diff options
author | Sarah Smith <sarah.j.smith@nokia.com> | 2011-03-09 17:08:07 +1000 |
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committer | Sarah Smith <sarah.j.smith@nokia.com> | 2011-03-09 17:43:07 +1000 |
commit | b87a08f5292069facf9b427cb43a675d43578293 (patch) | |
tree | af3efc8960a3e556e15b7b66f81821b01297c366 /3rdparty/assimp/code/LWOLoader.cpp |
Add files ported from research/qt3d
Fill repo with some of the files from the research/qt3d project. At
present the new project builds under MacOSX. To-dos include getting it
building under linux, windows, harmattan and maemo/meego; updating the
documentation to reflect the new QtQuick focus; and fixing the issues
with private headers.
Diffstat (limited to '3rdparty/assimp/code/LWOLoader.cpp')
-rw-r--r-- | 3rdparty/assimp/code/LWOLoader.cpp | 1403 |
1 files changed, 1403 insertions, 0 deletions
diff --git a/3rdparty/assimp/code/LWOLoader.cpp b/3rdparty/assimp/code/LWOLoader.cpp new file mode 100644 index 000000000..b19ffe698 --- /dev/null +++ b/3rdparty/assimp/code/LWOLoader.cpp @@ -0,0 +1,1403 @@ +/* +--------------------------------------------------------------------------- +Open Asset Import Library (ASSIMP) +--------------------------------------------------------------------------- + +Copyright (c) 2006-2010, ASSIMP Development Team + +All rights reserved. + +Redistribution and use of this software in source and binary forms, +with or without modification, are permitted provided that the following +conditions are met: + +* Redistributions of source code must retain the above + copyright notice, this list of conditions and the + following disclaimer. + +* Redistributions in binary form must reproduce the above + copyright notice, this list of conditions and the + following disclaimer in the documentation and/or other + materials provided with the distribution. + +* Neither the name of the ASSIMP team, nor the names of its + contributors may be used to endorse or promote products + derived from this software without specific prior + written permission of the ASSIMP Development Team. + +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +--------------------------------------------------------------------------- +*/ + +/** @file LWOLoader.cpp + * @brief Implementation of the LWO importer class + */ + +#include "AssimpPCH.h" +#ifndef ASSIMP_BUILD_NO_LWO_IMPORTER + +// internal headers +#include "LWOLoader.h" +#include "MaterialSystem.h" +#include "StringComparison.h" +#include "SGSpatialSort.h" +#include "ByteSwap.h" +#include "ProcessHelper.h" +#include "ConvertToLHProcess.h" + +using namespace Assimp; + +// ------------------------------------------------------------------------------------------------ +// Constructor to be privately used by Importer +LWOImporter::LWOImporter() +{} + +// ------------------------------------------------------------------------------------------------ +// Destructor, private as well +LWOImporter::~LWOImporter() +{} + +// ------------------------------------------------------------------------------------------------ +// Returns whether the class can handle the format of the given file. +bool LWOImporter::CanRead( const std::string& pFile, IOSystem* pIOHandler, bool checkSig) const +{ + const std::string extension = GetExtension(pFile); + if (extension == "lwo" || extension == "lxo") + return true; + + // if check for extension is not enough, check for the magic tokens + if (!extension.length() || checkSig) { + uint32_t tokens[3]; + tokens[0] = AI_LWO_FOURCC_LWOB; + tokens[1] = AI_LWO_FOURCC_LWO2; + tokens[2] = AI_LWO_FOURCC_LXOB; + return CheckMagicToken(pIOHandler,pFile,tokens,3,8); + } + return false; +} + +// ------------------------------------------------------------------------------------------------ +// Setup configuration properties +void LWOImporter::SetupProperties(const Importer* pImp) +{ + configSpeedFlag = ( 0 != pImp->GetPropertyInteger(AI_CONFIG_FAVOUR_SPEED,0) ? true : false); + configLayerIndex = pImp->GetPropertyInteger (AI_CONFIG_IMPORT_LWO_ONE_LAYER_ONLY,0xffffffff); + configLayerName = pImp->GetPropertyString (AI_CONFIG_IMPORT_LWO_ONE_LAYER_ONLY,""); +} + +// ------------------------------------------------------------------------------------------------ +// Imports the given file into the given scene structure. +void LWOImporter::InternReadFile( const std::string& pFile, + aiScene* pScene, + IOSystem* pIOHandler) +{ + boost::scoped_ptr<IOStream> file( pIOHandler->Open( pFile, "rb")); + + // Check whether we can read from the file + if ( file.get() == NULL) + throw DeadlyImportError( "Failed to open LWO file " + pFile + "."); + + if ((this->fileSize = (unsigned int)file->FileSize()) < 12) + throw DeadlyImportError("LWO: The file is too small to contain the IFF header"); + + // Allocate storage and copy the contents of the file to a memory buffer + std::vector< uint8_t > mBuffer(fileSize); + file->Read( &mBuffer[0], 1, fileSize); + this->pScene = pScene; + + // Determine the type of the file + uint32_t fileType; + const char* sz = IFF::ReadHeader(&mBuffer[0],fileType); + if (sz)throw DeadlyImportError(sz); + + mFileBuffer = &mBuffer[0] + 12; + fileSize -= 12; + + // Initialize some members with their default values + hasNamedLayer = false; + + // Create temporary storage on the stack but store pointers to it in the class + // instance. Therefore everything will be destructed properly if an exception + // is thrown and we needn't take care