
123 | /* 75 */ 114, 153, 76, | |
124 | /* 76 */ 63, 127, 0, | |
125 | /* 77 */ 95, 127, 63, | |
126 | /* 78 */ 38, 76, 0, | |
127 | /* 79 */ 57, 76, 38, | |
128 | /* 80 */ 63, 255, 0, | |
129 | /* 81 */ 159, 255, 127, | |
130 | /* 82 */ 51, 204, 0, | |
131 | /* 83 */ 127, 204, 102, | |
132 | /* 84 */ 38, 153, 0, | |
133 | /* 85 */ 95, 153, 76, | |
134 | /* 86 */ 31, 127, 0, | |
135 | /* 87 */ 79, 127, 63, | |
136 | /* 88 */ 19, 76, 0, | |
137 | /* 89 */ 47, 76, 38, | |
138 | /* 90 */ 0, 255, 0, | |
139 | /* 91 */ 127, 255, 127, | |
140 | /* 92 */ 0, 204, 0, | |
141 | /* 93 */ 102, 204, 102, | |
142 | /* 94 */ 0, 153, 0, | |
143 | /* 95 */ 76, 153, 76, | |
144 | /* 96 */ 0, 127, 0, | |
145 | /* 97 */ 63, 127, 63, | |
146 | /* 98 */ 0, 76, 0, | |
147 | /* 99 */ 38, 76, 38, | |
148 | /* 100 */ 0, 255, 63, | |
149 | /* 101 */ 127, 255, 159, | |
150 | /* 102 */ 0, 204, 51, | |
151 | /* 103 */ 102, 204, 127, | |
152 | /* 104 */ 0, 153, 38, | |
153 | /* 105 */ 76, 153, 95, | |
154 | /* 106 */ 0, 127, 31, | |
155 | /* 107 */ 63, 127, 79, | |
156 | /* 108 */ 0, 76, 19, | |
157 | /* 109 */ 38, 76, 47, | |
158 | /* 110 */ 0, 255, 127, | |
159 | /* 111 */ 127, 255, 191, | |
160 | /* 112 */ 0, 204, 102, | |
161 | /* 113 */ 102, 204, 153, | |
162 | /* 114 */ 0, 153, 76, | |
163 | /* 115 */ 76, 153, 114, | |
164 | /* 116 */ 0, 127, 63, | |
165 | /* 117 */ 63, 127, 95, | |
166 | /* 118 */ 0, 76, 38, | |
167 | /* 119 */ 38, 76, 57, | |
168 | /* 120 */ 0, 255, 191, | |
169 | /* 121 */ 127, 255, 223, | |
170 | /* 122 */ 0, 204, 153, | |
171 | /* 123 */ 102, 204, 178, | |
172 | /* 124 */ 0, 153, 114, | |
173 | /* 125 */ 76, 153, 133, | |
174 | /* 126 */ 0, 127, 95, | |
175 | /* 127 */ 63, 127, 111, | |
176 | /* 128 */ 0, 76, 57, | |
177 | /* 129 */ 38, 76, 66, | |
178 | /* 130 */ 0, 255, 255, | |
179 | /* 131 */ 127, 255, 255, | |
180 | /* 132 */ 0, 204, 204, | |
181 | /* 133 */ 102, 204, 204, | |
182 | /* 134 */ 0, 153, 153, | |
183 | /* 135 */ 76, 153, 153, | |
184 | /* 136 */ 0, 127, 127, | |
185 | /* 137 */ 63, 127, 127, | |
186 | /* 138 */ 0, 76, 76, | |
187 | /* 139 */ 38, 76, 76, | |
188 | /* 140 */ 0, 191, 255, | |
189 | /* 141 */ 127, 223, 255, | |
190 | /* 142 */ 0, 153, 204, | |
191 | /* 143 */ 102, 178, 204, | |
192 | /* 144 */ 0, 114, 153, | |
193 | /* 145 */ 76, 133, 153, | |
194 | /* 146 */ 0, 95, 127, | |
195 | /* 147 */ 63, 111, 127, | |
196 | /* 148 */ 0, 57, 76, | |
197 | /* 149 */ 38, 66, 76, | |
198 | /* 150 */ 0, 127, 255, | |
199 | /* 151 */ 127, 191, 255, | |
200 | /* 152 */ 0, 102, 204, | |
201 | /* 153 */ 102, 153, 204, | |
202 | /* 154 */ 0, 76, 153, | |
203 | /* 155 */ 76, 114, 153, | |
204 | /* 156 */ 0, 63, 127, | |
205 | /* 157 */ 63, 95, 127, | |
206 | /* 158 */ 0, 38, 76, | |
207 | /* 159 */ 38, 57, 76, | |
208 | /* 160 */ 0, 63, 255, | |
209 | /* 161 */ 127, 159, 255, | |
210 | /* 162 */ 0, 51, 204, | |
211 | /* 163 */ 102, 127, 204, | |
212 | /* 164 */ 0, 38, 153, | |
213 | /* 165 */ 76, 95, 153, | |
214 | /* 166 */ 0, 31, 127, | |
