aboutsummaryrefslogtreecommitdiff
path: root/docs/doxygen/nel/polygon_8cpp-source.html
blob: d6fb8b63cf82597c0e394a8d9c4620a9ab1a6029 (plain)
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
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
<!doctype html public "-//W3C//DTD HTML 4.0 Transitional//EN" "http://www.w3.org/TR/REC-html40/loose.dtd">
<HTML>
<HEAD>
	<TITLE>nevrax.org : docs</TITLE>
	<LINK REL=stylesheet TYPE="text/css" HREF="http://www.nevrax.org/inc/css/nevrax.css">
	<link href="doxygen.css" rel="stylesheet" type="text/css">
</HEAD>
<BODY MARGINHEIGHT="0" MARGINWIDTH="0">

<!-- uplinks -->
<TABLE CELLSPACING=0 CELLPADDING=0  BORDER=0>
 <TR>
        <TD WIDTH=16><IMG  SRC="http://www.nevrax.org/inc/img/pixel.gif" WIDTH="16" HEIGHT="16" BORDER=0 ALT=""></TD>
        <TD WIDTH=140 BGCOLOR=#dddddd><IMG  SRC="http://www.nevrax.org/inc/img/pixel.gif" WIDTH="140" HEIGHT="16" BORDER=0 ALT=""></TD>
        <TD WIDTH=16><IMG  SRC="http://www.nevrax.org/inc/img/pixel.gif" WIDTH="16" HEIGHT="16" BORDER=0 ALT=""></TD>
        <TD><IMG width=6 height=14 SRC="http://www.nevrax.org/inc/img/reddots.gif" ALT="#" VSPACE=2 HSPACE=2 BORDER=0 ></TD><TD VALIGN=middle>&nbsp;<A CLASS=uplinks HREF=http://www.nevrax.org><b>Home</B></FONT></A>&nbsp;&nbsp;&nbsp;</TD>
        <TD><IMG  width=6 height=14  SRC="http://www.nevrax.org/inc/img/reddots.gif" ALT="#" VSPACE=2 HSPACE=2 BORDER=0 ></TD><TD VALIGN=middle>&nbsp;<A CLASS=uplinks HREF=http://www.nevrax.com><b>nevrax.com</B></FONT></A>&nbsp;&nbsp;&nbsp;</TD>
 </TR>
</TABLE> 

<!-- banner Nevrax -->
<TABLE CELLSPACING=0 CELLPADDING=0  BORDER=0 WIDTH=100%>
 <TR><TD  BGCOLOR="#000000" BACKGROUND="http://www.nevrax.org/inc/img/black_banner.jpg"><A HREF="http://www.nevrax.org"><IMG  SRC="http://www.nevrax.org/inc/img/nevrax.gif" WIDTH="170" HEIGHT="45" BORDER=0 ALT="Nevrax" ></A></TD></TR>
</TABLE>

<!-- main table -->
<TABLE CELLSPACING=0 CELLPADDING=0  BORDER=0 height=100%>
 <TR>
	<TD WIDTH=16><IMG  SRC="http://www.nevrax.org/inc/img/pixel.gif" WIDTH="16" HEIGHT="10" BORDER=0 ALT=""></TD>
	<TD WIDTH=140   BGCOLOR=#dddddd VALIGN=TOP ALIGN=middle><IMG  SRC="http://www.nevrax.org/inc/img/pixel.gif" WIDTH="140" HEIGHT="10" BORDER=0 ALT="">

		<!------ Begin Box ------>
		<TABLE BORDER=0 CELLSPACING=0 CELLPADDING=0 BGCOLOR=black><TR><TD><TABLE border=0  cellspacing=2 cellpadding=0 width=120><tr><TD ALIGN=middle bgcolor=black>
		<FONT COLOR=white FACE="sans-serif"><B>Nevrax.org</B></FONT></TD></TR><tr><td  colspan=2 bgcolor=#FFFFFF>
		<TABLE cellspacing=0 cellpadding=1 border=0>
			<tr><td ALIGN=middle><a  class='linkbox' href="http://www.nevrax.org/news/" TITLE="Rubrique news"><img width=13 height=15  hspace=5 border=0 src=http://www.nevrax.org/inc/img/picto-news.gif ALT=#></A></td><td><a  class='linkbox' href="http://www.nevrax.org/news/" TITLE="News">News</a></td></tr>
			<tr><td ALIGN=middle><a  class='linkbox' href="http://www.nevrax.org/mail/" TITLE="Rubrique mail"><img width=15 height=11  hspace=5 border=0 src=http://www.nevrax.org/inc/img/picto-mail.gif ALT=#></A></td><td><a  class='linkbox' href="http://www.nevrax.org/mail/" TITLE="Mailing list archive">Mailing-list</a></td></tr>
			<tr><td ALIGN=middle><a  class='linkbox' href="http://www.nevrax.org/docs/" TITLE="Rubrique docs"><img width=14 height=16  hspace=5 border=0 src=http://www.nevrax.org/inc/img/picto-docs.gif ALT=#></A></td><td><a  class='linkbox' href="http://www.nevrax.org/docs/" TITLE="Documentation">Documentation</a></td></tr>
			<tr><td ALIGN=middle><a  class='linkbox' href="http://www.nevrax.org/cvs/" TITLE="Rubrique cvs"><img width=13 height=17  hspace=5 border=0 src=http://www.nevrax.org/inc/img/picto-cvs.gif ALT=#></A></td><td><a  class='linkbox' href="http://www.nevrax.org/cvs/" TITLE="CVS Web">CVS</a></td></tr>
			<tr><td ALIGN=middle><a  class='linkbox' href="http://www.nevrax.org/bugs/" TITLE="Rubrique bugs"><img width=20 height=16  hspace=5 border=0 src=http://www.nevrax.org/inc/img/picto-bugs.gif ALT=#></A></td><td><a  class='linkbox' href="http://www.nevrax.org/bugs/" TITLE="Bugtracking">Bugs</a></td></tr>
			<tr><td ALIGN=middle><a  class='linkbox' href="http://www.nevrax.org/GPL.php3" TITLE="Rubrique license"><img  width=18 height=12   hspace=5 border=0 src=http://www.nevrax.org/inc/img/picto-gpl.gif ALT=#></A></td><td><a  class='linkbox' href="http://www.nevrax.org/GPL.php3" TITLE="License">License</a></td></tr>
		</TABLE>
		</TD></TR></TABLE></TD></TR></TABLE>
		<!------ End Box  ------>

	</TD>
	<TD WIDTH=15><IMG  SRC="http://www.nevrax.org/inc/img/pixel.gif" WIDTH="16" HEIGHT="16" BORDER=0 ALT=""></TD>
	<TD ALIGN=left valign=top><IMG  SRC="http://www.nevrax.org/inc/img/pixel.gif" WIDTH="140" HEIGHT="10" BORDER=0 ALT="">

<!-- title -->
<TABLE  background="http://www.nevrax.org/inc/img/redline.gif" CELLSPACING=0 CELLPADDING=0  BORDER=0 width=100%><tr><td>
<A HREF="http://www.nevrax.org/docs/"><img src="http://www.nevrax.org/inc/img/t_docs.gif" ALT="Docs" HEIGHT=20 BORDER=0></A>
</td><td><IMG  SRC="http://www.nevrax.org/inc/img/pixel.gif" WIDTH="1" HEIGHT="1" BORDER=0 ALT="">
</td></tr></table>
&nbsp;

<!-- block -->
<TABLE  bgcolor="#dddddd" CELLSPACING=0 CELLPADDING=0  BORDER=0 width=100%><tr><td width=1% valign=middle><img width=6 height=14 hspace=2 vspace=2 src="http://www.nevrax.org/inc/img/reddots.gif"></TD>
	<TD><B>Documentation</B></TD>
	<TD ALIGN=RIGHT>&nbsp;</td>
</tr></table>
<!-- Generated by Doxygen 1.2.14 -->
<center>
<a class="qindex" href="index.html">Main Page</a> &nbsp; <a class="qindex" href="namespaces.html">Namespace List</a> &nbsp; <a class="qindex" href="hierarchy.html">Class Hierarchy</a> &nbsp; <a class="qindex" href="classes.html">Alphabetical List</a> &nbsp; <a class="qindex" href="annotated.html">Compound List</a> &nbsp; <a class="qindex" href="files.html">File List</a> &nbsp; <a class="qindex" href="namespacemembers.html">Namespace Members</a> &nbsp; <a class="qindex" href="functions.html">Compound Members</a> &nbsp; <a class="qindex" href="globals.html">File Members</a> &nbsp; <a class="qindex" href="pages.html">Related Pages</a> &nbsp; <a class="qindexRef" doxygen="_cgi:http://www.nevrax.org/cgi-bin/nel-search.cgi" href="http://www.nevrax.org/cgi-bin/nel-search.cgi">Search</a> &nbsp; </center>
<hr><h1>polygon.cpp</h1><a href="polygon_8cpp.html">Go to the documentation of this file.</a><div class="fragment"><pre>00001 
00007 <font class="comment">/* Copyright, 2000 Nevrax Ltd.</font>
00008 <font class="comment"> *</font>
00009 <font class="comment"> * This file is part of NEVRAX NEL.</font>
00010 <font class="comment"> * NEVRAX NEL is free software; you can redistribute it and/or modify</font>
00011 <font class="comment"> * it under the terms of the GNU General Public License as published by</font>
00012 <font class="comment"> * the Free Software Foundation; either version 2, or (at your option)</font>
00013 <font class="comment"> * any later version.</font>
00014 <font class="comment"></font>
00015 <font class="comment"> * NEVRAX NEL is distributed in the hope that it will be useful, but</font>
00016 <font class="comment"> * WITHOUT ANY WARRANTY; without even the implied warranty of</font>
00017 <font class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU</font>
00018 <font class="comment"> * General Public License for more details.</font>
00019 <font class="comment"></font>
00020 <font class="comment"> * You should have received a copy of the GNU General Public License</font>
00021 <font class="comment"> * along with NEVRAX NEL; see the file COPYING. If not, write to the</font>
00022 <font class="comment"> * Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,</font>
00023 <font class="comment"> * MA 02111-1307, USA.</font>
00024 <font class="comment"> */</font>
00025 
00026 <font class="preprocessor">#include "<a class="code" href="stdmisc_8h.html">stdmisc.h</a>"</font>
00027 
00028 <font class="preprocessor">#include "<a class="code" href="polygon_8h.html">nel/misc/polygon.h</a>"</font>
00029 <font class="preprocessor">#include "<a class="code" href="plane_8h.html">nel/misc/plane.h</a>"</font>
00030 <font class="preprocessor">#include "<a class="code" href="triangle_8h.html">nel/misc/triangle.h</a>"</font>
00031 
00032 
00033 <font class="keyword">using</font> <font class="keyword">namespace </font>std;
00034 <font class="keyword">using</font> <font class="keyword">namespace </font>NLMISC;
00035 
00036 
00037 <font class="keyword">namespace </font>NLMISC 
00038 {
00039 
00040 
00041 <font class="comment">//==================================//</font>
00042 <font class="comment">//              CPolygon implementation     //</font>
00043 <font class="comment">//==================================//</font>
00044 
00045 <font class="comment">// ***************************************************************************</font>
<a name="l00046"></a><a class="code" href="classNLMISC_1_1CPolygon.html#a1">00046</a> CPolygon::CPolygon(<font class="keyword">const</font> CVector &amp;a, <font class="keyword">const</font> CVector &amp;b, <font class="keyword">const</font> CVector &amp;c)
00047 {
00048         <a class="code" href="classNLMISC_1_1CPolygon.html#m0">Vertices</a>.reserve(3);
00049         <a class="code" href="classNLMISC_1_1CPolygon.html#m0">Vertices</a>.push_back(a);
00050         <a class="code" href="classNLMISC_1_1CPolygon.html#m0">Vertices</a>.push_back(b);
00051         <a class="code" href="classNLMISC_1_1CPolygon.html#m0">Vertices</a>.push_back(c);
00052 }
00053 
00054 
00055 <font class="comment">// ***************************************************************************</font>
<a name="l00056"></a><a class="code" href="classNLMISC_1_1CPolygon.html#a3">00056</a> <font class="keywordtype">void</font>                    CPolygon::clip(<font class="keyword">const</font> CPlane      *planes, uint nPlanes)
00057 {
00058         <font class="keywordflow">if</font>(nPlanes==0 || <a class="code" href="classNLMISC_1_1CPolygon.html#a2">getNumVertices</a>()==0)
00059                 <font class="keywordflow">return</font>;
00060 
00061         <font class="comment">// The final polygon has at maximum currentVertices+number of clipping planes.</font>
00062         <font class="comment">// For performance, the vectors are static, so reallocation rarely occurs.</font>
00063         <font class="keyword">static</font>  vector&lt;CVector&gt;         tab0, tab1;
00064         tab0.resize(<a class="code" href="classNLMISC_1_1CPolygon.html#a2">getNumVertices</a>()+nPlanes);
00065         tab1.resize(<a class="code" href="classNLMISC_1_1CPolygon.html#a2">getNumVertices</a>()+nPlanes);
00066         <font class="comment">// Init tab0 with Vertices.</font>
00067         copy(<a class="code" href="classNLMISC_1_1CPolygon.html#m0">Vertices</a>.begin(), <a class="code" href="classNLMISC_1_1CPolygon.html#m0">Vertices</a>.end(), tab0.begin());
00068         CVector                         *<a class="code" href="driver__opengl__extension__def_8h.html#a404">in</a>=&amp;(*tab0.begin()), *out= &amp;(*tab1.begin());
00069         sint                            nin= <a class="code" href="classNLMISC_1_1CPolygon.html#a2">getNumVertices</a>(), nout;
00070         <font class="keywordflow">for</font>(sint i=0;i&lt;(sint)nPlanes;i++)
00071         {
00072                 nout= planes[i].clipPolygonBack(<a class="code" href="driver__opengl__extension__def_8h.html#a404">in</a>, out, nin);
00073                 swap(<a class="code" href="driver__opengl__extension__def_8h.html#a404">in</a>, out);
00074                 nin= nout;
00075                 <font class="keywordflow">if</font>(nin==0)
00076                         <font class="keywordflow">break</font>;
00077         }
00078 
00079         <font class="comment">// Final result in "in".</font>
00080         <a class="code" href="classNLMISC_1_1CPolygon.html#m0">Vertices</a>.resize(nin);
00081         <font class="keywordflow">if</font>(nin&gt;0)
00082         {
00083                 memcpy(&amp;(*<a class="code" href="classNLMISC_1_1CPolygon.html#m0">Vertices</a>.begin()), <a class="code" href="driver__opengl__extension__def_8h.html#a404">in</a>, nin*<font class="keyword">sizeof</font>(CVector));
00084         }
00085 }
00086 
00087 
00088 <font class="comment">// ***************************************************************************</font>
<a name="l00089"></a><a class="code" href="classNLMISC_1_1CPolygon.html#a4">00089</a> <font class="keywordtype">void</font>                    CPolygon::clip(<font class="keyword">const</font> std::vector&lt;CPlane&gt; &amp;planes)
00090 {
00091         <font class="keywordflow">if</font>(planes.size()==0)
00092                 <font class="keywordflow">return</font>;
00093         <a class="code" href="classNLMISC_1_1CPolygon.html#a3">clip</a>(&amp;(*planes.begin()), planes.size());
00094 }
00095 
00096 
00097 
00098 <font class="comment">// ***************************************************************************</font>
<a name="l00099"></a><a class="code" href="classNLMISC_1_1CPolygon.html#a5">00099</a> <font class="keywordtype">void</font> CPolygon::serial(<a class="code" href="classNLMISC_1_1IStream.html">NLMISC::IStream</a> &amp;f) <font class="keywordflow">throw</font>(NLMISC::EStream)
00100 {
00101         f.serialVersion(0);
00102         f.serialCont(Vertices);
00103 }
00104 
00105 <font class="comment">// ***************************************************************************</font>