of that. + LayerList _mLayers; + SurfaceList _mSurfaces; + TagList _mTags; + TagMappingTable _mMapping; + + mLayers = &_mLayers; + mTags = &_mTags; + mMapping = &_mMapping; + mSurfaces = &_mSurfaces; + + // Allocate a default layer (layer indices are 1-based from now) + mLayers->push_back(Layer()); + mCurLayer = &mLayers->back(); + mCurLayer->mName = "<LWODefault>"; + + // old lightwave file format (prior to v6) + if (AI_LWO_FOURCC_LWOB == fileType) { + DefaultLogger::get()->info("LWO file format: LWOB (<= LightWave 5.5)"); + + mIsLWO2 = false; + mIsLXOB = false; + LoadLWOBFile(); + } + // New lightwave format + else if (AI_LWO_FOURCC_LWO2 == fileType) { + mIsLXOB = false; + DefaultLogger::get()->info("LWO file format: LWO2 (>= LightWave 6)"); + } + // MODO file format + else if (AI_LWO_FOURCC_LXOB == fileType) { + mIsLXOB = true; + DefaultLogger::get()->info("LWO file format: LXOB (Modo)"); + } + // we don't know this format + else + { + char szBuff[5]; + szBuff[0] = (char)(fileType >> 24u); + szBuff[1] = (char)(fileType >> 16u); + szBuff[2] = (char)(fileType >> 8u); + szBuff[3] = (char)(fileType); + szBuff[4] = '\0'; + throw DeadlyImportError(std::string("Unknown LWO sub format: ") + szBuff); + } + + if (AI_LWO_FOURCC_LWOB != fileType) { + mIsLWO2 = true; + LoadLWO2File(); + + // The newer lightwave format allows the user to configure the + // loader that just one layer is used. If this is the case + // we need to check now whether the requested layer has been found. + if (0xffffffff != configLayerIndex && configLayerIndex > mLayers->size()) + throw DeadlyImportError("LWO2: The requested layer was not found"); + + if (configLayerName.length() && !hasNamedLayer) { + throw DeadlyImportError("LWO2: Unable to find the requested layer: " + + configLayerName); + } + } + + // now, as we have loaded all data, we can resolve cross-referenced tags and clips + ResolveTags(); + ResolveClips(); + + // now process all layers and build meshes and nodes + std::vector<aiMesh*> apcMeshes; + std::vector<aiNode*> apcNodes; + apcNodes. reserve(mLayers->size()); + apcMeshes.reserve(mLayers->size()*std::min(((unsigned int)mSurfaces->size()/2u), 1u)); + + unsigned int iDefaultSurface = 0xffffffff; // index of the default surface + for (LayerList::iterator lit = mLayers->begin(), lend = mLayers->end();lit != lend;++lit) { + LWO::Layer& layer = *lit; + if (layer.skip) + continue; + + // I don't know whether there could be dummy layers, but it would be possible + const unsigned int meshStart = (unsigned int)apcMeshes.size(); + if (!layer.mFaces.empty() && !layer.mTempPoints.empty()) { + + // now sort all faces by the surfaces assigned to them + std::vector<SortedRep> pSorted(mSurfaces->size()+1); + + unsigned int i = 0; + for (FaceList::iterator it = layer.mFaces.begin(), end = layer.mFaces.end();it != end;++it,++i) { + // Check whether we support this face's type + if ((*it).type != AI_LWO_FACE && (*it).type != AI_LWO_PTCH && + (*it).type != AI_LWO_BONE && (*it).type != AI_LWO_SUBD) { + continue; + } + + unsigned int idx = (*it).surfaceIndex; + if (idx >= mTags->size()) + { + DefaultLogger::get()->warn("LWO: Invalid face surface index"); + idx = 0xffffffff; + } + if (0xffffffff == idx || 0xffffffff == (idx = _mMapping[idx])) { + if (0xffffffff == iDefaultSurface) { + iDefaultSurface = (unsigned int)mSurfaces->size(); + mSurfaces->push_back(LWO::Surface()); + LWO::Surface& surf = mSurfaces->back(); + surf.mColor.r = surf.mColor.g = surf.mColor.b = 0.6f; + surf.mName = "LWODefaultSurface"; + } + idx = iDefaultSurface; + } + pSorted[idx].push_back(i); + } + if (0xffffffff == iDefaultSurface) { + pSorted.erase(pSorted.end()-1); + } + for (unsigned int p = 0,i = 0;i < mSurfaces->size();++i) { + SortedRep& sorted = pSorted[i]; + if (sorted.empty()) + continue; + + // generate the mesh + aiMesh* mesh = new aiMesh(); + apcMeshes.push_back(mesh); + mesh->mNumFaces = (unsigned int)sorted.size(); + + // count the number of vertices + SortedRep::const_iterator it = sorted.begin(), end = sorted.end(); + for (;it != end;++it) { + mesh->mNumVertices += layer.mFaces[*it].mNumIndices; + } + + aiVector3D *nrm = NULL, * pv = mesh->mVertices = new aiVector3D[mesh->mNumVertices]; + aiFace* pf = mesh->mFaces = new aiFace[mesh->mNumFaces]; + mesh->mMaterialIndex = i; + + // find out which vertex color channels and which texture coordinate + // channels are really required by the material attached to this mesh + unsigned int vUVChannelIndices[AI_MAX_NUMBER_OF_TEXTURECOORDS]; + unsigned int vVColorIndices[AI_MAX_NUMBER_OF_COLOR_SETS]; + +#if _DEBUG + for (unsigned int mui = 0; mui < AI_MAX_NUMBER_OF_TEXTURECOORDS;++mui ) + vUVChannelIndices[mui] = 0xffffffff; + for (unsigned int mui = 0; mui < AI_MAX_NUMBER_OF_COLOR_SETS;++mui ) + vVColorIndices[mui] = 0xffffffff; +#endif + + FindUVChannels(_mSurfaces[i],sorted,layer,vUVChannelIndices); + FindVCChannels(_mSurfaces[i],sorted,layer,vVColorIndices); + + // allocate storage for UV and CV channels + aiVector3D* pvUV[AI_MAX_NUMBER_OF_TEXTURECOORDS]; + for (unsigned int mui = 0; mui < AI_MAX_NUMBER_OF_TEXTURECOORDS;++mui ) { + if (0xffffffff == vUVChannelIndices[mui]) + break; + + pvUV[mui] = mesh->mTextureCoords[mui] = new aiVector3D[mesh->mNumVertices]; + + // LightWave doesn't support more than 2 UV components (?) + mesh->mNumUVComponents[0] = 2; + } + + if (layer.mNormals.name.length()) + nrm = mesh->mNormals = new