vrshoot: e7ca128b8713 libs/assimp/ACLoader.cpp

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view libs/assimp/ACLoader.cpp @ 1:e7ca128b8713

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author	John Tsiombikas <nuclear@member.fsf.org>
date	Sun, 02 Feb 2014 00:35:22 +0200
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2 /*

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

4 Open Asset Import Library (assimp)

5 ---------------------------------------------------------------------------

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

12 with or without modification, are permitted provided that the following

13 conditions are met:

15 * Redistributions of source code must retain the above

16 copyright notice, this list of conditions and the

17 following disclaimer.

19 * Redistributions in binary form must reproduce the above

20 copyright notice, this list of conditions and the

21 following disclaimer in the documentation and/or other

22 materials provided with the distribution.

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

25 contributors may be used to endorse or promote products

26 derived from this software without specific prior

27 written permission of the assimp team.

29 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

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

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

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

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

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

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

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

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

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

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

40 ---------------------------------------------------------------------------

41 */

43 /** @file Implementation of the AC3D importer class */

45 #include "AssimpPCH.h"

47 #ifndef ASSIMP_BUILD_NO_AC_IMPORTER

49 // internal headers

50 #include "ACLoader.h"

51 #include "ParsingUtils.h"

52 #include "fast_atof.h"

53 #include "Subdivision.h"

55 using namespace Assimp;

57 static const aiImporterDesc desc = {

58 "AC3D Importer",

59 "",

60 "",

61 "",

62 aiImporterFlags_SupportTextFlavour,

63 0,

64 0,

65 0,

66 0,

67 "ac acc ac3d"

68 };

70 // ------------------------------------------------------------------------------------------------

71 // skip to the next token

72 #define AI_AC_SKIP_TO_NEXT_TOKEN() \

73 if (!SkipSpaces(&buffer)) \

74 { \

75 DefaultLogger::get()->error("AC3D: Unexpected EOF/EOL"); \

76 continue; \

77 }

79 // ------------------------------------------------------------------------------------------------

80 // read a string (may be enclosed in double quotation marks). buffer must point to "

81 #define AI_AC_GET_STRING(out) \

82 ++buffer; \

83 const char* sz = buffer; \

84 while ('\"' != *buffer) \

85 { \

86 if (IsLineEnd( *buffer )) \

87 { \

88 DefaultLogger::get()->error("AC3D: Unexpected EOF/EOL in string"); \

89 out = "ERROR"; \

90 break; \

91 } \

92 ++buffer; \

93 } \

94 if (IsLineEnd( *buffer ))continue; \

95 out = std::string(sz,(unsigned int)(buffer-sz)); \

96 ++buffer;

99 // ------------------------------------------------------------------------------------------------

100 // read 1 to n floats prefixed with an optional predefined identifier

101 #define AI_AC_CHECKED_LOAD_FLOAT_ARRAY(name,name_length,num,out) \

102 AI_AC_SKIP_TO_NEXT_TOKEN(); \

103 if (name_length) \

104 { \

105 if (strncmp(buffer,name,name_length) || !IsSpace(buffer[name_length])) \

106 { \

107 DefaultLogger::get()->error("AC3D: Unexpexted token. " name " was expected."); \

108 continue; \

109 } \

110 buffer += name_length+1; \

111 } \

112 for (unsigned int i = 0; i < num;++i) \

113 { \

114 AI_AC_SKIP_TO_NEXT_TOKEN(); \

115 buffer = fast_atoreal_move<float>(buffer,((float*)out)[i]); \

116 }

117

118

119 // ------------------------------------------------------------------------------------------------

120 // Constructor to be privately used by Importer

121 AC3DImporter::AC3DImporter()

122 {

123 // nothing to be done here

124 }

125

126 // ------------------------------------------------------------------------------------------------

127 // Destructor, private as well

128 AC3DImporter::~AC3DImporter()

129 {

130 // nothing to be done here

131 }

132

133 // ------------------------------------------------------------------------------------------------

134 // Returns whether the class can handle the format of the given file.