215 | /* 167 */ 63, 79, 127, | |
216 | /* 168 */ 0, 19, 76, | |
217 | /* 169 */ 38, 47, 76, | |
218 | /* 170 */ 0, 0, 255, | |
219 | /* 171 */ 127, 127, 255, | |
220 | /* 172 */ 0, 0, 204, | |
221 | /* 173 */ 102, 102, 204, | |
222 | /* 174 */ 0, 0, 153, | |
223 | /* 175 */ 76, 76, 153, | |
224 | /* 176 */ 0, 0, 127, | |
225 | /* 177 */ 63, 63, 127, | |
226 | /* 178 */ 0, 0, 76, | |
227 | /* 179 */ 38, 38, 76, | |
228 | /* 180 */ 63, 0, 255, | |
229 | /* 181 */ 159, 127, 255, | |
230 | /* 182 */ 51, 0, 204, | |
231 | /* 183 */ 127, 102, 204, | |
232 | /* 184 */ 38, 0, 153, | |
233 | /* 185 */ 95, 76, 153, | |
234 | /* 186 */ 31, 0, 127, | |
235 | /* 187 */ 79, 63, 127, | |
236 | /* 188 */ 19, 0, 76, | |
237 | /* 189 */ 47, 38, 76, | |
238 | /* 190 */ 127, 0, 255, | |
239 | /* 191 */ 191, 127, 255, | |
240 | /* 192 */ 102, 0, 204, | |
241 | /* 193 */ 153, 102, 204, | |
242 | /* 194 */ 76, 0, 153, | |
243 | /* 195 */ 114, 76, 153, | |
244 | /* 196 */ 63, 0, 127, | |
245 | /* 197 */ 95, 63, 127, | |
246 | /* 198 */ 38, 0, 76, | |
247 | /* 199 */ 57, 38, 76, | |
248 | /* 200 */ 191, 0, 255, | |
249 | /* 201 */ 223, 127, 255, | |
250 | /* 202 */ 153, 0, 204, | |
251 | /* 203 */ 178, 102, 204, | |
252 | /* 204 */ 114, 0, 153, | |
253 | /* 205 */ 133, 76, 153, | |
254 | /* 206 */ 95, 0, 127, | |
255 | /* 207 */ 111, 63, 127, | |
256 | /* 208 */ 57, 0, 76, | |
257 | /* 209 */ 66, 38, 76, | |
258 | /* 210 */ 255, 0, 255, | |
259 | /* 211 */ 255, 127, 255, | |
260 | /* 212 */ 204, 0, 204, | |
261 | /* 213 */ 204, 102, 204, | |
262 | /* 214 */ 153, 0, 153, | |
263 | /* 215 */ 153, 76, 153, | |
264 | /* 216 */ 127, 0, 127, | |
265 | /* 217 */ 127, 63, 127, | |
266 | /* 218 */ 76, 0, 76, | |
267 | /* 219 */ 76, 38, 76, | |
268 | /* 220 */ 255, 0, 191, | |
269 | /* 221 */ 255, 127, 223, | |
270 | /* 222 */ 204, 0, 153, | |
271 | /* 223 */ 204, 102, 178, | |
272 | /* 224 */ 153, 0, 114, | |
273 | /* 225 */ 153, 76, 133, | |
274 | /* 226 */ 127, 0, 95, | |
275 | /* 227 */ 127, 63, 111, | |
276 | /* 228 */ 76, 0, 57, | |
277 | /* 229 */ 76, 38, 66, | |
278 | /* 230 */ 255, 0, 127, | |
279 | /* 231 */ 255, 127, 191, | |
280 | /* 232 */ 204, 0, 102, | |
281 | /* 233 */ 204, 102, 153, | |
282 | /* 234 */ 153, 0, 76, | |
283 | /* 235 */ 153, 76, 114, | |
284 | /* 236 */ 127, 0, 63, | |
285 | /* 237 */ 127, 63, 95, | |
286 | /* 238 */ 76, 0, 38, | |
287 | /* 239 */ 76, 38, 57, | |
288 | /* 240 */ 255, 0, 63, | |
289 | /* 241 */ 255, 127, 159, | |
290 | /* 242 */ 204, 0, 51, | |
291 | /* 243 */ 204, 102, 127, | |
292 | /* 244 */ 153, 0, 38, | |
293 | /* 245 */ 153, 76, 95, | |
294 | /* 246 */ 127, 0, 31, | |
295 | /* 247 */ 127, 63, 79, | |
296 | /* 248 */ 76, 0, 19, | |
297 | /* 249 */ 76, 38, 47, | |
298 | /* 250 */ 51, 51, 51, | |
299 | /* 251 */ 91, 91, 91, | |
300 | /* 252 */ 132, 132, 132, | |
301 | /* 253 */ 173, 173, 173, | |
302 | /* 254 */ 214, 214, 214, | |
303 | /* 255 */ 255, 255, 255, | |
304 | }; | |
305 | ||
