vrshoot: 334d17aed7de libs/assimp/FBXParser.cpp

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view libs/assimp/FBXParser.cpp @ 2:334d17aed7de

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author	John Tsiombikas <nuclear@member.fsf.org>
date	Sun, 02 Feb 2014 18:36:38 +0200
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1 /*

2 Open Asset Import Library (assimp)

3 ----------------------------------------------------------------------

8 Redistribution and use of this software in source and binary forms,

9 with or without modification, are permitted provided that the

10 following conditions are met:

12 * Redistributions of source code must retain the above

13 copyright notice, this list of conditions and the

14 following disclaimer.

16 * Redistributions in binary form must reproduce the above

17 copyright notice, this list of conditions and the

18 following disclaimer in the documentation and/or other

19 materials provided with the distribution.

21 * Neither the name of the assimp team, nor the names of its

22 contributors may be used to endorse or promote products

23 derived from this software without specific prior

24 written permission of the assimp team.

26 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

27 "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

28 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

29 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT

30 OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

31 SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

32 LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

33 DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

34 THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

35 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

36 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

38 ----------------------------------------------------------------------

39 */

41 /** @file FBXParser.cpp

42 * @brief Implementation of the FBX parser and the rudimentary DOM that we use

43 */

44 #include "AssimpPCH.h"

46 #ifndef ASSIMP_BUILD_NO_FBX_IMPORTER

49 #ifdef ASSIMP_BUILD_NO_OWN_ZLIB

50 # include <zlib.h>

51 #else

52 # include "../contrib/zlib/zlib.h"

53 #endif

56 #include "FBXTokenizer.h"

57 #include "FBXParser.h"

58 #include "FBXUtil.h"

60 #include "ParsingUtils.h"

61 #include "fast_atof.h"

63 using namespace Assimp;

64 using namespace Assimp::FBX;

66 namespace {

69 // ------------------------------------------------------------------------------------------------

70 // signal parse error, this is always unrecoverable. Throws DeadlyImportError.

71 void ParseError(const std::string& message, const Token& token)

72 {

73 throw DeadlyImportError(Util::AddTokenText("FBX-Parser",message,&token));

74 }

76 // ------------------------------------------------------------------------------------------------

77 void ParseError(const std::string& message, const Element* element = NULL)

78 {

79 if(element) {

80 ParseError(message,element->KeyToken());

81 }

82 throw DeadlyImportError("FBX-Parser " + message);

83 }

86 // ------------------------------------------------------------------------------------------------

87 // print warning, do return

88 void ParseWarning(const std::string& message, const Token& token)

89 {

90 if(DefaultLogger::get()) {

91 DefaultLogger::get()->warn(Util::AddTokenText("FBX-Parser",message,&token));

92 }

93 }

95 // ------------------------------------------------------------------------------------------------

96 void ParseWarning(const std::string& message, const Element* element = NULL)

97 {

98 if(element) {

99 ParseWarning(message,element->KeyToken());

100 return;

101 }

102 if(DefaultLogger::get()) {

103 DefaultLogger::get()->warn("FBX-Parser: " + message);

104 }

105 }

106

107 // ------------------------------------------------------------------------------------------------

108 void ParseError(const std::string& message, TokenPtr token)

109 {

110 if(token) {

111 ParseError(message, *token);

112 }

113 ParseError(message);

114 }

115

116 }

117

118 namespace Assimp {

119 namespace FBX {

120

121 // ------------------------------------------------------------------------------------------------

122 Element::Element(const Token& key_token, Parser& parser)

123 : key_token(key_token)

124 {

125 TokenPtr n = NULL;

126 do {

127 n = parser.AdvanceToNextToken();

128 if(!n) {

129 ParseError("unexpected end of file, expected closing bracket",parser.LastToken());

130 }

131

132 if (n->Type() == TokenType_DATA) {

133 tokens.push_back(n);

134

135 n = parser.AdvanceToNextToken();

136 if(!n) {

137 ParseError("unexpected end of file, expected bracket, comma or key",parser.LastToken());

138 }

139

140 const TokenType ty = n->Type();

141 if (ty != TokenType_OPEN_BRACKET && ty != TokenType_CLOSE_BRACKET && ty != TokenType_COMMA && ty != TokenType_KEY) {

142 ParseError("unexpected token; expected bracket, comma or key",n);

143 }

144 }

145

146 if (n->Type() == TokenType_OPEN_BRACKET) {

147 compound.reset(new Scope(parser));

148

149 // current token should be a TOK_CLOSE_BRACKET

150 n = parser.CurrentToken();

151 ai_assert(n);

152

153 if (n->Type() != TokenType_CLOSE_BRACKET) {

154 ParseError("expected closing bracket",n);

155 }

156

157 parser.AdvanceToNextToken();