135 bool AC3DImporter::CanRead( const std::string& pFile, IOSystem* pIOHandler, bool checkSig) const

136 {

137 std::string extension = GetExtension(pFile);

138

139 // fixme: are acc and ac3d *really* used? Some sources say they are

140 if(extension == "ac" || extension == "ac3d" || extension == "acc") {

141 return true;

142 }

143 if (!extension.length() || checkSig) {

144 uint32_t token = AI_MAKE_MAGIC("AC3D");

145 return CheckMagicToken(pIOHandler,pFile,&token,1,0);

146 }

147 return false;

148 }

149

150 // ------------------------------------------------------------------------------------------------

151 // Loader meta information

152 const aiImporterDesc* AC3DImporter::GetInfo () const

153 {

154 return &desc;

155 }

156

157 // ------------------------------------------------------------------------------------------------

158 // Get a pointer to the next line from the file

159 bool AC3DImporter::GetNextLine( )

160 {

161 SkipLine(&buffer);

162 return SkipSpaces(&buffer);

163 }

164

165 // ------------------------------------------------------------------------------------------------

166 // Parse an object section in an AC file

167 void AC3DImporter::LoadObjectSection(std::vector<Object>& objects)

168 {

169 if (!TokenMatch(buffer,"OBJECT",6))

170 return;

171

172 SkipSpaces(&buffer);

173

174 ++mNumMeshes;

175

176 objects.push_back(Object());

177 Object& obj = objects.back();

178

179 aiLight* light = NULL;

180 if (!ASSIMP_strincmp(buffer,"light",5))

181 {

182 // This is a light source. Add it to the list

183 mLights->push_back(light = new aiLight());

184

185 // Return a point light with no attenuation

186 light->mType = aiLightSource_POINT;

187 light->mColorDiffuse = light->mColorSpecular = aiColor3D(1.f,1.f,1.f);

188 light->mAttenuationConstant = 1.f;

189

190 // Generate a default name for both the light source and the node

191 // FIXME - what's the right way to print a size_t? Is 'zu' universally available? stick with the safe version.

192 light->mName.length = ::sprintf(light->mName.data,"ACLight_%i",static_cast<unsigned int>(mLights->size())-1);

193 obj.name = std::string( light->mName.data );

194

195 DefaultLogger::get()->debug("AC3D: Light source encountered");

196 obj.type = Object::Light;

197 }

198 else if (!ASSIMP_strincmp(buffer,"group",5))

199 {

200 obj.type = Object::Group;

201 }

202 else if (!ASSIMP_strincmp(buffer,"world",5))

203 {

204 obj.type = Object::World;

205 }

206 else obj.type = Object::Poly;

207 while (GetNextLine())

208 {

209 if (TokenMatch(buffer,"kids",4))

210 {

211 SkipSpaces(&buffer);

212 unsigned int num = strtoul10(buffer,&buffer);

213 GetNextLine();

214 if (num)

215 {

216 // load the children of this object recursively

217 obj.children.reserve(num);

218 for (unsigned int i = 0; i < num; ++i)

219 LoadObjectSection(obj.children);

220 }

221 return;

222 }

223 else if (TokenMatch(buffer,"name",4))

224 {

225 SkipSpaces(&buffer);

226 AI_AC_GET_STRING(obj.name);

227

228 // If this is a light source, we'll also need to store

229 // the name of the node in it.