306 | inline DXFVector Cross(const DXFVector& v1, const DXFVector& v2) | |
307 | { | |
308 | return DXFVector(v1.y*v2.z - v1.z*v2.y, v1.z*v2.x - v1.x*v2.z, v1.x*v2.y - v1.y*v2.x); | |
309 | } | |
310 | ||
311 | void DXFFace::CalculateNormal() | |
312 | { | |
313 | DXFVector v01, v02; | |
314 | v01.x = v0.x - v1.x; | |
315 | v01.y = v0.y - v1.y; | |
316 | v01.z = v0.z - v1.z; | |
317 | v02.x = v0.x - v2.x; | |
318 | v02.y = v0.y - v2.y; | |
319 | v02.z = v0.z - v2.z; | |
320 | n = Cross(v01, v02); | |
321 | float mod = sqrt(n.x*n.x + n.y*n.y + n.z*n.z); | |
322 | n.x /= mod; | |
323 | n.y /= mod; | |
324 | n.z /= mod; | |
325 | } | |
326 | ||
327 | // convert an AutoCAD ACI colour to wxWidgets RGB colour | |
328 | inline wxColour ACIColourToRGB(int col) | |
329 | { | |
330 | wxASSERT(col >= 0 && col <= 255); | |
331 | return wxColour(aci_to_rgb[col].r, aci_to_rgb[col].g, aci_to_rgb[col].b); | |
332 | } | |
333 | ||
334 | // DXFReader constructor | |
335 | DXFRenderer::DXFRenderer() | |
336 | { | |
337 | m_loaded = false; | |
338 | } | |
339 | ||
340 | // DXFReader destructor | |
341 | DXFRenderer::~DXFRenderer() | |
342 | { | |
343 | Clear(); | |
344 | } | |
345 | ||
346 | // deallocate all the dynamic data | |
347 | void DXFRenderer::Clear() | |
348 | { | |
349 | m_loaded = false; | |
350 | { | |
351 | for (DXFLayerList::Node *node = m_layers.GetFirst(); node; node = node->GetNext()) | |
352 | { | |
353 | DXFLayer *current = node->GetData(); | |
354 | delete current; | |
355 | } | |
356 | } | |
357 | m_layers.Clear(); | |
358 | { | |
359 | for (DXFEntityList::Node *node = m_entities.GetFirst(); node; node = node->GetNext()) | |
360 | { | |
361 | DXFEntity *current = node->GetData(); | |
362 | delete current; | |
363 | } | |
364 | m_entities.Clear(); | |
365 | } | |
366 | } | |
367 | ||
368 | int DXFRenderer::GetLayerColour(const wxString& layer) const | |
369 | { | |
370 | for (DXFLayerList::Node *node = m_layers.GetFirst(); node; node = node->GetNext()) | |
371 | { | |
372 | DXFLayer *current = node->GetData(); | |
373 | if (current->name == layer) | |
374 | return current->colour; | |
375 | } | |
376 | return 7; // white | |
377 | } | |
378 | ||
379 | // read two sequential lines | |
380 | inline void GetLines(wxTextInputStream& text, wxString& line1, wxString& line2) | |
381 | { | |
382 | line1 = text.ReadLine().Trim().Trim(false); | |
383 | line2 = text.ReadLine().Trim().Trim(false); | |
384 | } | |
385 | ||
386 | // parse header section: just skip everything | |
387 | bool DXFRenderer::ParseHeader(wxInputStream& stream) | |
388 | { | |
389 | wxTextInputStream text(stream); | |
390 | wxString line1, line2; | |
391 | while (stream.CanRead()) | |
392 | { | |
393 | GetLines(text, line1, line2); | |
394 | if (line1 == wxT("0") && line2 == wxT("ENDSEC")) | |
395 | return true; | |
396 | } | |
397 | return false; | |
398 | } | |
399 | ||
400 | // parse tables section: save layers name and colour | |
401 | bool DXFRenderer::ParseTables(wxInputStream& stream) | |
402 | { | |
