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Diffstat (limited to 'libs/assimp/code/AssetLib/LWO/LWOLoader.cpp')
| -rw-r--r-- | libs/assimp/code/AssetLib/LWO/LWOLoader.cpp | 1422 |
1 files changed, 1422 insertions, 0 deletions
diff --git a/libs/assimp/code/AssetLib/LWO/LWOLoader.cpp b/libs/assimp/code/AssetLib/LWO/LWOLoader.cpp new file mode 100644 index 0000000..7410fb6 --- /dev/null +++ b/libs/assimp/code/AssetLib/LWO/LWOLoader.cpp @@ -0,0 +1,1422 @@ +/* +--------------------------------------------------------------------------- +Open Asset Import Library (assimp) +--------------------------------------------------------------------------- + +Copyright (c) 2006-2022, assimp 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 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 + */ + +#ifndef ASSIMP_BUILD_NO_LWO_IMPORTER + +// internal headers +#include "AssetLib/LWO/LWOLoader.h" +#include "PostProcessing/ConvertToLHProcess.h" +#include "PostProcessing/ProcessHelper.h" + +#include <assimp/ByteSwapper.h> +#include <assimp/SGSpatialSort.h> +#include <assimp/StringComparison.h> +#include <assimp/importerdesc.h> +#include <assimp/IOSystem.hpp> + +#include <iomanip> +#include <map> +#include <memory> +#include <sstream> + +using namespace Assimp; + +static const aiImporterDesc desc = { + "LightWave/Modo Object Importer", + "", + "", + "https://www.lightwave3d.com/lightwave_sdk/", + aiImporterFlags_SupportTextFlavour, + 0, + 0, + 0, + 0, + "lwo lxo" +}; + +// ------------------------------------------------------------------------------------------------ +// Constructor to be privately used by Importer +LWOImporter::LWOImporter() : + mIsLWO2(), + mIsLXOB(), + mLayers(), + mCurLayer(), + mTags(), + mMapping(), + mSurfaces(), + mFileBuffer(), + fileSize(), + mScene(nullptr), + configSpeedFlag(), + configLayerIndex(), + hasNamedLayer() { + // empty +} + +// ------------------------------------------------------------------------------------------------ +// Destructor, private as well +LWOImporter::~LWOImporter() { + // empty +} + +// ------------------------------------------------------------------------------------------------ +// Returns whether the class can handle the format of the given file. +bool LWOImporter::CanRead(const std::string &file, IOSystem *pIOHandler, bool /*checkSig*/) const { + static const uint32_t tokens[] = { + AI_LWO_FOURCC_LWOB, + AI_LWO_FOURCC_LWO2, + AI_LWO_FOURCC_LXOB + }; + return CheckMagicToken(pIOHandler, file, tokens, AI_COUNT_OF(tokens), 8); +} + +// ------------------------------------------------------------------------------------------------ +// 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, UINT_MAX); + configLayerName = pImp->GetPropertyString(AI_CONFIG_IMPORT_LWO_ONE_LAYER_ONLY, ""); +} + +// ------------------------------------------------------------------------------------------------ +// Get list of file extensions +const aiImporterDesc *LWOImporter::GetInfo() const { + return &desc; +} + +// ------------------------------------------------------------------------------------------------ +// Imports the given file into the given scene structure. +void LWOImporter::InternReadFile(const std::string &pFile, + aiScene *pScene, + IOSystem *pIOHandler) { + std::unique_ptr<IOStream> file(pIOHandler->Open(pFile, "rb")); + + // Check whether we can read from the file + if (file.get() == nullptr) { + 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); + mScene = 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>"; + mCurLayer->mIndex = (uint16_t) -1; + + // old lightwave file format (prior to v6) + if (AI_LWO_FOURCC_LWOB == fileType) { + ASSIMP_LOG_INFO("LWO file format: LWOB (<= LightWave 5.5)"); + + mIsLWO2 = false; + mIsLXOB = false; + LoadLWOBFile(); + } else if (AI_LWO_FOURCC_LWO2 == fileType) { + // New lightwave format + mIsLXOB = false; + ASSIMP_LOG_INFO("LWO file format: LWO2 (>= LightWave 6)"); + } else if (AI_LWO_FOURCC_LXOB == fileType) { + // MODO file format + mIsLXOB = true; + ASSIMP_LOG_INFO("LWO file format: LXOB (Modo)"); + } + 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("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 (UINT_MAX != configLayerIndex) { + unsigned int layerCount = 0; + for (std::list<LWO::Layer>::iterator itLayers = mLayers->begin(); itLayers != mLayers->end(); ++itLayers) + if (!itLayers->skip) + layerCount++; + if (layerCount != 2) + 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::map<uint16_t, aiNode *> apcNodes; + + apcMeshes.reserve(mLayers->size() * std::min(((unsigned int)mSurfaces->size() / 2u), 1u)); + + unsigned int iDefaultSurface = UINT_MAX; // index of the default surface + for (LWO::Layer &layer : *mLayers) { + 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()) { + ASSIMP_LOG_WARN("LWO: Invalid face surface index"); + idx = UINT_MAX; + } + if (UINT_MAX == idx || UINT_MAX == (idx = _mMapping[idx])) { + if (UINT_MAX == 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 (UINT_MAX == iDefaultSurface) { + pSorted.erase(pSorted.end() - 1); + } + for (unsigned int p = 0, j = 0; j < mSurfaces->size(); ++j) { + SortedRep &sorted = pSorted[j]; + 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 = nullptr, *pv = mesh->mVertices = new aiVector3D[mesh->mNumVertices]; + aiFace *pf = mesh->mFaces = new aiFace[mesh->mNumFaces]; + mesh->mMaterialIndex = j; + + // 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]; + +#ifdef ASSIMP_BUILD_DEBUG + for (unsigned int mui = 0; mui < AI_MAX_NUMBER_OF_TEXTURECOORDS; ++mui) { + vUVChannelIndices[mui] = UINT_MAX; + } + for (unsigned int mui = 0; mui < AI_MAX_NUMBER_OF_COLOR_SETS; ++mui) { + vVColorIndices[mui] = UINT_MAX; + } +#endif + + FindUVChannels(_mSurfaces[j], sorted, layer, vUVChannelIndices); + FindVCChannels(_mSurfaces[j], 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 (UINT_MAX == 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 (UINT_MAX == 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) { + 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 (UINT_MAX == 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 (UINT_MAX == 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[j].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 **facePtr = (unsigned int **)&face.mIndices; + *facePtr = nullptr; // 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[j]); + } else { + ASSIMP_LOG_VERBOSE_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 = static_cast<unsigned int>(apcMeshes.size() - meshStart); + if (layer.mName != "<LWODefault>" || num > 0) { + aiNode *pcNode = new aiNode(); + 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; + } + apcNodes[layer.mIndex] = pcNode; + } + } + + 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) { + aiMaterial *pcMat = new aiMaterial(); + 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; + + if (face.mNumIndices < 3) { + continue; + } + + // 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) { + 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 = std::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) { + unsigned int idx = *beginIdx; + sSort.FindPositions(mesh->mVertices[idx], *it, posEpsilon, poResult, true); + + aiVector3D vNormals; + for (std::vector<unsigned int>::const_iterator a = poResult.begin(); a != poResult.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) { + unsigned int idx = *beginIdx; + if (vertexDone[idx]) + continue; + sSort.FindPositions(mesh->mVertices[idx], *it, posEpsilon, poResult, true); + + aiVector3D vNormals; + for (std::vector<unsigned int>::const_iterator a = poResult.begin(); a != poResult.end(); ++a) { + const aiVector3D &v = faceNormals[*a]; + vNormals += v; + } + vNormals.Normalize(); + for (std::vector<unsigned int>::const_iterator a = poResult.begin(); a != poResult.end(); ++a) { + mesh->mNormals[*a] = vNormals; + vertexDone[*a] = true; + } + } + } + } +} + +// ------------------------------------------------------------------------------------------------ +void LWOImporter::GenerateNodeGraph(std::map<uint16_t, aiNode *> &apcNodes) { + // now generate the final nodegraph - generate a root node and attach children + aiNode *root = mScene->mRootNode = new aiNode(); + root->mName.Set("<LWORoot>"); + + //Set parent of all children, inserting pivots + std::map<uint16_t, aiNode *> mapPivot; + for (auto itapcNodes = apcNodes.begin(); itapcNodes != apcNodes.end(); ++itapcNodes) { + + //Get the parent index + LWO::Layer *nodeLayer = (LWO::Layer *)(itapcNodes->second->mParent); + uint16_t parentIndex = nodeLayer->mParent; + + //Create pivot node, store it into the pivot map, and set the parent as the pivot + aiNode *pivotNode = new