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Diffstat (limited to 'src/mesh/assimp-master/code/AssetLib/FBX/FBXExporter.cpp')
| -rw-r--r-- | src/mesh/assimp-master/code/AssetLib/FBX/FBXExporter.cpp | 2799 |
1 files changed, 0 insertions, 2799 deletions
diff --git a/src/mesh/assimp-master/code/AssetLib/FBX/FBXExporter.cpp b/src/mesh/assimp-master/code/AssetLib/FBX/FBXExporter.cpp deleted file mode 100644 index 6956728..0000000 --- a/src/mesh/assimp-master/code/AssetLib/FBX/FBXExporter.cpp +++ /dev/null @@ -1,2799 +0,0 @@ -/* -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. - ----------------------------------------------------------------------- -*/ -#ifndef ASSIMP_BUILD_NO_EXPORT -#ifndef ASSIMP_BUILD_NO_FBX_EXPORTER - -#include "FBXExporter.h" -#include "FBXExportNode.h" -#include "FBXExportProperty.h" -#include "FBXCommon.h" -#include "FBXUtil.h" - -#include <assimp/version.h> // aiGetVersion -#include <assimp/IOSystem.hpp> -#include <assimp/Exporter.hpp> -#include <assimp/DefaultLogger.hpp> -#include <assimp/StreamWriter.h> // StreamWriterLE -#include <assimp/Exceptional.h> // DeadlyExportError -#include <assimp/material.h> // aiTextureType -#include <assimp/scene.h> -#include <assimp/mesh.h> - -// Header files, standard library. -#include <memory> // shared_ptr -#include <string> -#include <sstream> // stringstream -#include <ctime> // localtime, tm_* -#include <map> -#include <set> -#include <vector> -#include <array> -#include <unordered_set> -#include <numeric> - -// RESOURCES: -// https://code.blender.org/2013/08/fbx-binary-file-format-specification/ -// https://wiki.blender.org/index.php/User:Mont29/Foundation/FBX_File_Structure - -const ai_real DEG = ai_real( 57.29577951308232087679815481 ); // degrees per radian - -using namespace Assimp; -using namespace Assimp::FBX; - -// some constants that we'll use for writing metadata -namespace Assimp { -namespace FBX { - const std::string EXPORT_VERSION_STR = "7.5.0"; - const uint32_t EXPORT_VERSION_INT = 7500; // 7.5 == 2016+ - // FBX files have some hashed values that depend on the creation time field, - // but for now we don't actually know how to generate these. - // what we can do is set them to a known-working version. - // this is the data that Blender uses in their FBX export process. - const std::string GENERIC_CTIME = "1970-01-01 10:00:00:000"; - const std::string GENERIC_FILEID = - "\x28\xb3\x2a\xeb\xb6\x24\xcc\xc2\xbf\xc8\xb0\x2a\xa9\x2b\xfc\xf1"; - const std::string GENERIC_FOOTID = - "\xfa\xbc\xab\x09\xd0\xc8\xd4\x66\xb1\x76\xfb\x83\x1c\xf7\x26\x7e"; - const std::string FOOT_MAGIC = - "\xf8\x5a\x8c\x6a\xde\xf5\xd9\x7e\xec\xe9\x0c\xe3\x75\x8f\x29\x0b"; - const std::string COMMENT_UNDERLINE = - ";------------------------------------------------------------------"; -} - - // --------------------------------------------------------------------- - // Worker function for exporting a scene to binary FBX. - // Prototyped and registered in Exporter.cpp - void ExportSceneFBX ( - const char* pFile, - IOSystem* pIOSystem, - const aiScene* pScene, - const ExportProperties* pProperties - ){ - // initialize the exporter - FBXExporter exporter(pScene, pProperties); - - // perform binary export - exporter.ExportBinary(pFile, pIOSystem); - } - - // --------------------------------------------------------------------- - // Worker function for exporting a scene to ASCII FBX. - // Prototyped and registered in Exporter.cpp - void ExportSceneFBXA ( - const char* pFile, - IOSystem* pIOSystem, - const aiScene* pScene, - const ExportProperties* pProperties - - ){ - // initialize the exporter - FBXExporter exporter(pScene, pProperties); - - // perform ascii export - exporter.ExportAscii(pFile, pIOSystem); - } - -} // end of namespace Assimp - -FBXExporter::FBXExporter ( const aiScene* pScene, const ExportProperties* pProperties ) -: binary(false) -, mScene(pScene) -, mProperties(pProperties) -, outfile() -, connections() -, mesh_uids() -, material_uids() -, node_uids() { - // will probably need to determine UIDs, connections, etc here. - // basically anything that needs to be known - // before we start writing sections to the stream. -} - -void FBXExporter::ExportBinary ( - const char* pFile, - IOSystem* pIOSystem -){ - // remember that we're exporting in binary mode - binary = true; - - // we're not currently using these preferences, - // but clang will cry about it if we never touch it. - // TODO: some of these might be relevant to export - (void)mProperties; - - // open the indicated file for writing (in binary mode) - outfile.reset(pIOSystem->Open(pFile,"wb")); - if (!outfile) { - throw DeadlyExportError( - "could not open output .fbx file: " + std::string(pFile) - ); - } - - // first a binary-specific file header - WriteBinaryHeader(); - - // the rest of the file is in node entries. - // we have to serialize each entry before we write to the output, - // as the first thing we write is the byte offset of the _next_ entry. - // Either that or we can skip back to write the offset when we finish. - WriteAllNodes(); - - // finally we have a binary footer to the file - WriteBinaryFooter(); - - // explicitly release file pointer, - // so we don't have to rely on class destruction. - outfile.reset(); -} - -void FBXExporter::ExportAscii ( - const char* pFile, - IOSystem* pIOSystem -){ - // remember that we're exporting in ascii mode - binary = false; - - // open the indicated file for writing in text mode - outfile.reset(pIOSystem->Open(pFile,"wt")); - if (!outfile) { - throw DeadlyExportError( - "could not open output .fbx file: " + std::string(pFile) - ); - } - - // write the ascii header - WriteAsciiHeader(); - - // write all the sections - WriteAllNodes(); - - // make sure the file ends with a newline. - // note: if the file is opened in text mode, - // this should do the right cross-platform thing. - outfile->Write("\n", 1, 1); - - // explicitly release file pointer, - // so we don't have to rely on class destruction. - outfile.reset(); -} - -void FBXExporter::WriteAsciiHeader() -{ - // basically just a comment at the top of the file - std::stringstream head; - head << "; FBX " << EXPORT_VERSION_STR << " project file\n"; - head << "; Created by the Open Asset Import Library (Assimp)\n"; - head << "; http://assimp.org\n"; - head << "; -------------------------------------------------\n"; - const std::string ascii_header = head.str(); - outfile->Write(ascii_header.c_str(), ascii_header.size(), 1); -} - -void FBXExporter::WriteAsciiSectionHeader(const std::string& title) -{ - StreamWriterLE outstream(outfile); - std::stringstream s; - s << "\n\n; " << title << '\n'; - s << FBX::COMMENT_UNDERLINE << "\n"; - outstream.PutString(s.str()); -} - -void FBXExporter::WriteBinaryHeader() -{ - // first a specific sequence of 23 bytes, always the same - const char binary_header[24] = "Kaydara FBX Binary\x20\x20\x00\x1a\x00"; - outfile->Write(binary_header, 1, 23); - - // then FBX version number, "multiplied" by 1000, as little-endian uint32. - // so 7.3 becomes 7300 == 0x841C0000, 7.4 becomes 7400 == 0xE81C0000, etc - { - StreamWriterLE outstream(outfile); - outstream.PutU4(EXPORT_VERSION_INT); - } // StreamWriter destructor writes the data to the file - - // after this the node data starts immediately - // (probably with the FBXHEaderExtension node) -} - -void FBXExporter::WriteBinaryFooter() -{ - outfile->Write(NULL_RECORD.c_str(), NULL_RECORD.size(), 1); - - outfile->Write(GENERIC_FOOTID.c_str(), GENERIC_FOOTID.size(), 1); - - // here some padding is added for alignment to 16 bytes. - // if already aligned, the full 16 bytes is added. - size_t pos = outfile->Tell(); - size_t pad = 16 - (pos % 16); - for (size_t i = 0; i < pad; ++i) { - outfile->Write("\x00", 1, 1); - } - - // not sure what this is, but it seems to always be 0 in modern files - for (size_t i = 0; i < 4; ++i) { - outfile->Write("\x00", 1, 1); - } - - // now the file version again - { - StreamWriterLE outstream(outfile); - outstream.PutU4(EXPORT_VERSION_INT); - } // StreamWriter destructor writes the data to the file - - // and finally some binary footer added to all files - for (size_t i = 0; i < 120; ++i) { - outfile->Write("\x00", 1, 1); - } - outfile->Write(FOOT_MAGIC.c_str(), FOOT_MAGIC.size(), 1); -} - -void FBXExporter::WriteAllNodes () -{ - // header - // (and fileid, creation time, creator, if binary) - WriteHeaderExtension(); - - // global settings - WriteGlobalSettings(); - - // documents - WriteDocuments(); - - // references - WriteReferences(); - - // definitions - WriteDefinitions(); - - // objects - WriteObjects(); - - // connections - WriteConnections(); - - // WriteTakes? (deprecated since at least 2015 (fbx 7.4)) -} - -//FBXHeaderExtension top-level node -void FBXExporter::WriteHeaderExtension () -{ - if (!binary) { - // no title, follows directly from the top comment - } - FBX::Node n("FBXHeaderExtension"); - StreamWriterLE outstream(outfile); - int indent = 0; - - // begin node - n.Begin(outstream, binary, indent); - - // write properties - // (none) - - // finish properties - n.EndProperties(outstream, binary, indent, 0); - - // begin children - n.BeginChildren(outstream, binary, indent); - - indent = 1; - - // write child nodes - FBX::Node::WritePropertyNode( - "FBXHeaderVersion", int32_t(1003), outstream, binary, indent - ); - FBX::Node::WritePropertyNode( - "FBXVersion", int32_t(EXPORT_VERSION_INT), outstream, binary, indent - ); - if (binary) { - FBX::Node::WritePropertyNode( - "EncryptionType", int32_t(0), outstream, binary, indent - ); - } - - FBX::Node CreationTimeStamp("CreationTimeStamp"); - time_t rawtime; - time(&rawtime); - struct tm * now = localtime(&rawtime); - CreationTimeStamp.AddChild("Version", int32_t(1000)); - CreationTimeStamp.AddChild("Year", int32_t(now->tm_year + 1900)); - CreationTimeStamp.AddChild("Month", int32_t(now->tm_mon + 1)); - CreationTimeStamp.AddChild("Day", int32_t(now->tm_mday)); - CreationTimeStamp.AddChild("Hour", int32_t(now->tm_hour)); - CreationTimeStamp.AddChild("Minute", int32_t(now->tm_min)); - CreationTimeStamp.AddChild("Second", int32_t(now->tm_sec)); - CreationTimeStamp.AddChild("Millisecond", int32_t(0)); - CreationTimeStamp.Dump(outstream, binary, indent); - - std::stringstream creator; - creator << "Open Asset Import Library (Assimp) " << aiGetVersionMajor() - << "." << aiGetVersionMinor() << "." << aiGetVersionRevision(); - FBX::Node::WritePropertyNode( - "Creator", creator.str(), outstream, binary, indent - ); - - //FBX::Node sceneinfo("SceneInfo"); - //sceneinfo.AddProperty("GlobalInfo" + FBX::SEPARATOR + "SceneInfo"); - // not sure if any of this is actually needed, - // so just write an empty node for now. - //sceneinfo.Dump(outstream, binary, indent); - - indent = 0; - - // finish node - n.End(outstream, binary, indent, true); - - // that's it for FBXHeaderExtension... - if (!binary) { return; } - - // but binary files also need top-level FileID, CreationTime, Creator: - std::vector<uint8_t> raw(GENERIC_FILEID.size()); - for (size_t i = 0; i < GENERIC_FILEID.size(); ++i) { - raw[i] = uint8_t(GENERIC_FILEID[i]); - } - FBX::Node::WritePropertyNode( - "FileId", raw, outstream, binary, indent - ); - FBX::Node::WritePropertyNode( - "CreationTime", GENERIC_CTIME, outstream, binary, indent - ); - FBX::Node::WritePropertyNode( - "Creator", creator.str(), outstream, binary, indent - ); -} - -// WriteGlobalSettings helpers - -void WritePropInt(const aiScene* scene, FBX::Node& p, const std::string& key, int defaultValue) -{ - int value; - if (scene->mMetaData != nullptr && scene->mMetaData->Get(key, value)) { - p.AddP70int(key, value); - } else { - p.AddP70int(key, defaultValue); - } -} - -void WritePropDouble(const aiScene* scene, FBX::Node& p, const std::string& key, double defaultValue) -{ - double value; - if (scene->mMetaData != nullptr && scene->mMetaData->Get(key, value)) { - p.AddP70double(key, value); - } else { - // fallback lookup float instead - float floatValue; - if (scene->mMetaData != nullptr && scene->mMetaData->Get(key, floatValue)) { - p.AddP70double(key, (double)floatValue); - } else { - p.AddP70double(key, defaultValue); - } - } -} - -void WritePropEnum(const aiScene* scene, FBX::Node& p, const std::string& key, int defaultValue) -{ - int value; - if (scene->mMetaData != nullptr && scene->mMetaData->Get(key, value)) { - p.AddP70enum(key, value); - } else { - p.AddP70enum(key, defaultValue); - } -} - -void WritePropColor(const aiScene* scene, FBX::Node& p, const std::string& key, const aiVector3D& defaultValue) -{ - aiVector3D value; - if (scene->mMetaData != nullptr && scene->mMetaData->Get(key, value)) { - // ai_real can be float or double, cast to avoid warnings - p.AddP70color(key, (double)value.x, (double)value.y, (double)value.z); - } else { - p.AddP70color(key, (double)defaultValue.x, (double)defaultValue.y, (double)defaultValue.z); - } -} - -void WritePropString(const aiScene* scene, FBX::Node& p, const std::string& key, const std::string& defaultValue) -{ - aiString value; // MetaData doesn't hold std::string - if (scene->mMetaData != nullptr && scene->mMetaData->Get(key, value)) { - p.AddP70string(key, value.C_Str()); - } else { - p.AddP70string(key, defaultValue); - } -} - -void FBXExporter::WriteGlobalSettings () -{ - if (!binary) { - // no title, follows directly from the header extension - } - FBX::Node gs("GlobalSettings"); - gs.AddChild("Version", int32_t(1000)); - - FBX::Node p("Properties70"); - WritePropInt(mScene, p, "UpAxis", 1); - WritePropInt(mScene, p, "UpAxisSign", 1); - WritePropInt(mScene, p, "FrontAxis", 2); - WritePropInt(mScene, p, "FrontAxisSign", 1); - WritePropInt(mScene, p, "CoordAxis", 0); - WritePropInt(mScene, p, "CoordAxisSign", 1); - WritePropInt(mScene, p, "OriginalUpAxis", 1); - WritePropInt(mScene, p, "OriginalUpAxisSign", 1); - WritePropDouble(mScene, p, "UnitScaleFactor", 1.0); - WritePropDouble(mScene, p, "OriginalUnitScaleFactor", 1.0); - WritePropColor(mScene, p, "AmbientColor", aiVector3D((ai_real)0.0, (ai_real)0.0, (ai_real)0.0)); - WritePropString(mScene, p,"DefaultCamera", "Producer Perspective"); - WritePropEnum(mScene, p, "TimeMode", 11); - WritePropEnum(mScene, p, "TimeProtocol", 2); - WritePropEnum(mScene, p, "SnapOnFrameMode", 0); - p.AddP70time("TimeSpanStart", 0); // TODO: animation support - p.AddP70time("TimeSpanStop", FBX::SECOND); // TODO: animation support - WritePropDouble(mScene, p, "CustomFrameRate", -1.0); - p.AddP70("TimeMarker", "Compound", "", ""); // not sure what this is - WritePropInt(mScene, p, "CurrentTimeMarker", -1); - gs.AddChild(p); - - gs.Dump(outfile, binary, 0); -} - -void FBXExporter::WriteDocuments () -{ - if (!binary) { - WriteAsciiSectionHeader("Documents Description"); - } - - // not sure what the use of multiple documents would be, - // or whether any end-application supports it - FBX::Node docs("Documents"); - docs.AddChild("Count", int32_t(1)); - FBX::Node doc("Document"); - - // generate uid - int64_t uid = generate_uid(); - doc.AddProperties(uid, "", "Scene"); - FBX::Node p("Properties70"); - p.AddP70("SourceObject", "object", "", ""); // what is this even for? - p.AddP70string("ActiveAnimStackName", ""); // should do this properly? - doc.AddChild(p); - - // UID for root node in scene hierarchy. - // always set to 0 in the case of a single document. - // not sure what happens if more than one document exists, - // but that won't matter to us as we're exporting a single scene. - doc.AddChild("RootNode", int64_t(0)); - - docs.AddChild(doc); - docs.Dump(outfile, binary, 0); -} - -void FBXExporter::WriteReferences () -{ - if (!binary) { - WriteAsciiSectionHeader("Document References"); - } - // always empty for now. - // not really sure what this is for. - FBX::Node n("References"); - n.force_has_children = true; - n.Dump(outfile, binary, 0); -} - - -// --------------------------------------------------------------- -// some internal helper functions used for writing the definitions -// (before any actual data is written) -// --------------------------------------------------------------- - -size_t count_nodes(const aiNode* n, const aiNode* root) { - size_t count; - if (n == root) { - count = n->mNumMeshes; // (not counting root node) - } else if (n->mNumMeshes > 1) { - count = n->mNumMeshes + 1; - } else { - count = 1; - } - for (size_t i = 0; i < n->mNumChildren; ++i) { - count += count_nodes(n->mChildren[i], root); - } - return count; -} - -bool has_phong_mat(const aiScene* scene) -{ - // just search for any material with a shininess exponent - for (size_t i = 0; i < scene->mNumMaterials; ++i) { - aiMaterial* mat = scene->mMaterials[i]; - float shininess = 0; - mat->Get(AI_MATKEY_SHININESS, shininess); - if (shininess > 0) { - return true; - } - } - return false; -} - -size_t count_images(const aiScene* scene) { - std::unordered_set<std::string> images; - aiString texpath; - for (size_t i = 0; i < scene->mNumMaterials; ++i) { - aiMaterial* mat = scene->mMaterials[i]; - for ( - size_t tt = aiTextureType_DIFFUSE; - tt < aiTextureType_UNKNOWN; - ++tt - ){ - const aiTextureType textype = static_cast<aiTextureType>(tt); - const size_t texcount = mat->GetTextureCount(textype); - for (unsigned int j = 0; j < texcount; ++j) { - mat->GetTexture(textype, j, &texpath); - images.insert(std::string(texpath.C_Str())); - } - } - } - return images.size(); -} - -size_t count_textures(const aiScene* scene) { - size_t count = 0; - for (size_t i = 0; i < scene->mNumMaterials; ++i) { - aiMaterial* mat = scene->mMaterials[i]; - for ( - size_t tt = aiTextureType_DIFFUSE; - tt < aiTextureType_UNKNOWN; - ++tt - ){ - // TODO: handle layered textures - if (mat->GetTextureCount(static_cast<aiTextureType>(tt)) > 0) { - count += 1; - } - } - } - return count; -} - -size_t count_deformers(const aiScene* scene) { - size_t count = 0; - for (size_t i = 0; i < scene->mNumMeshes; ++i) { - const size_t n = scene->mMeshes[i]->mNumBones; - if (n) { - // 1 main deformer, 1 subdeformer per bone - count += n + 1; - } - } - return count; -} - -void FBXExporter::WriteDefinitions () -{ - // basically this is just bookkeeping: - // determining how many of each type of object there are - // and specifying the base properties to use when otherwise unspecified. - - // ascii section header - if (!binary) { - WriteAsciiSectionHeader("Object definitions"); - } - - // we need to count the objects - int32_t count; - int32_t total_count = 0; - - // and store them - std::vector<FBX::Node> object_nodes; - FBX::Node n, pt, p; - - // GlobalSettings - // this seems to always be here in Maya exports - n = FBX::Node("ObjectType", "GlobalSettings"); - count = 1; - n.AddChild("Count", count); - object_nodes.push_back(n); - total_count += count; - - // AnimationStack / FbxAnimStack - // this seems to always be here in Maya exports, - // but no harm seems to come of leaving it out. - count = mScene->mNumAnimations; - if (count) { - n = FBX::Node("ObjectType", "AnimationStack"); - n.AddChild("Count", count); - pt = FBX::Node("PropertyTemplate", "FbxAnimStack"); - p = FBX::Node("Properties70"); - p.AddP70string("Description", ""); - p.AddP70time("LocalStart", 0); - p.AddP70time("LocalStop", 0); - p.AddP70time("ReferenceStart", 0); - p.AddP70time("ReferenceStop", 0); - pt.AddChild(p); - n.AddChild(pt); - object_nodes.push_back(n); - total_count += count; - } - - // AnimationLayer / FbxAnimLayer - // this seems to always be here in Maya exports, - // but no harm seems to come of leaving it out. - // Assimp doesn't support animation layers, - // so there will be one per aiAnimation - count = mScene->mNumAnimations; - if (count) { - n = FBX::Node("ObjectType", "AnimationLayer"); - n.AddChild("Count", count); - pt = FBX::Node("PropertyTemplate", "FBXAnimLayer"); - p = FBX::Node("Properties70"); - p.AddP70("Weight", "Number", "", "A", double(100)); - p.AddP70bool("Mute", 0); - p.AddP70bool("Solo", 0); - p.AddP70bool("Lock", 0); - p.AddP70color("Color", 0.8, 0.8, 0.8); - p.AddP70("BlendMode", "enum", "", "", int32_t(0)); - p.AddP70("RotationAccumulationMode", "enum", "", "", int32_t(0)); - p.AddP70("ScaleAccumulationMode", "enum", "", "", int32_t(0)); - p.AddP70("BlendModeBypass", "ULongLong", "", "", int64_t(0)); - pt.AddChild(p); - n.AddChild(pt); - object_nodes.push_back(n); - total_count += count; - } - - // NodeAttribute - // this is completely absurd. - // there can only be one "NodeAttribute" template, - // but FbxSkeleton, FbxCamera, FbxLight all are "NodeAttributes". - // so if only one exists we should set the template for that, - // otherwise... we just pick one :/. - // the others have to set all their properties every instance, - // because there's no template. - count = 1; // TODO: select properly - if (count) { - // FbxSkeleton - n = FBX::Node("ObjectType", "NodeAttribute"); - n.AddChild("Count", count); - pt = FBX::Node("PropertyTemplate", "FbxSkeleton"); - p = FBX::Node("Properties70"); - p.AddP70color("Color", 0.8, 0.8, 0.8); - p.AddP70double("Size", 33.333333333333); - p.AddP70("LimbLength", "double", "Number", "H", double(1)); - // note: not sure what the "H" flag is for - hidden? - pt.AddChild(p); - n.AddChild(pt); - object_nodes.push_back(n); - total_count += count; - } - - // Model / FbxNode - // <~~ node hierarchy - count = int32_t(count_nodes(mScene->mRootNode, mScene->mRootNode)); - if (count) { - n = FBX::Node("ObjectType", "Model"); - n.AddChild("Count", count); - pt = FBX::Node("PropertyTemplate", "FbxNode"); - p = FBX::Node("Properties70"); - p.AddP70enum("QuaternionInterpolate", 0); - p.AddP70vector("RotationOffset", 0.0, 0.0, 0.0); - p.AddP70vector("RotationPivot", 0.0, 0.0, 0.0); - p.AddP70vector("ScalingOffset", 0.0, 0.0, 0.0); - p.AddP70vector("ScalingPivot", 0.0, 0.0, 0.0); - p.AddP70bool("TranslationActive", 0); - p.AddP70vector("TranslationMin", 0.0, 0.0, 0.0); - p.AddP70vector("TranslationMax", 0.0, 0.0, 0.0); - p.AddP70bool("TranslationMinX", 0); - p.AddP70bool("TranslationMinY", 0); - p.AddP70bool("TranslationMinZ", 0); - p.AddP70bool("TranslationMaxX", 0); - p.AddP70bool("TranslationMaxY", 0); - p.AddP70bool("TranslationMaxZ", 0); - p.AddP70enum("RotationOrder", 0); - p.AddP70bool("RotationSpaceForLimitOnly", 0); - p.AddP70double("RotationStiffnessX", 0.0); - p.AddP70double("RotationStiffnessY", 0.0); - p.AddP70double("RotationStiffnessZ", 