403 | wxTextInputStream text(stream); | |
404 | wxString line1, line2; | |
405 | bool inlayer=false; | |
406 | DXFLayer layer; | |
407 | while (stream.CanRead()) | |
408 | { | |
409 | GetLines(text, line1, line2); | |
410 | if (line1 == wxT("0") && inlayer) | |
411 | { | |
412 | // flush layer | |
413 | if (!layer.name.IsEmpty() && layer.colour != -1) | |
414 | { | |
415 | DXFLayer *p = new DXFLayer; | |
416 | p->name = layer.name; | |
417 | p->colour = layer.colour; | |
418 | m_layers.Append(p); | |
419 | } | |
420 | layer = DXFLayer(); | |
421 | inlayer = false; | |
422 | } | |
423 | if (line1 == wxT("0") && line2 == wxT("ENDSEC")) | |
424 | return true; | |
425 | else if (line1 == wxT("0") && line2 == wxT("LAYER")) | |
426 | inlayer = true; | |
427 | else if (inlayer) | |
428 | { | |
429 | if (line1 == wxT("2")) // layer name | |
430 | layer.name = line2; | |
431 | else if (line1 == wxT("62")) // ACI colour | |
432 | { | |
433 | long l; | |
434 | line2.ToLong(&l); | |
435 | layer.colour = l; | |
436 | } | |
437 | } | |
438 | } | |
439 | return false; | |
440 | } | |
441 | ||
442 | // parse entities section: save 3DFACE and LINE entities | |
443 | bool DXFRenderer::ParseEntities(wxInputStream& stream) | |
444 | { | |
445 | wxTextInputStream text(stream); | |
446 | wxString line1, line2; | |
447 | int state = 0; // 0: none, 1: 3DFACE, 2: LINE | |
448 | DXFVector v[4]; | |
449 | int colour = -1; | |
450 | wxString layer; | |
451 | while (stream.CanRead()) | |
452 | { | |
453 | GetLines(text, line1, line2); | |
454 | if (line1 == wxT("0") && state > 0) | |
455 | { | |
456 | // flush entity | |
457 | if (state == 1) // 3DFACE | |
458 | { | |
459 | DXFFace *p = new DXFFace; | |
460 | p->v0 = v[0]; | |
461 | p->v1 = v[1]; | |
462 | p->v2 = v[2]; | |
463 | p->v3 = v[3]; | |
464 | p->CalculateNormal(); | |
465 | if (colour != -1) | |
466 | p->colour = colour; | |
467 | else | |
468 | p->colour = GetLayerColour(layer); | |
469 | m_entities.Append(p); | |
470 | colour = -1; layer = wxEmptyString; | |
471 | v[0] = v[1] = v[2] = v[3] = DXFVector(); | |
472 | state = 0; | |
473 | } | |
474 | else if (state == 2) // LINE | |
475 | { | |
476 | DXFLine *p = new DXFLine; | |
477 | p->v0 = v[0]; | |
478 | p->v1 = v[1]; | |
479 | if (colour != -1) | |
480 | p->colour = colour; | |
481 | else | |
482 | p->colour = GetLayerColour(layer); | |
483 | m_entities.Append(p); | |
484 | colour = -1; layer = wxEmptyString; | |
485 | v[0] = v[1] = v[2] = v[3] = DXFVector(); | |
486 | state = 0; | |
487 | } | |
488 | } | |
489 | if (line1 == wxT("0") && line2 == wxT("ENDSEC")) | |
490 | return true; | |
491 | else if (line1 == wxT("0") && line2 == wxT("3DFACE")) | |
492 | state = 1; | |
493 | else if (line1 == wxT("0") && line2 == wxT("LINE")) | |
494 | state = 2; | |
495 | else if (state > 0) | |
496 | { | |
497 | double d; | |
498 | line2.ToDouble(&d); | |
499 | if (line1 == wxT("10")) | |
500 | v[0].x = d; | |
501 | else if (line1 == wxT("20")) | |
502 | v[0].y = d; | |
