vrshoot: c179c72369be libs/assimp/B3DImporter.cpp

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view libs/assimp/B3DImporter.cpp @ 3:c179c72369be

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author	John Tsiombikas <nuclear@member.fsf.org>
date	Mon, 03 Feb 2014 08:52:13 +0200
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1 /*

2 ---------------------------------------------------------------------------

3 Open Asset Import Library (assimp)

4 ---------------------------------------------------------------------------

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

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

12 conditions are met:

14 * Redistributions of source code must retain the above

15 copyright notice, this list of conditions and the

16 following disclaimer.

18 * Redistributions in binary form must reproduce the above

19 copyright notice, this list of conditions and the

20 following disclaimer in the documentation and/or other

21 materials provided with the distribution.

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

24 contributors may be used to endorse or promote products

25 derived from this software without specific prior

26 written permission of the assimp team.

28 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

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

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

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

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

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

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

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

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

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

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

39 ---------------------------------------------------------------------------

40 */

42 /** @file B3DImporter.cpp

43 * @brief Implementation of the b3d importer class

44 */

46 #include "AssimpPCH.h"

47 #ifndef ASSIMP_BUILD_NO_B3D_IMPORTER

49 // internal headers

50 #include "B3DImporter.h"

51 #include "TextureTransform.h"

52 #include "ConvertToLHProcess.h"

54 using namespace Assimp;

55 using namespace std;

57 static const aiImporterDesc desc = {

58 "BlitzBasic 3D Importer",

59 "",

60 "",

61 "http://www.blitzbasic.com/",

62 aiImporterFlags_SupportBinaryFlavour,

63 0,

64 0,

65 0,

66 0,

67 "b3d"

68 };

70 // (fixme, Aramis) quick workaround to get rid of all those signed to unsigned warnings

71 #ifdef _MSC_VER

72 # pragma warning (disable: 4018)

73 #endif

75 //#define DEBUG_B3D

77 // ------------------------------------------------------------------------------------------------

78 bool B3DImporter::CanRead( const std::string& pFile, IOSystem* /*pIOHandler*/, bool /*checkSig*/) const{

80 size_t pos=pFile.find_last_of( '.' );

81 if( pos==string::npos ) return false;

83 string ext=pFile.substr( pos+1 );

84 if( ext.size()!=3 ) return false;

86 return (ext[0]=='b' || ext[0]=='B') && (ext[1]=='3') && (ext[2]=='d' || ext[2]=='D');

87 }

89 // ------------------------------------------------------------------------------------------------

90 // Loader meta information

91 const aiImporterDesc* B3DImporter::GetInfo () const

92 {

93 return &desc;

94 }

96 #ifdef DEBUG_B3D

97 extern "C"{ void _stdcall AllocConsole(); }

98 #endif

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

100 void B3DImporter::InternReadFile( const std::string& pFile, aiScene* pScene, IOSystem* pIOHandler){

101

102 #ifdef DEBUG_B3D

103 AllocConsole();

104 freopen( "conin$","r",stdin );

105 freopen( "conout$","w",stdout );

106 freopen( "conout$","w",stderr );

107 cout<<"Hello world from the B3DImporter!"<<endl;

108 #endif

109

110 boost::scoped_ptr<IOStream> file( pIOHandler->Open( pFile));

111

112 // Check whether we can read from the file

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

114 throw DeadlyImportError( "Failed to open B3D file " + pFile + ".");

115

116 // check whether the .b3d file is large enough to contain

117 // at least one chunk.

118 size_t fileSize = file->FileSize();

119 if( fileSize<8 ) throw DeadlyImportError( "B3D File is too small.");

120

121 _pos=0;

122 _buf.resize( fileSize );

123 file->Read( &_buf[0],1,fileSize );

124 _stack.clear();

125

126 ReadBB3D( pScene );

127 }

128

129 // ------------------------------------------------------------------------------------------------

130 void B3DImporter::Oops(){

131 throw DeadlyImportError( "B3D Importer - INTERNAL ERROR" );

132 }

133

134 // ------------------------------------------------------------------------------------------------

135 void B3DImporter::Fail( string str ){

136 #ifdef DEBUG_B3D

137 cout<<"Error in B3D file data: "<<str<<endl;

138 #endif

139 throw DeadlyImportError( "B3D Importer - error in B3D file data: "+str );

140 }

141

142 // ------------------------------------------------------------------------------------------------

143 int B3DImporter::ReadByte(){

144 if( _pos<_buf.size() ) return _buf[_pos++];

145 Fail( "EOF" );

146 return 0;