230 if (light)

231 {

232 light->mName.Set(obj.name);

233 }

234 }

235 else if (TokenMatch(buffer,"texture",7))

236 {

237 SkipSpaces(&buffer);

238 AI_AC_GET_STRING(obj.texture);

239 }

240 else if (TokenMatch(buffer,"texrep",6))

241 {

242 SkipSpaces(&buffer);

243 AI_AC_CHECKED_LOAD_FLOAT_ARRAY("",0,2,&obj.texRepeat);

244 if (!obj.texRepeat.x || !obj.texRepeat.y)

245 obj.texRepeat = aiVector2D (1.f,1.f);

246 }

247 else if (TokenMatch(buffer,"texoff",6))

248 {

249 SkipSpaces(&buffer);

250 AI_AC_CHECKED_LOAD_FLOAT_ARRAY("",0,2,&obj.texOffset);

251 }

252 else if (TokenMatch(buffer,"rot",3))

253 {

254 SkipSpaces(&buffer);

255 AI_AC_CHECKED_LOAD_FLOAT_ARRAY("",0,9,&obj.rotation);

256 }

257 else if (TokenMatch(buffer,"loc",3))

258 {

259 SkipSpaces(&buffer);

260 AI_AC_CHECKED_LOAD_FLOAT_ARRAY("",0,3,&obj.translation);

261 }

262 else if (TokenMatch(buffer,"subdiv",6))

263 {

264 SkipSpaces(&buffer);

265 obj.subDiv = strtoul10(buffer,&buffer);

266 }

267 else if (TokenMatch(buffer,"crease",6))

268 {

269 SkipSpaces(&buffer);

270 obj.crease = fast_atof(buffer);

271 }

272 else if (TokenMatch(buffer,"numvert",7))

273 {

274 SkipSpaces(&buffer);

275

276 unsigned int t = strtoul10(buffer,&buffer);

277 obj.vertices.reserve(t);

278 for (unsigned int i = 0; i < t;++i)

279 {

280 if (!GetNextLine())

281 {

282 DefaultLogger::get()->error("AC3D: Unexpected EOF: not all vertices have been parsed yet");

283 break;

284 }

285 else if (!IsNumeric(*buffer))

286 {

287 DefaultLogger::get()->error("AC3D: Unexpected token: not all vertices have been parsed yet");

288 --buffer; // make sure the line is processed a second time

289 break;

290 }

291 obj.vertices.push_back(aiVector3D());

292 aiVector3D& v = obj.vertices.back();

293 AI_AC_CHECKED_LOAD_FLOAT_ARRAY("",0,3,&v.x);

294 }

295 }

296 else if (TokenMatch(buffer,"numsurf",7))

297 {

298 SkipSpaces(&buffer);

299

300 bool Q3DWorkAround = false;

301

302 const unsigned int t = strtoul10(buffer,&buffer);

303 obj.surfaces.reserve(t);

304 for (unsigned int i = 0; i < t;++i)

305 {

306 GetNextLine();

307 if (!TokenMatch(buffer,"SURF",4))

308 {

309 // FIX: this can occur for some files - Quick 3D for

310 // example writes no surf chunks

311 if (!Q3DWorkAround)

312 {

313 DefaultLogger::get()->warn("AC3D: SURF token was expected");

314 DefaultLogger::get()->debug("Continuing with Quick3D Workaround enabled");

315 }

316 --buffer; // make sure the line is processed a second time

317 // break; --- see fix notes above

318

319 Q3DWorkAround = true;

320 }

321 SkipSpaces(&buffer);

322 obj.surfaces.push_back(Surface());

323 Surface& surf = obj.surfaces.back();

324 surf.flags = strtoul_cppstyle(buffer);

325

326 while (1)

327 {

328 if(!GetNextLine())

329 {

330 DefaultLogger::get()->error("AC3D: Unexpected EOF: surface is incomplete");

331 break;

332 }

333 if (TokenMatch(buffer,"mat",3))

334 {

335 SkipSpaces(&buffer);

336 surf.mat = strtoul10(buffer);

337 }

338 else if (TokenMatch(buffer,"refs",4))

339 {

340 // --- see fix notes above

341 if (Q3DWorkAround)

342 {

343 if (!surf.entries.empty())

344 {

345 buffer -= 6;

346 break;

