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source: GTP/trunk/Lib/Vis/Preprocessing/src/X3dParser.cpp @ 658

Revision 658, 19.7 KB checked in by mattausch, 19 years ago (diff)
added switch for loading polys as meshes

Line
1	// ---------------------------------------------------------------------------
2	// Includes for all the program files to see
3	// ---------------------------------------------------------------------------
4	#include <string.h>
5	#include <stdlib.h>
6	#include <iostream>
7	using namespace std;
8	#include <xercesc/util/PlatformUtils.hpp>
9
10	// ---------------------------------------------------------------------------
11	// Includes
12	// ---------------------------------------------------------------------------
13	#include <xercesc/framework/StdInInputSource.hpp>
14	#include <xercesc/parsers/SAXParser.hpp>
15	#include <xercesc/util/OutOfMemoryException.hpp>
16
17	// ---------------------------------------------------------------------------
18	// Includes
19	// ---------------------------------------------------------------------------
20	#include <xercesc/sax/AttributeList.hpp>
21	#include <xercesc/sax/SAXParseException.hpp>
22	#include <xercesc/sax/SAXException.hpp>
23
24	#include "X3dParser.h"
25
26	#include "X3dParserXerces.h"
27	#include "Mesh.h"
28	#include "SceneGraph.h"
29	#include "Triangle3.h"
30	#include "ViewCellsManager.h"
31
32	// ---------------------------------------------------------------------------
33	// Local data
34	//
35	// doNamespaces
36	// Indicates whether namespace processing should be enabled or not.
37	// The default is no, but -n overrides that.
38	//
39	// doSchema
40	// Indicates whether schema processing should be enabled or not.
41	// The default is no, but -s overrides that.
42	//
43	// schemaFullChecking
44	// Indicates whether full schema constraint checking should be enabled or not.
45	// The default is no, but -s overrides that.
46	//
47	// valScheme
48	// Indicates what validation scheme to use. It defaults to 'auto', but
49	// can be set via the -v= command.
50	// ---------------------------------------------------------------------------
51	static bool doNamespaces = false;
52	static bool doSchema = false;
53	static bool schemaFullChecking = false;
54	static SAXParser::ValSchemes valScheme = SAXParser::Val_Auto;
55
56
57
58
59
60	// ---------------------------------------------------------------------------
61	// StdInParseHandlers: Constructors and Destructor
62	// ---------------------------------------------------------------------------
63	X3dParseHandlers::X3dParseHandlers(SceneGraphNode *root, const bool loadPolygonsAsMeshes):
64	mElementCount(0)
65	, mAttrCount(0)
66	, mCharacterCount(0)
67	, mSpaceCount(0)
68	, mLoadPolygonsAsMeshes(loadPolygonsAsMeshes)
69	{
70	mCurrentNode = root;
71	}
72
73	X3dParseHandlers::~X3dParseHandlers()
74	{
75	}
76
77
78	// ---------------------------------------------------------------------------
79	// StdInParseHandlers: Implementation of the SAX DocumentHandler interface
80	// ---------------------------------------------------------------------------
81	void X3dParseHandlers::endElement(const XMLCh* const name)
82	{
83	StrX lname(name);
84	string element(lname.LocalForm());
85	if (element == "Shape")
86	EndShape();
87	}
88
89	void
90	X3dParseHandlers::EndShape()
91	{
92	if (mLoadPolygonsAsMeshes)
93	{
94	vector<VertexIndexContainer>::const_iterator it, it_end = mCurrentVertexIndices.end();