158 return;

159 }

160 }

161 while(n->Type() != TokenType_KEY && n->Type() != TokenType_CLOSE_BRACKET);

162 }

163

164 // ------------------------------------------------------------------------------------------------

165 Element::~Element()

166 {

167 // no need to delete tokens, they are owned by the parser

168 }

169

170 // ------------------------------------------------------------------------------------------------

171 Scope::Scope(Parser& parser,bool topLevel)

172 {

173 if(!topLevel) {

174 TokenPtr t = parser.CurrentToken();

175 if (t->Type() != TokenType_OPEN_BRACKET) {

176 ParseError("expected open bracket",t);

177 }

178 }

179

180 TokenPtr n = parser.AdvanceToNextToken();

181 if(n == NULL) {

182 ParseError("unexpected end of file");

183 }

184

185 // note: empty scopes are allowed

186 while(n->Type() != TokenType_CLOSE_BRACKET) {

187 if (n->Type() != TokenType_KEY) {

188 ParseError("unexpected token, expected TOK_KEY",n);

189 }

190

191 const std::string& str = n->StringContents();

192 elements.insert(ElementMap::value_type(str,new_Element(*n,parser)));

193

194 // Element() should stop at the next Key token (or right after a Close token)

195 n = parser.CurrentToken();

196 if(n == NULL) {

197 if (topLevel) {

198 return;

199 }

200 ParseError("unexpected end of file",parser.LastToken());

201 }

202 }

203 }

204

205 // ------------------------------------------------------------------------------------------------

206 Scope::~Scope()

207 {

208 BOOST_FOREACH(ElementMap::value_type& v, elements) {

209 delete v.second;

210 }

211 }

212

213

214 // ------------------------------------------------------------------------------------------------

215 Parser::Parser (const TokenList& tokens, bool is_binary)

216 : tokens(tokens)

217 , last()

218 , current()

219 , cursor(tokens.begin())

220 , is_binary(is_binary)

221 {

222 root.reset(new Scope(*this,true));

223 }

224

225

226 // ------------------------------------------------------------------------------------------------

227 Parser::~Parser()

228 {

229 }

230

231

232 // ------------------------------------------------------------------------------------------------

233 TokenPtr Parser::AdvanceToNextToken()

234 {

235 last = current;

236 if (cursor == tokens.end()) {

237 current = NULL;

238 }

239 else {

240 current = *cursor++;

241 }

242 return current;

243 }

244

245

246 // ------------------------------------------------------------------------------------------------

247 TokenPtr Parser::CurrentToken() const

248 {

249 return current;

250 }

251

252

253 // ------------------------------------------------------------------------------------------------

254 TokenPtr Parser::LastToken() const

255 {

256 return last;

257 }

258

259

260 // ------------------------------------------------------------------------------------------------

261 uint64_t ParseTokenAsID(const Token& t, const char*& err_out)

262 {

263 err_out = NULL;

264

265 if (t.Type() != TokenType_DATA) {

266 err_out = "expected TOK_DATA token";

267 return 0L;

268 }

269

270 if(t.IsBinary())

271 {

272 const char* data = t.begin();

273 if (data[0] != 'L') {

274 err_out = "failed to parse ID, unexpected data type, expected L(ong) (binary)";

275 return 0L;

276 }

277

278 ai_assert(t.end() - data == 9);

279

280 BE_NCONST uint64_t id = *reinterpret_cast<const uint64_t*>(data+1);

281 AI_SWAP8(id);

282 return id;

283 }

284

285 // XXX: should use size_t here

286 unsigned int length = static_cast<unsigned int>(t.end() - t.begin());

287 ai_assert(length > 0);

288

289 const char* out;

290 const uint64_t id = strtoul10_64(t.begin(),&out,&length);

291 if (out > t.end()) {

292 err_out = "failed to parse ID (text)";

293 return 0L;

294 }

295

296 return id;

297 }

298

299

300 // ------------------------------------------------------------------------------------------------

301 size_t ParseTokenAsDim(const Token& t, const char*& err_out)

302 {

303 // same as ID parsing, except there is a trailing asterisk

304 err_out = NULL;

305

306 if (t.Type() != TokenType_DATA) {

307 err_out = "expected TOK_DATA token";

308 return 0;

309 }

310

311 if(t.IsBinary())

312 {

313 const char* data = t.begin();

314 if (data[0] != 'L') {

315 err_out = "failed to parse ID, unexpected data type, expected L(ong) (binary)";

316 return 0;

317 }

318

319 ai_assert(t.end() - data == 9);

320 BE_NCONST uint64_t id = *reinterpret_cast<const uint64_t*>(data+1);

321 AI_SWAP8(id);

322 return static_cast<size_t>(id);