aiVector3D[mesh->mNumVertices]; + + aiColor4D* pvVC[AI_MAX_NUMBER_OF_COLOR_SETS]; + for (unsigned int mui = 0; mui < AI_MAX_NUMBER_OF_COLOR_SETS;++mui) { + if (0xffffffff == vVColorIndices[mui])break; + pvVC[mui] = mesh->mColors[mui] = new aiColor4D[mesh->mNumVertices]; + } + + // we would not need this extra array, but the code is much cleaner if we use it + std::vector<unsigned int>& smoothingGroups = layer.mPointReferrers; + smoothingGroups.erase (smoothingGroups.begin(),smoothingGroups.end()); + smoothingGroups.resize(mesh->mNumFaces,0); + + // now convert all faces + unsigned int vert = 0; + std::vector<unsigned int>::iterator outIt = smoothingGroups.begin(); + for (it = sorted.begin(); it != end;++it,++outIt) { + const LWO::Face& face = layer.mFaces[*it]; + *outIt = face.smoothGroup; + + // copy all vertices + for (unsigned int q = 0; q < face.mNumIndices;++q,++vert) { + register unsigned int idx = face.mIndices[q]; + *pv++ = layer.mTempPoints[idx] /*- layer.mPivot*/; + + // process UV coordinates + for (unsigned int w = 0; w < AI_MAX_NUMBER_OF_TEXTURECOORDS;++w) { + if (0xffffffff == vUVChannelIndices[w]) + break; + aiVector3D*& pp = pvUV[w]; + const aiVector2D& src = ((aiVector2D*)&layer.mUVChannels[vUVChannelIndices[w]].rawData[0])[idx]; + pp->x = src.x; + pp->y = src.y; + pp++; + } + + // process normals (MODO extension) + if (nrm) { + *nrm = ((aiVector3D*)&layer.mNormals.rawData[0])[idx]; + nrm->z *= -1.f; + ++nrm; + } + + // process vertex colors + for (unsigned int w = 0; w < AI_MAX_NUMBER_OF_COLOR_SETS;++w) { + if (0xffffffff == vVColorIndices[w]) + break; + *pvVC[w] = ((aiColor4D*)&layer.mVColorChannels[vVColorIndices[w]].rawData[0])[idx]; + + // If a RGB color map is explicitly requested delete the + // alpha channel - it could theoretically be != 1. + if (_mSurfaces[i].mVCMapType == AI_LWO_RGB) + pvVC[w]->a = 1.f; + + pvVC[w]++; + } + +#if 0 + // process vertex weights. We can't properly reconstruct the whole skeleton for now, + // but we can create dummy bones for all weight channels which we have. + for (unsigned int w = 0; w < layer.mWeightChannels.size();++w) + { + } +#endif + + face.mIndices[q] = vert; + } + pf->mIndices = face.mIndices; + pf->mNumIndices = face.mNumIndices; + unsigned int** p = (unsigned int**)&face.mIndices;*p = NULL; // HACK: make sure it won't be deleted + pf++; + } + + if (!mesh->mNormals) { + // Compute normal vectors for the mesh - we can't use our GenSmoothNormal- + // Step here since it wouldn't handle smoothing groups correctly for LWO. + // So we use a separate implementation. + ComputeNormals(mesh,smoothingGroups,_mSurfaces[i]); + } + else DefaultLogger::get()->debug("LWO2: No need to compute normals, they're already there"); + ++p; + } + } + + // Generate nodes to render the mesh. Store the source layer in the mParent member of the nodes + unsigned int num = apcMeshes.size() - meshStart; + if (layer.mName != "<LWODefault>" || num > 0) { + aiNode* pcNode = new aiNode(); + apcNodes.push_back(pcNode); + pcNode->mName.Set(layer.mName); + pcNode->mParent = (aiNode*)&layer; + pcNode->mNumMeshes = num; + + if (pcNode->mNumMeshes) { + pcNode->mMeshes = new unsigned int[pcNode->mNumMeshes]; + for (unsigned int p = 0; p < pcNode->mNumMeshes;++p) + pcNode->mMeshes[p] = p + meshStart; + } + } + } + + if (apcNodes.empty() || apcMeshes.empty()) + throw DeadlyImportError("LWO: No meshes loaded"); + + // The RemoveRedundantMaterials step will clean this up later + pScene->mMaterials = new aiMaterial*[pScene->mNumMaterials = (unsigned int)mSurfaces->size()]; + for (unsigned int mat = 0; mat < pScene->mNumMaterials;++mat) { + MaterialHelper* pcMat = new MaterialHelper(); + pScene->mMaterials[mat] = pcMat; + ConvertMaterial((*mSurfaces)[mat],pcMat); + } + + // copy the meshes to the output structure + pScene->mMeshes = new aiMesh*[ pScene->mNumMeshes = (unsigned int)apcMeshes.size() ]; + ::memcpy(pScene->mMeshes,&apcMeshes[0],pScene->mNumMeshes*sizeof(void*)); + + // generate the final node graph + GenerateNodeGraph(apcNodes); +} + +// ------------------------------------------------------------------------------------------------ +void LWOImporter::ComputeNormals(aiMesh* mesh, const std::vector<unsigned int>& smoothingGroups, + const LWO::Surface& surface) +{ + // Allocate output storage + mesh->mNormals = new aiVector3D[mesh->mNumVertices]; + + // First generate per-face normals + aiVector3D* out; + std::vector<aiVector3D> faceNormals; + + // ... in some cases that's already enough + if (!surface.mMaximumSmoothAngle) + out = mesh->mNormals; + else { + faceNormals.resize(mesh->mNumVertices); + out = &faceNormals[0]; + } + + aiFace* begin = mesh->mFaces, *const end = mesh->mFaces+mesh->mNumFaces; + for (; begin != end; ++begin) { + aiFace& face = *begin; + + // LWO doc: "the normal is defined as the cross product of the first and last edges" + aiVector3D* pV1 = mesh->mVertices + face.mIndices[0]; + aiVector3D* pV2 = mesh->mVertices + face.mIndices[1]; + aiVector3D* pV3 = mesh->mVertices + face.mIndices[face.mNumIndices-1]; + + aiVector3D vNor = ((*pV2 - *pV1) ^(*pV3 - *pV1)).Normalize(); + for (unsigned int i = 0; i < face.mNumIndices;++i) + out[face.mIndices[i]] = vNor; + } + if (!surface.mMaximumSmoothAngle)return; + const float posEpsilon = ComputePositionEpsilon(mesh); + + // Now generate the spatial sort tree + SGSpatialSort sSort; + std::vector<unsigned int>::const_iterator it = smoothingGroups.begin(); + for ( begin = mesh->mFaces; begin != end; ++begin, ++it) + { + aiFace& face = *begin; + for (unsigned int i = 0; i < face.mNumIndices;++i) + { + register unsigned int tt = face.mIndices[i]; + sSort.Add(mesh->mVertices[tt],tt,*it); + } + } + // Sort everything - this takes O(nlogn) time + sSort.Prepare(); + std::vector<unsigned int> poResult; + poResult.reserve(20); + + // Generate vertex normals. We have O(logn) for the binary lookup, which we need + // for n elements, thus the EXPECTED complexity is O(nlogn) + if (surface.mMaximumSmoothAngle < 3.f && !configSpeedFlag) { + const float fLimit = cos(surface.mMaximumSmoothAngle); + + for ( begin = mesh->mFaces, it = smoothingGroups.begin(); begin != end; ++begin, ++it) { + const aiFace& face = *begin; + unsigned int* beginIdx = face.mIndices, *const endIdx = face.mIndices+face.mNumIndices; + for (; beginIdx != endIdx; ++beginIdx) + { + register unsigned int idx = *beginIdx; + sSort.FindPositions(mesh->mVertices[idx],*it,posEpsilon,poResult,true); + std::vector<unsigned int>::const_iterator a, end = poResult.end(); + + aiVector3D vNormals; + for (a = poResult.begin();a != end;++a) { + const aiVector3D& v = faceNormals[*a]; + if (v * faceNormals[idx] < fLimit) + continue; + vNormals += v; + } + mesh->mNormals[idx] = vNormals.Normalize(); + } + } + } + // faster code path in case there is no smooth angle + else { + std::vector<bool> vertexDone(mesh->mNumVertices,false); + for ( begin = mesh->mFaces, it = smoothingGroups.begin(); begin != end; ++begin, ++it) { + const aiFace& face = *begin; + unsigned int* beginIdx = face.mIndices, *const endIdx = face.mIndices+face.mNumIndices; + for (; beginIdx != endIdx; ++beginIdx) + { + register unsigned int idx = *beginIdx; + if (vertexDone[idx]) + continue; + sSort.FindPositions(mesh->mVertices[idx],*it,posEpsilon,poResult,true); + std::vector<unsigned int>::const_iterator a, end = poResult.end(); + + aiVector3D vNormals; + for (a = poResult.begin();a != end;++a) { + const aiVector3D& v = faceNormals[*a]; + vNormals += v; + } + vNormals.Normalize(); + for (a = poResult.begin();a != end;++a) { + mesh->mNormals[*a] = vNormals; + vertexDone[*a] = true; + } + } + } + } +} + +// ------------------------------------------------------------------------------------------------ +void LWOImporter::AddChildren(aiNode* node, uint16_t parent, std::vector<aiNode*>& apcNodes) +{ + for (std::vector<aiNode*>::iterator it = apcNodes.begin(); it != apcNodes.end(); ++it) { + if (*it) { + LWO::Layer* layer = (LWO::Layer*)(*it)->mParent; + if (layer->mParent == parent && layer->mIndex != parent) + ++node->mNumChildren; + } + } + + if (node->mNumChildren) { + unsigned int p = 0; + + node->mChildren = new aiNode* [ node->mNumChildren ]; + for (std::vector<aiNode*>::iterator it = apcNodes.begin(); it != apcNodes.end(); ++it) { + if (*it) { + LWO::Layer* layer = (LWO::Layer*)(*it)->mParent; + if (layer->mParent == parent && layer->mIndex != parent) { + aiNode* nd = node->mChildren[p++] = *it; + nd->mParent = node; + + // fixme: ignore pivot points for the moment + //nd->mTransformation.a4 = layer->mPivot.x; + //nd->mTransformation.b4 = layer->mPivot.y; + //nd->mTransformation.c4 = layer->mPivot.z; + + // recursively add more children + (*it) = NULL; + AddChildren(nd,layer->mIndex,apcNodes); + } + } + } + } +} + +// ------------------------------------------------------------------------------------------------ +void LWOImporter::GenerateNodeGraph(std::vector<aiNode*>& apcNodes) +{ + // now generate the final nodegraph - generate a root node and attach children + aiNode* root = pScene->mRootNode = new aiNode(); + root->mName.Set("<LWORoot>"); + AddChildren(root,0,apcNodes); + + // check whether we added all layers with meshes assigned to the output graph. + // if not, add them to the root node + unsigned int extra = 0; + for (std::vector<aiNode*>::iterator it = apcNodes.begin(); it != apcNodes.end(); ++it) { + if ((*it) && (*it)->mNumMeshes) + ++extra; + } + + if (extra) { + const unsigned int newSize = extra + pScene->mRootNode->mNumChildren; + aiNode** const apcNewNodes = new aiNode*[newSize]; + if ((extra = root->mNumChildren)) + ::memcpy(apcNewNodes,root->mChildren,extra*sizeof(void*)); + + aiNode** cc = apcNewNodes+extra; + for (std::vector<aiNode*>::iterator it = apcNodes.begin(); it != apcNodes.end(); ++it) { + if ((*it) && (*it)->mNumMeshes) { + aiNode* nd = *cc++ = *it; + nd->mParent = pScene->mRootNode; + + // recursively add more children + (*it) = NULL; + AddChildren(nd,((LWO::Layer*)nd->mParent)->mIndex,apcNodes); + } + } + delete[] root->mChildren; + root->mChildren = apcNewNodes; + root->mNumChildren = newSize; + } + if (!pScene->mRootNode->mNumChildren) + throw DeadlyImportError("LWO: Unable to build a valid node graph"); + + // Remove a single root node with no meshes assigned to it ... + if (1 == pScene->mRootNode->mNumChildren) { + aiNode* pc = pScene->mRootNode->mChildren[0]; + pc->mParent = pScene->mRootNode->mChildren[0] = NULL; + delete pScene->mRootNode; + pScene->mRootNode = pc; + } + + // convert the whole stuff to RH with CCW winding + MakeLeftHandedProcess maker; + maker.Execute(pScene); + + FlipWindingOrderProcess flipper; + flipper.Execute(pScene); +} + +// ------------------------------------------------------------------------------------------------ +void LWOImporter::ResolveTags() +{ + // --- this function is used for both LWO2 and LWOB + mMapping->resize(mTags->size(),0xffffffff); + for (unsigned int a = 0; a < mTags->size();++a) { + + const std::string& c = (*mTags)[a]; + for (unsigned int i = 0; i < mSurfaces->size();++i) { + + const std::string& d = (*mSurfaces)[i].mName; + if (!ASSIMP_stricmp(c,d)) { + + (*mMapping)[a] = i; + break; + } + } + } +} + +// ------------------------------------------------------------------------------------------------ +void LWOImporter::ResolveClips() +{ + for ( unsigned int i = 0; i < mClips.size();++i) { + + Clip& clip = mClips[i]; + if (Clip::REF == clip.type) { + + if (clip.clipRef >= mClips.size()) { + DefaultLogger::get()->error("LWO2: Clip referrer index is out of range"); + clip.clipRef = 0; + } + + Clip& dest = mClips[clip.clipRef]; + if (Clip::REF == dest.type) { + DefaultLogger::get()->error("LWO2: Clip references another clip reference"); + clip.type = Clip::UNSUPPORTED; + } + + else { + clip.path = dest.path; + clip.type = dest.type; + } + } + } +} + +// ------------------------------------------------------------------------------------------------ +void LWOImporter::AdjustTexturePath(std::string& out) +{ + // --- this function is used for both LWO2 and LWOB + if (!mIsLWO2 && ::strstr(out.c_str(), "(sequence)")) { + + // remove the (sequence) and append 000 + DefaultLogger::get()->info("LWOB: Sequence of animated texture found. It will be ignored"); + out = out.substr(0,out.length()-10) + "000"; + } + + // format: drive:path/file - we just need to insert a slash after the drive + std::string::size_type n = out.find_first_of(':'); + if (std::string::npos != n) { + out.insert(n+1,"/"); + } +} + +// ------------------------------------------------------------------------------------------------ +void LWOImporter::LoadLWOTags(unsigned int size) +{ + // --- this function is used for both LWO2 and LWOB + + const char* szCur = (const char*)mFileBuffer, *szLast = szCur; + const char* const szEnd = szLast+size; + while (szCur < szEnd) + { + if (!(*szCur)) + { + const size_t len = (size_t)(szCur-szLast); + // FIX: skip empty-sized tags + if (len) + mTags->push_back(std::string(szLast,len)); + szCur += (len&0x1 ? 1 : 2); + szLast = szCur; + } + szCur++; + } +} + +// ------------------------------------------------------------------------------------------------ +void LWOImporter::LoadLWOPoints(unsigned int length) +{ + // --- this function is used for both LWO2 and LWOB but for + // LWO2 we need to allocate 25% more storage - it could be we'll + // need to duplicate some points later. + register unsigned int regularSize = (unsigned int)mCurLayer->mTempPoints.size() + length / 12; + if (mIsLWO2) + { + mCurLayer->mTempPoints.reserve ( regularSize + (regularSize>>2u) ); + mCurLayer->mTempPoints.resize ( regularSize ); + + // initialize all point referrers with the default values + mCurLayer->mPointReferrers.reserve ( regularSize + (regularSize>>2u) ); + mCurLayer->mPointReferrers.resize ( regularSize, 0xffffffff ); + } + else mCurLayer->mTempPoints.resize( regularSize ); + + // perform endianess conversions +#ifndef AI_BUILD_BIG_ENDIAN + for (unsigned int i = 0; i < length>>2;++i) + ByteSwap::Swap4( mFileBuffer + (i << 2)); +#endif + ::memcpy(&mCurLayer->mTempPoints[0],mFileBuffer,length); +} + +// ------------------------------------------------------------------------------------------------ +void LWOImporter::LoadLWO2Polygons(unsigned int length) +{ + LE_NCONST uint16_t* const end = (LE_NCONST uint16_t*)(mFileBuffer+length); + const uint32_t type = GetU4(); + + // Determine the type of the polygons + switch (type) + { + // read unsupported stuff too (although we wont process it) + case AI_LWO_MBAL: + DefaultLogger::get()->warn("LWO2: Encountered unsupported primitive chunk (METABALL)"); + break; + case AI_LWO_CURV: + DefaultLogger::get()->warn("LWO2: Encountered unsupported primitive chunk (SPLINE)");; + break; + + // These are ok with no restrictions + case AI_LWO_PTCH: + case AI_LWO_FACE: + case AI_LWO_BONE: + case AI_LWO_SUBD: + break; + default: + + // hm!? wtf is this? ok ... + DefaultLogger::get()->error("LWO2: Ignoring unknown polygon type."); + break; + } + + // first find out how many faces and vertices we'll finally need + uint16_t* cursor= (uint16_t*)mFileBuffer; + + unsigned int iNumFaces = 0,iNumVertices = 0; + CountVertsAndFacesLWO2(iNumVertices,iNumFaces,cursor,end); + + // allocate the output array and copy face indices + if (iNumFaces) { + cursor = (uint16_t*)mFileBuffer; + + mCurLayer->mFaces.resize(iNumFaces,LWO::Face(type)); + FaceList::iterator it = mCurLayer->mFaces.begin(); + CopyFaceIndicesLWO2(it,cursor,end); + } +} + +// ------------------------------------------------------------------------------------------------ +void LWOImporter::CountVertsAndFacesLWO2(unsigned int& verts, unsigned int& faces, + uint16_t*& cursor, const uint16_t* const end, unsigned int max) +{ + while (cursor < end && max--) + { + AI_LSWAP2P(cursor); + uint16_t numIndices = *cursor++; + numIndices &= 0x03FF; + verts += numIndices;++faces; + + for (uint16_t i = 0; i < numIndices; i++) + ReadVSizedIntLWO2((uint8_t*&)cursor); + } +} + +// ------------------------------------------------------------------------------------------------ +void LWOImporter::CopyFaceIndicesLWO2(FaceList::iterator& it, + uint16_t*& cursor, + const uint16_t* const end) +{ + while (cursor < end) { + + LWO::Face& face = *it++;; + if ((face.mNumIndices = (*cursor++) & 0x03FF)) /* byte swapping has already been done */ { + face.mIndices = new unsigned int[face.mNumIndices]; + for (unsigned int i = 0; i < face.mNumIndices; i++) + { + face.mIndices[i] = ReadVSizedIntLWO2((uint8_t*&)cursor) + mCurLayer->mPointIDXOfs; + if (face.mIndices[i] > mCurLayer->mTempPoints.size()) + { + DefaultLogger::get()->warn("LWO2: Failure evaluating face record, index is out of range"); + face.mIndices[i] = (unsigned int)mCurLayer->mTempPoints.size()-1; + } + } + } + else throw DeadlyImportError("LWO2: Encountered invalid face record with zero indices"); + } +} + + +// ------------------------------------------------------------------------------------------------ +void LWOImporter::LoadLWO2PolygonTags(unsigned int length) +{ + LE_NCONST uint8_t* const end = mFileBuffer+length; + + AI_LWO_VALIDATE_CHUNK_LENGTH(length,PTAG,4); + uint32_t type = GetU4(); + + if (type != AI_LWO_SURF && type != AI_LWO_SMGP) + return; + + while (mFileBuffer < end) { + + unsigned int i = ReadVSizedIntLWO2(mFileBuffer) + mCurLayer->mFaceIDXOfs; + unsigned int j = GetU2(); + + if (i >= mCurLayer->mFaces.size()) { + DefaultLogger::get()->warn("LWO2: face index in PTAG is out of range"); + continue; + } + + switch (type) { + + case AI_LWO_SURF: + mCurLayer->mFaces[i].surfaceIndex = j; + break; + case AI_LWO_SMGP: /* is that really used? */ + mCurLayer->mFaces[i].smoothGroup = j; + break; + }; + } +} + +// ------------------------------------------------------------------------------------------------ +template <class T> +VMapEntry* FindEntry(std::vector< T >& list,const std::string& name, bool perPoly) +{ + for (typename std::vector< T >::iterator it = list.begin(), end = list.end();it != end; ++it) { + if ((*it).name == name) { + if (!perPoly) { + DefaultLogger::get()->warn("LWO2: Found two VMAP sections with equal names"); + } + return &(*it); + } + } + list.push_back( T() ); + VMapEntry* p = &list.back(); + p->name = name; + return p; +} + +// ------------------------------------------------------------------------------------------------ +template <class T> +inline void CreateNewEntry(T& chan, unsigned int srcIdx) +{ + if (!chan.name.length()) + return; + + chan.abAssigned[srcIdx] = true; + chan.abAssigned.resize(chan.abAssigned.size()+1,false); + + for (unsigned int a = 0; a < chan.dims;++a) + chan.rawData.push_back(chan.rawData[srcIdx*chan.dims+a]); +} + +// ------------------------------------------------------------------------------------------------ +template <class T> +inline void CreateNewEntry(std::vector< T >& list, unsigned int srcIdx) +{ + for (typename std::vector< T >::iterator it = list.begin(), end = list.end();it != end;++it) { + CreateNewEntry( *it, srcIdx ); + } +} + +// ------------------------------------------------------------------------------------------------ +inline void LWOImporter::DoRecursiveVMAPAssignment(VMapEntry* base, unsigned int numRead, + unsigned int idx, float* data) +{ + ai_assert(NULL != data); + LWO::ReferrerList& refList = mCurLayer->mPointReferrers; + unsigned int i; + + base->abAssigned[idx] = true; + for (i = 0; i < numRead;++i) { + base->rawData[idx*base->dims+i]= data[i]; + } + + if (0xffffffff != (i = refList[idx])) { + DoRecursiveVMAPAssignment(base,numRead,i,data); + } +} + +// ------------------------------------------------------------------------------------------------ +inline void AddToSingleLinkedList(ReferrerList& refList, unsigned int srcIdx, unsigned int destIdx) +{ + if (0xffffffff == refList[srcIdx]) { + refList[srcIdx] = destIdx; + return; + } + AddToSingleLinkedList(refList,refList[srcIdx],destIdx); +} + +// ------------------------------------------------------------------------------------------------ +// Load LWO2 vertex map +void LWOImporter::LoadLWO2VertexMap(unsigned int length, bool perPoly) +{ + LE_NCONST uint8_t* const end = mFileBuffer+length; + + AI_LWO_VALIDATE_CHUNK_LENGTH(length,VMAP,6); + unsigned int type = GetU4(); + unsigned int dims = GetU2(); + + VMapEntry* base; + + // read the name of the vertex map + std::string name; + GetS0(name,length); + + switch (type) + { + case AI_LWO_TXUV: + if (dims != 2) { + DefaultLogger::get()->warn("LWO2: Skipping UV channel \'" + + name + "\' with !2 components"); + return; + } + base = FindEntry(mCurLayer->mUVChannels,name,perPoly); + break; + case AI_LWO_WGHT: + case AI_LWO_MNVW: + if (dims != 1) { + DefaultLogger::get()->warn("LWO2: Skipping Weight Channel \'" + + name + "\' with !1 components"); + return; + } + base = FindEntry((type == AI_LWO_WGHT ? mCurLayer->mWeightChannels + : mCurLayer->mSWeightChannels),name,perPoly); + break; + case AI_LWO_RGB: + case AI_LWO_RGBA: + if (dims != 3 && dims != 4) { + DefaultLogger::get()->warn("LWO2: Skipping Color Map \'" + + name + "\' with a dimension > 4 or < 3"); + return; + } + base = FindEntry(mCurLayer->mVColorChannels,name,perPoly); + break; + + case AI_LWO_MODO_NORM: + /* This is a non-standard extension chunk used by Luxology's MODO. + * It stores per-vertex normals. This VMAP exists just once, has + * 3 dimensions and is btw extremely beautiful. + */ + if (name != "vert_normals" || dims != 3 || mCurLayer->mNormals.name.length()) + return; + + DefaultLogger::get()->info("Processing non-standard extension: MODO VMAP.NORM.vert_normals"); + + mCurLayer->mNormals.name = name; + base = & mCurLayer->mNormals; + break; + + case AI_LWO_PICK: /* these VMAPs are just silently dropped */ + case AI_LWO_MORF: + case AI_LWO_SPOT: + return; + + default: + if (name == "APS.Level") { + // XXX handle this (seems to be