347 }

348 }

349

350 SkipSpaces(&buffer);

351 const unsigned int m = strtoul10(buffer);

352 surf.entries.reserve(m);

353

354 obj.numRefs += m;

355

356 for (unsigned int k = 0; k < m; ++k)

357 {

358 if(!GetNextLine())

359 {

360 DefaultLogger::get()->error("AC3D: Unexpected EOF: surface references are incomplete");

361 break;

362 }

363 surf.entries.push_back(Surface::SurfaceEntry());

364 Surface::SurfaceEntry& entry = surf.entries.back();

365

366 entry.first = strtoul10(buffer,&buffer);

367 SkipSpaces(&buffer);

368 AI_AC_CHECKED_LOAD_FLOAT_ARRAY("",0,2,&entry.second);

369 }

370 }

371 else

372 {

373

374 --buffer; // make sure the line is processed a second time

375 break;

376 }

377 }

378 }

379 }

380 }

381 DefaultLogger::get()->error("AC3D: Unexpected EOF: \'kids\' line was expected");

382 }

383

384 // ------------------------------------------------------------------------------------------------

385 // Convert a material from AC3DImporter::Material to aiMaterial

386 void AC3DImporter::ConvertMaterial(const Object& object,

387 const Material& matSrc,

388 aiMaterial& matDest)

389 {

390 aiString s;

391

392 if (matSrc.name.length())

393 {

394 s.Set(matSrc.name);

395 matDest.AddProperty(&s,AI_MATKEY_NAME);

396 }

397 if (object.texture.length())

398 {

399 s.Set(object.texture);

400 matDest.AddProperty(&s,AI_MATKEY_TEXTURE_DIFFUSE(0));

401

402 // UV transformation

403 if (1.f != object.texRepeat.x || 1.f != object.texRepeat.y ||

404 object.texOffset.x || object.texOffset.y)

405 {

406 aiUVTransform transform;

407 transform.mScaling = object.texRepeat;

408 transform.mTranslation = object.texOffset;

409 matDest.AddProperty(&transform,1,AI_MATKEY_UVTRANSFORM_DIFFUSE(0));

410 }

411 }

412

413 matDest.AddProperty<aiColor3D>(&matSrc.rgb,1, AI_MATKEY_COLOR_DIFFUSE);

414 matDest.AddProperty<aiColor3D>(&matSrc.amb,1, AI_MATKEY_COLOR_AMBIENT);

415 matDest.AddProperty<aiColor3D>(&matSrc.emis,1,AI_MATKEY_COLOR_EMISSIVE);

416 matDest.AddProperty<aiColor3D>(&matSrc.spec,1,AI_MATKEY_COLOR_SPECULAR);

417

418 int n;

419 if (matSrc.shin)

420 {

421 n = aiShadingMode_Phong;

422 matDest.AddProperty<float>(&matSrc.shin,1,AI_MATKEY_SHININESS);

423 }

424 else n = aiShadingMode_Gouraud;

425 matDest.AddProperty<int>(&n,1,AI_MATKEY_SHADING_MODEL);

426

427 float f = 1.f - matSrc.trans;

428 matDest.AddProperty<float>(&f,1,AI_MATKEY_OPACITY);

429 }

430

431 // ------------------------------------------------------------------------------------------------

432 // Converts the loaded data to the internal verbose representation

433 aiNode* AC3DImporter::ConvertObjectSection(Object& object,

434 std::vector<aiMesh*>& meshes,

435 std::vector<aiMaterial*>& outMaterials,

436 const std::vector<Material>& materials,

437 aiNode* parent)

438 {

439 aiNode* node = new aiNode();

440 node->mParent = parent;

441 if (object.vertices.size())

442 {

443 if (!object.surfaces.size() || !object.numRefs)

444 {

445 /* " An object with 7 vertices (no surfaces, no materials defined).