503 | else if (line1 == wxT("30")) | |
504 | v[0].z = d; | |
505 | else if (line1 == wxT("11")) | |
506 | v[1].x = d; | |
507 | else if (line1 == wxT("21")) | |
508 | v[1].y = d; | |
509 | else if (line1 == wxT("31")) | |
510 | v[1].z = d; | |
511 | else if (line1 == wxT("12")) | |
512 | v[2].x = d; | |
513 | else if (line1 == wxT("22")) | |
514 | v[2].y = d; | |
515 | else if (line1 == wxT("32")) | |
516 | v[2].z = d; | |
517 | else if (line1 == wxT("13")) | |
518 | v[3].x = d; | |
519 | else if (line1 == wxT("23")) | |
520 | v[3].y = d; | |
521 | else if (line1 == wxT("33")) | |
522 | v[3].z = d; | |
523 | else if (line1 == wxT("8")) // layer | |
524 | layer = line2; | |
525 | else if (line1 == wxT("62")) // colour | |
526 | { | |
527 | long l; | |
528 | line2.ToLong(&l); | |
529 | colour = l; | |
530 | } | |
531 | } | |
532 | } | |
533 | return false; | |
534 | } | |
535 | ||
536 | // parse and load a DXF file | |
537 | // currently pretty limited, but knows enought do handle 3DFACEs and LINEs | |
538 | bool DXFRenderer::Load(wxInputStream& stream) | |
539 | { | |
540 | Clear(); | |
541 | wxTextInputStream text(stream); | |
542 | ||
543 | wxString line1, line2; | |
544 | while (stream.CanRead()) | |
545 | { | |
546 | GetLines(text, line1, line2); | |
547 | if (line1 == wxT("999")) // comment | |
548 | continue; | |
549 | else if (line1 == wxT("0") && line2 == wxT("SECTION")) | |
550 | { | |
551 | GetLines(text, line1, line2); | |
552 | if (line1 == wxT("2")) | |
553 | { | |
554 | if (line2 == wxT("HEADER")) | |
555 | { | |
556 | if (!ParseHeader(stream)) | |
557 | return false; | |
558 | } | |
559 | else if (line2 == wxT("TABLES")) | |
560 | { | |
561 | if (!ParseTables(stream)) | |
562 | return false; | |
563 | } | |
564 | else if (line2 == wxT("ENTITIES")) | |
565 | { | |
566 | if (!ParseEntities(stream)) | |
567 | return false; | |
568 | } | |
569 | } | |
570 | } | |
571 | } | |
572 | ||
573 | NormalizeEntities(); | |
574 | m_loaded = true; | |
575 | return true; | |
576 | } | |
577 | ||
578 | inline float mymin(float x, float y) { return x < y ? x : y; } | |
579 | inline float mymax(float x, float y) { return x > y ? x : y; } | |
580 | ||
581 | // Scale object boundings to [-5,5] | |
582 | void DXFRenderer::NormalizeEntities() | |
583 | { | |
584 | // calculate current min and max boundings of object | |
585 | DXFVector minv(10e20f, 10e20f, 10e20f); | |
586 | DXFVector maxv(-10e20f, -10e20f, -10e20f); | |
587 | for (DXFEntityList::Node *node = m_entities.GetFirst(); node; node = node->GetNext()) | |
588 | { | |
589 | DXFEntity *p = node->GetData(); | |
590 | if (p->type == DXFEntity::Line) | |
591 | { | |
592 | DXFLine *line = (DXFLine *)p; | |
593 | const DXFVector *v[2] = { &line->v0, &line->v1 }; | |
594 | for (int i = 0; i < 2; ++i) | |
595 | { | |
596 | minv.x = mymin(v[i]->x, minv.x); | |
597 | minv.y = mymin(v[i]->y, minv.y); | |
598 | minv.z = mymin(v[i]->z, minv.z); | |
599 | maxv.x = mymax(v[i]->x, maxv.x); | |