147 }

148

149 // ------------------------------------------------------------------------------------------------

150 int B3DImporter::ReadInt(){

151 if( _pos+4<=_buf.size() ){

152 int n=*(int*)&_buf[_pos];

153 _pos+=4;

154 return n;

155 }

156 Fail( "EOF" );

157 return 0;

158 }

159

160 // ------------------------------------------------------------------------------------------------

161 float B3DImporter::ReadFloat(){

162 if( _pos+4<=_buf.size() ){

163 float n=*(float*)&_buf[_pos];

164 _pos+=4;

165 return n;

166 }

167 Fail( "EOF" );

168 return 0.0f;

169 }

170

171 // ------------------------------------------------------------------------------------------------

172 aiVector2D B3DImporter::ReadVec2(){

173 float x=ReadFloat();

174 float y=ReadFloat();

175 return aiVector2D( x,y );

176 }

177

178 // ------------------------------------------------------------------------------------------------

179 aiVector3D B3DImporter::ReadVec3(){

180 float x=ReadFloat();

181 float y=ReadFloat();

182 float z=ReadFloat();

183 return aiVector3D( x,y,z );

184 }

185

186 // ------------------------------------------------------------------------------------------------

187 aiQuaternion B3DImporter::ReadQuat(){

188 // (aramis_acg) Fix to adapt the loader to changed quat orientation

189 float w=-ReadFloat();

190 float x=ReadFloat();

191 float y=ReadFloat();

192 float z=ReadFloat();

193 return aiQuaternion( w,x,y,z );

194 }

195

196 // ------------------------------------------------------------------------------------------------

197 string B3DImporter::ReadString(){

198 string str;

199 while( _pos<_buf.size() ){

200 char c=(char)ReadByte();

201 if( !c ) return str;

202 str+=c;

203 }

204 Fail( "EOF" );

205 return string();

206 }

207

208 // ------------------------------------------------------------------------------------------------

209 string B3DImporter::ReadChunk(){

210 string tag;

211 for( int i=0;i<4;++i ){

212 tag+=char( ReadByte() );

213 }

214 #ifdef DEBUG_B3D

215 // cout<<"ReadChunk:"<<tag<<endl;

216 #endif

217 unsigned sz=(unsigned)ReadInt();

218 _stack.push_back( _pos+sz );

219 return tag;

220 }

221

222 // ------------------------------------------------------------------------------------------------

223 void B3DImporter::ExitChunk(){

224 _pos=_stack.back();

225 _stack.pop_back();

226 }

227

228 // ------------------------------------------------------------------------------------------------

229 unsigned B3DImporter::ChunkSize(){

230 return _stack.back()-_pos;

231 }

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

233

234 template<class T>

235 T *B3DImporter::to_array( const vector<T> &v ){

236 if( !v.size() ) return 0;

237 T *p=new T[v.size()];

238 for( size_t i=0;i<v.size();++i ){

239 p[i]=v[i];

240 }

241 return p;

242 }

243

244 // ------------------------------------------------------------------------------------------------

245 void B3DImporter::ReadTEXS(){

246 while( ChunkSize() ){

247 string name=ReadString();

248 /*int flags=*/ReadInt();

249 /*int blend=*/ReadInt();

250 /*aiVector2D pos=*/ReadVec2();

251 /*aiVector2D scale=*/ReadVec2();

252 /*float rot=*/ReadFloat();

253

254 _textures.push_back( name );

255 }

256 }

257

258 // ------------------------------------------------------------------------------------------------

259 void B3DImporter::ReadBRUS(){

260 int n_texs=ReadInt();

261 if( n_texs<0 || n_texs>8 ){

262 Fail( "Bad texture count" );

263 }

264 while( ChunkSize() ){

265 string name=ReadString();

266 aiVector3D color=ReadVec3();

267 float alpha=ReadFloat();

268 float shiny=ReadFloat();

269 /*int blend=**/ReadInt();

270 int fx=ReadInt();

271

272 aiMaterial *mat=new aiMaterial;

273 _materials.push_back( mat );

274

275 // Name

276 aiString ainame( name );

277 mat->AddProperty( &ainame,AI_MATKEY_NAME );

278

279 // Diffuse color

280 mat->AddProperty( &color,1,AI_MATKEY_COLOR_DIFFUSE );

281

282 // Opacity

283 mat->AddProperty( &alpha,1,AI_MATKEY_OPACITY );

284

285 // Specular color

286 aiColor3D speccolor( shiny,shiny,shiny );