<a name="l00106"></a><a class="code" href="classNLMISC_1_1CPolygon.html#a8">00106</a> <font class="keywordtype">void</font> CPolygon::getBestTriplet(uint &amp;index0,uint &amp;index1,uint &amp;index2)
00107 {
00108         <a class="code" href="debug_8h.html#a6">nlassert</a>(<a class="code" href="classNLMISC_1_1CPolygon.html#m0">Vertices</a>.size() &gt;= 3);
00109         uint i, j, k;
00110         <font class="keywordtype">float</font> bestArea = 0.f;
00111         <font class="keyword">const</font> uint numVerts = <a class="code" href="classNLMISC_1_1CPolygon.html#m0">Vertices</a>.size();
00112         <font class="keywordflow">for</font> (i = 0; i &lt; numVerts; ++i)
00113         {
00114                 <font class="keywordflow">for</font> (j = 0; j &lt; numVerts; ++j)
00115                 {
00116                         <font class="keywordflow">if</font> (i != j)
00117                         {
00118                                 <font class="keywordflow">for</font> (k = 0; k &lt; numVerts; ++k)
00119                                 {
00120                                         <font class="keywordflow">if</font> (k != i &amp;&amp; k != j)
00121                                         {
00122                                                 CVector v0 = <a class="code" href="classNLMISC_1_1CPolygon.html#m0">Vertices</a>[j] - <a class="code" href="classNLMISC_1_1CPolygon.html#m0">Vertices</a>[i];
00123                                                 CVector v1 = <a class="code" href="classNLMISC_1_1CPolygon.html#m0">Vertices</a>[k] - <a class="code" href="classNLMISC_1_1CPolygon.html#m0">Vertices</a>[i];                                         
00124                                                 <font class="keywordtype">float</font> area = (v0 ^ v1).norm();
00125                                                 <font class="keywordflow">if</font> (area &gt; bestArea)
00126                                                 {
00127                                                         bestArea = area;
00128                                                         index0 = i;
00129                                                         index1 = j;
00130                                                         index2 = k;
00131                                                 }
00132                                         }
00133                                 }
00134                         }
00135                 }
00136         }
00137 
00138 }
00139 
00140 <font class="comment">// ***************************************************************************</font>
<a name="l00141"></a><a class="code" href="classNLMISC_1_1CPolygon.html#a9">00141</a> <font class="keywordtype">void</font> CPolygon::buildBasis(CMatrix &amp;dest)
00142 {
00143         <a class="code" href="debug_8h.html#a6">nlassert</a>(<a class="code" href="classNLMISC_1_1CPolygon.html#m0">Vertices</a>.size() &gt; 3);
00144         uint i1, i2, i3;
00145         <a class="code" href="classNLMISC_1_1CPolygon.html#a8">getBestTriplet</a>(i1, i2, i3);
00146         CVector v1 = (<a class="code" href="classNLMISC_1_1CPolygon.html#m0">Vertices</a>[i2] - <a class="code" href="classNLMISC_1_1CPolygon.html#m0">Vertices</a>[i1]).normed();
00147         CVector v2 = (<a class="code" href="classNLMISC_1_1CPolygon.html#m0">Vertices</a>[i3] - <a class="code" href="classNLMISC_1_1CPolygon.html#m0">Vertices</a>[i1]).normed();
00148         CVector K = v2 ^ v1;
00149         CVector I = v1 - (v1 * K) * v1;
00150         CVector J = K ^ I;
00151         dest.setRot(I, J, K);
00152         dest.setPos(<a class="code" href="classNLMISC_1_1CPolygon.html#m0">Vertices</a>[i1]);
00153 }
00154 
00155 <font class="comment">// ***************************************************************************</font>
00156 
<a name="l00157"></a><a class="code" href="classNLMISC_1_1CConcavePolygonsVertexDesc.html">00157</a> <font class="keyword">class </font>CConcavePolygonsVertexDesc
00158 {
00159 <font class="keyword">public</font>:
00160 
<a name="l00161"></a><a class="code" href="classNLMISC_1_1CConcavePolygonsVertexDesc.html#a0">00161</a>         <a class="code" href="classNLMISC_1_1CConcavePolygonsVertexDesc.html#a0">CConcavePolygonsVertexDesc</a> (<font class="keywordtype">float</font> length, uint <a class="code" href="driver__opengl__extension__def_8h.html#a358">index</a>)
00162         {
00163                 <a class="code" href="classNLMISC_1_1CConcavePolygonsVertexDesc.html#m0">Length</a> = length;
00164                 <a class="code" href="classNLMISC_1_1CConcavePolygonsVertexDesc.html#m1">Index</a> = <a class="code" href="driver__opengl__extension__def_8h.html#a358">index</a>;
00165         }
00166 
00167         <font class="comment">// Length &gt; 0</font>
<a name="l00168"></a><a class="code" href="classNLMISC_1_1CConcavePolygonsVertexDesc.html#m0">00168</a>         <font class="keywordtype">float</font>   <a class="code" href="classNLMISC_1_1CConcavePolygonsVertexDesc.html#m0">Length</a>;
00169 
00170         <font class="comment">// First vertex index</font>
<a name="l00171"></a><a class="code" href="classNLMISC_1_1CConcavePolygonsVertexDesc.html#m1">00171</a>         uint    <a class="code" href="classNLMISC_1_1CConcavePolygonsVertexDesc.html#m1">Index</a>;
00172 };
00173 <font class="keyword">typedef</font> std::map&lt;float, CConcavePolygonsVertexDesc&gt; <a class="code" href="namespaceNLMISC.html#a199">TCConcavePolygonsVertexMap</a>;
00174 
00175 <font class="comment">// ***************************************************************************</font>
00176 
<a name="l00177"></a><a class="code" href="classNLMISC_1_1CPolygon.html#d0">00177</a> <font class="keywordtype">bool</font> CPolygon::toConvexPolygonsEdgeIntersect (<font class="keyword">const</font> CVector2f&amp; a0, <font class="keyword">const</font> CVector2f&amp; a1, <font class="keyword">const</font> CVector2f&amp; b0, <font class="keyword">const</font> CVector2f&amp; b1)
00178 {
00179         <font class="keywordtype">float</font> Aa = (a0.y - a1.y) / (a0.x - a1.x);
00180         <font class="keywordtype">float</font> Ba = a0.y - a0.x * Aa;
00181         <font class="keywordtype">float</font> Ab = (b0.y - b1.y) / (b0.x - b1.x);
00182         <font class="keywordtype">float</font> Bb = b0.y - b0.x * Ab;
00183 
00184         <font class="comment">// Intersection </font>
00185         CVector2f intersection;
00186         intersection.x = (Bb - Ba) / (Aa - Ab);
00187         intersection.y = Aa * intersection.x + Ba;
00188 
00189         <font class="comment">// In it ?</font>
00190         <font class="keywordflow">return</font> ( ( (a0-intersection)*(a1-intersection) &lt; 0 ) &amp;&amp; ( (b0-intersection)*(b1-intersection) &lt; 0 ) );
00191 }
00192 
00193 <font class="comment">// ***************************************************************************</font>
00194 
<a name="l00195"></a><a class="code" href="classNLMISC_1_1CBSPNode2v.html">00195</a> <font class="keyword">class </font>CBSPNode2v
00196 {
00197 <font class="keyword">public</font>:
<a name="l00198"></a><a class="code" href="classNLMISC_1_1CBSPNode2v.html#a0">00198</a>         <a class="code" href="classNLMISC_1_1CBSPNode2v.html#a0">CBSPNode2v</a> () 
00199         {
00200                 <a class="code" href="classNLMISC_1_1CBSPNode2v.html#m0">Back</a> = NULL;
00201                 <a class="code" href="classNLMISC_1_1CBSPNode2v.html#m1">Front</a> = NULL;
00202         }
<a name="l00203"></a><a class="code" href="classNLMISC_1_1CBSPNode2v.html#a1">00203</a>         <a class="code" href="classNLMISC_1_1CBSPNode2v.html#a0">CBSPNode2v</a> ( <font class="keyword">const</font> CPlane &amp;plane, CVector p0, CVector p1, uint v0, uint v1 ) : <a class="code" href="classNLMISC_1_1CBSPNode2v.html#m3">Plane</a> (plane), <a class="code" href="classNLMISC_1_1CBSPNode2v.html#m4">P0</a> (p0), <a class="code" href="classNLMISC_1_1CBSPNode2v.html#m5">P1</a> (p1)
00204         {
00205                 <a class="code" href="classNLMISC_1_1CBSPNode2v.html#m0">Back</a> = NULL;
00206                 <a class="code" href="classNLMISC_1_1CBSPNode2v.html#m1">Front</a> = NULL;
00207                 <a class="code" href="classNLMISC_1_1CBSPNode2v.html#m2">Parent</a> = NULL;
00208                 <a class="code" href="classNLMISC_1_1CBSPNode2v.html#m6">V0</a> = v0;
00209                 <a class="code" href="classNLMISC_1_1CBSPNode2v.html#m7">V1</a> = v1;
00210         }
<a name="l00211"></a><a class="code" href="classNLMISC_1_1CBSPNode2v.html#a2">00211</a>         <a class="code" href="classNLMISC_1_1CBSPNode2v.html#a2">~CBSPNode2v</a> ()
00212         {
00213                 <font class="keywordflow">if</font> (Front)
00214                         <font class="keyword">delete</font> <a class="code" href="classNLMISC_1_1CBSPNode2v.html#m1">Front</a>;
00215                 <font class="keywordflow">if</font> (Back)
00216                         <font class="keyword">delete</font> <a class="code" href="classNLMISC_1_1CBSPNode2v.html#m0">Back</a>;
00217         }
00218 
<a name="l00219"></a><a class="code" href="classNLMISC_1_1CBSPNode2v.html#a3">00219</a>         <font class="keywordtype">void</font> <a class="code" href="classNLMISC_1_1CBSPNode2v.html#a3">insert</a> (<a class="code" href="classNLMISC_1_1CBSPNode2v.html#a0">CBSPNode2v</a> *node)
00220         {
00221                 <font class="comment">// Front ?</font>
00222                 <font class="keywordtype">bool</font> p0Front = (<a class="code" href="classNLMISC_1_1CBSPNode2v.html#m3">Plane</a> * node-&gt;P0) &gt; 0;
00223                 <font class="keywordtype">bool</font> p1Front = (<a class="code" href="classNLMISC_1_1CBSPNode2v.html#m3">Plane</a> * node-&gt;P1) &gt; 0;
00224                 <font class="keywordflow">if</font> (p0Front &amp;&amp; p1Front)
00225                 {
00226                         <font class="comment">// Front child ?</font>
00227                         <font class="keywordflow">if</font> (Front)
00228                                 <a class="code" href="classNLMISC_1_1CBSPNode2v.html#m1">Front</a>-&gt;insert (node);
00229                         <font class="keywordflow">else</font>
00230                         {
00231                                 <font class="comment">// Link left</font>
00232                                 <a class="code" href="classNLMISC_1_1CBSPNode2v.html#m1">Front</a> = node;
00233                                 node-&gt;Parent = <font class="keyword">this</font>;
00234                         }
00235                 }
00236                 <font class="keywordflow">else</font> <font class="keywordflow">if</font> ((!p0Front) &amp;&amp; (!p1Front))
00237                 {
00238                         <font class="comment">// Back child ?</font>
00239                         <font class="keywordflow">if</font> (Back)
00240                                 <a class="code" href="classNLMISC_1_1CBSPNode2v.html#m0">Back</a>-&gt;insert (node);
00241                         <font class="keywordflow">else</font>
00242                         {
00243                                 <font class="comment">// Link left</font>
00244                                 <a class="code" href="classNLMISC_1_1CBSPNode2v.html#m0">Back</a> = node;
00245                                 node-&gt;Parent = <font class="keyword">this</font>;
00246                         }
00247                 }
00248                 <font class="keywordflow">else</font>
00249                 {
00250                         <font class="comment">// Split vertex</font>
00251                         CVector newVertex = <a class="code" href="classNLMISC_1_1CBSPNode2v.html#m3">Plane</a>.intersect (node-&gt;P0, node-&gt;P1);
00252 
00253                         <font class="comment">// New node</font>
00254                         <a class="code" href="classNLMISC_1_1CBSPNode2v.html#a0">CBSPNode2v</a> *newNode = <font class="keyword">new</font> <a class="code" href="classNLMISC_1_1CBSPNode2v.html#a0">CBSPNode2v</a> (node-&gt;Plane, node-&gt;P0, newVertex, node-&gt;V0, node-&gt;V1);
00255 
00256                         <font class="comment">// Old node</font>
00257                         node-&gt;P0 = newVertex;
00258 
00259                         <font class="comment">// Insert child</font>
00260                         CBSPNode2v **p0Parent;
00261                         CBSPNode2v **p1Parent;
00262 
00263                         <font class="comment">// Get insertion pointer</font>
00264                         <font class="keywordflow">if</font> (p0Front)
00265                         {
00266                                 p0Parent = &amp;<a class="code" href="classNLMISC_1_1CBSPNode2v.html#m1">Front</a>;
00267                                 p1Parent = &amp;<a class="code" href="classNLMISC_1_1CBSPNode2v.html#m0">Back</a>;
00268                         }
00269                         <font class="keywordflow">else</font>
00270                         {
00271                                 p0Parent = &amp;<a class="code" href="classNLMISC_1_1CBSPNode2v.html#m0">Back</a>;
00272                                 p1Parent = &amp;<a class="code" href="classNLMISC_1_1CBSPNode2v.html#m1">Front</a>;
00273                         }
00274 
00275                         <font class="comment">// Insert children</font>