subdivision-related). + } + DefaultLogger::get()->warn("LWO2: Skipping unknown VMAP/VMAD channel \'" + name + "\'"); + return; + }; + base->Allocate((unsigned int)mCurLayer->mTempPoints.size()); + + // now read all entries in the map + type = std::min(dims,base->dims); + const unsigned int diff = (dims - type)<<2u; + + LWO::FaceList& list = mCurLayer->mFaces; + LWO::PointList& pointList = mCurLayer->mTempPoints; + LWO::ReferrerList& refList = mCurLayer->mPointReferrers; + + float temp[4]; + + const unsigned int numPoints = (unsigned int)pointList.size(); + const unsigned int numFaces = (unsigned int)list.size(); + + while (mFileBuffer < end) { + + unsigned int idx = ReadVSizedIntLWO2(mFileBuffer) + mCurLayer->mPointIDXOfs; + if (idx >= numPoints) { + DefaultLogger::get()->warn("LWO2: Failure evaluating VMAP/VMAD entry \'" + name + "\', vertex index is out of range"); + mFileBuffer += base->dims<<2u; + continue; + } + if (perPoly) { + unsigned int polyIdx = ReadVSizedIntLWO2(mFileBuffer) + mCurLayer->mFaceIDXOfs; + if (base->abAssigned[idx]) { + // we have already a VMAP entry for this vertex - thus + // we need to duplicate the corresponding polygon. + if (polyIdx >= numFaces) { + DefaultLogger::get()->warn("LWO2: Failure evaluating VMAD entry \'" + name + "\', polygon index is out of range"); + mFileBuffer += base->dims<<2u; + continue; + } + + LWO::Face& src = list[polyIdx]; + + // generate a new unique vertex for the corresponding index - but only + // if we can find the index in the face + bool had = false; + for (unsigned int i = 0; i < src.mNumIndices;++i) { + + unsigned int srcIdx = src.mIndices[i], tmp = idx; + do { + if (tmp == srcIdx) + break; + } + while ((tmp = refList[tmp]) != 0xffffffff); + if (tmp == 0xffffffff) + continue; + + had = true; + refList.resize(refList.size()+1, 0xffffffff); + + idx = (unsigned int)pointList.size(); + src.mIndices[i] = (unsigned int)pointList.size(); + + // store the index of the new vertex in the old vertex + // so we get a single linked list we can traverse in + // only one direction + AddToSingleLinkedList(refList,srcIdx,src.mIndices[i]); + pointList.push_back(pointList[srcIdx]); + + CreateNewEntry(mCurLayer->mVColorChannels, srcIdx ); + CreateNewEntry(mCurLayer->mUVChannels, srcIdx ); + CreateNewEntry(mCurLayer->mWeightChannels, srcIdx ); + CreateNewEntry(mCurLayer->mSWeightChannels, srcIdx ); + CreateNewEntry(mCurLayer->mNormals, srcIdx ); + } + if (!had) { + DefaultLogger::get()->warn("LWO2: Failure evaluating VMAD entry \'" + name + "\', vertex index wasn't found in that polygon"); + ai_assert(had); + } + } + } + for (unsigned int l = 0; l < type;++l) + temp[l] = GetF4(); + + DoRecursiveVMAPAssignment(base,type,idx, temp); + mFileBuffer += diff; + } +} + +// ------------------------------------------------------------------------------------------------ +// Load LWO2 clip +void LWOImporter::LoadLWO2Clip(unsigned int length) +{ + AI_LWO_VALIDATE_CHUNK_LENGTH(length,CLIP,10); + + mClips.push_back(LWO::Clip()); + LWO::Clip& clip = mClips.back(); + + // first - get the index of the clip + clip.idx = GetU4(); + + IFF::SubChunkHeader* const head = IFF::LoadSubChunk(mFileBuffer); + switch (head->type) + { + case AI_LWO_STIL: + AI_LWO_VALIDATE_CHUNK_LENGTH(head->length,STIL,1); + + // "Normal" texture + GetS0(clip.path,head->length); + clip.type = Clip::STILL; + break; + + case AI_LWO_ISEQ: + AI_LWO_VALIDATE_CHUNK_LENGTH(head->length,ISEQ,16); + // Image sequence. We'll later take the first. + { + uint8_t digits = GetU1(); mFileBuffer++; + int16_t offset = GetU2(); mFileBuffer+=4; + int16_t start = GetU2(); mFileBuffer+=4; + + std::string s;std::stringstream ss; + GetS0(s,head->length); + + head->length -= (unsigned int)s.length()+1; + ss << s; + ss << std::setw(digits) << offset + start; + GetS0(s,head->length); + ss << s; + clip.path = ss.str(); + clip.type = Clip::SEQ; + } + break; + + case AI_LWO_STCC: + DefaultLogger::get()->warn("LWO2: Color shifted images are not supported"); + break; + + case AI_LWO_ANIM: + DefaultLogger::get()->warn("LWO2: Animated textures are not supported"); + break; + + case AI_LWO_XREF: + AI_LWO_VALIDATE_CHUNK_LENGTH(head->length,XREF,4); + + // Just a cross-reference to another CLIp + clip.type = Clip::REF; + clip.clipRef = GetU4(); + break; + + case AI_LWO_NEGA: + AI_LWO_VALIDATE_CHUNK_LENGTH(head->length,NEGA,2); + clip.negate = (0 != GetU2()); + break; + + default: + DefaultLogger::get()->warn("LWO2: Encountered unknown CLIP subchunk"); + } +} + +// ------------------------------------------------------------------------------------------------ +// Load envelope description +void LWOImporter::LoadLWO2Envelope(unsigned int length) +{ + LE_NCONST uint8_t* const end = mFileBuffer + length; + AI_LWO_VALIDATE_CHUNK_LENGTH(length,ENVL,4); + + mEnvelopes.push_back(LWO::Envelope()); + LWO::Envelope& envelope = mEnvelopes.back(); + + // Get the index of the envelope + envelope.index = ReadVSizedIntLWO2(mFileBuffer); + + // It looks like there might be an extra U4 right after the index, + // at least in modo (LXOB) files: we'll ignore it if it's zero, + // otherwise it represents the start of a subchunk, so we backtrack. + if (mIsLXOB) + { + uint32_t extra = GetU4(); + if (extra) + { + mFileBuffer -= 4; + } + } + + // ... and read all subchunks + while (true) + { + if (mFileBuffer + 6 >= end)break; + LE_NCONST IFF::SubChunkHeader* const head = IFF::LoadSubChunk(mFileBuffer); + + if (mFileBuffer + head->length > end) + throw DeadlyImportError("LWO2: Invalid envelope chunk length"); + + uint8_t* const next = mFileBuffer+head->length; + switch (head->type) + { + // Type & representation of the envelope + case AI_LWO_TYPE: + AI_LWO_VALIDATE_CHUNK_LENGTH(head->length,TYPE,2); + mFileBuffer++; // skip user format + + // Determine type of envelope + envelope.type = (LWO::EnvelopeType)*mFileBuffer; + ++mFileBuffer; + break; + + // precondition + case AI_LWO_PRE: + AI_LWO_VALIDATE_CHUNK_LENGTH(head->length,PRE,2); + envelope.pre = (LWO::PrePostBehaviour)GetU2(); + break; + + // postcondition + case AI_LWO_POST: + AI_LWO_VALIDATE_CHUNK_LENGTH(head->length,POST,2); + envelope.post = (LWO::PrePostBehaviour)GetU2(); + break; + + // keyframe + case AI_LWO_KEY: + { + AI_LWO_VALIDATE_CHUNK_LENGTH(head->length,KEY,8); + + envelope.keys.push_back(LWO::Key()); + LWO::Key& key = envelope.keys.back(); + + key.time = GetF4(); + key.value = GetF4(); + break; + } + + // interval interpolation + case AI_LWO_SPAN: + { + AI_LWO_VALIDATE_CHUNK_LENGTH(head->length,SPAN,4); + if (envelope.keys.size()<2) + DefaultLogger::get()->warn("LWO2: Unexpected SPAN chunk"); + else { + LWO::Key& key = envelope.keys.back(); + switch (GetU4()) + { + case AI_LWO_STEP: + key.inter = LWO::IT_STEP;break; + case AI_LWO_LINE: + key.inter = LWO::IT_LINE;break; + case AI_LWO_TCB: + key.inter = LWO::IT_TCB;break; + case AI_LWO_HERM: + key.inter = LWO::IT_HERM;break; + case AI_LWO_BEZI: + key.inter = LWO::IT_BEZI;break; + case AI_LWO_BEZ2: + key.inter = LWO::IT_BEZ2;break; + default: + DefaultLogger::get()->warn("LWO2: Unknown interval interpolation mode"); + }; + + // todo ... read params + } + break; + } + + default: + DefaultLogger::get()->warn("LWO2: Encountered unknown ENVL subchunk"); + } + // regardless how much we did actually read, go to the next chunk + mFileBuffer = next; + } +} + +// ------------------------------------------------------------------------------------------------ +// Load file - master function +void LWOImporter::LoadLWO2File() +{ + bool skip = false; + + LE_NCONST uint8_t* const end = mFileBuffer + fileSize; + while (true) + { + if (mFileBuffer + sizeof(IFF::ChunkHeader) > end)break; + IFF::ChunkHeader* const head = IFF::LoadChunk(mFileBuffer); + + if (mFileBuffer + head->length > end) + { + throw DeadlyImportError("LWO2: Chunk length points behind the file"); + break; + } + uint8_t* const next = mFileBuffer+head->length; + unsigned int iUnnamed = 0; + + switch (head->type) + { + // new layer + case AI_LWO_LAYR: + { + // add a new layer to the list .... + mLayers->push_back ( LWO::Layer() ); + LWO::Layer& layer = mLayers->back(); + mCurLayer = &layer; + + AI_LWO_VALIDATE_CHUNK_LENGTH(head->length,LAYR,16); + + // Continue loading this layer or ignore it? Check the layer index property + // NOTE: The first layer is the default layer, so the layer index is one-based now + if (0xffffffff != configLayerIndex && configLayerIndex != mLayers->size()-1) { + skip = true; + } + else skip = false; + + // layer index. that's just for internal parenting, from the scope of a LWS file + // all layers are numbered in the oder in which they appear in the file + layer.mIndex = GetU2(); + + // pivot point + mFileBuffer += 2; /* unknown */ + mCurLayer->mPivot.x = GetF4(); + mCurLayer->mPivot.y = GetF4(); + mCurLayer->mPivot.z = GetF4(); + GetS0(layer.mName,head->length-16); + + // if the name is empty, generate a default name + if (layer.mName.empty()) { + char buffer[128]; // should be sufficiently large + ::sprintf(buffer,"Layer_%i", iUnnamed++); + layer.mName = buffer; + } + + // load this layer or ignore it? Check the layer name property + if (configLayerName.length() && configLayerName != layer.mName) { + skip = true; + } + else hasNamedLayer = true; + + // optional: parent of this layer + if (mFileBuffer + 2 <= next) + layer.mParent = GetU2(); + + break; + } + + // vertex list + case AI_LWO_PNTS: + { + if (skip) + break; + + unsigned int old = (unsigned int)mCurLayer->mTempPoints.size(); + LoadLWOPoints(head->length); + mCurLayer->mPointIDXOfs = old; + break; + } + // vertex tags + case AI_LWO_VMAD: + if (mCurLayer->mFaces.empty()) + { + DefaultLogger::get()->warn("LWO2: Unexpected VMAD chunk"); + break; + } + // --- intentionally no break here + case AI_LWO_VMAP: + { + if (skip) + break; + + if (mCurLayer->mTempPoints.empty()) + DefaultLogger::get()->warn("LWO2: Unexpected VMAP chunk"); + else LoadLWO2VertexMap(head->length,head->type == AI_LWO_VMAD); + break; + } + // face list + case AI_LWO_POLS: + { + if (skip) + break; + + unsigned int old = (unsigned int)mCurLayer->mFaces.size(); + LoadLWO2Polygons(head->length); + mCurLayer->mFaceIDXOfs = old; + break; + } + // polygon tags + case AI_LWO_PTAG: + { + if (skip) + break; + + if (mCurLayer->mFaces.empty()) + DefaultLogger::get()->warn("LWO2: Unexpected PTAG"); + else LoadLWO2PolygonTags(head->length); + break; + } + // list of tags + case AI_LWO_TAGS: + { + if (!mTags->empty()) + DefaultLogger::get()->warn("LWO2: SRFS chunk encountered twice"); + else LoadLWOTags(head->length); + break; + } + + // surface chunk + case AI_LWO_SURF: + { + LoadLWO2Surface(head->length); + break; + } + + // clip chunk + case AI_LWO_CLIP: + { + LoadLWO2Clip(head->length); + break; + } + + // envelope chunk + case AI_LWO_ENVL: + { + LoadLWO2Envelope(head->length); + break; + } + } + mFileBuffer = next; + } +} + +#endif // !! ASSIMP_BUILD_NO_LWO_IMPORTER |