/* --------------------------------------------------------------------------- Open Asset Import Library (assimp) --------------------------------------------------------------------------- Copyright (c) 2006-2020, 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 LWSLoader.cpp * @brief Implementation of the LWS importer class */ #ifndef ASSIMP_BUILD_NO_LWS_IMPORTER #include "AssetLib/LWS/LWSLoader.h" #include "Common/Importer.h" #include "PostProcessing/ConvertToLHProcess.h" #include #include #include #include #include #include #include #include #include #include using namespace Assimp; static const aiImporterDesc desc = { "LightWave Scene Importer", "", "", "http://www.newtek.com/lightwave.html=", aiImporterFlags_SupportTextFlavour, 0, 0, 0, 0, "lws mot" }; // ------------------------------------------------------------------------------------------------ // Recursive parsing of LWS files void LWS::Element::Parse(const char *&buffer) { for (; SkipSpacesAndLineEnd(&buffer); SkipLine(&buffer)) { // begin of a new element with children bool sub = false; if (*buffer == '{') { ++buffer; SkipSpaces(&buffer); sub = true; } else if (*buffer == '}') return; children.push_back(Element()); // copy data line - read token per token const char *cur = buffer; while (!IsSpaceOrNewLine(*buffer)) ++buffer; children.back().tokens[0] = std::string(cur, (size_t)(buffer - cur)); SkipSpaces(&buffer); if (children.back().tokens[0] == "Plugin") { ASSIMP_LOG_DEBUG("LWS: Skipping over plugin-specific data"); // strange stuff inside Plugin/Endplugin blocks. Needn't // follow LWS syntax, so we skip over it for (; SkipSpacesAndLineEnd(&buffer); SkipLine(&buffer)) { if (!::strncmp(buffer, "EndPlugin", 9)) { //SkipLine(&buffer); break; } } continue; } cur = buffer; while (!IsLineEnd(*buffer)) { ++buffer; } children.back().tokens[1] = std::string(cur, (size_t)(buffer - cur)); // parse more elements recursively if (sub) { children.back().Parse(buffer); } } } // ------------------------------------------------------------------------------------------------ // Constructor to be privately used by Importer LWSImporter::LWSImporter() : configSpeedFlag(), io(), first(), last(), fps(), noSkeletonMesh() { // nothing to do here } // ------------------------------------------------------------------------------------------------ // Destructor, private as well LWSImporter::~LWSImporter() { // nothing to do here } // ------------------------------------------------------------------------------------------------ // Returns whether the class can handle the format of the given file. bool LWSImporter::CanRead(const std::string &pFile, IOSystem *pIOHandler, bool checkSig) const { const std::string extension = GetExtension(pFile); if (extension == "lws" || extension == "mot") { return true; } // if check for extension is not enough, check for the magic tokens LWSC and LWMO if (!extension.length() || checkSig) { uint32_t tokens[2]; tokens[0] = AI_MAKE_MAGIC("LWSC"); tokens[1] = AI_MAKE_MAGIC("LWMO"); return CheckMagicToken(pIOHandler, pFile, tokens, 2); } return false; } // ------------------------------------------------------------------------------------------------ // Get list of file extensions const aiImporterDesc *LWSImporter::GetInfo() const { return &desc; } // ------------------------------------------------------------------------------------------------ // Setup configuration properties void LWSImporter::SetupProperties(const Importer *pImp) { // AI_CONFIG_FAVOUR_SPEED configSpeedFlag = (0 != pImp->GetPropertyInteger(AI_CONFIG_FAVOUR_SPEED, 0)); // AI_CONFIG_IMPORT_LWS_ANIM_START