00276                         <font class="keywordflow">if</font> (*p0Parent)
00277                         {
00278                                 (*p0Parent)-&gt;insert (newNode);
00279                         }
00280                         <font class="keywordflow">else</font>
00281                         {
00282                                 *p0Parent = newNode;
00283                                 newNode-&gt;Parent = <font class="keyword">this</font>;
00284                         }
00285 
00286                         <font class="comment">// Insert children</font>
00287                         <font class="keywordflow">if</font> (*p1Parent)
00288                         {
00289                                 (*p1Parent)-&gt;insert (node);
00290                         }
00291                         <font class="keywordflow">else</font>
00292                         {
00293                                 *p1Parent = node;
00294                                 node-&gt;Parent = <font class="keyword">this</font>;
00295                         }
00296                 }
00297         }
00298 
<a name="l00299"></a><a class="code" href="classNLMISC_1_1CBSPNode2v.html#a4">00299</a>         <font class="keywordtype">bool</font> <a class="code" href="classNLMISC_1_1CBSPNode2v.html#a4">intersect</a> (<font class="keyword">const</font> CVector &amp;p0, <font class="keyword">const</font> CVector &amp;p1, uint v0, uint v1)<font class="keyword"> const</font>
00300 <font class="keyword">        </font>{
00301                 <font class="comment">// Front ?</font>
00302                 <font class="keywordtype">bool</font> p0Front = (<a class="code" href="classNLMISC_1_1CBSPNode2v.html#m3">Plane</a> * p0) &gt; 0;
00303                 <font class="keywordtype">bool</font> p1Front = (<a class="code" href="classNLMISC_1_1CBSPNode2v.html#m3">Plane</a> * p1) &gt; 0;
00304 
00305                 <font class="keywordflow">if</font> (p0Front != p1Front)
00306                         <font class="keywordflow">if</font> ( (v0 != <a class="code" href="classNLMISC_1_1CBSPNode2v.html#m6">V0</a>) &amp;&amp; (v0 != <a class="code" href="classNLMISC_1_1CBSPNode2v.html#m7">V1</a>) &amp;&amp; (v1 != <a class="code" href="classNLMISC_1_1CBSPNode2v.html#m6">V0</a>) &amp;&amp; (v1 != <a class="code" href="classNLMISC_1_1CBSPNode2v.html#m7">V1</a>) )
00307                                 <font class="keywordflow">if</font> (CPolygon::toConvexPolygonsEdgeIntersect ((CVector2f) <a class="code" href="classNLMISC_1_1CBSPNode2v.html#m4">P0</a>, (CVector2f) <a class="code" href="classNLMISC_1_1CBSPNode2v.html#m5">P1</a>, (CVector2f) p0, (CVector2f) p1))
00308                                         <font class="keywordflow">return</font> <font class="keyword">true</font>;
00309 
00310                 <font class="keywordflow">if</font> (p0Front || p1Front)
00311                 {
00312                         <font class="keywordflow">if</font> (Front)
00313                                 <font class="keywordflow">if</font> (<a class="code" href="classNLMISC_1_1CBSPNode2v.html#m1">Front</a>-&gt;intersect (p0, p1, v0, v1))
00314                                         <font class="keywordflow">return</font> <font class="keyword">true</font>;
00315                 }
00316 
00317                 <font class="keywordflow">if</font> ((!p0Front) || (!p1Front))
00318                 {
00319                         <font class="keywordflow">if</font> (Back)
00320                                 <font class="keywordflow">if</font> (<a class="code" href="classNLMISC_1_1CBSPNode2v.html#m0">Back</a>-&gt;intersect (p0, p1, v0, v1))
00321                                         <font class="keywordflow">return</font> <font class="keyword">true</font>;
00322                 }
00323 
00324                 <font class="keywordflow">return</font> <font class="keyword">false</font>;
00325         }
00326 
<a name="l00327"></a><a class="code" href="classNLMISC_1_1CBSPNode2v.html#m2">00327</a>         <a class="code" href="classNLMISC_1_1CBSPNode2v.html#a0">CBSPNode2v</a>      *<a class="code" href="classNLMISC_1_1CBSPNode2v.html#m0">Back</a>, *<a class="code" href="classNLMISC_1_1CBSPNode2v.html#m1">Front</a>, *<a class="code" href="classNLMISC_1_1CBSPNode2v.html#m2">Parent</a>;
<a name="l00328"></a><a class="code" href="classNLMISC_1_1CBSPNode2v.html#m3">00328</a>         CPlane          <a class="code" href="classNLMISC_1_1CBSPNode2v.html#m3">Plane</a>;
<a name="l00329"></a><a class="code" href="classNLMISC_1_1CBSPNode2v.html#m4">00329</a>         CVector         <a class="code" href="classNLMISC_1_1CBSPNode2v.html#m4">P0</a>;
<a name="l00330"></a><a class="code" href="classNLMISC_1_1CBSPNode2v.html#m5">00330</a>         CVector         <a class="code" href="classNLMISC_1_1CBSPNode2v.html#m5">P1</a>;
<a name="l00331"></a><a class="code" href="classNLMISC_1_1CBSPNode2v.html#m6">00331</a>         uint            <a class="code" href="classNLMISC_1_1CBSPNode2v.html#m6">V0</a>;
<a name="l00332"></a><a class="code" href="classNLMISC_1_1CBSPNode2v.html#m7">00332</a>         uint            <a class="code" href="classNLMISC_1_1CBSPNode2v.html#m7">V1</a>;
00333 };
00334 
00335 <font class="comment">// ***************************************************************************</font>
00336 
<a name="l00337"></a><a class="code" href="classNLMISC_1_1CPolygon.html#d1">00337</a> <font class="keywordtype">bool</font> CPolygon::toConvexPolygonsLeft (<font class="keyword">const</font> std::vector&lt;CVector&gt; &amp;vertex, uint a, uint b, uint c)
00338 {
00339         <font class="keywordflow">return</font> ( (vertex[b].x - vertex[a].x) * (vertex[c].y - vertex[a].y) - (vertex[c].x - vertex[a].x) * (vertex[b].y - vertex[a].y) ) &lt; 0;
00340 }
00341 
00342 <font class="comment">// ***************************************************************************</font>
00343 
<a name="l00344"></a><a class="code" href="classNLMISC_1_1CPolygon.html#d2">00344</a> <font class="keywordtype">bool</font> CPolygon::toConvexPolygonsLeftOn (<font class="keyword">const</font> std::vector&lt;CVector&gt; &amp;vertex, uint a, uint b, uint c)
00345 {
00346         <font class="keywordflow">return</font> ( (vertex[b].x - vertex[a].x) * (vertex[c].y - vertex[a].y) - (vertex[c].x - vertex[a].x) * (vertex[b].y - vertex[a].y) ) &lt;= 0;
00347 }
00348 
00349 <font class="comment">// ***************************************************************************</font>
00350 
<a name="l00351"></a><a class="code" href="classNLMISC_1_1CPolygon.html#d3">00351</a> <font class="keywordtype">bool</font> CPolygon::toConvexPolygonsInCone (<font class="keyword">const</font> std::vector&lt;CVector&gt; &amp;vertex, uint a, uint b)
00352 {
00353         <font class="comment">// Prev and next</font>
00354         uint a0 = a+1;
00355         <font class="keywordflow">if</font> (a0==vertex.size())
00356                 a0=0;
00357         uint a1;
00358         <font class="keywordflow">if</font> (a==0)
00359                 a1=vertex.size()-1;
00360         <font class="keywordflow">else</font>
00361                 a1= a-1;
00362 
00363         <font class="keywordflow">if</font> (<a class="code" href="classNLMISC_1_1CPolygon.html#d2">toConvexPolygonsLeftOn</a> (vertex, a, a1, a0) )
00364         {
00365                 <font class="keywordflow">return</font> <a class="code" href="classNLMISC_1_1CPolygon.html#d1">toConvexPolygonsLeft</a> ( vertex, a, b, a0) &amp;&amp; <a class="code" href="classNLMISC_1_1CPolygon.html#d1">toConvexPolygonsLeft</a> ( vertex, b, a, a1);
00366         }
00367         <font class="keywordflow">else</font>
00368         {
00369                 <font class="keywordflow">return</font> !( <a class="code" href="classNLMISC_1_1CPolygon.html#d1">toConvexPolygonsLeft</a> ( vertex, a, b, a1) &amp;&amp; <a class="code" href="classNLMISC_1_1CPolygon.html#d1">toConvexPolygonsLeft</a> ( vertex, b, a, a0) );
00370         }
00371 }
00372 
00373 <font class="comment">// ***************************************************************************</font>
00374 
<a name="l00375"></a><a class="code" href="classNLMISC_1_1CPolygon.html#d4">00375</a> <font class="keywordtype">bool</font> CPolygon::toConvexPolygonsDiagonal (<font class="keyword">const</font> std::vector&lt;CVector&gt; &amp;vertex, <font class="keyword">const</font> CBSPNode2v &amp;bsp, uint a, uint b)
00376 {
00377         <font class="comment">// Check it is a border</font>
00378         <font class="keywordflow">if</font> ( ( (b - a) == 1) || ( (a - b) == 1) || ( (a==0) &amp;&amp; (b ==(vertex.size()-1))) || ( (b==0) &amp;&amp; (a ==(vertex.size()-1))) )
00379                 <font class="keywordflow">return</font> <font class="keyword">true</font>;
00380 
00381         <font class="comment">// Check visibility</font>
00382         <font class="keywordflow">if</font> (<a class="code" href="classNLMISC_1_1CPolygon.html#d3">toConvexPolygonsInCone</a> (vertex, a, b) &amp;&amp; <a class="code" href="classNLMISC_1_1CPolygon.html#d3">toConvexPolygonsInCone</a> (vertex, b, a))
00383         {
00384                 <font class="comment">// Intersection ?</font>
00385                 <font class="keywordflow">return</font> !bsp.intersect (vertex[a], vertex[b], a, b);
00386         }
00387         <font class="keywordflow">return</font> <font class="keyword">false</font>;
00388 }
00389 
00390 <font class="comment">// ***************************************************************************</font>
00391 
<a name="l00392"></a><a class="code" href="classNLMISC_1_1CPolygon.html#a10">00392</a> <font class="keywordtype">void</font> CPolygon::toConvexPolygonsLocalAndBSP (std::vector&lt;CVector&gt; &amp;localVertices, CBSPNode2v &amp;root, <font class="keyword">const</font> CMatrix &amp;basis)<font class="keyword"> const</font>
00393 <font class="keyword"></font>{
00394         <font class="comment">// Invert matrix</font>
00395         CMatrix invert = basis;
00396         invert.invert ();
00397 
00398         <font class="comment">// Insert vertices in an ordered table</font>
00399         uint vertexCount = <a class="code" href="classNLMISC_1_1CPolygon.html#m0">Vertices</a>.size();
00400         <a class="code" href="namespaceNLMISC.html#a199">TCConcavePolygonsVertexMap</a> vertexMap;
00401         localVertices.resize (vertexCount);
00402         uint i, j;
00403         
00404         <font class="comment">// Transform the vertex</font>
00405         <font class="keywordflow">for</font> (i=0; i&lt;vertexCount; i++)
00406         {
00407                 CVector local = invert*<a class="code" href="classNLMISC_1_1CPolygon.html#m0">Vertices</a>[i];
00408                 localVertices[i] = CVector (local.x, local.y, 0);
00409         }
00410 
00411         <font class="comment">// Plane direction</font>
00412         i=0;
00413         j=<a class="code" href="classNLMISC_1_1CPolygon.html#m0">Vertices</a>.size()-1;
00414         CVector normal = localVertices[i] - localVertices[j];
00415         normal = normal ^ CVector::K;
00416         CPlane clipPlane;
00417         clipPlane.make(normal, localVertices[i]);
00418 
00419         <font class="comment">// Build the BSP root</font>
00420         root = CBSPNode2v (clipPlane, localVertices[i], localVertices[j], i, j);
00421 
00422         <font class="comment">// Insert all others edges</font>
00423         j=i++;
00424         <font class="keywordflow">for</font> (; i&lt;<a class="code" href="classNLMISC_1_1CPolygon.html#m0">Vertices</a>.size(); i++)
00425         {
00426                 <font class="comment">// Plane direction</font>
00427                 normal = localVertices[i] - localVertices[j];
00428                 normal = normal ^ CVector::K;
00429                 clipPlane.make(normal, localVertices[i]);
00430 
00431                 <font class="comment">// Build the BSP root</font>
00432                 root.insert ( <font class="keyword">new</font> CBSPNode2v (clipPlane, localVertices[i], localVertices[j], i, j) );
00433 
00434                 j=i;
00435         }
00436 }
00437 
00438 <font class="comment">// ***************************************************************************</font>
00439 
<a name="l00440"></a><a class="code" href="classNLMISC_1_1CPolygon.html#a6">00440</a> <font class="keywordtype">bool</font> CPolygon::toConvexPolygons (<a class="code" href="classstd_1_1list.html">std::list&lt;CPolygon&gt;</a>&amp; outputPolygons, <font class="keyword">const</font> CMatrix&amp; basis)<font class="keyword"> const</font>
00441 <font class="keyword"></font>{
00442         <font class="comment">// Some vertices ?</font>
00443         <font class="keywordflow">if</font> (<a class="code" href="classNLMISC_1_1CPolygon.html#m0">Vertices</a>.size()&gt;2)
00444         {
00445                 <font class="comment">// Local vertices</font>
00446                 std::vector&lt;CVector&gt;    localVertices;
00447 
00448                 <font class="comment">// Build the BSP root</font>
00449                 CBSPNode2v root;
00450 
00451                 <font class="comment">// Build the local array and the BSP</font>
00452                 <a class="code" href="classNLMISC_1_1CPolygon.html#a10">toConvexPolygonsLocalAndBSP</a> (localVertices, root, basis);
00453 
00454                 <font class="comment">// Build a vertex list</font>