323 }

324

325 if(*t.begin() != '*') {

326 err_out = "expected asterisk before array dimension";

327 return 0;

328 }

329

330 // XXX: should use size_t here

331 unsigned int length = static_cast<unsigned int>(t.end() - t.begin());

332 if(length == 0) {

333 err_out = "expected valid integer number after asterisk";

334 return 0;

335 }

336

337 const char* out;

338 const size_t id = static_cast<size_t>(strtoul10_64(t.begin() + 1,&out,&length));

339 if (out > t.end()) {

340 err_out = "failed to parse ID";

341 return 0;

342 }

343

344 return id;

345 }

346

347

348 // ------------------------------------------------------------------------------------------------

349 float ParseTokenAsFloat(const Token& t, const char*& err_out)

350 {

351 err_out = NULL;

352

353 if (t.Type() != TokenType_DATA) {

354 err_out = "expected TOK_DATA token";

355 return 0.0f;

356 }

357

358 if(t.IsBinary())

359 {

360 const char* data = t.begin();

361 if (data[0] != 'F' && data[0] != 'D') {

362 err_out = "failed to parse F(loat) or D(ouble), unexpected data type (binary)";

363 return 0.0f;

364 }

365

366 if (data[0] == 'F') {

367 ai_assert(t.end() - data == 5);

368 // no byte swapping needed for ieee floats

369 float res;

370 memcpy(&res, data + 1, sizeof res);

371 return res;

372 }

373 else {

374 ai_assert(t.end() - data == 9);

375 // no byte swapping needed for ieee floats

376 double res;

377 memcpy(&res, data + 1, sizeof res);

378 return (float)res;

379 }

380 }

381

382 // need to copy the input string to a temporary buffer

383 // first - next in the fbx token stream comes ',',

384 // which fast_atof could interpret as decimal point.

385 #define MAX_FLOAT_LENGTH 31

386 char temp[MAX_FLOAT_LENGTH + 1];

387 const size_t length = static_cast<size_t>(t.end()-t.begin());

388 std::copy(t.begin(),t.end(),temp);

389 temp[std::min(static_cast<size_t>(MAX_FLOAT_LENGTH),length)] = '\0';

390

391 return fast_atof(temp);

392 }

393

394

395 // ------------------------------------------------------------------------------------------------

396 int ParseTokenAsInt(const Token& t, const char*& err_out)

397 {

398 err_out = NULL;

399

400 if (t.Type() != TokenType_DATA) {

401 err_out = "expected TOK_DATA token";

402 return 0;

403 }

404

405 if(t.IsBinary())

406 {

407 const char* data = t.begin();

408 if (data[0] != 'I') {

409 err_out = "failed to parse I(nt), unexpected data type (binary)";

410 return 0;

411 }

412

413 ai_assert(t.end() - data == 5);

414 BE_NCONST int32_t ival = *reinterpret_cast<const int32_t*>(data+1);

415 AI_SWAP4(ival);

416 return static_cast<int>(ival);

417 }

418

419 ai_assert(static_cast<size_t>(t.end() - t.begin()) > 0);

420

421 const char* out;

422 const int intval = strtol10(t.begin(),&out);

423 if (out != t.end()) {

424 err_out = "failed to parse ID";

425 return 0;

426 }

427

428 return intval;

429 }

430

431

432 // ------------------------------------------------------------------------------------------------

433 std::string ParseTokenAsString(const Token& t, const char*& err_out)

434 {

435 err_out = NULL;

436

437 if (t.Type() != TokenType_DATA) {

438 err_out = "expected TOK_DATA token";

439 return "";

440 }

441

442 if(t.IsBinary())

443 {

444 const char* data = t.begin();

445 if (data[0] != 'S') {

446 err_out = "failed to parse S(tring), unexpected data type (binary)";

447 return "";

448 }

449

450 ai_assert(t.end() - data >= 5);

451

452 // read string length

453 BE_NCONST int32_t len = *reinterpret_cast<const int32_t*>(data+1);

454 AI_SWAP4(len);

455

456 ai_assert(t.end() - data == 5 + len);

457 return std::string(data + 5, len);

458 }

459

460 const size_t length = static_cast<size_t>(t.end() - t.begin());

461 if(length < 2) {

462 err_out = "token is too short to hold a string";

463 return "";

464 }

465

466 const char* s = t.begin(), *e = t.end() - 1;

467 if (*s != '\"' || *e != '\"') {

468 err_out = "expected double quoted string";

469 return "";

470 }

471

472 return std::string(s+1,length-2);

473 }

474

475

476 namespace {

477

478 // ------------------------------------------------------------------------------------------------