first = pImp->GetPropertyInteger(AI_CONFIG_IMPORT_LWS_ANIM_START, 150392 /* magic hack */); // AI_CONFIG_IMPORT_LWS_ANIM_END last = pImp->GetPropertyInteger(AI_CONFIG_IMPORT_LWS_ANIM_END, 150392 /* magic hack */); if (last < first) { std::swap(last, first); } noSkeletonMesh = pImp->GetPropertyInteger(AI_CONFIG_IMPORT_NO_SKELETON_MESHES, 0) != 0; } // ------------------------------------------------------------------------------------------------ // Read an envelope description void LWSImporter::ReadEnvelope(const LWS::Element &dad, LWO::Envelope &fill) { if (dad.children.empty()) { ASSIMP_LOG_ERROR("LWS: Envelope descriptions must not be empty"); return; } // reserve enough storage std::list::const_iterator it = dad.children.begin(); fill.keys.reserve(strtoul10(it->tokens[1].c_str())); for (++it; it != dad.children.end(); ++it) { const char *c = (*it).tokens[1].c_str(); if ((*it).tokens[0] == "Key") { fill.keys.push_back(LWO::Key()); LWO::Key &key = fill.keys.back(); float f; SkipSpaces(&c); c = fast_atoreal_move(c, key.value); SkipSpaces(&c); c = fast_atoreal_move(c, f); key.time = f; unsigned int span = strtoul10(c, &c), num = 0; switch (span) { case 0: key.inter = LWO::IT_TCB; num = 5; break; case 1: case 2: key.inter = LWO::IT_HERM; num = 5; break; case 3: key.inter = LWO::IT_LINE; num = 0; break; case 4: key.inter = LWO::IT_STEP; num = 0; break; case 5: key.inter = LWO::IT_BEZ2; num = 4; break; default: ASSIMP_LOG_ERROR("LWS: Unknown span type"); } for (unsigned int i = 0; i < num; ++i) { SkipSpaces(&c); c = fast_atoreal_move(c, key.params[i]); } } else if ((*it).tokens[0] == "Behaviors") { SkipSpaces(&c); fill.pre = (LWO::PrePostBehaviour)strtoul10(c, &c); SkipSpaces(&c); fill.post = (LWO::PrePostBehaviour)strtoul10(c, &c); } } } // ------------------------------------------------------------------------------------------------ // Read animation channels in the old LightWave animation format void LWSImporter::ReadEnvelope_Old( std::list::const_iterator &it, const std::list::const_iterator &end, LWS::NodeDesc &nodes, unsigned int /*version*/) { unsigned int num, sub_num; if (++it == end) goto unexpected_end; num = strtoul10((*it).tokens[0].c_str()); for (unsigned int i = 0; i < num; ++i) { nodes.channels.push_back(LWO::Envelope()); LWO::Envelope &envl = nodes.channels.back(); envl.index = i; envl.type = (LWO::EnvelopeType)(i + 1); if (++it == end) { goto unexpected_end; } sub_num = strtoul10((*it).tokens[0].c_str()); for (unsigned int n = 0; n < sub_num; ++n) { if (++it == end) goto unexpected_end; // parse value and time, skip the rest for the moment. LWO::Key key; const char *c = fast_atoreal_move((*it).tokens[0].c_str(), key.value); SkipSpaces(&c); float f; fast_atoreal_move((*it).tokens[0].c_str(), f); key.time = f; envl.keys.push_back(key); } } return; unexpected_end: ASSIMP_LOG_ERROR("LWS: Encountered unexpected end of file while parsing object motion"); } // ------------------------------------------------------------------------------------------------ // Setup a nice name for a node void LWSImporter::SetupNodeName(aiNode *nd, LWS::NodeDesc &src) { const unsigned int combined = src.number | ((unsigned int)src.type) << 28u; // the name depends on the type. We break LWS's strange naming convention // and return human-readable, but still machine-parsable and unique, strings. if (src.type == LWS::NodeDesc::OBJECT) { if (src.path.length()) { std::string::size_type s = src.path.find_last_of("\\/"); if (s == std::string::npos) { s = 0; } else { ++s; } std::string::size_type t = src.path.substr(s).find_last_of("."); nd->mName.length = ::ai_snprintf(nd->mName.data, MAXLEN, "%s_(%08X)", src.path.substr(s).substr(0, t).c_str(), combined); return; } } nd->mName.length = ::ai_snprintf(nd->mName.data, MAXLEN, "%s_(%08X)", src.name, combined); } // ------------------------------------------------------------------------------------------------ // Recursively build the scene-graph void LWSImporter::BuildGraph(aiNode *nd, LWS::NodeDesc &src, std::vector &attach, BatchLoader &batch, aiCamera **&camOut, aiLight **&lightOut, std::vector &animOut) { // Setup a very cryptic name for the node, we want the user to be happy SetupNodeName(nd, src); aiNode *ndAnim = nd; // If the node is an object if (src.type == LWS::NodeDesc::OBJECT) { // If the object is from an external file, get it aiScene *obj = NULL; if (src.path.length()) { obj = batch.GetImport(src.id); if (!obj) { ASSIMP_LOG_ERROR("LWS: Failed to read external file " + src.path); } else { if (obj->mRootNode->mNumChildren == 1) { //If the pivot is not set for this layer, get it from the external object if (!src.isPivotSet) { src.pivotPos.x = +obj->mRootNode->mTransformation.a4; src.pivotPos.y = +obj->mRootNode->mTransformation.b4; src.pivotPos.z = -obj->mRootNode->mTransformation.c4; //The sign is the RH to LH back conversion } //Remove first node from obj (the old pivot), reset transform of second node (the mesh node) aiNode *newRootNode = obj->mRootNode->mChildren[0]; obj->mRootNode->mChildren[0] = NULL; delete obj->mRootNode; obj->mRootNode = newRootNode; obj->mRootNode->mTransformation.a4 = 0.0; obj->mRootNode->mTransformation.b4 = 0.0; obj->mRootNode->mTransformation.c4 = 0.0; } } } //Setup the pivot node (also the animation node), the one we received nd->mName = std::string("Pivot:") + nd->mName.data; ndAnim = nd; //Add the attachment node to it nd->mNumChildren = 1; nd->mChildren = new aiNode *[1]; nd->mChildren[0] = new aiNode(); nd->mChildren[0]->mParent = nd; nd->mChildren[0]->mTransformation.a4 = -src.pivotPos.x; nd->mChildren[0]->mTransformation.b4 = -src.pivotPos.y; nd->mChildren[0]->mTransformation.c4 = -src.pivotPos.z; SetupNodeName(nd->mChildren[0], src); //Update the attachment node nd = nd->mChildren[0]; //Push attachment, if the object came from an external file if (obj) { attach.push_back(AttachmentInfo(obj, nd)); } } // If object is a light source - setup a corresponding ai structure else if (src.type == LWS::NodeDesc::LIGHT) { aiLight *lit = *lightOut++ = new aiLight(); // compute final light color lit->mColorDiffuse = lit->mColorSpecular = src.lightColor * src.lightIntensity; // name to attach light to node -> unique due to LWs indexing system lit->mName = nd->mName; // determine light type and setup additional members if (src.lightType == 2) { /* spot light */ lit->mType = aiLightSource_SPOT; lit->mAngleInnerCone = (float)AI_DEG_TO_RAD(src.lightConeAngle); lit->mAngleOuterCone = lit->mAngleInnerCone + (float)AI_DEG_TO_RAD(src.lightEdgeAngle); } else if (src.lightType == 1) { /* directional light source */ lit->mType = aiLightSource_DIRECTIONAL; } else { lit->mType = aiLightSource_POINT; } // fixme: no proper handling of light falloffs yet if (src.lightFalloffType == 1) { lit->mAttenuationConstant = 1.f; } else if (src.lightFalloffType == 2) { lit->mAttenuationLinear = 1.f; } else { lit->mAttenuationQuadratic = 1.f; } } else if (src.type == LWS::NodeDesc::CAMERA) { // If object is a camera - setup a corresponding ai structure aiCamera *cam = *camOut++ = new aiCamera(); // name to attach cam to node -> unique due to LWs indexing system cam->mName = nd->mName; } // Get the node transformation from