446 This is a good way of getting point data into AC3D.

447 The Vertex->create convex-surface/object can be used on these

448 vertices to 'wrap' a 3d shape around them "

449 (http://www.opencity.info/html/ac3dfileformat.html)

450

451 therefore: if no surfaces are defined return point data only

452 */

453

454 DefaultLogger::get()->info("AC3D: No surfaces defined in object definition, "

455 "a point list is returned");

456

457 meshes.push_back(new aiMesh());

458 aiMesh* mesh = meshes.back();

459

460 mesh->mNumFaces = mesh->mNumVertices = (unsigned int)object.vertices.size();

461 aiFace* faces = mesh->mFaces = new aiFace[mesh->mNumFaces];

462 aiVector3D* verts = mesh->mVertices = new aiVector3D[mesh->mNumVertices];

463

464 for (unsigned int i = 0; i < mesh->mNumVertices;++i,++faces,++verts)

465 {

466 *verts = object.vertices[i];

467 faces->mNumIndices = 1;

468 faces->mIndices = new unsigned int[1];

469 faces->mIndices[0] = i;

470 }

471

472 // use the primary material in this case. this should be the

473 // default material if all objects of the file contain points

474 // and no faces.

475 mesh->mMaterialIndex = 0;

476 outMaterials.push_back(new aiMaterial());

477 ConvertMaterial(object, materials[0], *outMaterials.back());

478 }

479 else

480 {

481 // need to generate one or more meshes for this object.

482 // find out how many different materials we have

483 typedef std::pair< unsigned int, unsigned int > IntPair;

484 typedef std::vector< IntPair > MatTable;

485 MatTable needMat(materials.size(),IntPair(0,0));

486

487 std::vector<Surface>::iterator it,end = object.surfaces.end();

488 std::vector<Surface::SurfaceEntry>::iterator it2,end2;

489

490 for (it = object.surfaces.begin(); it != end; ++it)

491 {

492 register unsigned int idx = (*it).mat;

493 if (idx >= needMat.size())

494 {

495 DefaultLogger::get()->error("AC3D: material index is out of range");

496 idx = 0;

497 }

498 if ((*it).entries.empty())

499 {

500 DefaultLogger::get()->warn("AC3D: surface her zero vertex references");

501 }

502

503 // validate all vertex indices to make sure we won't crash here

504 for (it2 = (*it).entries.begin(),

505 end2 = (*it).entries.end(); it2 != end2; ++it2)

506 {

507 if ((*it2).first >= object.vertices.size())

508 {

509 DefaultLogger::get()->warn("AC3D: Invalid vertex reference");

510 (*it2).first = 0;

511 }

512 }

513

514 if (!needMat[idx].first)++node->mNumMeshes;

515

516 switch ((*it).flags & 0xf)

517 {

518 // closed line

519 case 0x1:

520

521 needMat[idx].first += (unsigned int)(*it).entries.size();

522 needMat[idx].second += (unsigned int)(*it).entries.size()<<1u;

523 break;

524

525 // unclosed line

526 case 0x2:

527

528 needMat[idx].first += (unsigned int)(*it).entries.size()-1;

529 needMat[idx].second += ((unsigned int)(*it).entries.size()-1)<<1u;

530 break;

531

532 // 0 == polygon, else unknown

533 default:

534

535 if ((*it).flags & 0xf)

536 {

537 DefaultLogger::get()->warn("AC3D: The type flag of a surface is unknown");

538 (*it).flags &= ~(0xf);

539 }

540

541 // the number of faces increments by one, the number

542 // of vertices by surface.numref.