95
96	for (it = mCurrentVertexIndices.begin(); it != it_end; ++ it)
97	{
98	// only one face per mesh
99	Mesh *mesh = new Mesh();
100
101	// add vertices
102	for (int i = 0; i < (int)(*it).size(); ++ i)
103	{
104	mesh->mVertices.push_back(mCurrentVertices[(*it)[i]]);
105
106	}
107
108	mesh->mFaces.push_back(new Face(0,1,2));
109	mesh->Preprocess();
110	// make an instance of this mesh
111	MeshInstance *mi = new MeshInstance(mesh);
112	mCurrentNode->mGeometry.push_back(mi);
113
114	}
115
116	delete mCurrentMesh;
117	mCurrentVertices.clear();
118	mCurrentVertexIndices.clear();
119	}
120	else
121	{
122
123	if (mCurrentMesh->mFaces.size())
124	{
125	mCurrentMesh->Preprocess();
126	// make an instance of this mesh
127	MeshInstance *mi = new MeshInstance(mCurrentMesh);
128	mCurrentNode->mGeometry.push_back(mi);
129	// set the object id to a unique value
130	//mi->SetId(mCurrentObjectId ++);
131	}
132	else
133	{
134	cout<<"X";
135	delete mCurrentMesh;
136	}
137	mCurrentMesh = NULL;
138	}
139	}
140	void
141	X3dParseHandlers::StartIndexedFaceSet(
142	AttributeList& attributes)
143	{
144	int len = attributes.getLength();
145	int i;
146	VertexIndexContainer vertices;
147
148	for (i=0; i < len; i++) {
149	string attrName(StrX(attributes.getName(i)).LocalForm());
150	if (attrName == "coordIndex") {
151	StrX attrValue(attributes.getValue(i));
152	// handle coordIndex
153	vertices.clear();
154	const char *ptr = attrValue.LocalForm();
155	char *endptr;
156	while(1) {
157	int index = strtol(ptr, &endptr, 10);
158	if (ptr == endptr \|\| index == -1) {
159	if (vertices.size() > 2) {
160	Face *face = new Face(vertices);
161
162	if (!mLoadPolygonsAsMeshes)
163	{
164	mCurrentMesh->mFaces.push_back(face);
165	}
166	else
167	// every polygon is a mesh
168	{
169	mCurrentVertexIndices.push_back(vertices);
170	}
171	}
172
173	vertices.clear();
174	if (ptr == endptr)
175	break;
176	} else {
177	vertices.push_back(index);
178	}
179	ptr = endptr;
180	}
181	}
182	}
183	}
184
185	void
186	X3dParseHandlers::StartMaterial(
187	AttributeList& attributes)
188	{
189	int len = attributes.getLength();
190	int i;
191	if (!mCurrentMesh->mMaterial)
192	mCurrentMesh->mMaterial = new Material;
193	for (i=0; i < len; i++) {
194	string attrName(StrX(attributes.getName(i)).LocalForm());
195	StrX attrValue(attributes.getValue(i));
196	const char *ptr = attrValue.LocalForm();
197	if (attrName == "diffuseColor") {
198	float r, g, b;
199	if (sscanf(ptr, "%f %f %f", &r, &g, &b) == 3)
200	mCurrentMesh->mMaterial->mDiffuseColor = RgbColor(r, g, b);
201	}
202	}
203	}
204
205	void
206	X3dParseHandlers::StartCoordinate(
207	AttributeList& attributes)
208	{
209	int len = attributes.getLength();
210
211	int i;
212	VertexContainer vertices;
213
214	for (i=0; i < len; i++)
215	{
216	string attrName(StrX(attributes.getName(i)).LocalForm());
217
218	if (attrName == "point")
219	{
220	StrX attrValue(attributes.getValue(i));
221
222
223	const char *ptr = attrValue.LocalForm();
224	char *endptr;
225
226
227	while(1)
228	{
229	float x = (float)strtod(ptr, &endptr);
230
231	if (ptr == endptr)
232	break;
233
234	ptr = endptr;
235
236	float y = (float)strtod(ptr, &endptr);
237
238	if (ptr == endptr)
239	break;
240
241	ptr = endptr;
242
243	float z = (float)strtod(ptr, &endptr);
244	if (ptr == endptr)
245	break;
246
247	ptr = endptr;
248
249	if (*ptr == ',')
250	ptr ++;
251
252	Vector3 v(x, y, z);
253	vertices.push_back(v);
254	}