00455                 <a class="code" href="classstd_1_1list.html">std::list&lt;uint&gt;</a> vertexList;
00456                 uint i;
00457                 <font class="keywordflow">for</font> (i=0; i&lt;<a class="code" href="classNLMISC_1_1CPolygon.html#m0">Vertices</a>.size(); i++)
00458                         vertexList.push_back (i);
00459 
00460                 <font class="comment">// Clip ears while there is some polygons</font>
00461                 <a class="code" href="classstd_1_1list.html">std::list&lt;uint&gt;</a>::iterator current=vertexList.begin();
00462                 <a class="code" href="classstd_1_1list.html">std::list&lt;uint&gt;</a>::iterator begin=vertexList.begin();
00463                 <font class="keywordflow">do</font>
00464                 {
00465 again:;
00466                         <font class="comment">// Search for a diagonal</font>
00467                         <font class="keywordtype">bool</font> found = <font class="keyword">false</font>;
00468 
00469                         <font class="comment">// Get next vertex</font>
00470                         <a class="code" href="classstd_1_1list.html">std::list&lt;uint&gt;</a>::iterator first = current;
00471                         <a class="code" href="classstd_1_1list.html">std::list&lt;uint&gt;</a>::iterator lastPreviousPrevious=current;
00472                         <a class="code" href="classstd_1_1list.html">std::list&lt;uint&gt;</a>::iterator lastPrevious=current;
00473                         lastPrevious++;
00474                         <font class="keywordflow">if</font> (lastPrevious==vertexList.end())
00475                                 lastPrevious = vertexList.begin();
00476                         <a class="code" href="classstd_1_1list.html">std::list&lt;uint&gt;</a>::iterator currentNext = lastPrevious;
00477                         <a class="code" href="classstd_1_1list.html">std::list&lt;uint&gt;</a>::iterator last = lastPrevious;
00478                         last++;
00479                         <font class="keywordflow">if</font> (last==vertexList.end())
00480                                 last = vertexList.begin();
00481                         <font class="keywordflow">while</font> (last != current)
00482                         {
00483                                 <font class="comment">// Is a diagonal ?</font>
00484                                 <font class="keywordflow">if</font> ( 
00485                                         (<a class="code" href="classNLMISC_1_1CPolygon.html#d4">toConvexPolygonsDiagonal</a> (localVertices, root, *lastPreviousPrevious, *last)) &amp;&amp;
00486                                         (<a class="code" href="classNLMISC_1_1CPolygon.html#d4">toConvexPolygonsDiagonal</a> (localVertices, root, *currentNext, *last)) &amp;&amp;
00487                                         (<a class="code" href="classNLMISC_1_1CPolygon.html#d4">toConvexPolygonsDiagonal</a> (localVertices, root, *last, *current)) 
00488                                         )
00489                                 {
00490                                         <font class="comment">// Find one</font>
00491                                         found = <font class="keyword">true</font>;
00492                                 }
00493                                 <font class="keywordflow">else</font>
00494                                 {
00495                                         <font class="comment">// Come back</font>
00496                                         last = lastPrevious;
00497                                         lastPrevious = lastPreviousPrevious;
00498                                         <font class="keywordflow">break</font>;
00499                                 }
00500 
00501                                 <font class="comment">// Next vertex</font>
00502                                 lastPreviousPrevious = lastPrevious;
00503                                 lastPrevious = last++;
00504                                 <font class="keywordflow">if</font> (last==vertexList.end())
00505                                         last = vertexList.begin();
00506                         }
00507 
00508                         <font class="comment">// Last polygon ?</font>
00509                         <font class="keywordflow">if</font> (last==current)
00510                         {
00511                                 <font class="comment">// Add a polygon</font>
00512                                 outputPolygons.push_back (<a class="code" href="classNLMISC_1_1CPolygon.html#a0">CPolygon</a>());
00513                                 <a class="code" href="classNLMISC_1_1CPolygon.html#a0">CPolygon</a> &amp;back = outputPolygons.back ();
00514                                 back.Vertices.reserve (vertexList.size());
00515 
00516                                 <font class="comment">// Add each vertex in the new polygon</font>
00517                                 current=vertexList.begin();
00518                                 <font class="keywordflow">while</font> (current!=vertexList.end())
00519                                 {
00520                                         back.Vertices.push_back (<a class="code" href="classNLMISC_1_1CPolygon.html#m0">Vertices</a>[*current]);
00521                                         current++;
00522                                 }
00523 
00524                                 <font class="comment">// Exit</font>
00525                                 <font class="keywordflow">return</font> <font class="keyword">true</font>;
00526                         }
00527                         <font class="keywordflow">else</font>
00528                         {
00529                                 <a class="code" href="classstd_1_1list.html">std::list&lt;uint&gt;</a>::iterator firstNext = current;
00530                                 <a class="code" href="classstd_1_1list.html">std::list&lt;uint&gt;</a>::iterator firstNextNext = currentNext;
00531                                 <font class="keywordflow">if</font> (first != vertexList.begin())
00532                                         first--;
00533                                 <font class="keywordflow">else</font>
00534                                 {
00535                                         first = vertexList.end();
00536                                         first--;
00537                                 }
00538 
00539                                 <font class="keywordflow">while</font> (current != first)
00540                                 {
00541                                         <font class="comment">// Is a diagonal ?</font>
00542                                         <font class="keywordflow">if</font> (
00543                                                 (<a class="code" href="classNLMISC_1_1CPolygon.html#d4">toConvexPolygonsDiagonal</a> (localVertices, root, *firstNextNext, *first)) &amp;&amp;
00544                                                 (<a class="code" href="classNLMISC_1_1CPolygon.html#d4">toConvexPolygonsDiagonal</a> (localVertices, root, *lastPrevious, *first)) &amp;&amp;
00545                                                 (<a class="code" href="classNLMISC_1_1CPolygon.html#d4">toConvexPolygonsDiagonal</a> (localVertices, root, *last, *first)) 
00546                                                 )
00547                                         {
00548                                                 <font class="comment">// Find one</font>
00549                                                 found = <font class="keyword">true</font>;
00550                                         }
00551                                         <font class="keywordflow">else</font>
00552                                         {
00553                                                 <font class="comment">// Come back</font>
00554                                                 first = firstNext;
00555                                                 <font class="keywordflow">break</font>;
00556                                         }
00557 
00558                                         <font class="comment">// Next vertex</font>
00559                                         firstNextNext = firstNext;
00560                                         firstNext = first;
00561                                         <font class="keywordflow">if</font> (first==vertexList.begin())
00562                                         {
00563                                                 first = vertexList.end();
00564                                                 first--;
00565                                         }
00566                                         <font class="keywordflow">else</font>
00567                                                 first--;
00568                                 }
00569                         }
00570 
00571                         <font class="comment">// Found ?</font>
00572                         <font class="keywordflow">if</font> (found)
00573                         {
00574                                 <font class="comment">// Count vertex</font>
00575                                 outputPolygons.push_back (<a class="code" href="classNLMISC_1_1CPolygon.html#a0">CPolygon</a>());
00576                                 <a class="code" href="classNLMISC_1_1CPolygon.html#a0">CPolygon</a> &amp;back = outputPolygons.back ();
00577 
00578                                 <font class="comment">// Vertex count</font>
00579                                 uint vertexCount = 1;
00580                                 current = first;
00581                                 <font class="keywordflow">while</font> (current != last)
00582                                 {
00583                                         vertexCount++;
00584                                         current++;
00585                                         <font class="keywordflow">if</font> (current == vertexList.end())
00586                                                 current = vertexList.begin();
00587                                 }
00588 
00589                                 <font class="comment">// Alloc vertices</font>
00590                                 back.Vertices.reserve (vertexCount);
00591 
00592                                 <font class="comment">// Copy and remove vertices</font>
00593                                 back.Vertices.push_back (<a class="code" href="classNLMISC_1_1CPolygon.html#m0">Vertices</a>[*first]);
00594                                 first++;
00595                                 <font class="keywordflow">if</font> (first == vertexList.end())
00596                                         first = vertexList.begin();
00597                                 <font class="keywordflow">while</font> (first != last)
00598                                 {
00599                                         back.Vertices.push_back (<a class="code" href="classNLMISC_1_1CPolygon.html#m0">Vertices</a>[*first]);
00600 
00601                                         <font class="comment">// Remove from list</font>
00602                                         first = vertexList.erase (first);
00603                                         <font class="keywordflow">if</font> (first == vertexList.end())
00604                                                 first = vertexList.begin();
00605                                         <a class="code" href="debug_8h.html#a6">nlassert</a> (first != vertexList.end());
00606                                 }
00607                                 back.Vertices.push_back (<a class="code" href="classNLMISC_1_1CPolygon.html#m0">Vertices</a>[*first]);
00608                                 current = begin = last;
00609                                 <font class="keywordflow">goto</font> again;
00610                         }
00611 
00612                         <font class="comment">// Next current</font>
00613                         current++;
00614                         <font class="keywordflow">if</font> (current == vertexList.end())
00615                                 current = vertexList.begin ();
00616                 }
00617                 <font class="keywordflow">while</font> (current != begin);
00618         }
00619         <font class="keywordflow">return</font> <font class="keyword">false</font>;
00620 }
00621 
00622 <font class="comment">// ***************************************************************************</font>
00623 
<a name="l00624"></a><a class="code" href="classNLMISC_1_1CPolygon.html#a7">00624</a> <font class="keywordtype">bool</font> CPolygon::chain (<font class="keyword">const</font> std::vector&lt;CPolygon&gt; &amp;other, <font class="keyword">const</font> CMatrix&amp; basis)
00625 {
00626         <font class="comment">// Local vertices</font>
00627         std::vector&lt;CVector&gt;    localVertices;
00628 
00629         <font class="comment">// Build the BSP root</font>
00630         CBSPNode2v root;
00631 
00632         <font class="comment">// Build the local array and the BSP</font>
00633         <a class="code" href="classNLMISC_1_1CPolygon.html#a10">toConvexPolygonsLocalAndBSP</a> (localVertices, root, basis);
00634 
00635         <font class="comment">// Local vertices</font>
00636         std::vector&lt;std::vector&lt;CVector&gt; &gt;      localVerticesOther (other.size());