543 needMat[idx].first++;

544 needMat[idx].second += (unsigned int)(*it).entries.size();

545 };

546 }

547 unsigned int* pip = node->mMeshes = new unsigned int[node->mNumMeshes];

548 unsigned int mat = 0;

549 const size_t oldm = meshes.size();

550 for (MatTable::const_iterator cit = needMat.begin(), cend = needMat.end();

551 cit != cend; ++cit, ++mat)

552 {

553 if (!(*cit).first)continue;

554

555 // allocate a new aiMesh object

556 *pip++ = (unsigned int)meshes.size();

557 aiMesh* mesh = new aiMesh();

558 meshes.push_back(mesh);

559

560 mesh->mMaterialIndex = (unsigned int)outMaterials.size();

561 outMaterials.push_back(new aiMaterial());

562 ConvertMaterial(object, materials[mat], *outMaterials.back());

563

564 // allocate storage for vertices and normals

565 mesh->mNumFaces = (*cit).first;

566 aiFace* faces = mesh->mFaces = new aiFace[mesh->mNumFaces];

567

568 mesh->mNumVertices = (*cit).second;

569 aiVector3D* vertices = mesh->mVertices = new aiVector3D[mesh->mNumVertices];

570 unsigned int cur = 0;

571

572 // allocate UV coordinates, but only if the texture name for the

573 // surface is not empty

574 aiVector3D* uv = NULL;

575 if(object.texture.length())

576 {

577 uv = mesh->mTextureCoords[0] = new aiVector3D[mesh->mNumVertices];

578 mesh->mNumUVComponents[0] = 2;

579 }

580

581 for (it = object.surfaces.begin(); it != end; ++it)

582 {

583 if (mat == (*it).mat)

584 {

585 const Surface& src = *it;

586

587 // closed polygon

588 unsigned int type = (*it).flags & 0xf;

589 if (!type)

590 {

591 aiFace& face = *faces++;

592 if((face.mNumIndices = (unsigned int)src.entries.size()))

593 {

594 face.mIndices = new unsigned int[face.mNumIndices];

595 for (unsigned int i = 0; i < face.mNumIndices;++i,++vertices)

596 {

597 const Surface::SurfaceEntry& entry = src.entries[i];

598 face.mIndices[i] = cur++;

599

600 // copy vertex positions

601 *vertices = object.vertices[entry.first] + object.translation;

602

603

604 // copy texture coordinates

605 if (uv)

606 {

607 uv->x = entry.second.x;

608 uv->y = entry.second.y;

609 ++uv;

610 }

611 }

612 }

613 }

614 else

615 {

616

617 it2 = (*it).entries.begin();

618

619 // either a closed or an unclosed line

620 register unsigned int tmp = (unsigned int)(*it).entries.size();

621 if (0x2 == type)--tmp;

622 for (unsigned int m = 0; m < tmp;++m)

623 {

624 aiFace& face = *faces++;

625

626 face.mNumIndices = 2;

627 face.mIndices = new unsigned int[2];

628 face.mIndices[0] = cur++;

629 face.mIndices[1] = cur++;

630

631 // copy vertex positions

632 *vertices++ = object.vertices[(*it2).first];

633

634 // copy texture coordinates

635 if (uv)

636 {

637 uv->x = (*it2).second.x;

638 uv->y = (*it2).second.y;

639 ++uv;

640 }

641

642

643 if (0x1 == type && tmp-1 == m)

644 {

645 // if this is a closed line repeat its beginning now

646 it2 = (*it).entries.begin();

647 }

648 else ++it2;

649

650 // second point

651 *vertices++ = object.vertices[(*it2).first];

652

653 if (uv)

654 {

655 uv->x = (*it2).second.x;

656 uv->y = (*it2).second.y;

657 ++uv;

658 }

659 }

660 }

661 }

662 }

663 }

664

665 // Now apply catmull clark subdivision if necessary. We split meshes into

666 // materials which is not done by AC3D during smoothing, so we need to

667 // collect all meshes using the same material group.