255	if (mLoadPolygonsAsMeshes)
256	{
257	mCurrentVertices = vertices;
258	}
259	else
260	{
261	mCurrentMesh->mVertices = vertices;
262	}
263	}
264	}
265	}
266
267
268	void
269	X3dParseHandlers::startElement(const XMLCh* const name,
270	AttributeList& attributes)
271	{
272	StrX lname(name);
273	string element(lname.LocalForm());
274
275	if (element == "IndexedFaceSet") {
276	// create a new mesh node in the scene graph
277	StartIndexedFaceSet(attributes);
278	}
279
280	if (element == "Shape") {
281	cout<<"+";
282	mCurrentMesh = new Mesh;
283	}
284
285	if (element == "Coordinate") {
286	if (mCurrentMesh)
287	StartCoordinate(attributes);
288	}
289
290	if (element == "Material") {
291	StartMaterial(attributes);
292	}
293
294	mElementCount++;
295	mAttrCount += attributes.getLength();
296	}
297
298	void
299	X3dParseHandlers::characters(const XMLCh* const chars,
300	const unsigned int length)
301	{
302	mCharacterCount += length;
303	}
304
305	void
306	X3dParseHandlers::ignorableWhitespace(const XMLCh* const chars,
307	const unsigned int length)
308	{
309	mSpaceCount += length;
310	}
311
312	void
313	X3dParseHandlers::resetDocument()
314	{
315	mAttrCount = 0;
316	mCharacterCount = 0;
317	mElementCount = 0;
318	mSpaceCount = 0;
319	}
320
321
322
323	// ---------------------------------------------------------------------------
324	// StdInParseHandlers: Overrides of the SAX ErrorHandler interface
325	// ---------------------------------------------------------------------------
326	void
327	X3dParseHandlers::error(const SAXParseException& e)
328	{
329	XERCES_STD_QUALIFIER cerr << "\nError at (file " << StrX(e.getSystemId())
330	<< ", line " << e.getLineNumber()
331	<< ", char " << e.getColumnNumber()
332	<< "): " << StrX(e.getMessage()) << XERCES_STD_QUALIFIER endl;
333	}
334
335	void
336	X3dParseHandlers::fatalError(const SAXParseException& e)
337	{
338	XERCES_STD_QUALIFIER cerr << "\nFatal Error at (file " << StrX(e.getSystemId())
339	<< ", line " << e.getLineNumber()
340	<< ", char " << e.getColumnNumber()
341	<< "): " << StrX(e.getMessage()) << XERCES_STD_QUALIFIER endl;
342	}
343
344	void
345	X3dParseHandlers::warning(const SAXParseException& e)
346	{
347	XERCES_STD_QUALIFIER cerr << "\nWarning at (file " << StrX(e.getSystemId())
348	<< ", line " << e.getLineNumber()
349	<< ", char " << e.getColumnNumber()
350	<< "): " << StrX(e.getMessage()) << XERCES_STD_QUALIFIER endl;
351	}
352
353
354	bool
355	X3dParser::ParseFile(const string filename,
356	SceneGraphNode **root,
357	const bool loadPolygonsAsMeshes)
358	{
359	// Initialize the XML4C system
360	try {
361	XMLPlatformUtils::Initialize();
362	}
363
364	catch (const XMLException& toCatch)
365	{
366	XERCES_STD_QUALIFIER cerr << "Error during initialization! Message:\n"
367	<< StrX(toCatch.getMessage()) << XERCES_STD_QUALIFIER endl;
368	return false;
369	}
370
371
372	//
373	// Create a SAX parser object. Then, according to what we were told on
374	// the command line, set the options.
375	//
376	SAXParser* parser = new SAXParser;
377	parser->setValidationScheme(valScheme);
378	parser->setDoNamespaces(doNamespaces);
379	parser->setDoSchema(doSchema);
380	parser->setValidationSchemaFullChecking(schemaFullChecking);
381
382
383	//
384	// Create our SAX handler object and install it on the parser, as the
385	// document and error handler. We are responsible for cleaning them
386	// up, but since its just stack based here, there's nothing special
387	// to do.