479 // read the type code and element count of a binary data array and stop there

480 void ReadBinaryDataArrayHead(const char*& data, const char* end, char& type, uint32_t& count,

481 const Element& el)

482 {

483 if (static_cast<size_t>(end-data) < 5) {

484 ParseError("binary data array is too short, need five (5) bytes for type signature and element count",&el);

485 }

486

487 // data type

488 type = *data;

489

490 // read number of elements

491 BE_NCONST uint32_t len = *reinterpret_cast<const uint32_t*>(data+1);

492 AI_SWAP4(len);

493

494 count = len;

495 data += 5;

496 }

497

498

499 // ------------------------------------------------------------------------------------------------

500 // read binary data array, assume cursor points to the 'compression mode' field (i.e. behind the header)

501 void ReadBinaryDataArray(char type, uint32_t count, const char*& data, const char* end,

502 std::vector<char>& buff,

503 const Element& el)

504 {

505 ai_assert(static_cast<size_t>(end-data) >= 4); // runtime check for this happens at tokenization stage

506

507 BE_NCONST uint32_t encmode = *reinterpret_cast<const uint32_t*>(data);

508 AI_SWAP4(encmode);

509 data += 4;

510

511 // next comes the compressed length

512 BE_NCONST uint32_t comp_len = *reinterpret_cast<const uint32_t*>(data);

513 AI_SWAP4(comp_len);

514 data += 4;

515

516 ai_assert(data + comp_len == end);

517

518 // determine the length of the uncompressed data by looking at the type signature

519 uint32_t stride;

520 switch(type)

521 {

522 case 'f':

523 case 'i':

524 stride = 4;

525 break;

526

527 case 'd':

528 case 'l':

529 stride = 8;

530 break;

531

532 default:

533 ai_assert(false);

534 };

535

536 const uint32_t full_length = stride * count;

537 buff.resize(full_length);

538

539 if(encmode == 0) {

540 ai_assert(full_length == comp_len);

541

542 // plain data, no compression

543 std::copy(data, end, buff.begin());

544 }

545 else if(encmode == 1) {

546 // zlib/deflate, next comes ZIP head (0x78 0x01)

547 // see http://www.ietf.org/rfc/rfc1950.txt

548

549 z_stream zstream;

550 zstream.opaque = Z_NULL;

551 zstream.zalloc = Z_NULL;

552 zstream.zfree = Z_NULL;

553 zstream.data_type = Z_BINARY;

554

555 // http://hewgill.com/journal/entries/349-how-to-decompress-gzip-stream-with-zlib

556 inflateInit(&zstream);

557

558 zstream.next_in = reinterpret_cast<Bytef*>( const_cast<char*>(data) );

559 zstream.avail_in = comp_len;

560

561 zstream.avail_out = buff.size();

562 zstream.next_out = reinterpret_cast<Bytef*>(&*buff.begin());

563 const int ret = inflate(&zstream, Z_FINISH);

564

565 if (ret != Z_STREAM_END && ret != Z_OK) {

566 ParseError("failure decompressing compressed data section");

567 }

568

569 // terminate zlib

570 inflateEnd(&zstream);

571 }

572 #ifdef _DEBUG

573 else {

574 // runtime check for this happens at tokenization stage

575 ai_assert(false);

576 }

577 #endif

578

579 data += comp_len;

580 ai_assert(data == end);

581 }

582

583 } // !anon

584

585

586 // ------------------------------------------------------------------------------------------------

587 // read an array of float3 tuples

588 void ParseVectorDataArray(std::vector<aiVector3D>& out, const Element& el)

589 {

590 out.clear();

591

592 const TokenList& tok = el.Tokens();

593 if(tok.empty()) {

594 ParseError("unexpected empty element",&el);

595 }

596

597 if(tok[0]->IsBinary()) {

598 const char* data = tok[0]->begin(), *end = tok[0]->end();

599

600 char type;

601 uint32_t count;

602 ReadBinaryDataArrayHead(data, end, type, count, el);

603

604 if(count % 3 != 0) {

605 ParseError("number of floats is not a multiple of three (3) (binary)",&el);

606 }

607

608 if(!count) {

609 return;

610 }

611

612 if (type != 'd' && type != 'f') {

613 ParseError("expected float or double array (binary)",&el);

614 }

615

616 std::vector<char> buff;

617 ReadBinaryDataArray(type, count, data, end, buff, el);

618

619 ai_assert(data == end);

620 ai_assert(buff.size() == count * (type == 'd' ? 8 : 4));

621

622 const uint32_t count3 = count / 3;

623 out.reserve(count3);

624

625 if (type == 'd') {

626 const double* d = reinterpret_cast<const double*>(&buff[0]);