aiNode(); + pivotNode->mName.Set("Pivot-" + std::string(itapcNodes->second->mName.data)); + itapcNodes->second->mParent = pivotNode; + + //Look for the parent node to attach the pivot to + if (apcNodes.find(parentIndex) != apcNodes.end()) { + pivotNode->mParent = apcNodes[parentIndex]; + } else { + //If not, attach to the root node + pivotNode->mParent = root; + } + + //Set the node and the pivot node transformation + itapcNodes->second->mTransformation.a4 = -nodeLayer->mPivot.x; + itapcNodes->second->mTransformation.b4 = -nodeLayer->mPivot.y; + itapcNodes->second->mTransformation.c4 = -nodeLayer->mPivot.z; + pivotNode->mTransformation.a4 = nodeLayer->mPivot.x; + pivotNode->mTransformation.b4 = nodeLayer->mPivot.y; + pivotNode->mTransformation.c4 = nodeLayer->mPivot.z; + mapPivot[-(itapcNodes->first + 2)] = pivotNode; + } + + //Merge pivot map into node map + for (auto itMapPivot = mapPivot.begin(); itMapPivot != mapPivot.end(); ++itMapPivot) { + apcNodes[itMapPivot->first] = itMapPivot->second; + } + + //Set children of all parents + apcNodes[(uint16_t)-1] = root; + for (auto itMapParentNodes = apcNodes.begin(); itMapParentNodes != apcNodes.end(); ++itMapParentNodes) { + for (auto itMapChildNodes = apcNodes.begin(); itMapChildNodes != apcNodes.end(); ++itMapChildNodes) { + if ((itMapParentNodes->first != itMapChildNodes->first) && (itMapParentNodes->second == itMapChildNodes->second->mParent)) { + ++(itMapParentNodes->second->mNumChildren); + } + } + if (itMapParentNodes->second->mNumChildren) { + itMapParentNodes->second->mChildren = new aiNode *[itMapParentNodes->second->mNumChildren]; + uint16_t p = 0; + for (auto itMapChildNodes = apcNodes.begin(); itMapChildNodes != apcNodes.end(); ++itMapChildNodes) { + if ((itMapParentNodes->first != itMapChildNodes->first) && (itMapParentNodes->second == itMapChildNodes->second->mParent)) { + itMapParentNodes->second->mChildren[p++] = itMapChildNodes->second; + } + } + } + } + + if (!mScene->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 == mScene->mRootNode->mNumChildren) { + aiNode *pc = mScene->mRootNode->mChildren[0]; + pc->mParent = mScene->mRootNode->mChildren[0] = nullptr; + delete mScene->mRootNode; + mScene->mRootNode = pc; + } + + // convert the whole stuff to RH with CCW winding + MakeLeftHandedProcess maker; + maker.Execute(mScene); + + FlipWindingOrderProcess flipper; + flipper.Execute(mScene); +} + +// ------------------------------------------------------------------------------------------------ +void LWOImporter::ResolveTags() { + // --- this function is used for both LWO2 and LWOB + mMapping->resize(mTags->size(), UINT_MAX); + 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()) { + ASSIMP_LOG_ERROR("LWO2: Clip referrer index is out of range"); + clip.clipRef = 0; + } + + Clip &dest = mClips[clip.clipRef]; + if (Clip::REF == dest.type) { + ASSIMP_LOG_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 + ASSIMP_LOG_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. + const size_t vertexLen = 12; + if ((length % vertexLen) != 0) { + throw DeadlyImportError("LWO2: Points chunk length is not multiple of vertexLen (12)"); + } + 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, UINT_MAX); + } else + mCurLayer->mTempPoints.resize(regularSize); + + // perform endianness 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 won't process it) + case AI_LWO_MBAL: + ASSIMP_LOG_WARN("LWO2: Encountered unsupported primitive chunk (METABALL)"); + break; + case AI_LWO_CURV: + ASSIMP_LOG_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 ... + ASSIMP_LOG_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--) { + uint16_t numIndices; + ::memcpy(&numIndices, cursor++, 2); + AI_LSWAP2(numIndices); + 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++; + uint16_t numIndices; + ::memcpy(&numIndices, cursor++, 2); + AI_LSWAP2(numIndices); + face.mNumIndices = numIndices & 0x03FF; + + if (face.mNumIndices) /* 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()) { + ASSIMP_LOG_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()) { + ASSIMP_LOG_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 (auto &elem : list) { + if (elem.name == name) { + if (!perPoly) { + ASSIMP_LOG_WARN("LWO2: Found two VMAP sections with equal names"); + } + return &elem; + } + } + 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 (auto &elem : list) { + CreateNewEntry(elem, srcIdx); + } +} + +// ------------------------------------------------------------------------------------------------ +inline void LWOImporter::DoRecursiveVMAPAssignment(VMapEntry *base, unsigned int numRead, + unsigned int idx, float *data) { + ai_assert(nullptr != data); + LWO::ReferrerList &refList = mCurLayer->mPointReferrers; + unsigned int i; + + if (idx >= base->abAssigned.size()) { + throw DeadlyImportError("Bad index"); + } + base->abAssigned[idx] = true; + for (i = 0; i < numRead; ++i) { + base->rawData[idx * base->dims + i] = data[i]; + } + + if (UINT_MAX != (i = refList[idx])) { + DoRecursiveVMAPAssignment(base, numRead, i, data); + } +} + +// ------------------------------------------------------------------------------------------------ +inline void AddToSingleLinkedList(ReferrerList &refList, unsigned int srcIdx, unsigned int destIdx) { + if (UINT_MAX == 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) { + ASSIMP_LOG_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) { + ASSIMP_LOG_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) { + ASSIMP_LOG_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; + + ASSIMP_LOG_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). + } + ASSIMP_LOG_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; + + 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) { + ASSIMP_LOG_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) { + ASSIMP_LOG_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]) != UINT_MAX); + if (tmp == UINT_MAX) { + continue; + } + + had = true; + refList.resize(refList.size() + 1, UINT_MAX); + + 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) { + ASSIMP_LOG_WARN("LWO2: Failure evaluating VMAD entry \'", name, "\', vertex index wasn't found in that polygon"); + ai_assert(had); + } + } + } + + std::unique_ptr<float[]> temp(new float[type]); + for (unsigned int l = 0; l < type; ++l) + temp[l] = GetF4(); + + DoRecursiveVMAPAssignment(base, type, idx, temp.get()); + 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 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::ostringstream ss; + GetS0(s, head.length); + + head.length -= (uint16_t)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: + ASSIMP_LOG_WARN("LWO2: Color shifted images are not supported"); + break; + + case AI_LWO_ANIM: + ASSIMP_LOG_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: + ASSIMP_LOG_WARN("LWO2: Encountered unknown CLIP sub-chunk"); + } +} + +// ------------------------------------------------------------------------------------------------ +// 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 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) + ASSIMP_LOG_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: + ASSIMP_LOG_WARN("LWO2: Unknown interval interpolation mode"); + }; + + // todo ... read params + } + break; + } + + default: + ASSIMP_LOG_WARN("LWO2: Encountered unknown ENVL subchunk"); + break; + } + // 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; + unsigned int iUnnamed = 0; + while (true) { + if (mFileBuffer + sizeof(IFF::ChunkHeader) > end) break; + const IFF::ChunkHeader 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; + + if (!head.length) { + mFileBuffer = next; + continue; + } + + 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); + + // layer index. + layer.mIndex = GetU2(); + + // Continue loading this layer or ignore it? Check the layer index property + if (UINT_MAX != configLayerIndex && (configLayerIndex - 1) != layer.mIndex) { + skip = true; + } else + skip = false; + + // 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 + ::ai_snprintf(buffer, 128, "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(); + else + layer.mParent = (uint16_t) -1; + + // Set layer skip parameter + layer.skip = skip; + + 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()) { + ASSIMP_LOG_WARN("LWO2: Unexpected VMAD chunk"); + break; + } + // --- intentionally no break here + case AI_LWO_VMAP: { + if (skip) + break; + + if (mCurLayer->mTempPoints.empty()) + ASSIMP_LOG_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()) { + ASSIMP_LOG_WARN("LWO2: Unexpected PTAG"); + } else { + LoadLWO2PolygonTags(head.length); + } + break; + } + // list of tags + case AI_LWO_TAGS: { + if (!mTags->empty()) { + ASSIMP_LOG_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 |