388	//
389	*root = new SceneGraphNode;
390	X3dParseHandlers handler(*root, loadPolygonsAsMeshes);
391	parser->setDocumentHandler(&handler);
392	parser->setErrorHandler(&handler);
393
394	unsigned long duration;
395	int errorCount = 0;
396	// create a faux scope so that 'src' destructor is called before
397	// XMLPlatformUtils::Terminate
398	{
399	//
400	// Kick off the parse and catch any exceptions. Create a standard
401	// input input source and tell the parser to parse from that.
402	//
403	// StdInInputSource src;
404	try
405	{
406	const unsigned long startMillis = XMLPlatformUtils::getCurrentMillis();
407	parser->parse(filename.c_str());
408	const unsigned long endMillis = XMLPlatformUtils::getCurrentMillis();
409	duration = endMillis - startMillis;
410	errorCount = parser->getErrorCount();
411	}
412	catch (const OutOfMemoryException&)
413	{
414	XERCES_STD_QUALIFIER cerr << "OutOfMemoryException" << XERCES_STD_QUALIFIER endl;
415	errorCount = 2;
416	return false;
417	}
418	catch (const XMLException& e)
419	{
420	XERCES_STD_QUALIFIER cerr << "\nError during parsing: \n"
421	<< StrX(e.getMessage())
422	<< "\n" << XERCES_STD_QUALIFIER endl;
423	errorCount = 1;
424	return false;
425	}
426
427
428	// Print out the stats that we collected and time taken
429	if (!errorCount) {
430	XERCES_STD_QUALIFIER cout << filename << ": " << duration << " ms ("
431	<< handler.GetElementCount() << " elems, "
432	<< handler.GetAttrCount() << " attrs, "
433	<< handler.GetSpaceCount() << " spaces, "
434	<< handler.GetCharacterCount() << " chars)" << XERCES_STD_QUALIFIER endl;
435	}
436	}
437
438	//
439	// Delete the parser itself. Must be done prior to calling Terminate, below.
440	//
441	delete parser;
442
443	XMLPlatformUtils::Terminate();
444
445	if (errorCount > 0)
446	return false;
447	else
448	return true;
449	}
450
451
452
453	/************************************************************************/
454	/* class X3dViewCellsParseHandlers implementation */
455	/************************************************************************/
456
457
458	// ---------------------------------------------------------------------------
459	// StdInParseHandlers: Constructors and Destructor
460	// ---------------------------------------------------------------------------
461	X3dViewCellsParseHandlers::X3dViewCellsParseHandlers(ViewCellsManager *viewCellsManager,
462	const float viewCellHeight):
463	mElementCount(0),
464	mAttrCount(0),
465	mCharacterCount(0),
466	mSpaceCount(0),
467	mViewCellsManager(viewCellsManager),
468	mViewCellHeight(viewCellHeight)
469	{
470	}
471
472	X3dViewCellsParseHandlers::~X3dViewCellsParseHandlers()
473	{
474	}
475
476
477	// ---------------------------------------------------------------------------
478	// StdInParseHandlers: Implementation of the SAX DocumentHandler interface
479	// ---------------------------------------------------------------------------
480	void X3dViewCellsParseHandlers::endElement(const XMLCh* const name)
481	{
482	StrX lname(name);
483	string element(lname.LocalForm());
484	if (element == "Shape")
485	EndShape();
486	}
487
488	void
489	X3dViewCellsParseHandlers::EndShape()
490	{
491	}
492
493	void
494	X3dViewCellsParseHandlers::StartIndexedFaceSet(
495	AttributeList& attributes)
496	{
497	int len = attributes.getLength();
498	int i;
499	// clear previous vertex indices
500	mCurrentVertexIndices.clear();
501	for (i=0; i < len; i++)
502	{