627 for (unsigned int i = 0; i < count3; ++i, d += 3) {

628 out.push_back(aiVector3D(static_cast<float>(d[0]),

629 static_cast<float>(d[1]),

630 static_cast<float>(d[2])));

631 }

632 }

633 else if (type == 'f') {

634 const float* f = reinterpret_cast<const float*>(&buff[0]);

635 for (unsigned int i = 0; i < count3; ++i, f += 3) {

636 out.push_back(aiVector3D(f[0],f[1],f[2]));

637 }

638 }

639

640 return;

641 }

642

643 const size_t dim = ParseTokenAsDim(*tok[0]);

644

645 // may throw bad_alloc if the input is rubbish, but this need

646 // not to be prevented - importing would fail but we wouldn't

647 // crash since assimp handles this case properly.

648 out.reserve(dim);

649

650 const Scope& scope = GetRequiredScope(el);

651 const Element& a = GetRequiredElement(scope,"a",&el);

652

653 if (a.Tokens().size() % 3 != 0) {

654 ParseError("number of floats is not a multiple of three (3)",&el);

655 }

656 for (TokenList::const_iterator it = a.Tokens().begin(), end = a.Tokens().end(); it != end; ) {

657 aiVector3D v;

658 v.x = ParseTokenAsFloat(**it++);

659 v.y = ParseTokenAsFloat(**it++);

660 v.z = ParseTokenAsFloat(**it++);

661

662 out.push_back(v);

663 }

664 }

665

666

667 // ------------------------------------------------------------------------------------------------

668 // read an array of color4 tuples

669 void ParseVectorDataArray(std::vector<aiColor4D>& out, const Element& el)

670 {

671 out.clear();

672 const TokenList& tok = el.Tokens();

673 if(tok.empty()) {

674 ParseError("unexpected empty element",&el);

675 }

676

677 if(tok[0]->IsBinary()) {

678 const char* data = tok[0]->begin(), *end = tok[0]->end();

679

680 char type;

681 uint32_t count;

682 ReadBinaryDataArrayHead(data, end, type, count, el);

683

684 if(count % 4 != 0) {

685 ParseError("number of floats is not a multiple of four (4) (binary)",&el);

686 }

687

688 if(!count) {

689 return;

690 }

691

692 if (type != 'd' && type != 'f') {

693 ParseError("expected float or double array (binary)",&el);

694 }

695

696 std::vector<char> buff;

697 ReadBinaryDataArray(type, count, data, end, buff, el);

698

699 ai_assert(data == end);

700 ai_assert(buff.size() == count * (type == 'd' ? 8 : 4));

701

702 const uint32_t count4 = count / 4;

703 out.reserve(count4);

704

705 if (type == 'd') {

706 const double* d = reinterpret_cast<const double*>(&buff[0]);

707 for (unsigned int i = 0; i < count4; ++i, d += 4) {

708 out.push_back(aiColor4D(static_cast<float>(d[0]),

709 static_cast<float>(d[1]),

710 static_cast<float>(d[2]),

711 static_cast<float>(d[3])));

712 }

713 }

714 else if (type == 'f') {

715 const float* f = reinterpret_cast<const float*>(&buff[0]);

716 for (unsigned int i = 0; i < count4; ++i, f += 4) {

717 out.push_back(aiColor4D(f[0],f[1],f[2],f[3]));

718 }

719 }

720 return;

721 }

722

723 const size_t dim = ParseTokenAsDim(*tok[0]);

724

725 // see notes in ParseVectorDataArray() above

726 out.reserve(dim);

727

728 const Scope& scope = GetRequiredScope(el);

729 const Element& a = GetRequiredElement(scope,"a",&el);

730

731 if (a.Tokens().size() % 4 != 0) {

732 ParseError("number of floats is not a multiple of four (4)",&el);

733 }

734 for (TokenList::const_iterator it = a.Tokens().begin(), end = a.Tokens().end(); it != end; ) {

735 aiColor4D v;

736 v.r = ParseTokenAsFloat(**it++);

737 v.g = ParseTokenAsFloat(**it++);

738 v.b = ParseTokenAsFloat(**it++);

739 v.a = ParseTokenAsFloat(**it++);

740

741 out.push_back(v);

742 }

743 }

744

745

746 // ------------------------------------------------------------------------------------------------

747 // read an array of float2 tuples

748 void ParseVectorDataArray(std::vector<aiVector2D>& out, const Element& el)

749 {

750 out.clear();

751 const TokenList& tok = el.Tokens();

752 if(tok.empty()) {

753 ParseError("unexpected empty element",&el);

754 }

755

756 if(tok[0]->IsBinary()) {

757 const char* data = tok[0]->begin(), *end = tok[0]->end();

758

759 char type;

760 uint32_t count;