668 if (object.subDiv) {

669 if (configEvalSubdivision) {

670 boost::scoped_ptr<Subdivider> div(Subdivider::Create(Subdivider::CATMULL_CLARKE));

671 DefaultLogger::get()->info("AC3D: Evaluating subdivision surface: "+object.name);

672

673 std::vector<aiMesh*> cpy(meshes.size()-oldm,NULL);

674 div->Subdivide(&meshes[oldm],cpy.size(),&cpy.front(),object.subDiv,true);

675 std::copy(cpy.begin(),cpy.end(),meshes.begin()+oldm);

676

677 // previous meshes are deleted vy Subdivide().

678 }

679 else {

680 DefaultLogger::get()->info("AC3D: Letting the subdivision surface untouched due to my configuration: "

681 +object.name);

682 }

683 }

684 }

685 }

686

687 if (object.name.length())

688 node->mName.Set(object.name);

689 else

690 {

691 // generate a name depending on the type of the node

692 switch (object.type)

693 {

694 case Object::Group:

695 node->mName.length = ::sprintf(node->mName.data,"ACGroup_%i",groups++);

696 break;

697 case Object::Poly:

698 node->mName.length = ::sprintf(node->mName.data,"ACPoly_%i",polys++);

699 break;

700 case Object::Light:

701 node->mName.length = ::sprintf(node->mName.data,"ACLight_%i",lights++);

702 break;

703

704 // there shouldn't be more than one world, but we don't care

705 case Object::World:

706 node->mName.length = ::sprintf(node->mName.data,"ACWorld_%i",worlds++);

707 break;

708 }

709 }

710

711

712 // setup the local transformation matrix of the object

713 // compute the transformation offset to the parent node

714 node->mTransformation = aiMatrix4x4 ( object.rotation );

715

716 if (object.type == Object::Group || !object.numRefs)

717 {

718 node->mTransformation.a4 = object.translation.x;

719 node->mTransformation.b4 = object.translation.y;

720 node->mTransformation.c4 = object.translation.z;

721 }

722

723 // add children to the object

724 if (object.children.size())

725 {

726 node->mNumChildren = (unsigned int)object.children.size();

727 node->mChildren = new aiNode*[node->mNumChildren];

728 for (unsigned int i = 0; i < node->mNumChildren;++i)

729 {

730 node->mChildren[i] = ConvertObjectSection(object.children[i],meshes,outMaterials,materials,node);

731 }

732 }

733

734 return node;

735 }

736

737 // ------------------------------------------------------------------------------------------------

738 void AC3DImporter::SetupProperties(const Importer* pImp)

739 {

740 configSplitBFCull = pImp->GetPropertyInteger(AI_CONFIG_IMPORT_AC_SEPARATE_BFCULL,1) ? true : false;

741 configEvalSubdivision = pImp->GetPropertyInteger(AI_CONFIG_IMPORT_AC_EVAL_SUBDIVISION,1) ? true : false;

742 }

743

744 // ------------------------------------------------------------------------------------------------

745 // Imports the given file into the given scene structure.

746 void AC3DImporter::InternReadFile( const std::string& pFile,

747 aiScene* pScene, IOSystem* pIOHandler)

748 {

749 boost::scoped_ptr<IOStream> file( pIOHandler->Open( pFile, "rb"));

750

751 // Check whether we can read from the file

752 if( file.get() == NULL)

753 throw DeadlyImportError( "Failed to open AC3D file " + pFile + ".");

754

755 // allocate storage and copy the contents of the file to a memory buffer

756 std::vector<char> mBuffer2;

757 TextFileToBuffer(file.get(),mBuffer2);

758

759 buffer = &mBuffer2[0];

760 mNumMeshes = 0;

761

762 lights = polys = worlds = groups = 0;

763

764 if (::strncmp(buffer,"AC3D",4)) {

765 throw DeadlyImportError("AC3D: No valid AC3D file, magic sequence not found");

766 }

767

768 // print the file format version to the console

769 unsigned int version = HexDigitToDecimal( buffer[4] );

770 char msg[3];

771 ASSIMP_itoa10(msg,3,version);

772 DefaultLogger::get()->info(std::string("AC3D file format version: ") + msg);

773

774 std::vector<Material> materials;

775 materials.reserve(5);

776

777 std::vector<Object> rootObjects;

778 rootObjects.reserve(5);

779

780 std::vector<aiLight*> lights;

781 mLights = & lights;

782

783 while (GetNextLine())

784 {

785 if (TokenMatch(buffer,"MATERIAL",8))

786 {

787 materials.push_back(Material());

788 Material& mat = materials.back();

789

790 // manually parse the material ... sscanf would use the buldin atof ...