00637 
00638         <font class="comment">// Build the BSP root</font>
00639         std::vector&lt;CBSPNode2v&gt; rootOther (other.size());
00640 
00641         <font class="comment">// Build a copy of the polygons</font>
00642         std::vector&lt;CPolygon&gt; copy = other;
00643 
00644         <font class="comment">// Main copy</font>
00645         <a class="code" href="classNLMISC_1_1CPolygon.html#a0">CPolygon</a> mainCopy = *<font class="keyword">this</font>;
00646 
00647         <font class="comment">// For each other polygons</font>
00648         uint o;
00649         <font class="keywordflow">for</font> (o=0; o&lt;other.size(); o++)
00650         {
00651                 <font class="comment">// Build the local array and the BSP</font>
00652                 other[o].toConvexPolygonsLocalAndBSP (localVerticesOther[o], rootOther[o], basis);
00653         }
00654 
00655         <font class="comment">// Look for a couple..</font>
00656         uint thisCount = <a class="code" href="classNLMISC_1_1CPolygon.html#m0">Vertices</a>.size();
00657         uint i, j;
00658         <font class="keywordflow">for</font> (o=0; o&lt;other.size(); o++)
00659         {
00660                 uint otherCount = other[o].Vertices.size();
00661 
00662                 <font class="comment">// Try to link in the main polygon</font>
00663                 <font class="keywordflow">for</font> (i=0; i&lt;thisCount; i++)
00664                 {
00665                         <font class="keywordflow">for</font> (j=0; j&lt;otherCount; j++)
00666                         {
00667                                 <font class="comment">// Test this segement</font>
00668                                 <font class="keywordflow">if</font> (!root.intersect (localVertices[i], localVerticesOther[o][j], i, 0xffffffff))
00669                                 {
00670                                         <font class="comment">// Test each other polygons</font>
00671                                         uint otherO;
00672                                         <font class="keywordflow">for</font> (otherO=0; otherO&lt;other.size(); otherO++)
00673                                         {
00674                                                 <font class="comment">// Intersect ?</font>
00675                                                 <font class="keywordflow">if</font> (rootOther[otherO].intersect (localVertices[i], localVerticesOther[o][j], 0xffffffff, (otherO == o)?j:0xffffffff))
00676                                                         <font class="keywordflow">break</font>;
00677                                         }
00678 
00679                                         <font class="comment">// Continue ?</font>
00680                                         <font class="keywordflow">if</font> (otherO==other.size())
00681                                         {
00682                                                 <font class="comment">// Insert new vertices</font>
00683                                                 mainCopy.Vertices.insert (mainCopy.Vertices.begin()+i, 2+otherCount, CVector());
00684 
00685                                                 <font class="comment">// Copy the first vertex</font>
00686                                                 mainCopy.Vertices[i] = mainCopy.Vertices[i+otherCount+2];
00687 
00688                                                 <font class="comment">// Copy the new vertices</font>
00689                                                 uint k;
00690                                                 <font class="keywordflow">for</font> (k=0; k&lt;otherCount; k++)
00691                                                 {
00692                                                         uint <a class="code" href="driver__opengl__extension__def_8h.html#a358">index</a> = j+k;
00693                                                         <font class="keywordflow">if</font> (<a class="code" href="driver__opengl__extension__def_8h.html#a358">index</a>&gt;=otherCount)
00694                                                                 <a class="code" href="driver__opengl__extension__def_8h.html#a358">index</a> -= otherCount;
00695                                                         mainCopy.Vertices[i+k+1] = copy[o].Vertices[<a class="code" href="driver__opengl__extension__def_8h.html#a358">index</a>];
00696                                                 }
00697 
00698                                                 <font class="comment">// Copy the last one</font>
00699                                                 mainCopy.Vertices[i+otherCount+1] = copy[o].Vertices[j];
00700                                                 <font class="keywordflow">break</font>;
00701                                         }
00702                                 }
00703                         }
00704                         <font class="keywordflow">if</font> (j!=otherCount)
00705                                 <font class="keywordflow">break</font>;
00706                 }
00707 
00708                 <font class="comment">// Not found ?</font>
00709                 <font class="keywordflow">if</font> (i==thisCount)
00710                 {
00711                         <font class="comment">// Try to link in the sub polygons</font>
00712                         uint otherToCheck;
00713                         <font class="keywordflow">for</font> (otherToCheck=o+1; otherToCheck&lt;other.size(); otherToCheck++)
00714                         {
00715                                 uint otherToCheckCount = other[otherToCheck].Vertices.size();
00716                                 <font class="keywordflow">for</font> (i=0; i&lt;otherToCheckCount; i++)
00717                                 {
00718                                         <font class="keywordflow">for</font> (j=0; j&lt;otherCount; j++)
00719                                         {
00720                                                 <font class="comment">// Test this segement</font>
00721                                                 <font class="keywordflow">if</font> (!rootOther[otherToCheck].intersect (localVerticesOther[otherToCheck][i], localVerticesOther[o][j], i, 0xffffffff))
00722                                                 {
00723                                                         <font class="comment">// Test each other polygons</font>
00724                                                         uint otherO;
00725                                                         <font class="keywordflow">for</font> (otherO=0; otherO&lt;other.size(); otherO++)
00726                                                         {
00727                                                                 <font class="comment">// Intersect ?</font>
00728                                                                 <font class="keywordflow">if</font> (rootOther[otherO].intersect (localVerticesOther[otherToCheck][i], localVerticesOther[o][j],  (otherToCheck == otherO)?i:0xffffffff,  (otherO == o)?j:0xffffffff))
00729                                                                         <font class="keywordflow">break</font>;
00730                                                         }
00731 
00732                                                         <font class="comment">// Continue ?</font>
00733                                                         <font class="keywordflow">if</font> (otherO==other.size())
00734                                                         {
00735                                                                 <font class="comment">// Insert new vertices</font>
00736                                                                 copy[otherToCheck].Vertices.insert (copy[otherToCheck].<a class="code" href="classNLMISC_1_1CPolygon.html#m0">Vertices</a>.begin()+i, 2+otherCount, CVector());
00737 
00738                                                                 <font class="comment">// Copy the first vertex</font>
00739                                                                 copy[otherToCheck].Vertices[i] = copy[otherToCheck].Vertices[i+otherCount+2];
00740 
00741                                                                 <font class="comment">// Copy the new vertices</font>
00742                                                                 uint k;
00743                                                                 <font class="keywordflow">for</font> (k=0; k&lt;otherCount; k++)
00744                                                                 {
00745                                                                         uint <a class="code" href="driver__opengl__extension__def_8h.html#a358">index</a> = j+k;
00746                                                                         <font class="keywordflow">if</font> (<a class="code" href="driver__opengl__extension__def_8h.html#a358">index</a>&gt;=otherCount)
00747                                                                                 <a class="code" href="driver__opengl__extension__def_8h.html#a358">index</a> -= otherCount;
00748                                                                         copy[otherToCheck].Vertices[i+k+1] = copy[otherO].Vertices[<a class="code" href="driver__opengl__extension__def_8h.html#a358">index</a>];
00749                                                                 }
00750 
00751                                                                 <font class="comment">// Copy the last one</font>
00752                                                                 copy[otherToCheck].Vertices[i+otherCount+1] = copy[otherO].Vertices[j];
00753                                                                 <font class="keywordflow">break</font>;
00754                                                         }
00755                                                 }
00756                                         }
00757                                         <font class="keywordflow">if</font> (j!=otherCount)
00758                                                 <font class="keywordflow">break</font>;
00759                                 }
00760                                 <font class="keywordflow">if</font> (i!=otherToCheckCount)
00761                                         <font class="keywordflow">break</font>;
00762                         }
00763                         <font class="keywordflow">if</font> (otherToCheck==other.size())
00764                         {
00765                                 <font class="comment">// Not ok</font>
00766                                 <font class="keywordflow">return</font> <font class="keyword">false</font>;
00767                         }
00768                 }
00769         }
00770 
00771         <font class="comment">// Ok</font>
00772         *<font class="keyword">this</font> = mainCopy;
00773         <font class="keywordflow">return</font> <font class="keyword">true</font>;
00774 }
00775 
00776 <font class="comment">// ***************************************************************************</font>
00777 
00778 
00779 <font class="comment">//====================================//</font>
00780 <font class="comment">//              CPolygon2d implementation     //</font>
00781 <font class="comment">//====================================//</font>
00782 
00783 
00784 
<a name="l00785"></a><a class="code" href="classNLMISC_1_1CPolygon2D.html#a1">00785</a> CPolygon2D::CPolygon2D(<font class="keyword">const</font> CPolygon &amp;<a class="code" href="driver__opengl__extension__def_8h.html#a409">src</a>, <font class="keyword">const</font> CMatrix &amp;projMat)
00786 {
00787         uint size = <a class="code" href="driver__opengl__extension__def_8h.html#a409">src</a>.Vertices.size();
00788         <a class="code" href="classNLMISC_1_1CPolygon2D.html#m0">Vertices</a>.resize(size);
00789         <font class="keywordflow">for</font> (uint k = 0; k &lt; size; ++k)
00790         {
00791                 CVector proj = projMat * <a class="code" href="driver__opengl__extension__def_8h.html#a409">src</a>.Vertices[k];
00792                 <a class="code" href="classNLMISC_1_1CPolygon2D.html#m0">Vertices</a>[k].set(proj.x, proj.y);
00793         }
00794 }
00795 
00796 <font class="comment">// ***************************************************************************</font>
00797 
<a name="l00798"></a><a class="code" href="classNLMISC_1_1CPolygon2D.html#a3">00798</a> <font class="keywordtype">bool</font>            CPolygon2D::isConvex()
00799 {
00800         <font class="keywordtype">bool</font> Front  = <font class="keyword">true</font>, Back = <font class="keyword">false</font>;       
00801         <font class="comment">// we apply a dummy algo for now : check wether every vertex is in the same side </font>
00802         <font class="comment">// of every plane defined by a segment of this poly</font>
00803         uint numVerts = <a class="code" href="classNLMISC_1_1CPolygon2D.html#m0">Vertices</a>.size();
00804         <font class="keywordflow">if</font> (numVerts &lt; 3) <font class="keywordflow">return</font> <font class="keyword">true</font>;
00805         CVector         segStart, segEnd;
00806         CPlane          clipPlane;