761 ReadBinaryDataArrayHead(data, end, type, count, el);

762

763 if(count % 2 != 0) {

764 ParseError("number of floats is not a multiple of two (2) (binary)",&el);

765 }

766

767 if(!count) {

768 return;

769 }

770

771 if (type != 'd' && type != 'f') {

772 ParseError("expected float or double array (binary)",&el);

773 }

774

775 std::vector<char> buff;

776 ReadBinaryDataArray(type, count, data, end, buff, el);

777

778 ai_assert(data == end);

779 ai_assert(buff.size() == count * (type == 'd' ? 8 : 4));

780

781 const uint32_t count2 = count / 2;

782 out.reserve(count2);

783

784 if (type == 'd') {

785 const double* d = reinterpret_cast<const double*>(&buff[0]);

786 for (unsigned int i = 0; i < count2; ++i, d += 2) {

787 out.push_back(aiVector2D(static_cast<float>(d[0]),

788 static_cast<float>(d[1])));

789 }

790 }

791 else if (type == 'f') {

792 const float* f = reinterpret_cast<const float*>(&buff[0]);

793 for (unsigned int i = 0; i < count2; ++i, f += 2) {

794 out.push_back(aiVector2D(f[0],f[1]));

795 }

796 }

797

798 return;

799 }

800

801 const size_t dim = ParseTokenAsDim(*tok[0]);

802

803 // see notes in ParseVectorDataArray() above

804 out.reserve(dim);

805

806 const Scope& scope = GetRequiredScope(el);

807 const Element& a = GetRequiredElement(scope,"a",&el);

808

809 if (a.Tokens().size() % 2 != 0) {

810 ParseError("number of floats is not a multiple of two (2)",&el);

811 }

812 for (TokenList::const_iterator it = a.Tokens().begin(), end = a.Tokens().end(); it != end; ) {

813 aiVector2D v;

814 v.x = ParseTokenAsFloat(**it++);

815 v.y = ParseTokenAsFloat(**it++);

816

817 out.push_back(v);

818 }

819 }

820

821

822 // ------------------------------------------------------------------------------------------------

823 // read an array of ints

824 void ParseVectorDataArray(std::vector<int>& out, const Element& el)

825 {

826 out.clear();

827 const TokenList& tok = el.Tokens();

828 if(tok.empty()) {

829 ParseError("unexpected empty element",&el);

830 }

831

832 if(tok[0]->IsBinary()) {

833 const char* data = tok[0]->begin(), *end = tok[0]->end();

834

835 char type;

836 uint32_t count;

837 ReadBinaryDataArrayHead(data, end, type, count, el);

838

839 if(!count) {

840 return;

841 }

842

843 if (type != 'i') {

844 ParseError("expected int array (binary)",&el);

845 }

846

847 std::vector<char> buff;

848 ReadBinaryDataArray(type, count, data, end, buff, el);

849

850 ai_assert(data == end);

851 ai_assert(buff.size() == count * 4);

852

853 out.reserve(count);

854

855 const int32_t* ip = reinterpret_cast<const int32_t*>(&buff[0]);

856 for (unsigned int i = 0; i < count; ++i, ++ip) {

857 BE_NCONST int32_t val = *ip;

858 AI_SWAP4(val);

859 out.push_back(val);

860 }

861

862 return;

863 }

864

865 const size_t dim = ParseTokenAsDim(*tok[0]);

866

867 // see notes in ParseVectorDataArray()

868 out.reserve(dim);

869

870 const Scope& scope = GetRequiredScope(el);

871 const Element& a = GetRequiredElement(scope,"a",&el);

872

873 for (TokenList::const_iterator it = a.Tokens().begin(), end = a.Tokens().end(); it != end; ) {

874 const int ival = ParseTokenAsInt(**it++);

875 out.push_back(ival);

876 }

877 }

878

879

880 // ------------------------------------------------------------------------------------------------

881 // read an array of floats

882 void ParseVectorDataArray(std::vector<float>& out, const Element& el)

883 {

884 out.clear();

885 const TokenList& tok = el.Tokens();

886 if(tok.empty()) {

887 ParseError("unexpected empty element",&el);

888 }

889

890 if(tok[0]->IsBinary()) {

891 const char* data = tok[0]->begin(), *end = tok[0]->end();

892

893 char type;

894 uint32_t count;

895 ReadBinaryDataArrayHead(data, end, type, count, el);

896

897 if(!count) {

898 return;

899 }

900

901 if (type != 'd' && type != 'f') {

902 ParseError("expected float or double array (binary)",&el);

903 }

904

905 std::vector<char> buff;

906 ReadBinaryDataArray(type, count, data, end, buff, el);

907

908 ai_assert(data == end);