the LWO key LWO::AnimResolver resolver(src.channels, fps); resolver.ExtractBindPose(ndAnim->mTransformation); // .. and construct animation channels aiNodeAnim *anim = nullptr; if (first != last) { resolver.SetAnimationRange(first, last); resolver.ExtractAnimChannel(&anim, AI_LWO_ANIM_FLAG_SAMPLE_ANIMS | AI_LWO_ANIM_FLAG_START_AT_ZERO); if (anim) { anim->mNodeName = ndAnim->mName; animOut.push_back(anim); } } // Add children if (!src.children.empty()) { nd->mChildren = new aiNode *[src.children.size()]; for (std::list::iterator it = src.children.begin(); it != src.children.end(); ++it) { aiNode *ndd = nd->mChildren[nd->mNumChildren++] = new aiNode(); ndd->mParent = nd; BuildGraph(ndd, **it, attach, batch, camOut, lightOut, animOut); } } } // ------------------------------------------------------------------------------------------------ // Determine the exact location of a LWO file std::string LWSImporter::FindLWOFile(const std::string &in) { // insert missing directory separator if necessary std::string tmp(in); if (in.length() > 3 && in[1] == ':' && in[2] != '\\' && in[2] != '/') { tmp = in[0] + (std::string(":\\") + in.substr(2)); } if (io->Exists(tmp)) { return in; } // file is not accessible for us ... maybe it's packed by // LightWave's 'Package Scene' command? // Relevant for us are the following two directories: // \Objects\\<*>.lwo // \Scenes\\<*>.lws // where is optional. std::string test = std::string("..") + (io->getOsSeparator() + tmp); if (io->Exists(test)) { return test; } test = std::string("..") + (io->getOsSeparator() + test); if (io->Exists(test)) { return test; } // return original path, maybe the IOsystem knows better return tmp; } // ------------------------------------------------------------------------------------------------ // Read file into given scene data structure void LWSImporter::InternReadFile(const std::string &pFile, aiScene *pScene, IOSystem *pIOHandler) { io = pIOHandler; std::unique_ptr file(pIOHandler->Open(pFile, "rb")); // Check whether we can read from the file if (file.get() == nullptr) { throw DeadlyImportError("Failed to open LWS file " + pFile + "."); } // Allocate storage and copy the contents of the file to a memory buffer std::vector mBuffer; TextFileToBuffer(file.get(), mBuffer); // Parse the file structure LWS::Element root; const char *dummy = &mBuffer[0]; root.Parse(dummy); // Construct a Batch-importer to read more files recursively BatchLoader batch(pIOHandler); // Construct an array to receive the flat output graph std::list nodes; unsigned int cur_light = 0, cur_camera = 0, cur_object = 0; unsigned int num_light = 0, num_camera = 0, num_object = 0; // check magic identifier, 'LWSC' bool motion_file = false; std::list::const_iterator it = root.children.begin(); if ((*it).tokens[0] == "LWMO") { motion_file = true; } if ((*it).tokens[0] != "LWSC" && !motion_file) { throw DeadlyImportError("LWS: Not a LightWave scene, magic tag LWSC not found"); } // get file format version and print to log ++it; unsigned int version = strtoul10((*it).tokens[0].c_str()); ASSIMP_LOG_INFO("LWS file format version is " + (*it).tokens[0]); first = 0.; last = 60.; fps = 25.; // seems to be a good default frame rate // Now read all elements in a very straightforward manner for (; it != root.children.end(); ++it) { const char *c = (*it).tokens[1].c_str(); // 'FirstFrame': begin of animation slice if ((*it).tokens[0] == "FirstFrame") { // see SetupProperties() if (150392. != first ) { first = strtoul10(c, &c) - 1.; // we're zero-based } } else if ((*it).tokens[0] == "LastFrame") { // 'LastFrame': end of animation