00807         <font class="keywordflow">for</font> (TVec2fVect::const_iterator it = <a class="code" href="classNLMISC_1_1CPolygon2D.html#m0">Vertices</a>.begin(); it != <a class="code" href="classNLMISC_1_1CPolygon2D.html#m0">Vertices</a>.end(); ++it)
00808         {               
00809                 segStart.set(it-&gt;x, it-&gt;y, 0);            <font class="comment">// segment start</font>
00810                 segEnd.set((it + 1)-&gt;<a class="code" href="driver__opengl__extension__def_8h.html#a364">x</a>, (it + 1)-&gt;<a class="code" href="driver__opengl__extension__def_8h.html#a365">y</a>, 0);  <font class="comment">// segment end</font>
00811                 <font class="keywordtype">float</font> n = (segStart - segEnd).norm();     <font class="comment">// segment norm</font>
00812                 <font class="keywordflow">if</font> (n != 0)
00813                 {
00814                         clipPlane.make(segStart, segEnd, (n &gt; 10 ? n : 10) * CVector::K + segStart); <font class="comment">// make a plane, with this segment and the poly normal</font>
00815                         <font class="comment">// check each other vertices against this plane</font>
00816                         <font class="keywordflow">for</font> (TVec2fVect::const_iterator it2 = <a class="code" href="classNLMISC_1_1CPolygon2D.html#m0">Vertices</a>.begin(); it2 != <a class="code" href="classNLMISC_1_1CPolygon2D.html#m0">Vertices</a>.end(); ++it2)
00817                         {
00818                                 <font class="keywordflow">if</font> (it2 != it &amp;&amp; it2 != (it + 1)) <font class="comment">// the vertices must not be part of the test plane (because of imprecision)</font>
00819                                 {
00820 
00821                                         <font class="keywordtype">float</font> dist  = clipPlane * CVector(it2-&gt;x, it2-&gt; <a class="code" href="driver__opengl__extension__def_8h.html#a365">y</a>, 0);
00822                                         <font class="keywordflow">if</font> (dist != 0) <font class="comment">// midlle pos</font>
00823                                         {
00824                                                 <font class="keywordflow">if</font> (dist &gt; 0) Front = <font class="keyword">true</font>; <font class="keywordflow">else</font> Back = <font class="keyword">true</font>;                                   
00825                                                 <font class="keywordflow">if</font> (Front &amp;&amp; Back) <font class="keywordflow">return</font> <font class="keyword">false</font>; <font class="comment">// there are both front end back vertices -&gt; failure</font>
00826                                         }
00827                                 }
00828                         }
00829                 }
00830         }
00831         <font class="keywordflow">return</font> <font class="keyword">true</font>;
00832 }
00833 
00834 <font class="comment">// ***************************************************************************</font>
00835 
<a name="l00836"></a><a class="code" href="classNLMISC_1_1CPolygon2D.html#a4">00836</a> <font class="keywordtype">void</font>            CPolygon2D::buildConvexHull(CPolygon2D &amp;dest)<font class="keyword"> const</font>
00837 <font class="keyword"></font>{
00838         <a class="code" href="debug_8h.html#a6">nlassert</a>(&amp;dest != <font class="keyword">this</font>);
00839 
00840         <font class="keywordflow">if</font> (this-&gt;<a class="code" href="classNLMISC_1_1CPolygon2D.html#m0">Vertices</a>.size() == 3) <font class="comment">// with 3 points it is always convex</font>
00841         {
00842                 dest = *<font class="keyword">this</font>;
00843                 <font class="keywordflow">return</font>;
00844         }
00845         uint k, <a class="code" href="namespaceNLAISCRIPT.html#a20">l</a>;
00846         uint numVerts = <a class="code" href="classNLMISC_1_1CPolygon2D.html#m0">Vertices</a>.size();        
00847         CVector2f p, curr, prev;
00848         uint      pIndex, p1Index, p2Index, pCurr, pPrev;
00849         <font class="comment">// this is not optimized, but not used in realtime.. =)</font>
00850         <a class="code" href="debug_8h.html#a6">nlassert</a>(numVerts &gt;= 3);
00851         dest.Vertices.clear();
00852 
00853         <font class="keyword">typedef</font> std::set&lt;uint&gt; TIndexSet;
00854         TIndexSet leftIndex;
00855         <font class="keywordflow">for</font> (k = 0; k &lt; <a class="code" href="classNLMISC_1_1CPolygon2D.html#m0">Vertices</a>.size(); ++k)
00856         {
00857                 leftIndex.insert(k);
00858         }
00859         
00860 
00861         <font class="comment">// 1�) find the highest point p of the set. We are sure it belongs to the hull</font>
00862         pIndex = 0;
00863         p = <a class="code" href="classNLMISC_1_1CPolygon2D.html#m0">Vertices</a>[0];
00864         <font class="keywordflow">for</font> (k = 1; k &lt; numVerts; ++k)
00865         {
00866                 <font class="keywordflow">if</font> (<a class="code" href="classNLMISC_1_1CPolygon2D.html#m0">Vertices</a>[k].y &lt; p.y)
00867                 {
00868                         pIndex = k;
00869                         p = <a class="code" href="classNLMISC_1_1CPolygon2D.html#m0">Vertices</a>[k];
00870                 }
00871         }
00872 
00873         leftIndex.erase(pIndex);
00874 
00875 
00876         <font class="keywordtype">float</font> bestCP = 1.1f;
00877         p1Index = p2Index = pIndex;
00878 
00879         <font class="keywordflow">for</font> (k = 0; k &lt; numVerts; ++k)
00880         {
00881                 <font class="keywordflow">if</font> (k != pIndex)
00882                 {
00883                         <font class="keywordflow">for</font> (<a class="code" href="namespaceNLAISCRIPT.html#a20">l</a> = 0; <a class="code" href="namespaceNLAISCRIPT.html#a20">l</a> &lt; numVerts; ++<a class="code" href="namespaceNLAISCRIPT.html#a20">l</a>)
00884                         {
00885                                 <font class="keywordflow">if</font> (<a class="code" href="namespaceNLAISCRIPT.html#a20">l</a> != pIndex &amp;&amp; <a class="code" href="namespaceNLAISCRIPT.html#a20">l</a> != k)
00886                                 {
00887                                         CVector2f seg1 = (<a class="code" href="classNLMISC_1_1CPolygon2D.html#m0">Vertices</a>[<a class="code" href="namespaceNLAISCRIPT.html#a20">l</a>] - p).normed();
00888                                         CVector2f seg2 = (<a class="code" href="classNLMISC_1_1CPolygon2D.html#m0">Vertices</a>[k] - p).normed();
00889 
00890                                         <font class="comment">//CVector cp = CVector(seg1.x, seg1.y, 0) ^ CVector(seg2.x, seg2.y, 0);</font>
00891                                         <font class="comment">//float n = fabsf(cp.z);</font>
00892                                         <font class="keywordtype">float</font> n = seg1 * seg2;
00893                                         <font class="keywordflow">if</font> (n &lt; bestCP)
00894                                         {
00895                                                 p1Index = <a class="code" href="namespaceNLAISCRIPT.html#a20">l</a>;
00896                                                 p2Index = k;
00897                                                 bestCP  = n;
00898                                         }
00899                                 }
00900                         }
00901                 }
00902         }
00903 
00904 
00905         leftIndex.erase(p2Index);
00906 
00907         
00908 
00909         <font class="comment">// start from the given triplet, and complete the poly until we reach the first point</font>
00910         pCurr = p2Index;
00911         pPrev = pIndex;
00912 
00913         curr = <a class="code" href="classNLMISC_1_1CPolygon2D.html#m0">Vertices</a>[pCurr];
00914         prev = <a class="code" href="classNLMISC_1_1CPolygon2D.html#m0">Vertices</a>[pPrev];
00915 
00916         <font class="comment">// create the first triplet vertices</font>
00917         dest.Vertices.push_back(<a class="code" href="classNLMISC_1_1CPolygon2D.html#m0">Vertices</a>[p1Index]);
00918         dest.Vertices.push_back(prev);
00919         dest.Vertices.push_back(curr); 
00920 
00921         uint step = 0;
00922 
00923         <font class="keywordflow">for</font>(;;)
00924         {               
00925                 bestCP = 1.1f;          
00926                 CVector2f seg2 = (prev - curr).normed();
00927                 TIndexSet::const_iterator bestIt = leftIndex.end();
00928                 <font class="keywordflow">for</font> (TIndexSet::const_iterator it =  leftIndex.begin(); it != leftIndex.end(); ++it)
00929                 {       
00930                         <font class="keywordflow">if</font> (step == 0 &amp;&amp; *it == p1Index) <font class="keywordflow">continue</font>;
00931                         CVector2f seg1 = (<a class="code" href="classNLMISC_1_1CPolygon2D.html#m0">Vertices</a>[*it] - curr).normed();                                                       
00932                         <font class="keywordtype">float</font> n = seg1 * seg2;
00933                         <font class="keywordflow">if</font> (n &lt; bestCP)
00934                         {                               
00935                                 bestCP = n;
00936                                 bestIt = it;                            
00937                         }                       
00938                 }
00939 
00940                 <a class="code" href="debug_8h.html#a6">nlassert</a>(bestIt != leftIndex.end());            
00941                 <font class="keywordflow">if</font> (*bestIt == p1Index)
00942                 {                       
00943                         <font class="keywordflow">return</font>; <font class="comment">// if we reach the start point we have finished</font>
00944                 }                               
00945                 prev = curr;
00946                 curr = <a class="code" href="classNLMISC_1_1CPolygon2D.html#m0">Vertices</a>[*bestIt];
00947                 pPrev = pCurr;
00948                 pCurr = *bestIt;
00949                 <font class="comment">// add new point to the destination</font>
00950                 dest.Vertices.push_back(curr);
00951                 ++step;
00952                 leftIndex.erase(bestIt);
00953         }
00954 }
00955 
00956 <font class="comment">// ***************************************************************************</font>
00957 
00958 
<a name="l00959"></a><a class="code" href="classNLMISC_1_1CPolygon2D.html#a6">00959</a> <font class="keywordtype">void</font> CPolygon2D::serial(<a class="code" href="classNLMISC_1_1IStream.html">NLMISC::IStream</a> &amp;f) <font class="keywordflow">throw</font>(NLMISC::EStream)
00960 {
00961         (void)f.serialVersion(0);
00962         f.serialCont(Vertices);
00963 }
00964 
00965 <font class="comment">// ***************************************************************************</font>
<a name="l00967"></a><a class="code" href="classNLMISC_1_1CPolygon2D.html#a5">00967</a> <font class="comment">void            CPolygon2D::getBestTriplet(uint &amp;index0, uint &amp;index1, uint &amp;index2)</font>
00968 {
00969         <a class="code" href="debug_8h.html#a6">nlassert</a>(Vertices.size() &gt;= 3);
00970         uint i, j, k;
00971         <font class="keywordtype">float</font> bestArea = 0.f;
00972         <font class="keyword">const</font> uint numVerts = Vertices.size();
00973         <font class="keywordflow">for</font> (i = 0; i &lt; numVerts; ++i)
00974         {
00975                 <font class="keywordflow">for</font> (j = 0; j &lt; numVerts; ++j)
00976                 {
00977                         <font class="keywordflow">if</font> (i != j)
00978                         {
00979                                 <font class="keywordflow">for</font> (k = 0; k &lt; numVerts; ++k)
00980                                 {
00981                                         <font class="keywordflow">if</font> (k != i &amp;&amp; k != j)
00982                                         {
00983                                                 CVector2f v0 = Vertices[j] - Vertices[i];
00984                                                 CVector2f v1 = Vertices[k] - Vertices[i];                                               
00985                                                 <font class="keywordtype">float</font> area = fabsf((CVector(v0.x, v0.y, 0) ^ CVector(v1.x, v1.y, 0)).norm());
00986                                                 <font class="keywordflow">if</font> (area &gt; bestArea)
00987                                                 {
00988                                                         bestArea = area;
00989                                                         index0 = i;
00990                                                         index1 = j;
00991                                                         index2 = k;
00992                                                 }
00993                                         }
00994                                 }
00995                         }
00996                 }
00997         }
00998 }
00999 
01000 
01002 <font class="comment">// scan a an edge of a poly and write it into a table</font>