909 ai_assert(buff.size() == count * (type == 'd' ? 8 : 4));

910

911 if (type == 'd') {

912 const double* d = reinterpret_cast<const double*>(&buff[0]);

913 for (unsigned int i = 0; i < count; ++i, ++d) {

914 out.push_back(static_cast<float>(*d));

915 }

916 }

917 else if (type == 'f') {

918 const float* f = reinterpret_cast<const float*>(&buff[0]);

919 for (unsigned int i = 0; i < count; ++i, ++f) {

920 out.push_back(*f);

921 }

922 }

923

924 return;

925 }

926

927 const size_t dim = ParseTokenAsDim(*tok[0]);

928

929 // see notes in ParseVectorDataArray()

930 out.reserve(dim);

931

932 const Scope& scope = GetRequiredScope(el);

933 const Element& a = GetRequiredElement(scope,"a",&el);

934

935 for (TokenList::const_iterator it = a.Tokens().begin(), end = a.Tokens().end(); it != end; ) {

936 const float ival = ParseTokenAsFloat(**it++);

937 out.push_back(ival);

938 }

939 }

940

941

942 // ------------------------------------------------------------------------------------------------

943 // read an array of uints

944 void ParseVectorDataArray(std::vector<unsigned int>& out, const Element& el)

945 {

946 out.clear();

947 const TokenList& tok = el.Tokens();

948 if(tok.empty()) {

949 ParseError("unexpected empty element",&el);

950 }

951

952 if(tok[0]->IsBinary()) {

953 const char* data = tok[0]->begin(), *end = tok[0]->end();

954

955 char type;

956 uint32_t count;

957 ReadBinaryDataArrayHead(data, end, type, count, el);

958

959 if(!count) {

960 return;

961 }

962

963 if (type != 'i') {

964 ParseError("expected (u)int array (binary)",&el);

965 }

966

967 std::vector<char> buff;

968 ReadBinaryDataArray(type, count, data, end, buff, el);

969

970 ai_assert(data == end);

971 ai_assert(buff.size() == count * 4);

972

973 out.reserve(count);

974

975 const int32_t* ip = reinterpret_cast<const int32_t*>(&buff[0]);

976 for (unsigned int i = 0; i < count; ++i, ++ip) {

977 BE_NCONST int32_t val = *ip;

978 if(val < 0) {

979 ParseError("encountered negative integer index (binary)");

980 }

981

982 AI_SWAP4(val);

983 out.push_back(val);

984 }

985

986 return;

987 }

988

989 const size_t dim = ParseTokenAsDim(*tok[0]);

990

991 // see notes in ParseVectorDataArray()

992 out.reserve(dim);

993

994 const Scope& scope = GetRequiredScope(el);

995 const Element& a = GetRequiredElement(scope,"a",&el);

996

997 for (TokenList::const_iterator it = a.Tokens().begin(), end = a.Tokens().end(); it != end; ) {

998 const int ival = ParseTokenAsInt(**it++);

999 if(ival < 0) {

1000 ParseError("encountered negative integer index");

1001 }

1002 out.push_back(static_cast<unsigned int>(ival));

1003 }

1004 }

1005

1006

1007 // ------------------------------------------------------------------------------------------------

1008 // read an array of uint64_ts

1009 void ParseVectorDataArray(std::vector<uint64_t>& out, const Element& el)

1010 {

1011 out.clear();

1012 const TokenList& tok = el.Tokens();

1013 if(tok.empty()) {

1014 ParseError("unexpected empty element",&el);

1015 }

1016

1017 if(tok[0]->IsBinary()) {

1018 const char* data = tok[0]->begin(), *end = tok[0]->end();

1019

1020 char type;

1021 uint32_t count;

1022 ReadBinaryDataArrayHead(data, end, type, count, el);

1023

1024 if(!count) {

1025 return;

1026 }

1027

1028 if (type != 'l') {

1029 ParseError("expected long array (binary)",&el);

1030 }

1031

1032 std::vector<char> buff;

1033 ReadBinaryDataArray(type, count, data, end, buff, el);

1034

1035 ai_assert(data == end);

1036 ai_assert(buff.size() == count * 8);

1037

1038 out.reserve(count);

1039

1040 const uint64_t* ip = reinterpret_cast<const uint64_t*>(&buff[0]);

1041 for (unsigned int i = 0; i < count; ++i, ++ip) {

1042 BE_NCONST uint64_t val = *ip;

1043 AI_SWAP8(val);

1044 out.push_back(val);

1045 }

1046

1047 return;

1048 }

1049

1050 const size_t dim = ParseTokenAsDim(*tok[0]);

1051

1052 // see notes in ParseVectorDataArray()

1053 out.reserve(dim);