0.0); - p.AddP70double("AxisLen", 10.0); - p.AddP70vector("PreRotation", 0.0, 0.0, 0.0); - p.AddP70vector("PostRotation", 0.0, 0.0, 0.0); - p.AddP70bool("RotationActive", 0); - p.AddP70vector("RotationMin", 0.0, 0.0, 0.0); - p.AddP70vector("RotationMax", 0.0, 0.0, 0.0); - p.AddP70bool("RotationMinX", 0); - p.AddP70bool("RotationMinY", 0); - p.AddP70bool("RotationMinZ", 0); - p.AddP70bool("RotationMaxX", 0); - p.AddP70bool("RotationMaxY", 0); - p.AddP70bool("RotationMaxZ", 0); - p.AddP70enum("InheritType", 0); - p.AddP70bool("ScalingActive", 0); - p.AddP70vector("ScalingMin", 0.0, 0.0, 0.0); - p.AddP70vector("ScalingMax", 1.0, 1.0, 1.0); - p.AddP70bool("ScalingMinX", 0); - p.AddP70bool("ScalingMinY", 0); - p.AddP70bool("ScalingMinZ", 0); - p.AddP70bool("ScalingMaxX", 0); - p.AddP70bool("ScalingMaxY", 0); - p.AddP70bool("ScalingMaxZ", 0); - p.AddP70vector("GeometricTranslation", 0.0, 0.0, 0.0); - p.AddP70vector("GeometricRotation", 0.0, 0.0, 0.0); - p.AddP70vector("GeometricScaling", 1.0, 1.0, 1.0); - p.AddP70double("MinDampRangeX", 0.0); - p.AddP70double("MinDampRangeY", 0.0); - p.AddP70double("MinDampRangeZ", 0.0); - p.AddP70double("MaxDampRangeX", 0.0); - p.AddP70double("MaxDampRangeY", 0.0); - p.AddP70double("MaxDampRangeZ", 0.0); - p.AddP70double("MinDampStrengthX", 0.0); - p.AddP70double("MinDampStrengthY", 0.0); - p.AddP70double("MinDampStrengthZ", 0.0); - p.AddP70double("MaxDampStrengthX", 0.0); - p.AddP70double("MaxDampStrengthY", 0.0); - p.AddP70double("MaxDampStrengthZ", 0.0); - p.AddP70double("PreferedAngleX", 0.0); - p.AddP70double("PreferedAngleY", 0.0); - p.AddP70double("PreferedAngleZ", 0.0); - p.AddP70("LookAtProperty", "object", "", ""); - p.AddP70("UpVectorProperty", "object", "", ""); - p.AddP70bool("Show", 1); - p.AddP70bool("NegativePercentShapeSupport", 1); - p.AddP70int("DefaultAttributeIndex", -1); - p.AddP70bool("Freeze", 0); - p.AddP70bool("LODBox", 0); - p.AddP70( - "Lcl Translation", "Lcl Translation", "", "A", - double(0), double(0), double(0) - ); - p.AddP70( - "Lcl Rotation", "Lcl Rotation", "", "A", - double(0), double(0), double(0) - ); - p.AddP70( - "Lcl Scaling", "Lcl Scaling", "", "A", - double(1), double(1), double(1) - ); - p.AddP70("Visibility", "Visibility", "", "A", double(1)); - p.AddP70( - "Visibility Inheritance", "Visibility Inheritance", "", "", - int32_t(1) - ); - pt.AddChild(p); - n.AddChild(pt); - object_nodes.push_back(n); - total_count += count; - } - - // Geometry / FbxMesh - // <~~ aiMesh - count = mScene->mNumMeshes; - - // Blendshapes are considered Geometry - int32_t bsDeformerCount=0; - for (size_t mi = 0; mi < mScene->mNumMeshes; ++mi) { - aiMesh* m = mScene->mMeshes[mi]; - if (m->mNumAnimMeshes > 0) { - count+=m->mNumAnimMeshes; - bsDeformerCount+=m->mNumAnimMeshes; // One deformer per blendshape - bsDeformerCount++; // Plus one master blendshape deformer - } - } - - if (count) { - n = FBX::Node("ObjectType", "Geometry"); - n.AddChild("Count", count); - pt = FBX::Node("PropertyTemplate", "FbxMesh"); - p = FBX::Node("Properties70"); - p.AddP70color("Color", 0, 0, 0); - p.AddP70vector("BBoxMin", 0, 0, 0); - p.AddP70vector("BBoxMax", 0, 0, 0); - p.AddP70bool("Primary Visibility", 1); - p.AddP70bool("Casts Shadows", 1); - p.AddP70bool("Receive Shadows", 1); - pt.AddChild(p); - n.AddChild(pt); - object_nodes.push_back(n); - total_count += count; - } - - // Material / FbxSurfacePhong, FbxSurfaceLambert, FbxSurfaceMaterial - // <~~ aiMaterial - // basically if there's any phong material this is defined as phong, - // and otherwise lambert. - // More complex materials cause a bare-bones FbxSurfaceMaterial definition - // and are treated specially, as they're not really supported by FBX. - // TODO: support Maya's Stingray PBS material - count = mScene->mNumMaterials; - if (count) { - bool has_phong = has_phong_mat(mScene); - n = FBX::Node("ObjectType", "Material"); - n.AddChild("Count", count); - pt = FBX::Node("PropertyTemplate"); - if (has_phong) { - pt.AddProperty("FbxSurfacePhong"); - } else { - pt.AddProperty("FbxSurfaceLambert"); - } - p = FBX::Node("Properties70"); - if (has_phong) { - p.AddP70string("ShadingModel", "Phong"); - } else { - p.AddP70string("ShadingModel", "Lambert"); - } - p.AddP70bool("MultiLayer", 0); - p.AddP70colorA("EmissiveColor", 0.0, 0.0, 0.0); - p.AddP70numberA("EmissiveFactor", 1.0); - p.AddP70colorA("AmbientColor", 0.2, 0.2, 0.2); - p.AddP70numberA("AmbientFactor", 1.0); - p.AddP70colorA("DiffuseColor", 0.8, 0.8, 0.8); - p.AddP70numberA("DiffuseFactor", 1.0); - p.AddP70vector("Bump", 0.0, 0.0, 0.0); - p.AddP70vector("NormalMap", 0.0, 0.0, 0.0); - p.AddP70double("BumpFactor", 1.0); - p.AddP70colorA("TransparentColor", 0.0, 0.0, 0.0); - p.AddP70numberA("TransparencyFactor", 0.0); - p.AddP70color("DisplacementColor", 0.0, 0.0, 0.0); - p.AddP70double("DisplacementFactor", 1.0); - p.AddP70color("VectorDisplacementColor", 0.0, 0.0, 0.0); - p.AddP70double("VectorDisplacementFactor", 1.0); - if (has_phong) { - p.AddP70colorA("SpecularColor", 0.2, 0.2, 0.2); - p.AddP70numberA("SpecularFactor", 1.0); - p.AddP70numberA("ShininessExponent", 20.0); - p.AddP70colorA("ReflectionColor", 0.0, 0.0, 0.0); - p.AddP70numberA("ReflectionFactor", 1.0); - } - pt.AddChild(p); - n.AddChild(pt); - object_nodes.push_back(n); - total_count += count; - } - - // Video / FbxVideo - // one for each image file. - count = int32_t(count_images(mScene)); - if (count) { - n = FBX::Node("ObjectType", "Video"); - n.AddChild("Count", count); - pt = FBX::Node("PropertyTemplate", "FbxVideo"); - p = FBX::Node("Properties70"); - p.AddP70bool("ImageSequence", 0); - p.AddP70int("ImageSequenceOffset", 0); - p.AddP70double("FrameRate", 0.0); - p.AddP70int("LastFrame", 0); - p.AddP70int("Width", 0); - p.AddP70int("Height", 0); - p.AddP70("Path", "KString", "XRefUrl", "", ""); - p.AddP70int("StartFrame", 0); - p.AddP70int("StopFrame", 0); - p.AddP70double("PlaySpeed", 0.0); - p.AddP70time("Offset", 0); - p.AddP70enum("InterlaceMode", 0); - p.AddP70bool("FreeRunning", 0); - p.AddP70bool("Loop", 0); - p.AddP70enum("AccessMode", 0); - pt.AddChild(p); - n.AddChild(pt); - object_nodes.push_back(n); - total_count += count; - } - - // Texture / FbxFileTexture - // <~~ aiTexture - count = int32_t(count_textures(mScene)); - if (count) { - n = FBX::Node("ObjectType", "Texture"); - n.AddChild("Count", count); - pt = FBX::Node("PropertyTemplate", "FbxFileTexture"); - p = FBX::Node("Properties70"); - p.AddP70enum("TextureTypeUse", 0); - p.AddP70numberA("Texture alpha", 1.0); - p.AddP70enum("CurrentMappingType", 0); - p.AddP70enum("WrapModeU", 0); - p.AddP70enum("WrapModeV", 0); - p.AddP70bool("UVSwap", 0); - p.AddP70bool("PremultiplyAlpha", 1); - p.AddP70vectorA("Translation", 0.0, 0.0, 0.0); - p.AddP70vectorA("Rotation", 0.0, 0.0, 0.0); - p.AddP70vectorA("Scaling", 1.0, 1.0, 1.0); - p.AddP70vector("TextureRotationPivot", 0.0, 0.0, 0.0); - p.AddP70vector("TextureScalingPivot", 0.0, 0.0, 0.0); - p.AddP70enum("CurrentTextureBlendMode", 1); - p.AddP70string("UVSet", "default"); - p.AddP70bool("UseMaterial", 0); - p.AddP70bool("UseMipMap", 0); - pt.AddChild(p); - n.AddChild(pt); - object_nodes.push_back(n); - total_count += count; - } - - // AnimationCurveNode / FbxAnimCurveNode - count = mScene->mNumAnimations * 3; - if (count) { - n = FBX::Node("ObjectType", "AnimationCurveNode"); - n.AddChild("Count", count); - pt = FBX::Node("PropertyTemplate", "FbxAnimCurveNode"); - p = FBX::Node("Properties70"); - p.AddP70("d", "Compound", "", ""); - pt.AddChild(p); - n.AddChild(pt); - object_nodes.push_back(n); - total_count += count; - } - - // AnimationCurve / FbxAnimCurve - count = mScene->mNumAnimations * 9; - if (count) { - n = FBX::Node("ObjectType", "AnimationCurve"); - n.AddChild("Count", count); - object_nodes.push_back(n); - total_count += count; - } - - // Pose - count = 0; - for (size_t i = 0; i < mScene->mNumMeshes; ++i) { - aiMesh* mesh = mScene->mMeshes[i]; - if (mesh->HasBones()) { ++count; } - } - if (count) { - n = FBX::Node("ObjectType", "Pose"); - n.AddChild("Count", count); - object_nodes.push_back(n); - total_count += count; - } - - // Deformer - count = int32_t(count_deformers(mScene))+bsDeformerCount; - if (count) { - n = FBX::Node("ObjectType", "Deformer"); - n.AddChild("Count", count); - object_nodes.push_back(n); - total_count += count; - } - - // (template) - count = 0; - if (count) { - n = FBX::Node("ObjectType", ""); - n.AddChild("Count", count); - pt = FBX::Node("PropertyTemplate", ""); - p = FBX::Node("Properties70"); - pt.AddChild(p); - n.AddChild(pt); - object_nodes.push_back(n); - total_count += count; - } - - // now write it all - FBX::Node defs("Definitions"); - defs.AddChild("Version", int32_t(100)); - defs.AddChild("Count", int32_t(total_count)); - for (auto &on : object_nodes) { - defs.AddChild(on); - } - defs.Dump(outfile, binary, 0); -} - - -// ------------------------------------------------------------------- -// some internal helper functions used for writing the objects section -// (which holds the actual data) -// ------------------------------------------------------------------- - -aiNode* get_node_for_mesh(unsigned int meshIndex, aiNode* node) -{ - for (size_t i = 0; i < node->mNumMeshes; ++i) { - if (node->mMeshes[i] == meshIndex) { - return node; - } - } - for (size_t i = 0; i < node->mNumChildren; ++i) { - aiNode* ret = get_node_for_mesh(meshIndex, node->mChildren[i]); - if (ret) { return ret; } - } - return nullptr; -} - -aiMatrix4x4 get_world_transform(const aiNode* node, const aiScene* scene) -{ - std::vector<const aiNode*> node_chain; - while (node != scene->mRootNode) { - node_chain.push_back(node); - node = node->mParent; - } - aiMatrix4x4 transform; - for (auto n = node_chain.rbegin(); n != node_chain.rend(); ++n) { - transform *= (*n)->mTransformation; - } - return transform; -} - -int64_t to_ktime(double ticks, const aiAnimation* anim) { - if (anim->mTicksPerSecond <= 0) { - return static_cast<int64_t>(ticks) * FBX::SECOND; - } - return (static_cast<int64_t>(ticks) / static_cast<int64_t>(anim->mTicksPerSecond)) * FBX::SECOND; -} - -int64_t to_ktime(double time) { - return (static_cast<int64_t>(time * FBX::SECOND)); -} - -void FBXExporter::WriteObjects () -{ - if (!binary) { - WriteAsciiSectionHeader("Object properties"); - } - // numbers should match those given in definitions! make sure to check - StreamWriterLE outstream(outfile); - FBX::Node object_node("Objects"); - int indent = 0; - object_node.Begin(outstream, binary, indent); - object_node.EndProperties(outstream, binary, indent); - object_node.BeginChildren(outstream, binary, indent); - - bool bJoinIdenticalVertices = mProperties->GetPropertyBool("bJoinIdenticalVertices", true); - std::vector<std::vector<int32_t>> vVertexIndice;//save vertex_indices as it is needed later - - // geometry (aiMesh) - mesh_uids.clear(); - indent = 1; - for (size_t mi = 0; mi < mScene->mNumMeshes; ++mi) { - // it's all about this mesh - aiMesh* m = mScene->mMeshes[mi]; - - // start the node record - FBX::Node n("Geometry"); - int64_t uid = generate_uid(); - mesh_uids.push_back(uid); - n.AddProperty(uid); - n.AddProperty(FBX::SEPARATOR + "Geometry"); - n.AddProperty("Mesh"); - n.Begin(outstream, binary, indent); - n.DumpProperties(outstream, binary, indent); - n.EndProperties(outstream, binary, indent); - n.BeginChildren(outstream, binary, indent); - indent = 2; - - // output vertex data - each vertex should be unique (probably) - std::vector<double> flattened_vertices; - // index of original vertex in vertex data vector - std::vector<int32_t> vertex_indices; - // map of vertex value to its index in the data vector - std::map<aiVector3D,size_t> index_by_vertex_value; - if(bJoinIdenticalVertices){ - int32_t index = 0; - for (size_t vi = 0; vi < m->mNumVertices; ++vi) { - aiVector3D vtx = m->mVertices[vi]; - auto elem = index_by_vertex_value.find(vtx); - if (elem == index_by_vertex_value.end()) { - vertex_indices.push_back(index); - index_by_vertex_value[vtx] = index; - flattened_vertices.push_back(vtx[0]); - flattened_vertices.push_back(vtx[1]); - flattened_vertices.push_back(vtx[2]); - ++index; - } else { - vertex_indices.push_back(int32_t(elem->second)); - } - } - } - else { // do not join vertex, respect the export flag - vertex_indices.resize(m->mNumVertices); - std::iota(vertex_indices.begin(), vertex_indices.end(), 0); - for(unsigned int v = 0; v < m->mNumVertices; ++ v) { - aiVector3D vtx = m->mVertices[v]; - flattened_vertices.push_back(vtx.x); - flattened_vertices.push_back(vtx.y); - flattened_vertices.push_back(vtx.z); - } - } - vVertexIndice.push_back(vertex_indices); - - FBX::Node::WritePropertyNode( - "Vertices", flattened_vertices, outstream, binary, indent - ); - - // output polygon data as a flattened array of vertex indices. - // the last vertex index of each polygon is negated and - 1 - std::vector<int32_t> polygon_data; - for (size_t fi = 0; fi < m->mNumFaces; ++fi) { - const aiFace &f = m->mFaces[fi]; - for (size_t pvi = 0; pvi < f.mNumIndices - 1; ++pvi) { - polygon_data.push_back(vertex_indices[f.mIndices[pvi]]); - } - polygon_data.push_back( - -1 - vertex_indices[f.mIndices[f.mNumIndices-1]] - ); - } - FBX::Node::WritePropertyNode( - "PolygonVertexIndex", polygon_data, outstream, binary, indent - ); - - // here could be edges but they're insane. - // it's optional anyway, so let's ignore it. - - FBX::Node::WritePropertyNode( - "GeometryVersion", int32_t(124), outstream, binary, indent - ); - - // normals, if any - if (m->HasNormals()) { - FBX::Node normals("LayerElementNormal", int32_t(0)); - normals.Begin(outstream, binary, indent); - normals.DumpProperties(outstream, binary, indent); - normals.EndProperties(outstream, binary, indent); - normals.BeginChildren(outstream, binary, indent); - indent = 3; - FBX::Node::WritePropertyNode( - "Version", int32_t(101), outstream, binary, indent - ); - FBX::Node::WritePropertyNode( - "Name", "", outstream, binary, indent - ); - FBX::Node::WritePropertyNode( - "MappingInformationType", "ByPolygonVertex", - outstream, binary, indent - ); - // TODO: vertex-normals or indexed normals when appropriate - FBX::Node::WritePropertyNode( - "ReferenceInformationType", "Direct", - outstream, binary, indent - ); - std::vector<double> normal_data; - normal_data.reserve(3 * polygon_data.size()); - for (size_t fi = 0; fi < m->mNumFaces; ++fi) { - const aiFace &f = m->mFaces[fi]; - for (size_t pvi = 0; pvi < f.mNumIndices; ++pvi) { - const aiVector3D &curN = m->mNormals[f.mIndices[pvi]]; - normal_data.push_back(curN.x); - normal_data.push_back(curN.y); - normal_data.push_back(curN.z); - } - } - FBX::Node::WritePropertyNode( - "Normals", normal_data, outstream, binary, indent - ); - // note: version 102 has a NormalsW also... not sure what it is, - // so we can stick with version 101 for now. - indent = 2; - normals.End(outstream, binary, indent, true); - } - - // colors, if any - // TODO only one color channel currently - const int32_t colorChannelIndex = 0; - if (m->HasVertexColors(colorChannelIndex)) { - FBX::Node vertexcolors("LayerElementColor", int32_t(colorChannelIndex)); - vertexcolors.Begin(outstream, binary, indent); - vertexcolors.DumpProperties(outstream, binary, indent); - vertexcolors.EndProperties(outstream, binary, indent); - vertexcolors.BeginChildren(outstream, binary, indent); - indent = 3; - FBX::Node::WritePropertyNode( - "Version", int32_t(101), outstream, binary, indent - ); - char layerName[8]; - sprintf(layerName, "COLOR_%d", colorChannelIndex); - FBX::Node::WritePropertyNode( - "Name", (const char*)layerName, outstream, binary, indent - ); - FBX::Node::WritePropertyNode( - "MappingInformationType", "ByPolygonVertex", - outstream, binary, indent - ); - FBX::Node::WritePropertyNode( - "ReferenceInformationType", "Direct", - outstream, binary, indent - ); - std::vector<double> color_data; - color_data.reserve(4 * polygon_data.size()); - for (size_t fi = 0; fi < m->mNumFaces; ++fi) { - const aiFace &f = m->mFaces[fi]; - for (size_t pvi = 0; pvi < f.mNumIndices; ++pvi) { - const aiColor4D &c = m->mColors[colorChannelIndex][f.mIndices[pvi]]; - color_data.push_back(c.r); - color_data.push_back(c.g); - color_data.push_back(c.b); - color_data.push_back(c.a); - } - } - FBX::Node::WritePropertyNode( - "Colors", color_data, outstream, binary, indent - ); - indent = 2; - vertexcolors.End(outstream, binary, indent, true); - } - - // uvs, if any - for (size_t uvi = 0; uvi < m->GetNumUVChannels(); ++uvi) { - if (m->mNumUVComponents[uvi] > 2) { - // FBX only supports 2-channel UV maps... - // or at least i'm not sure how to indicate a different number - std::stringstream err; - err << "Only 2-channel UV maps supported by FBX,"; - err << " but mesh " << mi; - if (m->mName.length) { - err << " (" << m->mName.C_Str() << ")"; - } - err << " UV map " << uvi; - err << " has " << m->mNumUVComponents[uvi]; - err << " components! Data will be preserved,"; - err << " but may be incorrectly interpreted on load."; - ASSIMP_LOG_WARN(err.str()); - } - FBX::Node uv("LayerElementUV", int32_t(uvi)); - uv.Begin(outstream, binary, indent); - uv.DumpProperties(outstream, binary, indent); - uv.EndProperties(outstream, binary, indent); - uv.BeginChildren(outstream, binary, indent); - indent = 3; - FBX::Node::WritePropertyNode( - "Version", int32_t(101), outstream, binary, indent - ); - // it doesn't seem like assimp keeps the uv map name, - // so just leave it blank. - FBX::Node::WritePropertyNode( - "Name", "", outstream, binary, indent - ); - FBX::Node::WritePropertyNode( - "MappingInformationType", "ByPolygonVertex", - outstream, binary, indent - ); - FBX::Node::WritePropertyNode( - "ReferenceInformationType", "IndexToDirect", - outstream, binary, indent - ); - - std::vector<double> uv_data; - std::vector<int32_t> uv_indices; - std::map<aiVector3D,int32_t> index_by_uv; - int32_t index = 0; - for (size_t fi = 0; fi < m->mNumFaces; ++fi) { - const aiFace &f = m->mFaces[fi]; - for (size_t pvi = 0; pvi < f.mNumIndices; ++pvi) { - const aiVector3D &curUv = - m->mTextureCoords[uvi][f.mIndices[pvi]]; - auto elem = index_by_uv.find(curUv); - if (elem == index_by_uv.end()) { - index_by_uv[curUv] = index; - uv_indices.push_back(index); - for (unsigned int x = 0; x < m->mNumUVComponents[uvi]; ++x) { - uv_data.push_back(curUv[x]); - } - ++index; - } else { - uv_indices.push_back(elem->second); - } - } - } - FBX::Node::WritePropertyNode( - "UV", uv_data, outstream, binary, indent - ); - FBX::Node::WritePropertyNode( - "UVIndex", uv_indices, outstream, binary, indent - ); - indent = 2; - uv.End(outstream, binary, indent, true); - } - - // i'm not really sure why this material section exists, - // as the material is linked via "Connections". - // it seems to always have the same "0" value. - FBX::Node mat("LayerElementMaterial", int32_t(0)); - mat.AddChild("Version", int32_t(101)); - mat.AddChild("Name", ""); - mat.AddChild("MappingInformationType", "AllSame"); - mat.AddChild("ReferenceInformationType", "IndexToDirect"); - std::vector<int32_t> mat_indices = {0}; - mat.AddChild("Materials", mat_indices); - mat.Dump(outstream, binary, indent); - - // finally we have the layer specifications, - // which select the normals / UV set / etc to use. - // TODO: handle multiple uv sets correctly? - FBX::Node layer("Layer", int32_t(0)); - layer.AddChild("Version", int32_t(100)); - FBX::Node le("LayerElement"); - le.AddChild("Type", "LayerElementNormal"); - le.AddChild("TypedIndex", int32_t(0)); - layer.AddChild(le); - // TODO only 1 color channel currently - le = FBX::Node("LayerElement"); - le.AddChild("Type", "LayerElementColor"); - le.AddChild("TypedIndex", int32_t(0)); - layer.AddChild(le); - le = FBX::Node("LayerElement"); - le.AddChild("Type", "LayerElementMaterial"); - le.AddChild("TypedIndex", int32_t(0)); - layer.AddChild(le); - le = FBX::Node("LayerElement"); - le.AddChild("Type", "LayerElementUV"); - le.AddChild("TypedIndex", int32_t(0)); - layer.AddChild(le); - layer.Dump(outstream, binary, indent); - - for(unsigned int lr = 1; lr < m->GetNumUVChannels(); ++ lr) - { - FBX::Node layerExtra("Layer", int32_t(lr)); - layerExtra.AddChild("Version", int32_t(100)); - FBX::Node leExtra("LayerElement"); - leExtra.AddChild("Type", "LayerElementUV"); - leExtra.AddChild("TypedIndex", int32_t(lr)); - layerExtra.AddChild(leExtra); - layerExtra.Dump(outstream, binary, indent); - } - // finish the node record - indent = 1; - n.End(outstream, binary, indent, true); - } - - - // aiMaterial - material_uids.clear(); - for (size_t i = 0; i < mScene->mNumMaterials; ++i) { - // it's all about this material - aiMaterial* m = mScene->mMaterials[i]; - - // these are used to receive material data - float f; aiColor3D c; - - // start the node record - FBX::Node n("Material"); - - int64_t uid = generate_uid(); - material_uids.push_back(uid); - n.AddProperty(uid); - - aiString name; - m->Get(AI_MATKEY_NAME, name); - n.AddProperty(name.C_Str() + FBX::SEPARATOR + "Material"); - - n.AddProperty(""); - - n.AddChild("Version", int32_t(102)); - f = 0; - m->Get(AI_MATKEY_SHININESS, f); - bool phong = (f > 0); - if (phong) { - n.AddChild("ShadingModel", "phong"); - } else { - n.AddChild("ShadingModel", "lambert"); - } - n.AddChild("MultiLayer", int32_t(0)); - - FBX::Node p("Properties70"); - - // materials exported using the FBX SDK have two sets of fields. - // there are the properties specified in the PropertyTemplate, - // which are those supported by the modernFBX SDK, - // and an extra set of properties with simpler names. - // The extra properties are a legacy material system from pre-2009. - // - // In the modern system, each property has "color" and "factor". - // Generally the interpretation of these seems to be - // that the colour is multiplied by the factor before use, - // but this is not always clear-cut. - // - // Usually assimp only stores the colour, - // so we can just leave the factors at the default "1.0". - - // first we can export the "standard" properties - if (m->Get(AI_MATKEY_COLOR_AMBIENT, c) == aiReturn_SUCCESS) { - p.AddP70colorA("AmbientColor", c.r, c.g, c.b); - //p.AddP70numberA("AmbientFactor", 1.0); - } - if (m->Get(AI_MATKEY_COLOR_DIFFUSE, c) == aiReturn_SUCCESS) { - p.AddP70colorA("DiffuseColor", c.r, c.g, c.b); - //p.AddP70numberA("DiffuseFactor", 1.0); - } - if (m->Get(AI_MATKEY_COLOR_TRANSPARENT, c) == aiReturn_SUCCESS) { - // "TransparentColor" / "TransparencyFactor"... - // thanks FBX, for your insightful interpretation of consistency - p.AddP70colorA("TransparentColor", c.r, c.g, c.b); - // TransparencyFactor defaults to 0.0, so set it to 1.0. - // note: Maya always sets this to 1.0, - // so we can't use it sensibly as "Opacity". - // In stead we rely on the legacy "Opacity" value, below. - // Blender also relies on "Opacity" not "TransparencyFactor", - // probably for a similar reason. - p.AddP70numberA("TransparencyFactor", 1.0); - } - if (m->Get(AI_MATKEY_COLOR_REFLECTIVE, c) == aiReturn_SUCCESS) { - p.AddP70colorA("ReflectionColor", c.r, c.g, c.b); - } - if (m->Get(AI_MATKEY_REFLECTIVITY, f) == aiReturn_SUCCESS) { - p.AddP70numberA("ReflectionFactor", f); - } - if (phong) { - if (m->Get(AI_MATKEY_COLOR_SPECULAR, c) == aiReturn_SUCCESS) { - p.AddP70colorA("SpecularColor", c.r, c.g, c.b); - } - if (m->Get(AI_MATKEY_SHININESS_STRENGTH, f) == aiReturn_SUCCESS) { - p.AddP70numberA("ShininessFactor", f); - } - if (m->Get(AI_MATKEY_SHININESS, f) == aiReturn_SUCCESS) { - p.AddP70numberA("ShininessExponent", f); - } - if (m->Get(AI_MATKEY_REFLECTIVITY, f) == aiReturn_SUCCESS) { - p.AddP70numberA("ReflectionFactor", f); - } - } - - // Now the legacy system. - // For safety let's include it. - // thrse values don't exist in the property template, - // and usually are completely ignored when loading. - // One notable exception is the "Opacity" property, - // which Blender uses as (1.0 - alpha). - c.r = 0.0f; c.g = 0.0f; c.b = 0.0f; - m->Get(AI_MATKEY_COLOR_EMISSIVE, c); - p.AddP70vector("Emissive", c.r, c.g, c.b); - c.r = 0.2f; c.g = 0.2f; c.b = 0.2f; - m->Get(AI_MATKEY_COLOR_AMBIENT, c); - p.AddP70vector("Ambient", c.r, c.g, c.b); - c.r = 0.8f; c.g = 0.8f; c.b = 0.8f; - m->Get(AI_MATKEY_COLOR_DIFFUSE, c); - p.AddP70vector("Diffuse", c.r, c.g, c.b); - // The FBX SDK determines "Opacity" from transparency colour (RGB) - // and factor (F) as: O = (1.0 - F * ((R + G + B) / 3)). - // However we actually have an opacity value, - // so we should take it from AI_MATKEY_OPACITY if possible. - // It might make more sense to use TransparencyFactor, - // but Blender actually loads "Opacity" correctly, so let's use it. - f = 1.0f; - if (m->Get(AI_MATKEY_COLOR_TRANSPARENT, c) == aiReturn_SUCCESS) { - f = 1.0f - ((c.r + c.g + c.b) / 3.0f); - } - m->Get(AI_MATKEY_OPACITY, f); - p.AddP70double("Opacity", f); - if (phong) { - // specular color is multiplied by shininess_strength - c.r = 0.2f; c.g = 0.2f; c.b = 0.2f; - m->Get(AI_MATKEY_COLOR_SPECULAR, c); - f = 1.0f; - m->Get(AI_MATKEY_SHININESS_STRENGTH, f); - p.AddP70vector("Specular", f*c.r, f*c.g, f*c.b); - f = 20.0f; - m->Get(AI_MATKEY_SHININESS, f); - p.AddP70double("Shininess", f); - // Legacy "Reflectivity" is F*F*((R+G+B)/3), - // where F is the proportion of light reflected (AKA reflectivity), - // and RGB is the reflective colour of the material. - // No idea why, but we might as well set it the same way. - f = 0.0f; - m->Get(AI_MATKEY_REFLECTIVITY, f); - c.r = 1.0f, c.g = 1.0f, c.b = 1.0f; - m->Get(AI_MATKEY_COLOR_REFLECTIVE, c); - p.AddP70double("Reflectivity", f*f*((c.r+c.g+c.b)/3.0)); - } - - n.AddChild(p); - - n.Dump(outstream, binary, indent); - } - - // we need to look up all the images we're using, - // so we can generate uids, and eliminate duplicates. - std::map<std::string, int64_t> uid_by_image; - for (size_t i = 0; i < mScene->mNumMaterials; ++i) { - aiString texpath; - aiMaterial* mat = mScene->mMaterials[i]; - for ( - size_t tt = aiTextureType_DIFFUSE; - tt < aiTextureType_UNKNOWN; - ++tt - ){ - const aiTextureType textype = static_cast<aiTextureType>(tt); - const size_t texcount = mat->GetTextureCount(textype); - for (size_t j = 0; j < texcount; ++j) { - mat->GetTexture(textype, (unsigned int)j, &texpath); - const std::string texstring = texpath.C_Str(); - auto elem = uid_by_image.find(texstring); - if (elem == uid_by_image.end()) { - uid_by_image[texstring] = generate_uid(); - } - } - } - } - - // FbxVideo - stores images used by textures. - for (const auto &it : uid_by_image) { - FBX::Node n("Video"); - const int64_t& uid = it.second; - const std::string name = ""; // TODO: ... name??? - n.AddProperties(uid, name + FBX::SEPARATOR + "Video", "Clip"); - n.AddChild("Type", "Clip"); - FBX::Node p("Properties70"); - // TODO: get full path... relative path... etc... ugh... - // for now just use the same path for everything, - // and hopefully one of them will work out. - std::string path = it.first; - // try get embedded texture - const aiTexture* embedded_texture = mScene->GetEmbeddedTexture(it.first.c_str()); - if (embedded_texture != nullptr) { - // change the path (use original filename, if available. If name is empty, concatenate texture index with file extension) - std::stringstream newPath; - if (embedded_texture->mFilename.length > 0) { - newPath << embedded_texture->mFilename.C_Str(); - } else if (embedded_texture->achFormatHint[0]) { - int texture_index = std::stoi(path.substr(1, path.size() - 1)); - newPath << texture_index << "." << embedded_texture->achFormatHint; - } - path = newPath.str(); - // embed the texture - size_t texture_size = static_cast<size_t>(embedded_texture->mWidth * std::max(embedded_texture->mHeight, 1u)); - if (binary) { - // embed texture as binary data - std::vector<uint8_t> tex_data; - tex_data.resize(texture_size); - memcpy(&tex_data[0], (char*)embedded_texture->pcData, texture_size); - n.AddChild("Content", tex_data); - } else { - // embed texture in base64 encoding - std::string encoded_texture = FBX::Util::EncodeBase64((char*)embedded_texture->pcData, texture_size); - n.AddChild("Content", encoded_texture); - } - } - p.AddP70("Path", "KString", "XRefUrl", "", path); - n.AddChild(p); - n.AddChild("UseMipMap", int32_t(0)); - n.AddChild("Filename", path); - n.AddChild("RelativeFilename", path); - n.Dump(outstream, binary, indent); - } - - // Textures - // referenced by material_index/texture_type pairs. - std::map<std::pair<size_t,size_t>,int64_t> texture_uids; - const std::map<aiTextureType,std::string> prop_name_by_tt = { - {aiTextureType_DIFFUSE, "DiffuseColor"}, - {aiTextureType_SPECULAR, "SpecularColor"}, - {aiTextureType_AMBIENT, "AmbientColor"}, - {aiTextureType_EMISSIVE, "EmissiveColor"}, - {aiTextureType_HEIGHT, "Bump"}, - {aiTextureType_NORMALS, "NormalMap"}, - {aiTextureType_SHININESS, "ShininessExponent"}, - {aiTextureType_OPACITY, "TransparentColor"}, - {aiTextureType_DISPLACEMENT, "DisplacementColor"}, - //{aiTextureType_LIGHTMAP, "???"}, - {aiTextureType_REFLECTION, "ReflectionColor"} - //{aiTextureType_UNKNOWN, ""} - }; - for (size_t i = 0; i < mScene->mNumMaterials; ++i) { - // textures are attached to materials - aiMaterial* mat = mScene->mMaterials[i]; - int64_t material_uid = material_uids[i]; - - for ( - size_t j = aiTextureType_DIFFUSE; - j < aiTextureType_UNKNOWN; - ++j - ) { - const aiTextureType tt = static_cast<aiTextureType>(j); - size_t n = mat->GetTextureCount(tt); - - if (n < 1) { // no texture of this type - continue; - } - - if (n > 1) { - // TODO: multilayer textures - std::stringstream err; - err << "Multilayer textures not supported (for now),"; - err << " skipping texture type " << j; - err << " of material " << i; - ASSIMP_LOG_WARN(err.str()); - } - - // get image path for this (single-image) texture - aiString tpath; - if (mat->GetTexture(tt, 0, &tpath) != aiReturn_SUCCESS) { - std::stringstream err; - err << "Failed to get texture 0 for texture of type " << tt; - err << " on material " << i; - err << ", however GetTextureCount returned 1."; - throw DeadlyExportError(err.str()); - } - const std::string texture_path(tpath.C_Str()); - - // get connected image uid - auto elem = uid_by_image.find(texture_path); - if (elem == uid_by_image.end()) { - // this should never happen - std::stringstream err; - err << "Failed to find video element for texture with path"; - err << " \"" << texture_path << "\""; - err << ", type " << j << ", material " << i; - throw DeadlyExportError(err.str()); - } - const int64_t image_uid = elem->second; - - // get the name of the material property to connect to - auto elem2 = prop_name_by_tt.find(tt); - if (elem2 == prop_name_by_tt.end()) { - // don't know how to handle this type of texture, - // so skip it. - std::stringstream err; - err << "Not sure how to handle texture of type " << j; - err << " on material " << i; - err << ", skipping..."; - ASSIMP_LOG_WARN(err.str()); - continue; - } - const std::string& prop_name = elem2->second; - - // generate a uid for this texture - const int64_t texture_uid = generate_uid(); - - // link the texture to the material - connections.emplace_back( - "C", "OP", texture_uid, material_uid, prop_name - ); - - // link the image data to the texture - connections.emplace_back("C", "OO", image_uid, texture_uid); - - aiUVTransform trafo; - unsigned int max = sizeof(aiUVTransform); - aiGetMaterialFloatArray(mat, AI_MATKEY_UVTRANSFORM(aiTextureType_DIFFUSE, 0), (ai_real *)&trafo, &max); - - // now write the actual texture node - FBX::Node tnode("Texture"); - // TODO: some way to determine texture name? - const std::string texture_name = "" + FBX::SEPARATOR + "Texture"; - tnode.AddProperties(texture_uid, texture_name, ""); - // there really doesn't seem to be a better type than this: - tnode.AddChild("Type", "TextureVideoClip"); - tnode.AddChild("Version", int32_t(202)); - tnode.AddChild("TextureName", texture_name); - FBX::Node p("Properties70"); - p.AddP70vectorA("Translation", trafo.mTranslation[0], trafo.mTranslation[1], 0.0); - p.AddP70vectorA("Rotation", 0, 0, trafo.mRotation); - p.AddP70vectorA("Scaling", trafo.mScaling[0], trafo.mScaling[1], 0.0); - p.AddP70enum("CurrentTextureBlendMode", 0); // TODO: verify - //p.AddP70string("UVSet", ""); // TODO: how should this work? - p.AddP70bool("UseMaterial", 1); - tnode.AddChild(p); - // can't easily determine which texture path will be correct, - // so just store what we have in every field. - // these being incorrect is a common problem with FBX anyway. - tnode.AddChild("FileName", texture_path); - tnode.AddChild("RelativeFilename", texture_path); - tnode.AddChild("ModelUVTranslation", double(0.0), double(0.0)); - tnode.AddChild("ModelUVScaling", double(1.0), double(1.0)); - tnode.AddChild("Texture_Alpha_Source", "None"); - tnode.AddChild( - "Cropping", int32_t(0), int32_t(0), int32_t(0), int32_t(0) - ); - tnode.Dump(outstream, binary, indent); - } - } - - // Blendshapes, if any - for (size_t mi = 0; mi < mScene->mNumMeshes; ++mi) { - const aiMesh* m = mScene->mMeshes[mi]; - if (m->mNumAnimMeshes == 0) { - continue; - } - // make a deformer for this mesh - int64_t deformer_uid = generate_uid(); - FBX::Node dnode("Deformer"); - dnode.AddProperties(deformer_uid, m->mName.data + FBX::SEPARATOR + "Blendshapes", "BlendShape"); - dnode.AddChild("Version", int32_t(101)); - dnode.Dump(outstream, binary, indent); - // connect it - connections.emplace_back("C", "OO", deformer_uid, mesh_uids[mi]); - std::vector<int32_t> vertex_indices = vVertexIndice[mi]; - - for (unsigned int am = 