slice // see SetupProperties() if (150392. != last ) { last = strtoul10(c, &c) - 1.; // we're zero-based } } else if ((*it).tokens[0] == "FramesPerSecond") { // 'FramesPerSecond': frames per second fps = strtoul10(c, &c); } else if ((*it).tokens[0] == "LoadObjectLayer") { // 'LoadObjectLayer': load a layer of a specific LWO file // get layer index const int layer = strtoul10(c, &c); // setup the layer to be loaded BatchLoader::PropertyMap props; SetGenericProperty(props.ints, AI_CONFIG_IMPORT_LWO_ONE_LAYER_ONLY, layer); // add node to list LWS::NodeDesc d; d.type = LWS::NodeDesc::OBJECT; if (version >= 4) { // handle LWSC 4 explicit ID SkipSpaces(&c); d.number = strtoul16(c, &c) & AI_LWS_MASK; } else { d.number = cur_object++; } // and add the file to the import list SkipSpaces(&c); std::string path = FindLWOFile(c); d.path = path; d.id = batch.AddLoadRequest(path, 0, &props); nodes.push_back(d); ++num_object; } else if ((*it).tokens[0] == "LoadObject") { // 'LoadObject': load a LWO file into the scene-graph // add node to list LWS::NodeDesc d; d.type = LWS::NodeDesc::OBJECT; if (version >= 4) { // handle LWSC 4 explicit ID d.number = strtoul16(c, &c) & AI_LWS_MASK; SkipSpaces(&c); } else { d.number = cur_object++; } std::string path = FindLWOFile(c); d.id = batch.AddLoadRequest(path, 0, NULL); d.path = path; nodes.push_back(d); ++num_object; } else if ((*it).tokens[0] == "AddNullObject") { // 'AddNullObject': add a dummy node to the hierarchy // add node to list LWS::NodeDesc d; d.type = LWS::NodeDesc::OBJECT; if (version >= 4) { // handle LWSC 4 explicit ID d.number = strtoul16(c, &c) & AI_LWS_MASK; SkipSpaces(&c); } else { d.number = cur_object++; } d.name = c; nodes.push_back(d); num_object++; } // 'NumChannels': Number of envelope channels assigned to last layer else if ((*it).tokens[0] == "NumChannels") { // ignore for now } // 'Channel': preceedes any envelope description else if ((*it).tokens[0] == "Channel") { if (nodes.empty()) { if (motion_file) { // LightWave motion file. Add dummy node LWS::NodeDesc d; d.type = LWS::NodeDesc::OBJECT; d.name = c; d.number = cur_object++; nodes.push_back(d); } ASSIMP_LOG_ERROR("LWS: Unexpected keyword: \'Channel\'"); } // important: index of channel nodes.back().channels.push_back(LWO::Envelope()); LWO::Envelope &env = nodes.back().channels.back(); env.index = strtoul10(c); // currently we can just interpret the standard channels 0...9 // (hack) assume that index-i yields the binary channel type from LWO env.type = (LWO::EnvelopeType)(env.index + 1); } // 'Envelope': a single animation channel else if ((*it).tokens[0] == "Envelope") { if (nodes.empty() || nodes.back().channels.empty()) ASSIMP_LOG_ERROR("LWS: Unexpected keyword: \'Envelope\'"); else { ReadEnvelope((*it), nodes.back().channels.back()); } } // 'ObjectMotion': animation information for older lightwave formats else if (version < 3 && ((*it).tokens[0] == "ObjectMotion" || (*it).tokens[0] == "CameraMotion" || (*it).tokens[0] == "LightMotion")) { if (nodes.empty()) ASSIMP_LOG_ERROR("LWS: Unexpected keyword: \'Motion\'"); else { ReadEnvelope_Old(it, root.children.end(), nodes.back(), version); } } // 'Pre/PostBehavior': pre/post animation behaviour for LWSC 2 else if (version == 2 && (*it).tokens[0] == "Pre/PostBehavior") { if (nodes.empty()) ASSIMP_LOG_ERROR("LWS: Unexpected keyword: \'Pre/PostBehavior'"); else { for (std::list::iterator envelopeIt = nodes.back().channels.begin(); envelopeIt != nodes.back().channels.end(); ++envelopeIt) { // two ints per envelope LWO::Envelope &env = *envelopeIt; env.pre = (LWO::PrePostBehaviour)strtoul10(c, &c); SkipSpaces(&c); env.post = (LWO::PrePostBehaviour)strtoul10(c, &c); SkipSpaces(&c); } } } // 'ParentItem': specifies the parent of the current element else if ((*it).tokens[0] == "ParentItem") { if (nodes.empty()) ASSIMP_LOG_ERROR("LWS: Unexpected keyword: \'ParentItem\'"); else nodes.back().parent = strtoul16(c, &c); } // 'ParentObject': deprecated one for older formats else if (version < 3 && (*it).tokens[0] == "ParentObject") { if (nodes.empty()) ASSIMP_LOG_ERROR("LWS: Unexpected keyword: \'ParentObject\'"); else { nodes.back().parent = strtoul10(c, &c) | (1u << 28u); } } // 'AddCamera': add a camera to the scenegraph else if ((*it).tokens[0] == "AddCamera") { // add node to list LWS::NodeDesc d; d.type = LWS::NodeDesc::CAMERA; if (version >= 4) { // handle LWSC 4 explicit ID d.number = strtoul16(c, &c) & AI_LWS_MASK; } else d.number = cur_camera++; nodes.push_back(d); num_camera++; } // 'CameraName': set name of currently active camera else if ((*it).tokens[0] == "CameraName") { if (nodes.empty() || nodes.back().type != LWS::NodeDesc::CAMERA) ASSIMP_LOG_ERROR("LWS: Unexpected keyword: \'CameraName\'"); else nodes.back().name = c; } // 'AddLight': add a light to the scenegraph else if ((*it).tokens[0] == "AddLight") { // add node to list LWS::NodeDesc d; d.type = LWS::NodeDesc::LIGHT; if (version >= 4) { // handle LWSC 4 explicit ID d.number = strtoul16(c, &c) & AI_LWS_MASK; } else d.number = cur_light++; nodes.push_back(d); num_light++; } // 'LightName': set name of currently active light else if ((*it).tokens[0] == "LightName") { if (nodes.empty() || nodes.back().type != LWS::NodeDesc::LIGHT) ASSIMP_LOG_ERROR("LWS: Unexpected keyword: \'LightName\'"); else nodes.back().name = c; } // 'LightIntensity': set intensity of currently active light else if ((*it).tokens[0] == "LightIntensity" || (*it).tokens[0] == "LgtIntensity") { if (nodes.empty() || nodes.back().type != LWS::NodeDesc::LIGHT) ASSIMP_LOG_ERROR("LWS: Unexpected keyword: \'LightIntensity\'"); else fast_atoreal_move(c, nodes.back().lightIntensity); } // 'LightType': set type of currently active light else if ((*it).tokens[0] == "LightType") { if (nodes.empty() || nodes.back().type != LWS::NodeDesc::LIGHT) ASSIMP_LOG_ERROR("LWS: Unexpected keyword: \'LightType\'"); else nodes.back().lightType = strtoul10(c); } // 'LightFalloffType': set falloff type of currently active light else if ((*it).tokens[0] == "LightFalloffType") { if (nodes.empty() || nodes.back().type != LWS::NodeDesc::LIGHT) ASSIMP_LOG_ERROR("LWS: Unexpected keyword: \'LightFalloffType\'"); else nodes.back().lightFalloffType = strtoul10(c); } // 'LightConeAngle': set cone angle of currently active light else if ((*it).tokens[0] == "LightConeAngle") { if (nodes.empty() || nodes.back().type != LWS::NodeDesc::LIGHT) ASSIMP_LOG_ERROR("LWS: Unexpected keyword: \'LightConeAngle\'"); else nodes.back().lightConeAngle = fast_atof(c); } // 'LightEdgeAngle': set area where we're smoothing from min to max intensity else if ((*it).tokens[0] == "LightEdgeAngle") { if (nodes.empty() || nodes.back().type != LWS::NodeDesc::LIGHT) ASSIMP_LOG_ERROR("LWS: Unexpected keyword: \'LightEdgeAngle\'"); else nodes.back().lightEdgeAngle = fast_atof(c); } // 'LightColor': set color of currently active light else if ((*it).tokens[0] == "LightColor") { if (nodes.empty() || nodes.back().type != LWS::NodeDesc::LIGHT) ASSIMP_LOG_ERROR("LWS: Unexpected keyword: \'LightColor\'"); else { c = fast_atoreal_move(c, (float &)nodes.back().lightColor.r); SkipSpaces(&c); c = fast_atoreal_move(c, (float &)nodes.back().lightColor.g); SkipSpaces(&c); c = fast_atoreal_move(c, (float &)nodes.back().lightColor.b); } } // 'PivotPosition': position of local transformation origin else if ((*it).tokens[0] == "PivotPosition" || (*it).tokens[0] == "PivotPoint") { if (nodes.empty()) ASSIMP_LOG_ERROR("LWS: Unexpected keyword: \'PivotPosition\'"); else { c = fast_atoreal_move(c, (float &)nodes.back().pivotPos.x); SkipSpaces(&c); c = fast_atoreal_move(c, (float &)nodes.back().pivotPos.y); SkipSpaces(&c); c = fast_atoreal_move(c, (float &)nodes.back().pivotPos.z); // Mark pivotPos as set nodes.back().isPivotSet = true; } } } // resolve parenting for (std::list::iterator ndIt = nodes.begin(); ndIt != nodes.end(); ++ndIt) { // check whether there is another node which calls us a parent for (std::list::iterator dit = nodes.begin(); dit != nodes.end(); ++dit) { if (dit != ndIt && *ndIt == (*dit).parent) { if ((*dit).parent_resolved) { // fixme: it's still possible to produce an overflow due to cross references .. ASSIMP_LOG_ERROR("LWS: Found cross reference in scene-graph"); continue; } ndIt->children.push_back(&*dit); (*dit).parent_resolved = &*ndIt; } } } // find out how many nodes have no parent yet unsigned int no_parent = 0; for (std::list::iterator ndIt = nodes.begin(); ndIt != nodes.end(); ++ndIt) { if (!ndIt->parent_resolved) { ++no_parent; } } if (!no_parent) { throw DeadlyImportError("LWS: Unable to find scene root node"); } // Load all subsequent files batch.LoadAll(); // and build the final output graph by attaching the loaded external // files to ourselves. first build a master graph aiScene *master = new aiScene(); aiNode *nd = master->mRootNode = new aiNode(); // allocate storage for cameras&lights if (num_camera) { master->mCameras = new aiCamera *[master->mNumCameras = num_camera]; } aiCamera **cams = master->mCameras; if (num_light) { master->mLights = new aiLight *[master->mNumLights = num_light]; } aiLight **lights = master->mLights; std::vector attach; std::vector anims; nd->mName.Set(""); nd->mChildren = new aiNode *[no_parent]; for (std::list::iterator ndIt = nodes.begin(); ndIt != nodes.end(); ++ndIt) { if (!ndIt->parent_resolved) { aiNode *ro = nd->mChildren[nd->mNumChildren++] = new aiNode(); ro->mParent = nd; // ... and build the scene graph. If we encounter object nodes, // add then to our attachment table. BuildGraph(ro, *ndIt, attach, batch, cams, lights, anims); } } // create a master animation channel for us if (anims.size()) { master->mAnimations = new aiAnimation *[master->mNumAnimations = 1]; aiAnimation *anim = master->mAnimations[0] = new aiAnimation(); anim->mName.Set("LWSMasterAnim"); // LWS uses seconds as time units, but we convert to frames anim->mTicksPerSecond = fps; anim->mDuration = last - (first - 1); /* fixme ... zero or one-based?*/ anim->mChannels = new aiNodeAnim *[anim->mNumChannels = static_cast(anims.size())]; std::copy(anims.begin(), anims.end(), anim->mChannels); } // convert the master scene to RH MakeLeftHandedProcess monster_cheat; monster_cheat.Execute(master); // .. ccw FlipWindingOrderProcess flipper; flipper.Execute(master); // OK ... finally build the output graph SceneCombiner::MergeScenes(&pScene, master, attach, AI_INT_MERGE_SCENE_GEN_UNIQUE_NAMES | (!configSpeedFlag ? ( AI_INT_MERGE_SCENE_GEN_UNIQUE_NAMES_IF_NECESSARY | AI_INT_MERGE_SCENE_GEN_UNIQUE_MATNAMES) : 0)); // Check flags if (!pScene->mNumMeshes || !pScene->mNumMaterials) { pScene->mFlags |= AI_SCENE_FLAGS_INCOMPLETE; if (pScene->mNumAnimations && !noSkeletonMesh) { // construct skeleton mesh SkeletonMeshBuilder builder(pScene); } } } #endif // !! ASSIMP_BUILD_NO_LWS_IMPORTER