1054

1055 const Scope& scope = GetRequiredScope(el);

1056 const Element& a = GetRequiredElement(scope,"a",&el);

1057

1058 for (TokenList::const_iterator it = a.Tokens().begin(), end = a.Tokens().end(); it != end; ) {

1059 const uint64_t ival = ParseTokenAsID(**it++);

1060

1061 out.push_back(ival);

1062 }

1063 }

1064

1065

1066 // ------------------------------------------------------------------------------------------------

1067 aiMatrix4x4 ReadMatrix(const Element& element)

1068 {

1069 std::vector<float> values;

1070 ParseVectorDataArray(values,element);

1071

1072 if(values.size() != 16) {

1073 ParseError("expected 16 matrix elements");

1074 }

1075

1076 aiMatrix4x4 result;

1077

1078

1079 result.a1 = values[0];

1080 result.a2 = values[1];

1081 result.a3 = values[2];

1082 result.a4 = values[3];

1083

1084 result.b1 = values[4];

1085 result.b2 = values[5];

1086 result.b3 = values[6];

1087 result.b4 = values[7];

1088

1089 result.c1 = values[8];

1090 result.c2 = values[9];

1091 result.c3 = values[10];

1092 result.c4 = values[11];

1093

1094 result.d1 = values[12];

1095 result.d2 = values[13];

1096 result.d3 = values[14];

1097 result.d4 = values[15];

1098

1099 result.Transpose();

1100 return result;

1101 }

1102

1103

1104 // ------------------------------------------------------------------------------------------------

1105 // wrapper around ParseTokenAsString() with ParseError handling

1106 std::string ParseTokenAsString(const Token& t)

1107 {

1108 const char* err;

1109 const std::string& i = ParseTokenAsString(t,err);

1110 if(err) {

1111 ParseError(err,t);

1112 }

1113 return i;

1114 }

1115

1116

1117 // ------------------------------------------------------------------------------------------------

1118 // extract a required element from a scope, abort if the element cannot be found

1119 const Element& GetRequiredElement(const Scope& sc, const std::string& index, const Element* element /*= NULL*/)

1120 {

1121 const Element* el = sc[index];

1122 if(!el) {

1123 ParseError("did not find required element \"" + index + "\"",element);

1124 }

1125 return *el;

1126 }

1127

1128

1129 // ------------------------------------------------------------------------------------------------

1130 // extract required compound scope

1131 const Scope& GetRequiredScope(const Element& el)

1132 {

1133 const Scope* const s = el.Compound();

1134 if(!s) {

1135 ParseError("expected compound scope",&el);

1136 }

1137

1138 return *s;

1139 }

1140

1141

1142 // ------------------------------------------------------------------------------------------------

1143 // get token at a particular index

1144 const Token& GetRequiredToken(const Element& el, unsigned int index)

1145 {

1146 const TokenList& t = el.Tokens();

1147 if(index >= t.size()) {

1148 ParseError(Formatter::format( "missing token at index " ) << index,&el);

1149 }

1150

1151 return *t[index];

1152 }

1153

1154

1155 // ------------------------------------------------------------------------------------------------

1156 // wrapper around ParseTokenAsID() with ParseError handling

1157 uint64_t ParseTokenAsID(const Token& t)

1158 {

1159 const char* err;

1160 const uint64_t i = ParseTokenAsID(t,err);

1161 if(err) {

1162 ParseError(err,t);

1163 }

1164 return i;

1165 }

1166

1167

1168 // ------------------------------------------------------------------------------------------------

1169 // wrapper around ParseTokenAsDim() with ParseError handling

1170 size_t ParseTokenAsDim(const Token& t)

1171 {

1172 const char* err;

1173 const size_t i = ParseTokenAsDim(t,err);

1174 if(err) {

1175 ParseError(err,t);

1176 }

1177 return i;

1178 }

1179

1180

1181 // ------------------------------------------------------------------------------------------------

1182 // wrapper around ParseTokenAsFloat() with ParseError handling

1183 float ParseTokenAsFloat(const Token& t)

1184 {

1185 const char* err;

1186 const float i = ParseTokenAsFloat(t,err);

1187 if(err) {

1188 ParseError(err,t);

1189 }

1190 return i;

1191 }

1192

1193

1194 // ------------------------------------------------------------------------------------------------

1195 // wrapper around ParseTokenAsInt() with ParseError handling

1196 int ParseTokenAsInt(const Token& t)

1197 {

1198 const char* err;

1199 const int i = ParseTokenAsInt(t,err);

1200 if(err) {

1201 ParseError(err,t);

1202 }

1203 return i;

1204 }

1205

1206

1207

1208 } // !FBX

1209 } // !Assimp

1210

1211 #endif

1212