0; am < m->mNumAnimMeshes; ++am) { - aiAnimMesh *pAnimMesh = m->mAnimMeshes[am]; - std::string blendshape_name = pAnimMesh->mName.data; - - // start the node record - FBX::Node bsnode("Geometry"); - int64_t blendshape_uid = generate_uid(); - mesh_uids.push_back(blendshape_uid); - bsnode.AddProperty(blendshape_uid); - bsnode.AddProperty(blendshape_name + FBX::SEPARATOR + "Blendshape"); - bsnode.AddProperty("Shape"); - bsnode.AddChild("Version", int32_t(100)); - bsnode.Begin(outstream, binary, indent); - bsnode.DumpProperties(outstream, binary, indent); - bsnode.EndProperties(outstream, binary, indent); - bsnode.BeginChildren(outstream, binary, indent); - indent++; - if (pAnimMesh->HasPositions()) { - std::vector<int32_t>shape_indices; - std::vector<double>pPositionDiff; - std::vector<double>pNormalDiff; - - for (unsigned int vt = 0; vt < vertex_indices.size(); ++vt) { - aiVector3D pDiff = (pAnimMesh->mVertices[vertex_indices[vt]] - m->mVertices[vertex_indices[vt]]); - if(pDiff.Length()>1e-8){ - shape_indices.push_back(vertex_indices[vt]); - pPositionDiff.push_back(pDiff[0]); - pPositionDiff.push_back(pDiff[1]); - pPositionDiff.push_back(pDiff[2]); - - if (pAnimMesh->HasNormals()) { - aiVector3D nDiff = (pAnimMesh->mNormals[vertex_indices[vt]] - m->mNormals[vertex_indices[vt]]); - pNormalDiff.push_back(nDiff[0]); - pNormalDiff.push_back(nDiff[1]); - pNormalDiff.push_back(nDiff[2]); - } - } - } - - FBX::Node::WritePropertyNode( - "Indexes", shape_indices, outstream, binary, indent - ); - - FBX::Node::WritePropertyNode( - "Vertices", pPositionDiff, outstream, binary, indent - ); - - if (pNormalDiff.size()>0) { - FBX::Node::WritePropertyNode( - "Normals", pNormalDiff, outstream, binary, indent - ); - } - } - indent--; - bsnode.End(outstream, binary, indent, true); - - // Add blendshape Channel Deformer - FBX::Node sdnode("Deformer"); - const int64_t blendchannel_uid = generate_uid(); - sdnode.AddProperties( - blendchannel_uid, blendshape_name + FBX::SEPARATOR + "SubDeformer", "BlendShapeChannel" - ); - sdnode.AddChild("Version", int32_t(100)); - sdnode.AddChild("DeformPercent", float(0.0)); - FBX::Node p("Properties70"); - p.AddP70numberA("DeformPercent", 0.0); - sdnode.AddChild(p); - // TODO: Normally just one weight per channel, adding stub for later development - std::vector<float>fFullWeights; - fFullWeights.push_back(100.); - sdnode.AddChild("FullWeights", fFullWeights); - sdnode.Dump(outstream, binary, indent); - - connections.emplace_back("C", "OO", blendchannel_uid, deformer_uid); - connections.emplace_back("C", "OO", blendshape_uid, blendchannel_uid); - } - } - - // bones. - // - // output structure: - // subset of node hierarchy that are "skeleton", - // i.e. do not have meshes but only bones. - // but.. i'm not sure how anyone could guarantee that... - // - // input... - // well, for each mesh it has "bones", - // and the bone names correspond to nodes. - // of course we also need the parent nodes, - // as they give some of the transform........ - // - // well. we can assume a sane input, i suppose. - // - // so input is the bone node hierarchy, - // with an extra thing for the transformation of the MESH in BONE space. - // - // output is a set of bone nodes, - // a "bindpose" which indicates the default local transform of all bones, - // and a set of "deformers". - // each deformer is parented to a mesh geometry, - // and has one or more "subdeformer"s as children. - // each subdeformer has one bone node as a child, - // and represents the influence of that bone on the grandparent mesh. - // the subdeformer has a list of indices, and weights, - // with indices specifying vertex indices, - // and weights specifying the corresponding influence of this bone. - // it also has Transform and TransformLink elements, - // specifying the transform of the MESH in BONE space, - // and the transformation of the BONE in WORLD space, - // likely in the bindpose. - // - // the input bone structure is different but similar, - // storing the number of weights for this bone, - // and an array of (vertex index, weight) pairs. - // - // one sticky point is that the number of vertices may not match, - // because assimp splits vertices by normal, uv, etc. - - // functor for aiNode sorting - struct SortNodeByName - { - bool operator()(const aiNode *lhs, const aiNode *rhs) const - { - return strcmp(lhs->mName.C_Str(), rhs->mName.C_Str()) < 0; - } - }; - - // first we should mark the skeleton for each mesh. - // the skeleton must include not only the aiBones, - // but also all their parent nodes. - // anything that affects the position of any bone node must be included. - // Use SorNodeByName to make sure the exported result will be the same across all systems - // Otherwise the aiNodes of the skeleton would be sorted based on the pointer address, which isn't consistent - std::vector<std::set<const aiNode*, SortNodeByName>> skeleton_by_mesh(mScene->mNumMeshes); - // at the same time we can build a list of all the skeleton nodes, - // which will be used later to mark them as type "limbNode". - std::unordered_set<const aiNode*> limbnodes; - - //actual bone nodes in fbx, without parenting-up - std::unordered_set<std::string> setAllBoneNamesInScene; - for(unsigned int m = 0; m < mScene->mNumMeshes; ++ m) - { - aiMesh* pMesh = mScene->mMeshes[m]; - for(unsigned int b = 0; b < pMesh->mNumBones; ++ b) - setAllBoneNamesInScene.insert(pMesh->mBones[b]->mName.data); - } - aiMatrix4x4 mxTransIdentity; - - // and a map of nodes by bone name, as finding them is annoying. - std::map<std::string,aiNode*> node_by_bone; - for (size_t mi = 0; mi < mScene->mNumMeshes; ++mi) { - const aiMesh* m = mScene->mMeshes[mi]; - std::set<const aiNode*, SortNodeByName> skeleton; - for (size_t bi =0; bi < m->mNumBones; ++bi) { - const aiBone* b = m->mBones[bi]; - const std::string name(b->mName.C_Str()); - auto elem = node_by_bone.find(name); - aiNode* n; - if (elem != node_by_bone.end()) { - n = elem->second; - } else { - n = mScene->mRootNode->FindNode(b->mName); - if (!n) { - // this should never happen - std::stringstream err; - err << "Failed to find node for bone: \"" << name << "\""; - throw DeadlyExportError(err.str()); - } - node_by_bone[name] = n; - limbnodes.insert(n); - } - skeleton.insert(n); - // mark all parent nodes as skeleton as well, - // up until we find the root node, - // or else the node containing the mesh, - // or else the parent of a node containing the mesh. - for ( - const aiNode* parent = n->mParent; - parent && parent != mScene->mRootNode; - parent = parent->mParent - ) { - // if we've already done this node we can skip it all - if (skeleton.count(parent)) { - break; - } - // ignore fbx transform nodes as these will be collapsed later - // TODO: cache this by aiNode* - const std::string node_name(parent->mName.C_Str()); - if (node_name.find(MAGIC_NODE_TAG) != std::string::npos) { - continue; - } - //not a bone in scene && no effect in transform - if(setAllBoneNamesInScene.find(node_name)==setAllBoneNamesInScene.end() - && parent->mTransformation == mxTransIdentity) { - continue; - } - // otherwise check if this is the root of the skeleton - bool end = false; - // is the mesh part of this node? - for (size_t i = 0; i < parent->mNumMeshes; ++i) { - if (parent->mMeshes[i] == mi) { - end = true; - break; - } - } - // is the mesh in one of the children of this node? - for (size_t j = 0; j < parent->mNumChildren; ++j) { - aiNode* child = parent->mChildren[j]; - for (size_t i = 0; i < child->mNumMeshes; ++i) { - if (child->mMeshes[i] == mi) { - end = true; - break; - } - } - if (end) { break; } - } - - // if it was the skeleton root we can finish here - if (end) { break; } - } - } - skeleton_by_mesh[mi] = skeleton; - } - - // we'll need the uids for the bone nodes, so generate them now - for (size_t i = 0; i < mScene->mNumMeshes; ++i) { - auto &s = skeleton_by_mesh[i]; - for (const aiNode* n : s) { - auto elem = node_uids.find(n); - if (elem == node_uids.end()) { - node_uids[n] = generate_uid(); - } - } - } - - // now, for each aiMesh, we need to export a deformer, - // and for each aiBone a subdeformer, - // which should have all the skinning info. - // these will need to be connected properly to the mesh, - // and we can do that all now. - for (size_t mi = 0; mi < mScene->mNumMeshes; ++mi) { - const aiMesh* m = mScene->mMeshes[mi]; - if (!m->HasBones()) { - continue; - } - // make a deformer for this mesh - int64_t deformer_uid = generate_uid(); - FBX::Node dnode("Deformer"); - dnode.AddProperties(deformer_uid, FBX::SEPARATOR + "Deformer", "Skin"); - dnode.AddChild("Version", int32_t(101)); - // "acuracy"... this is not a typo.... - dnode.AddChild("Link_DeformAcuracy", double(50)); - dnode.AddChild("SkinningType", "Linear"); // TODO: other modes? - dnode.Dump(outstream, binary, indent); - - // connect it - connections.emplace_back("C", "OO", deformer_uid, mesh_uids[mi]); - - //computed before - std::vector<int32_t>& vertex_indices = vVertexIndice[mi]; - - // TODO, FIXME: this won't work if anything is not in the bind pose. - // for now if such a situation is detected, we throw an exception. - std::set<const aiBone*> not_in_bind_pose; - std::set<const aiNode*> no_offset_matrix; - - // first get this mesh's position in world space, - // as we'll need it for each subdeformer. - // - // ...of course taking the position of the MESH doesn't make sense, - // as it can be instanced to many nodes. - // All we can do is assume no instancing, - // and take the first node we find that contains the mesh. - aiNode* mesh_node = get_node_for_mesh((unsigned int)mi, mScene->mRootNode); - aiMatrix4x4 mesh_xform = get_world_transform(mesh_node, mScene); - - // now make a subdeformer for each bone in the skeleton - const std::set<const aiNode*, SortNodeByName> skeleton= skeleton_by_mesh[mi]; - for (const aiNode* bone_node : skeleton) { - // if there's a bone for this node, find it - const aiBone* b = nullptr; - for (size_t bi = 0; bi < m->mNumBones; ++bi) { - // TODO: this probably should index by something else - const std::string name(m->mBones[bi]->mName.C_Str()); - if (node_by_bone[name] == bone_node) { - b = m->mBones[bi]; - break; - } - } - if (!b) { - no_offset_matrix.insert(bone_node); - } - - // start the subdeformer node - const int64_t subdeformer_uid = generate_uid(); - FBX::Node sdnode("Deformer"); - sdnode.AddProperties( - subdeformer_uid, FBX::SEPARATOR + "SubDeformer", "Cluster" - ); - sdnode.AddChild("Version", int32_t(100)); - sdnode.AddChild("UserData", "", ""); - - std::set<int32_t> setWeightedVertex; - // add indices and weights, if any - if (b) { - std::vector<int32_t> subdef_indices; - std::vector<double> subdef_weights; - int32_t last_index = -1; - for (size_t wi = 0; wi < b->mNumWeights; ++wi) { - int32_t vi = vertex_indices[b->mWeights[wi].mVertexId]; - bool bIsWeightedAlready = (setWeightedVertex.find(vi) != setWeightedVertex.end()); - if (vi == last_index || bIsWeightedAlready) { - // only for vertices we exported to fbx - // TODO, FIXME: this assumes identically-located vertices - // will always deform in the same way. - // as assimp doesn't store a separate list