600 | maxv.y = mymax(v[i]->y, maxv.y); | |
601 | maxv.z = mymax(v[i]->z, maxv.z); | |
602 | } | |
603 | } else if (p->type == DXFEntity::Face) | |
604 | { | |
605 | DXFFace *face = (DXFFace *)p; | |
606 | const DXFVector *v[4] = { &face->v0, &face->v1, &face->v2, &face->v3 }; | |
607 | for (int i = 0; i < 4; ++i) | |
608 | { | |
609 | minv.x = mymin(v[i]->x, minv.x); | |
610 | minv.y = mymin(v[i]->y, minv.y); | |
611 | minv.z = mymin(v[i]->z, minv.z); | |
612 | maxv.x = mymax(v[i]->x, maxv.x); | |
613 | maxv.y = mymax(v[i]->y, maxv.y); | |
614 | maxv.z = mymax(v[i]->z, maxv.z); | |
615 | } | |
616 | } | |
617 | } | |
618 | ||
619 | // rescale object down to [-5,5] | |
620 | DXFVector span(maxv.x - minv.x, maxv.y - minv.y, maxv.z - minv.z); | |
621 | float factor = mymin(mymin(10.0f / span.x, 10.0f / span.y), 10.0f / span.z); | |
622 | for (DXFEntityList::Node *node2 = m_entities.GetFirst(); node2; node2 = node2->GetNext()) | |
623 | { | |
624 | DXFEntity *p = node2->GetData(); | |
625 | if (p->type == DXFEntity::Line) | |
626 | { | |
627 | DXFLine *line = (DXFLine *)p; | |
628 | DXFVector *v[2] = { &line->v0, &line->v1 }; | |
629 | for (int i = 0; i < 2; ++i) | |
630 | { | |
631 | v[i]->x -= minv.x + span.x/2; v[i]->x *= factor; | |
632 | v[i]->y -= minv.y + span.y/2; v[i]->y *= factor; | |
633 | v[i]->z -= minv.z + span.z/2; v[i]->z *= factor; | |
634 | } | |
635 | } else if (p->type == DXFEntity::Face) | |
636 | { | |
637 | DXFFace *face = (DXFFace *)p; | |
638 | DXFVector *v[4] = { &face->v0, &face->v1, &face->v2, &face->v3 }; | |
639 | for (int i = 0; i < 4; ++i) | |
640 | { | |
641 | v[i]->x -= minv.x + span.x/2; v[i]->x *= factor; | |
642 | v[i]->y -= minv.y + span.y/2; v[i]->y *= factor; | |
643 | v[i]->z -= minv.z + span.z/2; v[i]->z *= factor; | |
644 | } | |
645 | } | |
646 | } | |
647 | } | |
648 | ||
649 | // OpenGL renderer for DXF entities | |
650 | void DXFRenderer::Render() const | |
651 | { | |
652 | if (!m_loaded) | |
653 | return; | |
654 | ||
655 | for (DXFEntityList::Node *node = m_entities.GetFirst(); node; node = node->GetNext()) | |
656 | { | |
657 | DXFEntity *p = node->GetData(); | |
658 | wxColour c = ACIColourToRGB(p->colour); | |
659 | if (p->type == DXFEntity::Line) | |
660 | { | |
661 | DXFLine *line = (DXFLine *)p; | |
662 | glBegin(GL_LINES); | |
663 | glColor3f(c.Red()/255.0,c.Green()/255.0,c.Blue()/255.0); | |
664 | glVertex3f(line->v0.x, line->v0.y, line->v0.z); | |
665 | glVertex3f(line->v1.x, line->v1.y, line->v1.z); | |
666 | glEnd(); | |
667 | } | |
668 | else if (p->type == DXFEntity::Face) | |
669 | { | |
670 | DXFFace *face = (DXFFace *)p; | |
671 | glBegin(GL_TRIANGLES); | |
672 | glColor3f(c.Red()/255.0,c.Green()/255.0,c.Blue()/255.0); | |
673 | glNormal3f(face->n.x, face->n.y, face->n.z); | |
674 | glVertex3f(face->v0.x, face->v0.y, face->v0.z); | |
675 | glVertex3f(face->v1.x, face->v1.y, face->v1.z); | |
676 | glVertex3f(face->v2.x, face->v2.y, face->v2.z); | |
677 | glEnd(); | |
678 | } | |
679 | } | |
680 | } |