503	string attrName(StrX(attributes.getName(i)).LocalForm());
504
505	if (attrName == "coordIndex")
506	{
507	StrX attrValue(attributes.getValue(i));
508
509	// handle coordIndex
510	const char *ptr = attrValue.LocalForm();
511	char *endptr;
512
513	while (1)
514	{
515	int index = strtol(ptr, &endptr, 10);
516
517	if (ptr == endptr)
518	break;
519
520	if (index != -1)
521	{
522	mCurrentVertexIndices.push_back(index);
523	}
524
525	ptr = endptr;
526	}
527	}
528	}
529	}
530
531
532	void
533	X3dViewCellsParseHandlers::StartCoordinate(AttributeList& attributes)
534	{
535	int len = attributes.getLength();
536
537	VertexContainer vertices;
538	int i;
539	for (i=0; i < len; i++)
540	{
541	string attrName(StrX(attributes.getName(i)).LocalForm());
542
543	if (attrName == "point")
544	{
545	StrX attrValue(attributes.getValue(i));
546
547	const char *ptr = attrValue.LocalForm();
548
549	char *endptr;
550
551	while (1)
552	{
553	float x = (float)strtod(ptr, &endptr);
554
555	if (ptr == endptr)
556	break;
557	ptr = endptr;
558
559	float y = (float)(float)strtod(ptr, &endptr);
560
561
562	if (ptr == endptr)
563	break;
564	ptr = endptr;
565
566	float z = (float)(float)strtod(ptr, &endptr);
567
568	if (ptr == endptr)
569	break;
570
571	ptr = endptr;
572	if (*ptr == ',')
573	ptr++;
574
575	Vector3 v(x, y, z);
576	vertices.push_back(v);
577	}
578	}
579	}
580
581	for (i = 0; i < mCurrentVertexIndices.size(); i += 3)
582	{
583	Triangle3 baseTri(vertices[mCurrentVertexIndices[i + 0]],
584	vertices[mCurrentVertexIndices[i + 1]],
585	vertices[mCurrentVertexIndices[i + 2]]);
586
587	// create view cell from base triangle
588	mViewCellsManager->AddViewCell(
589	mViewCellsManager->ExtrudeViewCell(baseTri,
590	mViewCellHeight));
591	}
592	}
593
594
595	void
596	X3dViewCellsParseHandlers::startElement(const XMLCh* const name,
597	AttributeList& attributes)
598	{
599	StrX lname(name);
600	string element(lname.LocalForm());
601
602	if (element == "IndexedFaceSet") {
603	// create the viewcells from individual triangles
604	StartIndexedFaceSet(attributes);
605	}
606
607	if (element == "Coordinate") {
608	// add coordinates to the triangles
609	StartCoordinate(attributes);
610	}
611	// do nothing
612	//if (element == "Shape") {}
613	// ignore material
614	//if (element == "Material") {}
615
616	++ mElementCount;
617	mAttrCount += attributes.getLength();
618	}
619
620	void
621	X3dViewCellsParseHandlers::characters(const XMLCh* const chars,
622	const unsigned int length)
623	{
624	mCharacterCount += length;
625	}
626
627	void
628	X3dViewCellsParseHandlers::ignorableWhitespace(const XMLCh* const chars,
629	const unsigned int length)
630	{
631	mSpaceCount += length;
632	}
633
634	void
635	X3dViewCellsParseHandlers::resetDocument()
636	{
637	mAttrCount = 0;
638	mCharacterCount = 0;
639	mElementCount = 0;
640	mSpaceCount = 0;
641	}
642
643
644
645	// ---------------------------------------------------------------------------
646	// StdInParseHandlers: Overrides of the SAX ErrorHandler interface
647	// ---------------------------------------------------------------------------
648	void
649	X3dViewCellsParseHandlers::error(const SAXParseException& e)
650	{
651	XERCES_STD_QUALIFIER cerr << "\nError at (file " << StrX(e.getSystemId())
652	<< ", line " << e.getLineNumber()
653	<< ", char " << e.getColumnNumber()
654	<< "): " << StrX(e.getMessage()) << XERCES_STD_QUALIFIER endl;
655	}
656
657	void
658	X3dViewCellsParseHandlers::fatalError(const SAXParseException& e)