of "positions", - // there's not much that can be done about this - // other than assuming that identical position means - // identical vertex. - continue; - } - setWeightedVertex.insert(vi); - subdef_indices.push_back(vi); - subdef_weights.push_back(b->mWeights[wi].mWeight); - last_index = vi; - } - // yes, "indexes" - sdnode.AddChild("Indexes", subdef_indices); - sdnode.AddChild("Weights", subdef_weights); - } - - // transform is the transform of the mesh, but in bone space. - // if the skeleton is in the bind pose, - // we can take the inverse of the world-space bone transform - // and multiply by the world-space transform of the mesh. - aiMatrix4x4 bone_xform = get_world_transform(bone_node, mScene); - aiMatrix4x4 inverse_bone_xform = bone_xform; - inverse_bone_xform.Inverse(); - aiMatrix4x4 tr = inverse_bone_xform * mesh_xform; - - sdnode.AddChild("Transform", tr); - - - sdnode.AddChild("TransformLink", bone_xform); - // note: this means we ALWAYS rely on the mesh node transform - // being unchanged from the time the skeleton was bound. - // there's not really any way around this at the moment. - - // done - sdnode.Dump(outstream, binary, indent); - - // lastly, connect to the parent deformer - connections.emplace_back( - "C", "OO", subdeformer_uid, deformer_uid - ); - - // we also need to connect the limb node to the subdeformer. - connections.emplace_back( - "C", "OO", node_uids[bone_node], subdeformer_uid - ); - } - - // if we cannot create a valid FBX file, simply die. - // this will both prevent unnecessary bug reports, - // and tell the user what they can do to fix the situation - // (i.e. export their model in the bind pose). - if (no_offset_matrix.size() && not_in_bind_pose.size()) { - std::stringstream err; - err << "Not enough information to construct bind pose"; - err << " for mesh " << mi << "!"; - err << " Transform matrix for bone \""; - err << (*not_in_bind_pose.begin())->mName.C_Str() << "\""; - if (not_in_bind_pose.size() > 1) { - err << " (and " << not_in_bind_pose.size() - 1 << " more)"; - } - err << " does not match mOffsetMatrix,"; - err << " and node \""; - err << (*no_offset_matrix.begin())->mName.C_Str() << "\""; - if (no_offset_matrix.size() > 1) { - err << " (and " << no_offset_matrix.size() - 1 << " more)"; - } - err << " has no offset matrix to rely on."; - err << " Please ensure bones are in the bind pose to export."; - throw DeadlyExportError(err.str()); - } - - } - - // BindPose - // - // This is a legacy system, which should be unnecessary. - // - // Somehow including it slows file loading by the official FBX SDK, - // and as it can reconstruct it from the deformers anyway, - // this is not currently included. - // - // The code is kept here in case it's useful in the future, - // but it's pretty much a hack anyway, - // as assimp doesn't store bindpose information for full skeletons. - // - /*for (size_t mi = 0; mi < mScene->mNumMeshes; ++mi) { - aiMesh* mesh = mScene->mMeshes[mi]; - if (! mesh->HasBones()) { continue; } - int64_t bindpose_uid = generate_uid(); - FBX::Node bpnode("Pose"); - bpnode.AddProperty(bindpose_uid); - // note: this uid is never linked or connected to anything. - bpnode.AddProperty(FBX::SEPARATOR + "Pose"); // blank name - bpnode.AddProperty("BindPose"); - - bpnode.AddChild("Type", "BindPose"); - bpnode.AddChild("Version", int32_t(100)); - - aiNode* mesh_node = get_node_for_mesh(mi, mScene->mRootNode); - - // next get the whole skeleton for this mesh. - // we need it all to define the bindpose section. - // the FBX SDK will complain if it's missing, - // and also if parents of used bones don't have a subdeformer. - // order shouldn't matter. - std::set<aiNode*> skeleton; - for (size_t bi = 0; bi < mesh->mNumBones; ++bi) { - // bone node should have already been indexed - const aiBone* b = mesh->mBones[bi]; - const std::string bone_name(b->mName.C_Str()); - aiNode* parent = node_by_bone[bone_name]; - // insert all nodes down to the root or mesh node - while ( - parent - && parent != mScene->mRootNode - && parent != mesh_node - ) { - skeleton.insert(parent); - parent = parent->mParent; - } - } - - // number of pose nodes. includes one for the mesh itself. - bpnode.AddChild("NbPoseNodes", int32_t(1 + skeleton.size())); - - // the first pose node is always the mesh itself - FBX::Node pose("PoseNode"); - pose.AddChild("Node", mesh_uids[mi]); - aiMatrix4x4 mesh_node_xform = get_world_transform(mesh_node, mScene); - pose.AddChild("Matrix", mesh_node_xform); - bpnode.AddChild(pose); - - for (aiNode* bonenode : skeleton) { - // does this node have a uid yet? - int64_t node_uid; - auto node_uid_iter = node_uids.find(bonenode); - if (node_uid_iter != node_uids.end()) { - node_uid = node_uid_iter->second; - } else { - node_uid = generate_uid(); - node_uids[bonenode] = node_uid; - } - - // make a pose thingy - pose = FBX::Node("PoseNode"); - pose.AddChild("Node", node_uid); - aiMatrix4x4 node_xform = get_world_transform(bonenode, mScene); - pose.AddChild("Matrix", node_xform); - bpnode.AddChild(pose); - } - - // now write it - bpnode.Dump(outstream, binary, indent); - }*/ - - // lights - indent = 1; - lights_uids.clear(); - for (size_t li = 0; li < mScene->mNumLights; ++li) { - aiLight* l = mScene->mLights[li]; - - int64_t uid = generate_uid(); - const std::string lightNodeAttributeName = l->mName.C_Str() + FBX::SEPARATOR + "NodeAttribute"; - - FBX::Node lna("NodeAttribute"); - lna.AddProperties(uid, lightNodeAttributeName, "Light"); - FBX::Node lnap("Properties70"); - - // Light color. - lnap.AddP70colorA("Color", l->mColorDiffuse.r, l->mColorDiffuse.g, l->mColorDiffuse.b); - - // TODO Assimp light description is quite concise and do not handle light intensity. - // Default value to 1000W. - lnap.AddP70numberA("Intensity", 1000); - - // FBXLight::EType conversion - switch (l->mType) { - case aiLightSource_POINT: - lnap.AddP70enum("LightType", 0); - break; - case aiLightSource_DIRECTIONAL: - lnap.AddP70enum("LightType", 1); - break; - case aiLightSource_SPOT: - lnap.AddP70enum("LightType", 2); - lnap.AddP70numberA("InnerAngle", AI_RAD_TO_DEG(l->mAngleInnerCone)); - lnap.AddP70numberA("OuterAngle", AI_RAD_TO_DEG(l->mAngleOuterCone)); - break; - // TODO Assimp do not handle 'area' nor 'volume' lights, but FBX does. - /*case aiLightSource_AREA: - lnap.AddP70enum("LightType", 3); - lnap.AddP70enum("AreaLightShape", 0); // 0=Rectangle, 1=Sphere - break; - case aiLightSource_VOLUME: - lnap.AddP70enum("LightType", 4); - break;*/ - default: - break; - } - - // Did not understood how to configure the decay so disabling attenuation. - lnap.AddP70enum("DecayType", 0); - - // Dump to FBX stream - lna.AddChild(lnap); - lna.AddChild("TypeFlags", FBX::FBXExportProperty("Light")); - lna.AddChild("GeometryVersion", FBX::FBXExportProperty(int32_t(124))); - lna.Dump(outstream, binary, indent); - - // Store name and uid (will be used later when parsing scene nodes) - lights_uids[l->mName.C_Str()] = uid; - } - - // TODO: cameras - - // write nodes (i.e. model hierarchy) - // start at root node - WriteModelNodes( - outstream, mScene->mRootNode, 0, limbnodes - ); - - // animations - // - // in FBX there are: - // * AnimationStack - corresponds to an aiAnimation - // * AnimationLayer - a combinable animation component - // * AnimationCurveNode - links the property to be animated - // * AnimationCurve - defines animation data for a single property value - // - // the CurveNode also provides the default value for a property, - // such as the X, Y, Z coordinates for animatable translation. - // - // the Curve only specifies values for one component of the property, - // so there will be a separate AnimationCurve for X, Y, and Z. - // - // Assimp has: - // * aiAnimation - basically corresponds to an AnimationStack - // * aiNodeAnim - defines all animation for one aiNode - // * aiVectorKey/aiQuatKey - define the keyframe data for T/R/S - // - // assimp has no equivalent for AnimationLayer, - // and these are flattened on FBX import. - // we can assume there will be one per AnimationStack. - // - // the aiNodeAnim contains all animation data for a single aiNode, - // which will correspond to three AnimationCurveNode's: - // one each for translation, rotation and scale. - // The data for each of these will be put in 9 AnimationCurve's, - // T.X, T.Y, T.Z, R.X, R.Y, R.Z, etc. - - // AnimationStack / aiAnimation - std::vector<int64_t> animation_stack_uids(mScene->mNumAnimations); - for (size_t ai = 0; ai < mScene->mNumAnimations; ++ai) { - int64_t animstack_uid = generate_uid(); - animation_stack_uids[ai] = animstack_uid; - const aiAnimation* anim = mScene->mAnimations[ai]; - - FBX::Node asnode("AnimationStack"); - std::string name = anim->mName.C_Str() + FBX::SEPARATOR + "AnimStack"; - asnode.AddProperties(animstack_uid, name, ""); - FBX::Node p("Properties70"); - p.AddP70time("LocalStart", 0); // assimp doesn't store this - p.AddP70time("LocalStop", to_ktime(anim->mDuration, anim)); - p.AddP70time("ReferenceStart", 0); - p.AddP70time("ReferenceStop", to_ktime(anim->mDuration, anim)); - asnode.AddChild(p); - - // this node absurdly always pretends it has children - // (in this case it does, but just in case...) - asnode.force_has_children = true; - asnode.Dump(outstream, binary, indent); - - // note: animation stacks are not connected to anything - } - - // AnimationLayer - one per aiAnimation - std::vector<int64_t> animation_layer_uids(mScene->mNumAnimations); - for (size_t ai = 0; ai < mScene->mNumAnimations; ++ai) { - int64_t animlayer_uid = generate_uid(); - animation_layer_uids[ai] = animlayer_uid; - FBX::Node alnode("AnimationLayer"); - alnode.AddProperties(animlayer_uid, FBX::SEPARATOR + "AnimLayer", ""); - - // this node absurdly always pretends it has children - alnode.force_has_children = true; - alnode.Dump(outstream, binary, indent); - - // connect to the relevant animstack - connections.emplace_back( - "C", "OO", animlayer_uid, animation_stack_uids[ai] - ); - } - - // AnimCurveNode - three per aiNodeAnim - std::vector<std::vector<std::array<int64_t,3>>> curve_node_uids; - for (size_t ai = 0; ai < mScene->mNumAnimations; ++ai) { - const aiAnimation* anim = mScene->mAnimations[ai]; - const int64_t layer_uid = animation_layer_uids[ai]; - std::vector<std::array<int64_t,3>> nodeanim_uids; - for (size_t nai = 0; nai < anim->mNumChannels; ++nai) { - const aiNodeAnim* na = anim->mChannels[nai]; - // get the corresponding aiNode - const aiNode* node = mScene->mRootNode->FindNode(na->mNodeName); - // and its transform - const aiMatrix4x4 node_xfm = get_world_transform(node, mScene); - aiVector3D T, R, S; - node_xfm.Decompose(S, R, T); - - // AnimationCurveNode uids - std::array<int64_t,3> ids; - ids[0] = generate_uid(); // T - ids[1] = generate_uid(); // R - ids[2] = generate_uid(); // S - - // translation - WriteAnimationCurveNode(outstream, - ids[0], "T", T, "Lcl Translation", - layer_uid, node_uids[node] - ); - - // rotation - WriteAnimationCurveNode(outstream, - ids[1], "R", R, "Lcl Rotation", - layer_uid, node_uids[node] - ); - - // scale - WriteAnimationCurveNode(outstream, - ids[2], "S", S, "Lcl