287 mat->AddProperty( &speccolor,1,AI_MATKEY_COLOR_SPECULAR );

288

289 // Specular power

290 float specpow=shiny*128;

291 mat->AddProperty( &specpow,1,AI_MATKEY_SHININESS );

292

293 // Double sided

294 if( fx & 0x10 ){

295 int i=1;

296 mat->AddProperty( &i,1,AI_MATKEY_TWOSIDED );

297 }

298

299 //Textures

300 for( int i=0;i<n_texs;++i ){

301 int texid=ReadInt();

302 if( texid<-1 || (texid>=0 && texid>=static_cast<int>(_textures.size())) ){

303 Fail( "Bad texture id" );

304 }

305 if( i==0 && texid>=0 ){

306 aiString texname( _textures[texid] );

307 mat->AddProperty( &texname,AI_MATKEY_TEXTURE_DIFFUSE(0) );

308 }

309 }

310 }

311 }

312

313 // ------------------------------------------------------------------------------------------------

314 void B3DImporter::ReadVRTS(){

315 _vflags=ReadInt();

316 _tcsets=ReadInt();

317 _tcsize=ReadInt();

318 if( _tcsets<0 || _tcsets>4 || _tcsize<0 || _tcsize>4 ){

319 Fail( "Bad texcoord data" );

320 }

321

322 int sz=12+(_vflags&1?12:0)+(_vflags&2?16:0)+(_tcsets*_tcsize*4);

323 int n_verts=ChunkSize()/sz;

324

325 int v0=_vertices.size();

326 _vertices.resize( v0+n_verts );

327

328 for( int i=0;i<n_verts;++i ){

329 Vertex &v=_vertices[v0+i];

330

331 memset( v.bones,0,sizeof(v.bones) );

332 memset( v.weights,0,sizeof(v.weights) );

333

334 v.vertex=ReadVec3();

335

336 if( _vflags & 1 ) v.normal=ReadVec3();

337

338 if( _vflags & 2 ) ReadQuat(); //skip v 4bytes...

339

340 for( int i=0;i<_tcsets;++i ){

341 float t[4]={0,0,0,0};

342 for( int j=0;j<_tcsize;++j ){

343 t[j]=ReadFloat();

344 }

345 t[1]=1-t[1];

346 if( !i ) v.texcoords=aiVector3D( t[0],t[1],t[2] );

347 }

348 }

349 }

350

351 // ------------------------------------------------------------------------------------------------

352 void B3DImporter::ReadTRIS( int v0 ){

353 int matid=ReadInt();

354 if( matid==-1 ){

355 matid=0;

356 }else if( matid<0 || matid>=(int)_materials.size() ){

357 #ifdef DEBUG_B3D

358 cout<<"material id="<<matid<<endl;

359 #endif

360 Fail( "Bad material id" );

361 }

362

363 aiMesh *mesh=new aiMesh;

364 _meshes.push_back( mesh );

365

366 mesh->mMaterialIndex=matid;

367 mesh->mNumFaces=0;

368 mesh->mPrimitiveTypes=aiPrimitiveType_TRIANGLE;

369

370 int n_tris=ChunkSize()/12;

371 aiFace *face=mesh->mFaces=new aiFace[n_tris];

372

373 for( int i=0;i<n_tris;++i ){

374 int i0=ReadInt()+v0;

375 int i1=ReadInt()+v0;

376 int i2=ReadInt()+v0;

377 if( i0<0 || i0>=(int)_vertices.size() || i1<0 || i1>=(int)_vertices.size() || i2<0 || i2>=(int)_vertices.size() ){

378 #ifdef DEBUG_B3D

379 cout<<"Bad triangle index: i0="<<i0<<", i1="<<i1<<", i2="<<i2<<endl;

380 #endif

381 Fail( "Bad triangle index" );

382 continue;

383 }

384 face->mNumIndices=3;

385 face->mIndices=new unsigned[3];

386 face->mIndices[0]=i0;

387 face->mIndices[1]=i1;

388 face->mIndices[2]=i2;

389 ++mesh->mNumFaces;

390 ++face;

391 }

392 }

393

394 // ------------------------------------------------------------------------------------------------

395 void B3DImporter::ReadMESH(){

396 /*int matid=*/ReadInt();

397

398 int v0=_vertices.size();

399

400 while( ChunkSize() ){

401 string t=ReadChunk();

402 if( t=="VRTS" ){

403 ReadVRTS();

404 }else if( t=="TRIS" ){

405 ReadTRIS( v0 );

406 }

407 ExitChunk();

408 }

409 }

410

411 // ------------------------------------------------------------------------------------------------