659	{
660	XERCES_STD_QUALIFIER cerr << "\nFatal Error at (file " << StrX(e.getSystemId())
661	<< ", line " << e.getLineNumber()
662	<< ", char " << e.getColumnNumber()
663	<< "): " << StrX(e.getMessage()) << XERCES_STD_QUALIFIER endl;
664	}
665
666	void
667	X3dViewCellsParseHandlers::warning(const SAXParseException& e)
668	{
669	XERCES_STD_QUALIFIER cerr << "\nWarning at (file " << StrX(e.getSystemId())
670	<< ", line " << e.getLineNumber()
671	<< ", char " << e.getColumnNumber()
672	<< "): " << StrX(e.getMessage()) << XERCES_STD_QUALIFIER endl;
673	}
674
675
676	bool
677	X3dParser::ParseFile(const string filename, ViewCellsManager &viewCells)
678	{
679	// Initialize the XML4C system
680	try {
681	XMLPlatformUtils::Initialize();
682	}
683
684	catch (const XMLException& toCatch)
685	{
686	XERCES_STD_QUALIFIER cerr << "Error during initialization! Message:\n"
687	<< StrX(toCatch.getMessage()) << XERCES_STD_QUALIFIER endl;
688	return false;
689	}
690
691
692	//
693	// Create a SAX parser object. Then, according to what we were told on
694	// the command line, set the options.
695	//
696	SAXParser* parser = new SAXParser;
697	parser->setValidationScheme(valScheme);
698	parser->setDoNamespaces(doNamespaces);
699	parser->setDoSchema(doSchema);
700	parser->setValidationSchemaFullChecking(schemaFullChecking);
701
702
703	//
704	// Create our SAX handler object and install it on the parser, as the
705	// document and error handler. We are responsible for cleaning them
706	// up, but since its just stack based here, there's nothing special
707	// to do.
708	//
709	X3dViewCellsParseHandlers handler(&viewCells, mViewCellHeight);
710	parser->setDocumentHandler(&handler);
711	parser->setErrorHandler(&handler);
712
713	unsigned long duration;
714	int errorCount = 0;
715	// create a faux scope so that 'src' destructor is called before
716	// XMLPlatformUtils::Terminate
717	{
718	//
719	// Kick off the parse and catch any exceptions. Create a standard
720	// input input source and tell the parser to parse from that.
721	//
722	// StdInInputSource src;
723	try
724	{
725	const unsigned long startMillis = XMLPlatformUtils::getCurrentMillis();
726	parser->parse(filename.c_str());
727	const unsigned long endMillis = XMLPlatformUtils::getCurrentMillis();
728	duration = endMillis - startMillis;
729	errorCount = parser->getErrorCount();
730	}
731	catch (const OutOfMemoryException&)
732	{
733	XERCES_STD_QUALIFIER cerr << "OutOfMemoryException" << XERCES_STD_QUALIFIER endl;
734	errorCount = 2;
735	return false;
736	}
737	catch (const XMLException& e)
738	{
739	XERCES_STD_QUALIFIER cerr << "\nError during parsing: \n"
740	<< StrX(e.getMessage())
741	<< "\n" << XERCES_STD_QUALIFIER endl;
742	errorCount = 1;
743	return false;
744	}
745
746
747	// Print out the stats that we collected and time taken
748	if (!errorCount) {
749	XERCES_STD_QUALIFIER cout << filename << ": " << duration << " ms ("
750	<< handler.GetElementCount() << " elems, "
751	<< handler.GetAttrCount() << " attrs, "
752	<< handler.GetSpaceCount() << " spaces, "
753	<< handler.GetCharacterCount() << " chars)" << XERCES_STD_QUALIFIER endl;
754	}
755	}
756
757	//
758	// Delete the parser itself. Must be done prior to calling Terminate, below.
759	//
760	delete parser;
761
762	XMLPlatformUtils::Terminate();
763
764	if (errorCount > 0)
765	return false;
766	else
767	return true;
768	}

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