01003 <font class="keyword">static</font> <font class="keywordtype">void</font> <a class="code" href="namespaceNLMISC.html#a309">ScanEdge</a>(CPolygon2D::TRasterVect &amp;outputVect, sint topY, <font class="keyword">const</font> CVector2f &amp;v1, <font class="keyword">const</font> CVector2f &amp;v2, <font class="keywordtype">bool</font> rightEdge = <font class="keyword">true</font>)
01004 {
01005          <font class="keyword">const</font> uint rol16 = 65536;
01006          sint ceilY1 = (sint) ceilf(v1.y);
01007          sint <a class="code" href="driver__opengl__extension__def_8h.html#a390">height</a>;
01008          <font class="keywordtype">float</font> deltaX, deltaY;
01009          <font class="keywordtype">float</font> fInverseSlope;
01010          sint  iInverseSlope, iPosX;
01011 
01012          <font class="comment">// check wether this segment gives a contribution to the final poly</font>
01013          <a class="code" href="driver__opengl__extension__def_8h.html#a390">height</a> = (sint) (ceilf(v2.y) - ceilY1);
01014          <font class="keywordflow">if</font> (<a class="code" href="driver__opengl__extension__def_8h.html#a390">height</a> &lt;= 0) <font class="keywordflow">return</font>;
01015 
01016          <font class="comment">// compute slope</font>
01017          deltaY = v2.y - v1.y;
01018          deltaX = v2.x - v1.x;
01019          fInverseSlope = deltaX / deltaY;
01020 
01021          
01022          CPolygon2D::TRasterVect::iterator  outputIt = outputVect.begin() + (ceilY1 - topY);
01023 
01024          <font class="comment">// slope with ints</font>
01025          iInverseSlope = (sint) (rol16 * fInverseSlope);         
01026 
01027          <font class="comment">// sub-pixel accuracy</font>
01028          iPosX = (int) (rol16 * (v1.x + fInverseSlope * (ceilY1 - v1.y))); 
01029 
01030          <font class="keyword">const</font> CPolygon2D::TRasterVect::iterator endIt = outputIt + <a class="code" href="driver__opengl__extension__def_8h.html#a390">height</a>;
01031          <font class="keywordflow">if</font> (rightEdge)
01032          {              
01033                  <font class="keywordflow">do</font>
01034                  {
01035                    outputIt-&gt;second =  iPosX &gt;&gt; 16;     
01036                    iPosX += iInverseSlope;
01037                    ++outputIt;
01038                  }
01039                  <font class="keywordflow">while</font> (outputIt != endIt);
01040          }
01041          <font class="keywordflow">else</font>
01042          {      
01043                  iPosX += (rol16 - 1);
01044                  <font class="keywordflow">do</font>
01045                  {
01046                    outputIt-&gt;first =  iPosX &gt;&gt; 16;      
01047                    iPosX += iInverseSlope;
01048                    ++outputIt;
01049                  }
01050                  <font class="keywordflow">while</font> (outputIt != endIt);
01051          }
01052 }
01053 
01054 
01055 <font class="comment">// *******************************************************************************</font>
01056 <font class="comment">// This function alow to cycle forward through a vertex vector like if it was a circular list</font>
01057 <font class="keyword">static</font> <font class="keyword">inline</font> CPolygon2D::TVec2fVect::const_iterator <a class="code" href="namespaceNLMISC.html#a310">Next</a>(<font class="keyword">const</font> CPolygon2D::TVec2fVect::const_iterator &amp;it, <font class="keyword">const</font> CPolygon2D::TVec2fVect &amp;cont)
01058 {
01059         <a class="code" href="debug_8h.html#a6">nlassert</a>(cont.size() != 0);
01060         <font class="keywordflow">if</font> ((it + 1) == cont.end()) <font class="keywordflow">return</font> cont.begin();
01061         <font class="keywordflow">return</font> (it + 1);
01062 }
01063 
01064 
01065 <font class="comment">// *******************************************************************************</font>
01066 <font class="comment">// This function alow to cycle backward through a (non null) vertex vector like if it was a circular list</font>
01067 <font class="keyword">static</font> <font class="keyword">inline</font> CPolygon2D::TVec2fVect::const_iterator <a class="code" href="namespaceNLMISC.html#a311">Prev</a>(<font class="keyword">const</font> CPolygon2D::TVec2fVect::const_iterator &amp;it, <font class="keyword">const</font> CPolygon2D::TVec2fVect &amp;cont)
01068 {
01069         <a class="code" href="debug_8h.html#a6">nlassert</a>(cont.size() != 0);
01070         <font class="keywordflow">if</font> (it == cont.begin()) <font class="keywordflow">return</font> cont.end() - 1;
01071         <font class="keywordflow">return</font> (it - 1);
01072 }
01073 
01074 <font class="comment">// *******************************************************************************</font>
<a name="l01075"></a><a class="code" href="classNLMISC_1_1CPolygon2D.html#a7">01075</a> <font class="keywordtype">void</font>    CPolygon2D::computeBorders(TRasterVect &amp;borders, sint &amp;highestY)
01076 {
01077         <font class="comment">// an 'alias' to the vertices</font>
01078         <font class="keyword">const</font> <a class="code" href="classNLMISC_1_1CPolygon2D.html#s0">TVec2fVect</a> &amp;V = <a class="code" href="classNLMISC_1_1CPolygon2D.html#m0">Vertices</a>;
01079         <font class="keywordflow">if</font> (<a class="code" href="classNLMISC_1_1CPolygon2D.html#m0">Vertices</a>.size() &lt; 3)
01080         {
01081                 borders.clear();
01082                 <font class="keywordflow">return</font>;
01083         }
01084         <font class="keywordtype">bool</font>    ccw;  <font class="comment">// set to true when it has a counter clock wise orientation</font>
01085                    
01086         <font class="comment">// compute highest and lowest pos of the poly</font>
01087         <font class="keywordtype">float</font> fHighest = V[0].y;
01088         <font class="keywordtype">float</font> fLowest  = fHighest;
01089 
01090         <font class="comment">// iterators to the thighest and lowest vertex</font>
01091         TVec2fVect::const_iterator pLowest = V.begin(), pHighest = V.begin();
01092         TVec2fVect::const_iterator it = V.begin() ;
01093         <font class="keyword">const</font> TVec2fVect::const_iterator endIt = V.end();
01094         <font class="keywordflow">do</font>
01095         {
01096                 <font class="keywordflow">if</font> (it-&gt;y &gt; fLowest)
01097                 {
01098                         fLowest = it-&gt;y;
01099                         pLowest = it;
01100                 }
01101                 <font class="keywordflow">else</font>
01102                 <font class="keywordflow">if</font> (it-&gt;y &lt; fHighest)
01103                 {
01104                         fHighest = it-&gt;y;
01105                         pHighest = it;
01106                 }
01107                 ++it;
01108         }
01109         <font class="keywordflow">while</font> (it != endIt);
01110         
01111 
01112         sint iHighest = (sint) ceilf(fHighest) ;
01113         sint iLowest  = (sint) ceilf(fLowest) ;
01114 
01115         highestY = iHighest;
01116 
01117 
01119         uint polyHeight = iLowest - iHighest;
01120         <font class="keywordflow">if</font> (polyHeight &lt;= 0)
01121         {
01122                 borders.clear();
01123                 <font class="keywordflow">return</font>;
01124         }
01125 
01126         borders.resize(polyHeight);
01127 
01128         <font class="comment">// iterator to the first vertex that has an y different from the top vertex</font>
01129         TVec2fVect::const_iterator pHighestRight = pHighest; 
01130         <font class="comment">// we seek this vertex  </font>
01131         <font class="keywordflow">while</font> (<a class="code" href="namespaceNLMISC.html#a310">Next</a>(pHighestRight, V)-&gt;y == fHighest)
01132         {
01133                 pHighestRight = <a class="code" href="namespaceNLMISC.html#a310">Next</a>(pHighestRight, V);
01134         }       
01135 
01136         <font class="comment">// iterator to the first vertex after pHighestRight, that has the same y than the highest vertex</font>
01137         TVec2fVect::const_iterator pHighestLeft = <a class="code" href="namespaceNLMISC.html#a310">Next</a>(pHighestRight, V);
01138         <font class="comment">// seek the vertex</font>
01139         <font class="keywordflow">while</font> (pHighestLeft-&gt;y != fHighest)
01140         {
01141                 pHighestLeft = <a class="code" href="namespaceNLMISC.html#a310">Next</a>(pHighestLeft, V);
01142         }
01143 
01144         TVec2fVect::const_iterator pPrevHighestLeft = <a class="code" href="namespaceNLMISC.html#a311">Prev</a>(pHighestLeft, V);
01145   
01146         <font class="comment">// we need to get the orientation of the polygon</font>
01147         <font class="comment">// There are 2 case : flat, and non-flat top</font>
01148 
01149         <font class="comment">// check for flat top</font>
01150         <font class="keywordflow">if</font> (pHighestLeft-&gt;x != pHighestRight-&gt;x)
01151         {
01152                 <font class="comment">// compare right and left side</font>
01153                 <font class="keywordflow">if</font> (pHighestLeft-&gt;x&gt; pHighestRight-&gt;x)
01154                 {
01155                         ccw = <font class="keyword">true</font>;  <font class="comment">// the list is CCW oriented</font>
01156                         std::swap(pHighestLeft, pHighestRight);         
01157                 }
01158                 <font class="keywordflow">else</font>
01159                 {
01160                         ccw = <font class="keyword">false</font>; <font class="comment">// the list is CW oriented </font>
01161                 }
01162         }
01163         <font class="keywordflow">else</font>
01164         {
01165                 <font class="comment">// The top of the poly is sharp</font>
01166                 <font class="comment">// We perform a cross product of the 2 highest vect to get its orientation</font>
01167 
01168                  <font class="keyword">const</font> <font class="keywordtype">float</font> deltaXN = <a class="code" href="namespaceNLMISC.html#a310">Next</a>(pHighestRight, V)-&gt;x - pHighestRight-&gt;x;
01169                  <font class="keyword">const</font> <font class="keywordtype">float</font> deltaYN = <a class="code" href="namespaceNLMISC.html#a310">Next</a>(pHighestRight, V)-&gt;y - pHighestRight-&gt;y;
01170                  <font class="keyword">const</font> <font class="keywordtype">float</font> deltaXP = pPrevHighestLeft-&gt;x - pHighestLeft-&gt;x;
01171                  <font class="keyword">const</font> <font class="keywordtype">float</font> deltaYP = pPrevHighestLeft-&gt;y - pHighestLeft-&gt;y;
01172                  <font class="keywordflow">if</font> ((deltaXN * deltaYP - deltaYN * deltaXP) &lt; 0)
01173                  {
01174                         ccw = <font class="keyword">true</font>;  <font class="comment">// the list is CCW oriented</font>
01175                         std::swap(pHighestLeft, pHighestRight);                            
01176                  }
01177                  <font class="keywordflow">else</font>
01178                  {
01179                         ccw = <font class="keyword">false</font>; <font class="comment">// the list is CW oriented</font>
01180                  }
01181         }
01182 
01183 
01184         <font class="comment">// compute borders</font>
01185         TVec2fVect::const_iterator currV, nextV; <font class="comment">// current and next vertex</font>
01186         <font class="keywordflow">if</font> (!ccw) <font class="comment">// clock wise order ?</font>
01187         {
01188                 currV = pHighestRight ;
01189                 <font class="comment">// compute right edge from top to bottom</font>
01190                 <font class="keywordflow">do</font>
01191                 {
01192                         nextV = <a class="code" href="namespaceNLMISC.html#a310">Next</a>(currV, V);
01193                         <a class="code" href="namespaceNLMISC.html#a309">ScanEdge</a>(borders, iHighest, *currV, *nextV, <font class="keyword">true</font>);
01194             currV = nextV;            
01195                 }
01196                 <font class="keywordflow">while</font> (currV != pLowest); <font class="comment">// repeat until we reach the bottom vertex</font>
01197 
01198                 <font class="comment">// compute left edge from bottom to top</font>
01199                 <font class="keywordflow">do</font>
01200                 {
01201                         nextV = <a class="code" href="namespaceNLMISC.html#a310">Next</a>(currV, V);
01202                         <a class="code" href="namespaceNLMISC.html#a309">ScanEdge</a>(borders, iHighest, *nextV, *currV, <font class="keyword">false</font>);
01203                         currV = nextV;
01204                 }
01205                 <font class="keywordflow">while</font> (currV != pHighestLeft);
01206         }
01207         <font class="keywordflow">else</font> <font class="comment">// ccw order</font>
01208         {        
01209                 currV = pHighestLeft;
01210                 <font class="comment">// compute left edge from top to bottom</font>