412 void B3DImporter::ReadBONE( int id ){

413 while( ChunkSize() ){

414 int vertex=ReadInt();

415 float weight=ReadFloat();

416 if( vertex<0 || vertex>=(int)_vertices.size() ){

417 Fail( "Bad vertex index" );

418 }

419

420 Vertex &v=_vertices[vertex];

421 int i;

422 for( i=0;i<4;++i ){

423 if( !v.weights[i] ){

424 v.bones[i]=id;

425 v.weights[i]=weight;

426 break;

427 }

428 }

429 #ifdef DEBUG_B3D

430 if( i==4 ){

431 cout<<"Too many bone weights"<<endl;

432 }

433 #endif

434 }

435 }

436

437 // ------------------------------------------------------------------------------------------------

438 void B3DImporter::ReadKEYS( aiNodeAnim *nodeAnim ){

439 vector<aiVectorKey> trans,scale;

440 vector<aiQuatKey> rot;

441 int flags=ReadInt();

442 while( ChunkSize() ){

443 int frame=ReadInt();

444 if( flags & 1 ){

445 trans.push_back( aiVectorKey( frame,ReadVec3() ) );

446 }

447 if( flags & 2 ){

448 scale.push_back( aiVectorKey( frame,ReadVec3() ) );

449 }

450 if( flags & 4 ){

451 rot.push_back( aiQuatKey( frame,ReadQuat() ) );

452 }

453 }

454

455 if( flags & 1 ){

456 nodeAnim->mNumPositionKeys=trans.size();

457 nodeAnim->mPositionKeys=to_array( trans );

458 }

459

460 if( flags & 2 ){

461 nodeAnim->mNumScalingKeys=scale.size();

462 nodeAnim->mScalingKeys=to_array( scale );

463 }

464

465 if( flags & 4 ){

466 nodeAnim->mNumRotationKeys=rot.size();

467 nodeAnim->mRotationKeys=to_array( rot );

468 }

469 }

470

471 // ------------------------------------------------------------------------------------------------

472 void B3DImporter::ReadANIM(){

473 /*int flags=*/ReadInt();

474 int frames=ReadInt();

475 float fps=ReadFloat();

476

477 aiAnimation *anim=new aiAnimation;

478 _animations.push_back( anim );

479

480 anim->mDuration=frames;

481 anim->mTicksPerSecond=fps;

482 }

483

484 // ------------------------------------------------------------------------------------------------

485 aiNode *B3DImporter::ReadNODE( aiNode *parent ){

486

487 string name=ReadString();

488 aiVector3D t=ReadVec3();

489 aiVector3D s=ReadVec3();

490 aiQuaternion r=ReadQuat();

491

492 aiMatrix4x4 trans,scale,rot;

493

494 aiMatrix4x4::Translation( t,trans );

495 aiMatrix4x4::Scaling( s,scale );

496 rot=aiMatrix4x4( r.GetMatrix() );

497

498 aiMatrix4x4 tform=trans * rot * scale;

499

500 int nodeid=_nodes.size();

501

502 aiNode *node=new aiNode( name );

503 _nodes.push_back( node );

504

505 node->mParent=parent;

506 node->mTransformation=tform;

507

508 aiNodeAnim *nodeAnim=0;

509 vector<unsigned> meshes;

510 vector<aiNode*> children;

511

512 while( ChunkSize() ){

513 string t=ReadChunk();

514 if( t=="MESH" ){

515 int n=_meshes.size();

516 ReadMESH();

517 for( int i=n;i<(int)_meshes.size();++i ){

518 meshes.push_back( i );

519 }

520 }else if( t=="BONE" ){

521 ReadBONE( nodeid );

522 }else if( t=="ANIM" ){

523 ReadANIM();

524 }else if( t=="KEYS" ){

525 if( !nodeAnim ){

526 nodeAnim=new aiNodeAnim;

527 _nodeAnims.push_back( nodeAnim );

528 nodeAnim->mNodeName=node->mName;

529 }

530 ReadKEYS( nodeAnim );

531 }else if( t=="NODE" ){

532 aiNode *child=ReadNODE( node );

533 children.push_back( child );

534 }

535 ExitChunk();

536 }

537

538 node->mNumMeshes=meshes.size();

539 node->mMeshes=to_array( meshes );

540

541 node->mNumChildren=children.size();

542 node->mChildren=to_array( children );

543

544 return node;

545 }

546

547 // ------------------------------------------------------------------------------------------------

548 void B3DImporter::ReadBB3D( aiScene *scene ){

549

550 _textures.clear();