791 // Format: (name) rgb %f %f %f amb %f %f %f emis %f %f %f spec %f %f %f shi %d trans %f

792

793 AI_AC_SKIP_TO_NEXT_TOKEN();

794 if ('\"' == *buffer)

795 {

796 AI_AC_GET_STRING(mat.name);

797 AI_AC_SKIP_TO_NEXT_TOKEN();

798 }

799

800 AI_AC_CHECKED_LOAD_FLOAT_ARRAY("rgb",3,3,&mat.rgb);

801 AI_AC_CHECKED_LOAD_FLOAT_ARRAY("amb",3,3,&mat.amb);

802 AI_AC_CHECKED_LOAD_FLOAT_ARRAY("emis",4,3,&mat.emis);

803 AI_AC_CHECKED_LOAD_FLOAT_ARRAY("spec",4,3,&mat.spec);

804 AI_AC_CHECKED_LOAD_FLOAT_ARRAY("shi",3,1,&mat.shin);

805 AI_AC_CHECKED_LOAD_FLOAT_ARRAY("trans",5,1,&mat.trans);

806 }

807 LoadObjectSection(rootObjects);

808 }

809

810 if (rootObjects.empty() || !mNumMeshes)

811 {

812 throw DeadlyImportError("AC3D: No meshes have been loaded");

813 }

814 if (materials.empty())

815 {

816 DefaultLogger::get()->warn("AC3D: No material has been found");

817 materials.push_back(Material());

818 }

819

820 mNumMeshes += (mNumMeshes>>2u) + 1;

821 std::vector<aiMesh*> meshes;

822 meshes.reserve(mNumMeshes);

823

824 std::vector<aiMaterial*> omaterials;

825 materials.reserve(mNumMeshes);

826

827 // generate a dummy root if there are multiple objects on the top layer

828 Object* root;

829 if (1 == rootObjects.size())

830 root = &rootObjects[0];

831 else

832 {

833 root = new Object();

834 }

835

836 // now convert the imported stuff to our output data structure

837 pScene->mRootNode = ConvertObjectSection(*root,meshes,omaterials,materials);

838 if (1 != rootObjects.size())delete root;

839

840 if (!::strncmp( pScene->mRootNode->mName.data, "Node", 4))

841 pScene->mRootNode->mName.Set("<AC3DWorld>");

842

843 // copy meshes

844 if (meshes.empty())

845 {

846 throw DeadlyImportError("An unknown error occured during converting");

847 }

848 pScene->mNumMeshes = (unsigned int)meshes.size();

849 pScene->mMeshes = new aiMesh*[pScene->mNumMeshes];

850 ::memcpy(pScene->mMeshes,&meshes[0],pScene->mNumMeshes*sizeof(void*));

851

852 // copy materials

853 pScene->mNumMaterials = (unsigned int)omaterials.size();

854 pScene->mMaterials = new aiMaterial*[pScene->mNumMaterials];

855 ::memcpy(pScene->mMaterials,&omaterials[0],pScene->mNumMaterials*sizeof(void*));

856

857 // copy lights

858 pScene->mNumLights = (unsigned int)lights.size();

859 if (lights.size())

860 {

861 pScene->mLights = new aiLight*[lights.size()];

862 ::memcpy(pScene->mLights,&lights[0],lights.size()*sizeof(void*));

863 }

864 }

865

866 #endif //!defined ASSIMP_BUILD_NO_AC_IMPORTER