01211                 <font class="keywordflow">do</font>
01212                 {
01213                         nextV = <a class="code" href="namespaceNLMISC.html#a310">Next</a>(currV, V);
01214                         <a class="code" href="namespaceNLMISC.html#a309">ScanEdge</a>(borders, iHighest, *currV, *nextV, <font class="keyword">false</font>) ;
01215                         currV = nextV;
01216                 }
01217                 <font class="keywordflow">while</font> (currV != pLowest) ;
01218 
01219                 <font class="comment">// compute right edge from bottom to top</font>
01220                 <font class="keywordflow">do</font>
01221                 {
01222                         nextV = <a class="code" href="namespaceNLMISC.html#a310">Next</a>(currV, V);
01223                         <a class="code" href="namespaceNLMISC.html#a309">ScanEdge</a>(borders, iHighest, *nextV, *currV, <font class="keyword">true</font>);
01224                         currV = nextV;
01225                 }
01226                 <font class="keywordflow">while</font> (currV != pHighestRight)  ;
01227         }
01228 }
01229 
01230 <font class="comment">// *******************************************************************************</font>
<a name="l01232"></a><a class="code" href="classNLMISC_1_1CPolygon2D.html#c0">01232</a> <font class="comment">float           CPolygon2D::sumDPAgainstLine(float a, float b, float c) const</font>
01233 {
01234         <font class="keywordtype">float</font> sum = 0.f;
01235         <font class="keywordflow">for</font> (uint k = 0; k &lt; Vertices.size(); ++k)
01236         {
01237                 <font class="keyword">const</font> CVector2f &amp;p = Vertices[k];
01238                 sum += a * p.x + b * p.y + c;
01239         }
01240         <font class="keywordflow">return</font> sum;
01241 }
01242 
01243 
01244 <font class="comment">// *******************************************************************************      </font>
<a name="l01245"></a><a class="code" href="classNLMISC_1_1CPolygon2D.html#a10">01245</a> <font class="keywordtype">bool</font>  CPolygon2D::getNonNullSeg(uint &amp;<a class="code" href="driver__opengl__extension__def_8h.html#a358">index</a>)<font class="keyword"> const</font>
01246 <font class="keyword"></font>{
01247         <a class="code" href="debug_8h.html#a6">nlassert</a>(<a class="code" href="classNLMISC_1_1CPolygon2D.html#m0">Vertices</a>.size() &gt; 0);
01248         <font class="keywordtype">float</font> bestLength = 0.f;
01249         sint  bestIndex = -1;
01250         <font class="keywordflow">for</font> (uint k = 0; k &lt; <a class="code" href="classNLMISC_1_1CPolygon2D.html#m0">Vertices</a>.size() - 1; ++k)
01251         {
01252                 <font class="keywordtype">float</font> norm2 = (<a class="code" href="classNLMISC_1_1CPolygon2D.html#m0">Vertices</a>[k + 1] - <a class="code" href="classNLMISC_1_1CPolygon2D.html#m0">Vertices</a>[k]).sqrnorm();
01253                 <font class="keywordflow">if</font> ( norm2 &gt; bestLength)
01254                 {
01255                         bestLength = norm2;
01256                         bestIndex = (int) k;
01257                 }
01258         }
01259         <font class="keywordtype">float</font> norm2 = (<a class="code" href="classNLMISC_1_1CPolygon2D.html#m0">Vertices</a>[<a class="code" href="classNLMISC_1_1CPolygon2D.html#m0">Vertices</a>.size() - 1] - <a class="code" href="classNLMISC_1_1CPolygon2D.html#m0">Vertices</a>[0]).sqrnorm();
01260         <font class="keywordflow">if</font> ( norm2 &gt; bestLength) 
01261         { 
01262                 <a class="code" href="driver__opengl__extension__def_8h.html#a358">index</a> = <a class="code" href="classNLMISC_1_1CPolygon2D.html#m0">Vertices</a>.size() - 1;
01263                 <font class="keywordflow">return</font> <font class="keyword">true</font>;
01264         }
01265 
01266         <font class="keywordflow">if</font> (bestIndex != -1)
01267         {
01268                 <a class="code" href="driver__opengl__extension__def_8h.html#a358">index</a> = bestIndex;
01269                 <font class="keywordflow">return</font> <font class="keyword">true</font>;
01270         }
01271         <font class="keywordflow">else</font>
01272         {
01273                 <font class="keywordflow">return</font> <font class="keyword">false</font>;
01274         }       
01275 }
01276 
01277 
01278 <font class="comment">// *******************************************************************************      </font>
<a name="l01279"></a><a class="code" href="classNLMISC_1_1CPolygon2D.html#a11">01279</a> <font class="keywordtype">void</font>  CPolygon2D::getLineEquation(uint <a class="code" href="driver__opengl__extension__def_8h.html#a358">index</a>, <font class="keywordtype">float</font> &amp;a, <font class="keywordtype">float</font> &amp;b, <font class="keywordtype">float</font> &amp;c)<font class="keyword"> const</font>
01280 <font class="keyword"></font>{
01281         <a class="code" href="debug_8h.html#a6">nlassert</a>(<a class="code" href="driver__opengl__extension__def_8h.html#a358">index</a> &lt; <a class="code" href="classNLMISC_1_1CPolygon2D.html#m0">Vertices</a>.size());
01282         <font class="keyword">const</font> CVector2f &amp;v0 = <a class="code" href="classNLMISC_1_1CPolygon2D.html#c1">getSegRef0</a>(<a class="code" href="driver__opengl__extension__def_8h.html#a358">index</a>);
01283         <font class="keyword">const</font> CVector2f &amp;v1 = <a class="code" href="classNLMISC_1_1CPolygon2D.html#c2">getSegRef1</a>(<a class="code" href="driver__opengl__extension__def_8h.html#a358">index</a>);
01284         
01285         <a class="code" href="classNLMISC_1_1CVector2f.html">NLMISC::CVector2f</a> seg = v0 - v1;
01286         a = seg.<a class="code" href="classNLMISC_1_1CVector2f.html#m1">y</a>;
01287         b = - seg.<a class="code" href="classNLMISC_1_1CVector2f.html#m0">x</a>;
01288         c = - v0.x * a - v0.y * b;
01289 }
01290 
01291 <font class="comment">// *******************************************************************************</font>
<a name="l01292"></a><a class="code" href="classNLMISC_1_1CPolygon2D.html#a8">01292</a> <font class="keywordtype">bool</font>        CPolygon2D::intersect(<font class="keyword">const</font> CPolygon2D &amp;other)<font class="keyword"> const</font>
01293 <font class="keyword"></font>{
01294         <a class="code" href="debug_8h.html#a6">nlassert</a>(other.Vertices.size() &gt; 0);
01295         uint nonNullSegIndex;
01297         <font class="keywordflow">if</font> (<a class="code" href="classNLMISC_1_1CPolygon2D.html#a10">getNonNullSeg</a>(nonNullSegIndex))
01298         {
01299                 <font class="keywordtype">float</font> a0, b0, c0; 
01300                 <a class="code" href="classNLMISC_1_1CPolygon2D.html#a11">getLineEquation</a>(nonNullSegIndex, a0, b0, c0);
01301                 <font class="keywordtype">float</font> orient = <a class="code" href="classNLMISC_1_1CPolygon2D.html#c0">sumDPAgainstLine</a>(a0, b0, c0);
01302 
01303                 <font class="keywordflow">for</font> (uint k = 0; k &lt; <a class="code" href="classNLMISC_1_1CPolygon2D.html#m0">Vertices</a>.size(); ++k)
01304                 {
01306                     <font class="keywordflow">if</font> ( (<a class="code" href="classNLMISC_1_1CPolygon2D.html#c1">getSegRef0</a>(k) - <a class="code" href="classNLMISC_1_1CPolygon2D.html#c2">getSegRef1</a>(k)).sqrnorm() == 0.f) <font class="keywordflow">continue</font>;
01307 
01309                         <font class="keywordtype">float</font> a, b, c; 
01310                         <a class="code" href="classNLMISC_1_1CPolygon2D.html#a11">getLineEquation</a>(k, a, b, c);
01311                         uint <a class="code" href="namespaceNLAISCRIPT.html#a20">l</a>;
01312                         <font class="keywordflow">for</font> (<a class="code" href="namespaceNLAISCRIPT.html#a20">l</a> = 0; <a class="code" href="namespaceNLAISCRIPT.html#a20">l</a> &lt; other.Vertices.size(); ++<a class="code" href="namespaceNLAISCRIPT.html#a20">l</a>)
01313                         {
01314                                 <font class="keyword">const</font> CVector2f &amp;ov = other.Vertices[<a class="code" href="namespaceNLAISCRIPT.html#a20">l</a>];
01315                                 <font class="keywordflow">if</font> ( orient * (ov.x * a + ov.y * b +c) &gt; 0.f) <font class="keywordflow">break</font>;
01316                         }
01317                         <font class="keywordflow">if</font> (<a class="code" href="namespaceNLAISCRIPT.html#a20">l</a> == other.Vertices.size()) <font class="comment">// all point on the outside</font>
01318                         {
01319                                 <font class="keywordflow">return</font> <font class="keyword">false</font>; <font class="comment">// outside</font>
01320                         }
01321                 }
01322                 <font class="keywordflow">return</font> <font class="keyword">true</font>;
01323         }
01324         <font class="keywordflow">else</font> <font class="comment">// this poly is just a point</font>
01325         {
01326                 <font class="keywordflow">return</font> other.contains(<a class="code" href="classNLMISC_1_1CPolygon2D.html#m0">Vertices</a>[0]);
01327         }
01328 }
01329 
01330 <font class="comment">// *******************************************************************************</font>
<a name="l01331"></a><a class="code" href="classNLMISC_1_1CPolygon2D.html#a9">01331</a> <font class="keywordtype">bool</font>            CPolygon2D::contains(<font class="keyword">const</font> CVector2f &amp;p)<font class="keyword"> const</font>
01332 <font class="keyword"></font>{
01333         <a class="code" href="debug_8h.html#a6">nlassert</a>(<a class="code" href="classNLMISC_1_1CPolygon2D.html#m0">Vertices</a>.size() &gt; 0);
01334         uint nonNullSegIndex;
01336         <font class="keywordflow">if</font> (<a class="code" href="classNLMISC_1_1CPolygon2D.html#a10">getNonNullSeg</a>(nonNullSegIndex))
01337         {
01338                 <font class="keywordtype">float</font> a0, b0, c0; 
01339                 <a class="code" href="classNLMISC_1_1CPolygon2D.html#a11">getLineEquation</a>(nonNullSegIndex, a0, b0, c0);
01340 
01341                 <font class="keywordflow">for</font> (uint k = 0; k &lt; <a class="code" href="classNLMISC_1_1CPolygon2D.html#m0">Vertices</a>.size(); ++k)
01342                 {
01344                     <font class="keywordflow">if</font> ( (<a class="code" href="classNLMISC_1_1CPolygon2D.html#c1">getSegRef0</a>(k) - <a class="code" href="classNLMISC_1_1CPolygon2D.html#c2">getSegRef1</a>(k)).sqrnorm() == 0.f) <font class="keywordflow">continue</font>;
01345 
01347                         <font class="keywordtype">float</font> a, b, c; 
01348                         <a class="code" href="classNLMISC_1_1CPolygon2D.html#a11">getLineEquation</a>(k, a, b, c);
01349 
01350                         <font class="keywordflow">if</font> (a * p.x + b * p.y + c &lt; 0) <font class="keywordflow">return</font> <font class="keyword">false</font>;
01351                         
01352                 }
01353                 <font class="keywordflow">return</font> <font class="keyword">true</font>;
01354         }
01355         <font class="keywordflow">else</font> <font class="comment">// this poly is just a point</font>
01356         {
01357                 <font class="keywordflow">return</font> p == <a class="code" href="classNLMISC_1_1CPolygon2D.html#m0">Vertices</a>[0];
01358         }               
01359 }
01360 
01361 
01362 <font class="comment">// *******************************************************************************</font>
<a name="l01363"></a><a class="code" href="classNLMISC_1_1CPolygon2D.html#a2">01363</a> CPolygon2D::CPolygon2D(<font class="keyword">const</font> CTriangle &amp;tri, <font class="keyword">const</font> CMatrix &amp;projMat)
01364 {
01365         <a class="code" href="classNLMISC_1_1CPolygon2D.html#m0">Vertices</a>.resize(3);
01366         <a class="code" href="classNLMISC_1_1CVector.html">NLMISC::CVector</a> proj[3] = { projMat * tri.V0, projMat * tri.V1, projMat * tri.V2 };
01367         <a class="code" href="classNLMISC_1_1CPolygon2D.html#m0">Vertices</a>[0].set(proj[0].<a class="code" href="driver__opengl__extension__def_8h.html#a364">x</a>, proj[0].<a class="code" href="driver__opengl__extension__def_8h.html#a365">y</a>);
01368         <a class="code" href="classNLMISC_1_1CPolygon2D.html#m0">Vertices</a>[1].set(proj[1].<a class="code" href="driver__opengl__extension__def_8h.html#a364">x</a>, proj[1].<a class="code" href="driver__opengl__extension__def_8h.html#a365">y</a>);
01369         <a class="code" href="classNLMISC_1_1CPolygon2D.html#m0">Vertices</a>[2].set(proj[2].<a class="code" href="driver__opengl__extension__def_8h.html#a364">x</a>, proj[2].<a class="code" href="driver__opengl__extension__def_8h.html#a365">y</a>);
01370 }
01371 
01372 } <font class="comment">// NLMISC</font>
</pre></div>

<!-- footer -->
<BR><FONT Size=+5>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; </FONT>
</TD>
<TD WIDTH=15><IMG  SRC=http://www.nevrax.org/inc/img/pixel.gif WIDTH=15 HEIGHT=15 BORDER=0 ALT=""></TD>
</TR>
</TABLE>
</BODY>
</HTML>