551 _materials.size();

552

553 _vertices.clear();

554 _meshes.clear();

555

556 _nodes.clear();

557 _nodeAnims.clear();

558 _animations.clear();

559

560 string t=ReadChunk();

561 if( t=="BB3D" ){

562 int version=ReadInt();

563

564 if (!DefaultLogger::isNullLogger()) {

565 char dmp[128];

566 sprintf(dmp,"B3D file format version: %i",version);

567 DefaultLogger::get()->info(dmp);

568 }

569

570 while( ChunkSize() ){

571 string t=ReadChunk();

572 if( t=="TEXS" ){

573 ReadTEXS();

574 }else if( t=="BRUS" ){

575 ReadBRUS();

576 }else if( t=="NODE" ){

577 ReadNODE( 0 );

578 }

579 ExitChunk();

580 }

581 }

582 ExitChunk();

583

584 if( !_nodes.size() ) Fail( "No nodes" );

585

586 if( !_meshes.size() ) Fail( "No meshes" );

587

588 //Fix nodes/meshes/bones

589 for(size_t i=0;i<_nodes.size();++i ){

590 aiNode *node=_nodes[i];

591

592 for( size_t j=0;j<node->mNumMeshes;++j ){

593 aiMesh *mesh=_meshes[node->mMeshes[j]];

594

595 int n_tris=mesh->mNumFaces;

596 int n_verts=mesh->mNumVertices=n_tris * 3;

597

598 aiVector3D *mv=mesh->mVertices=new aiVector3D[ n_verts ],*mn=0,*mc=0;

599 if( _vflags & 1 ) mn=mesh->mNormals=new aiVector3D[ n_verts ];

600 if( _tcsets ) mc=mesh->mTextureCoords[0]=new aiVector3D[ n_verts ];

601

602 aiFace *face=mesh->mFaces;

603

604 vector< vector<aiVertexWeight> > vweights( _nodes.size() );

605

606 for( int i=0;i<n_verts;i+=3 ){

607 for( int j=0;j<3;++j ){

608 Vertex &v=_vertices[face->mIndices[j]];

609

610 *mv++=v.vertex;

611 if( mn ) *mn++=v.normal;

612 if( mc ) *mc++=v.texcoords;

613

614 face->mIndices[j]=i+j;

615

616 for( int k=0;k<4;++k ){

617 if( !v.weights[k] ) break;

618

619 int bone=v.bones[k];

620 float weight=v.weights[k];

621

622 vweights[bone].push_back( aiVertexWeight(i+j,weight) );

623 }

624 }

625 ++face;

626 }

627

628 vector<aiBone*> bones;

629 for(size_t i=0;i<vweights.size();++i ){

630 vector<aiVertexWeight> &weights=vweights[i];

631 if( !weights.size() ) continue;

632

633 aiBone *bone=new aiBone;

634 bones.push_back( bone );

635

636 aiNode *bnode=_nodes[i];

637

638 bone->mName=bnode->mName;

639 bone->mNumWeights=weights.size();

640 bone->mWeights=to_array( weights );

641

642 aiMatrix4x4 mat=bnode->mTransformation;

643 while( bnode->mParent ){

644 bnode=bnode->mParent;

645 mat=bnode->mTransformation * mat;

646 }

647 bone->mOffsetMatrix=mat.Inverse();

648 }

649 mesh->mNumBones=bones.size();

650 mesh->mBones=to_array( bones );

651 }

652 }

653

654 //nodes

655 scene->mRootNode=_nodes[0];

656

657 //material

658 if( !_materials.size() ){

659 _materials.push_back( new aiMaterial );

660 }

661 scene->mNumMaterials=_materials.size();

662 scene->mMaterials=to_array( _materials );

663

664 //meshes

665 scene->mNumMeshes=_meshes.size();

666 scene->mMeshes=to_array( _meshes );

667

668 //animations

669 if( _animations.size()==1 && _nodeAnims.size() ){

670

671 aiAnimation *anim=_animations.back();

672 anim->mNumChannels=_nodeAnims.size();

673 anim->mChannels=to_array( _nodeAnims );

674

675 scene->mNumAnimations=_animations.size();

676 scene->mAnimations=to_array( _animations );

677 }

678

679 // convert to RH

680 MakeLeftHandedProcess makeleft;

681 makeleft.Execute( scene );

682

683 FlipWindingOrderProcess flip;

684 flip.Execute( scene );

685 }

686

687 #endif // !! ASSIMP_BUILD_NO_B3D_IMPORTER