Scale", - layer_uid, node_uids[node] - ); - - // store the uids for later use - nodeanim_uids.push_back(ids); - } - curve_node_uids.push_back(nodeanim_uids); - } - - // AnimCurve - defines actual keyframe data. - // there's a separate curve for every component of every vector, - // for example a transform curvenode will have separate X/Y/Z AnimCurve's - for (size_t ai = 0; ai < mScene->mNumAnimations; ++ai) { - const aiAnimation* anim = mScene->mAnimations[ai]; - for (size_t nai = 0; nai < anim->mNumChannels; ++nai) { - const aiNodeAnim* na = anim->mChannels[nai]; - // get the corresponding aiNode - const aiNode* node = mScene->mRootNode->FindNode(na->mNodeName); - // and its transform - const aiMatrix4x4 node_xfm = get_world_transform(node, mScene); - aiVector3D T, R, S; - node_xfm.Decompose(S, R, T); - const std::array<int64_t,3>& ids = curve_node_uids[ai][nai]; - - std::vector<int64_t> times; - std::vector<float> xval, yval, zval; - - // position/translation - for (size_t ki = 0; ki < na->mNumPositionKeys; ++ki) { - const aiVectorKey& k = na->mPositionKeys[ki]; - times.push_back(to_ktime(k.mTime)); - xval.push_back(k.mValue.x); - yval.push_back(k.mValue.y); - zval.push_back(k.mValue.z); - } - // one curve each for X, Y, Z - WriteAnimationCurve(outstream, T.x, times, xval, ids[0], "d|X"); - WriteAnimationCurve(outstream, T.y, times, yval, ids[0], "d|Y"); - WriteAnimationCurve(outstream, T.z, times, zval, ids[0], "d|Z"); - - // rotation - times.clear(); xval.clear(); yval.clear(); zval.clear(); - for (size_t ki = 0; ki < na->mNumRotationKeys; ++ki) { - const aiQuatKey& k = na->mRotationKeys[ki]; - times.push_back(to_ktime(k.mTime)); - // TODO: aiQuaternion method to convert to Euler... - aiMatrix4x4 m(k.mValue.GetMatrix()); - aiVector3D qs, qr, qt; - m.Decompose(qs, qr, qt); - qr *= DEG; - xval.push_back(qr.x); - yval.push_back(qr.y); - zval.push_back(qr.z); - } - WriteAnimationCurve(outstream, R.x, times, xval, ids[1], "d|X"); - WriteAnimationCurve(outstream, R.y, times, yval, ids[1], "d|Y"); - WriteAnimationCurve(outstream, R.z, times, zval, ids[1], "d|Z"); - - // scaling/scale - times.clear(); xval.clear(); yval.clear(); zval.clear(); - for (size_t ki = 0; ki < na->mNumScalingKeys; ++ki) { - const aiVectorKey& k = na->mScalingKeys[ki]; - times.push_back(to_ktime(k.mTime)); - xval.push_back(k.mValue.x); - yval.push_back(k.mValue.y); - zval.push_back(k.mValue.z); - } - WriteAnimationCurve(outstream, S.x, times, xval, ids[2], "d|X"); - WriteAnimationCurve(outstream, S.y, times, yval, ids[2], "d|Y"); - WriteAnimationCurve(outstream, S.z, times, zval, ids[2], "d|Z"); - } - } - - indent = 0; - object_node.End(outstream, binary, indent, true); -} - -// convenience map of magic node name strings to FBX properties, -// including the expected type of transform. -const std::map<std::string,std::pair<std::string,char>> transform_types = { - {"Translation", {"Lcl Translation", 't'}}, - {"RotationOffset", {"RotationOffset", 't'}}, - {"RotationPivot", {"RotationPivot", 't'}}, - {"PreRotation", {"PreRotation", 'r'}}, - {"Rotation", {"Lcl Rotation", 'r'}}, - {"PostRotation", {"PostRotation", 'r'}}, - {"RotationPivotInverse", {"RotationPivotInverse", 'i'}}, - {"ScalingOffset", {"ScalingOffset", 't'}}, - {"ScalingPivot", {"ScalingPivot", 't'}}, - {"Scaling", {"Lcl Scaling", 's'}}, - {"ScalingPivotInverse", {"ScalingPivotInverse", 'i'}}, - {"GeometricScaling", {"GeometricScaling", 's'}}, - {"GeometricRotation", {"GeometricRotation", 'r'}}, - {"GeometricTranslation", {"GeometricTranslation", 't'}}, - {"GeometricTranslationInverse", {"GeometricTranslationInverse", 'i'}}, - {"GeometricRotationInverse", {"GeometricRotationInverse", 'i'}}, - {"GeometricScalingInverse", {"GeometricScalingInverse", 'i'}} -}; - -// write a single model node to the stream -void FBXExporter::WriteModelNode( - StreamWriterLE& outstream, - bool, - const aiNode* node, - int64_t node_uid, - const std::string& type, - const std::vector<std::pair<std::string,aiVector3D>>& transform_chain, - TransformInheritance inherit_type -){ - const aiVector3D zero = {0, 0, 0}; - const aiVector3D one = {1, 1, 1}; - FBX::Node m("Model"); - std::string name = node->mName.C_Str() + FBX::SEPARATOR + "Model"; - m.AddProperties(node_uid, name, type); - m.AddChild("Version", int32_t(232)); - FBX::Node p("Properties70"); - p.AddP70bool("RotationActive", 1); - p.AddP70int("DefaultAttributeIndex", 0); - p.AddP70enum("InheritType", inherit_type); - if (transform_chain.empty()) { - // decompose 4x4 transform matrix into TRS - aiVector3D t, r, s; - node->mTransformation.Decompose(s, r, t); - if (t != zero) { - p.AddP70( - "Lcl Translation", "Lcl Translation", "", "A", - double(t.x), double(t.y), double(t.z) - ); - } - if (r != zero) { - p.AddP70( - "Lcl Rotation", "Lcl Rotation", "", "A", - double(DEG*r.x), double(DEG*r.y), double(DEG*r.z) - ); - } - if (s != one) { - p.AddP70( - "Lcl Scaling", "Lcl Scaling", "", "A", - double(s.x), double(s.y), double(s.z) - ); - } - } else { - // apply the transformation chain. - // these transformation elements are created when importing FBX, - // which has a complex transformation hierarchy for each node. - // as such we can bake the hierarchy back into the node on export. - for (auto &item : transform_chain) { - auto elem = transform_types.find(item.first); - if (elem == transform_types.end()) { - // then this is a bug - std::stringstream err; - err << "unrecognized FBX transformation type: "; - err << item.first; - throw DeadlyExportError(err.str()); - } - const std::string &cur_name = elem->second.first; - const aiVector3D &v = item.second; - if (cur_name.compare(0, 4, "Lcl ") == 0) { - // special handling for animatable properties - p.AddP70( cur_name, cur_name, "", "A", double(v.x), double(v.y), double(v.z) ); - } else { - p.AddP70vector(cur_name, v.x, v.y, v.z); - } - } - } - m.AddChild(p); - - // not sure what these are for, - // but they seem to be omnipresent - m.AddChild("Shading", FBXExportProperty(true)); - m.AddChild("Culling", FBXExportProperty("CullingOff")); - - m.Dump(outstream, binary, 1); -} - -// wrapper for WriteModelNodes to create and pass a blank transform chain -void FBXExporter::WriteModelNodes( - StreamWriterLE& s, - const aiNode* node, - int64_t parent_uid, - const std::unordered_set<const aiNode*>& limbnodes -) { - std::vector<std::pair<std::string,aiVector3D>> chain; - WriteModelNodes(s, node, parent_uid, limbnodes, chain); -} - -void FBXExporter::WriteModelNodes( - StreamWriterLE& outstream, - const aiNode* node, - int64_t parent_uid, - const std::unordered_set<const aiNode*>& limbnodes, - std::vector<std::pair<std::string,aiVector3D>>& transform_chain -) { - // first collapse any expanded transformation chains created by FBX import. - std::string node_name(node->mName.C_Str()); - if (node_name.find(MAGIC_NODE_TAG) != std::string::npos) { - auto pos = node_name.find(MAGIC_NODE_TAG) + MAGIC_NODE_TAG.size() + 1; - std::string type_name = node_name.substr(pos); - auto elem = transform_types.find(type_name); - if (elem == transform_types.end()) { - // then this is a bug and should be fixed - std::stringstream err; - err << "unrecognized FBX transformation node"; - err << " of type " << type_name << " in node " << node_name; - throw DeadlyExportError(err.str()); - } - aiVector3D t, r, s; - node->mTransformation.Decompose(s, r, t); - switch (elem->second.second) { - case 'i': // inverse - // we don't need to worry about the inverse matrices - break; - case 't': // translation - transform_chain.emplace_back(elem->first, t); - break; - case 'r': // rotation - r *= float(DEG); - transform_chain.emplace_back(elem->first, r); - break; - case 's': // scale - transform_chain.emplace_back(elem->first, s); - break; - default: - // this should never happen - std::stringstream err; - err << "unrecognized FBX transformation type code: "; - err << elem->second.second; - throw DeadlyExportError(err.str()); - } - // now continue on to any child nodes - for (unsigned i = 0; i < node->mNumChildren; ++i) { - WriteModelNodes( - outstream, - node->mChildren[i], - parent_uid, - limbnodes, - transform_chain - ); - } - return; - } - - int64_t node_uid = 0; - // generate uid and connect to parent, if not the root node, - if (node != mScene->mRootNode) { - auto elem = node_uids.find(node); - if (elem != node_uids.end()) { - node_uid = elem->second; - } else { - node_uid = generate_uid(); - node_uids[node] = node_uid; - } - connections.emplace_back("C", "OO", node_uid, parent_uid); - } - - // what type of node is this? - if (node == mScene->mRootNode) { - // handled later - } else if (node->mNumMeshes == 1) { - // connect to child mesh, which should have been written previously - connections.emplace_back( - "C", "OO", mesh_uids[node->mMeshes[0]], node_uid - ); - // also connect to the material for the child mesh - connections.emplace_back( - "C", "OO", - material_uids[mScene->mMeshes[node->mMeshes[0]]->mMaterialIndex], - node_uid - ); - // write model node - WriteModelNode( - outstream, binary, node, node_uid, "Mesh", transform_chain - ); - } else if (limbnodes.count(node)) { - WriteModelNode( - outstream, binary, node, node_uid, "LimbNode", transform_chain - ); - // we also need to write a nodeattribute to mark it as a skeleton - int64_t node_attribute_uid = generate_uid(); - FBX::Node na("NodeAttribute"); - na.AddProperties( - node_attribute_uid, FBX::SEPARATOR + "NodeAttribute", "LimbNode" - ); - na.AddChild("TypeFlags", FBXExportProperty("Skeleton")); - na.Dump(outstream, binary, 1); - // and connect them - connections.emplace_back("C", "OO", node_attribute_uid, node_uid); - } else { - const auto& lightIt = lights_uids.find(node->mName.C_Str()); - if(lightIt != lights_uids.end()) { - // Node has a light connected to it. - WriteModelNode( - outstream, binary, node, node_uid, "Light", transform_chain - ); - connections.emplace_back("C", "OO", lightIt->second, node_uid); - } else { - // generate a null node so we can add children to it - WriteModelNode( - outstream, binary, node, node_uid, "Null", transform_chain - ); - } - } - - // if more than one child mesh, make nodes for each mesh - if (node->mNumMeshes > 1 || node == mScene->mRootNode) { - for (size_t i = 0; i < node->mNumMeshes; ++i) { - // make a new model node - int64_t new_node_uid = generate_uid(); - // connect to parent node - connections.emplace_back("C", "OO", new_node_uid, node_uid); - // connect to child mesh, which should have been written previously - connections.emplace_back( - "C", "OO", mesh_uids[node->mMeshes[i]], new_node_uid - ); - // also connect to the material for the child mesh - connections.emplace_back( - "C", "OO", - material_uids[ - mScene->mMeshes[node->mMeshes[i]]->mMaterialIndex - ], - new_node_uid - ); - - aiNode new_node; - // take name from mesh name, if it exists - new_node.mName = mScene->mMeshes[node->mMeshes[i]]->mName; - // write model node - WriteModelNode( - outstream, binary, &new_node, new_node_uid, "Mesh", std::vector<std::pair<std::string,aiVector3D>>() - ); - } - } - - // now recurse into children - for (size_t i = 0; i < node->mNumChildren; ++i) { - WriteModelNodes( - outstream, node->mChildren[i], node_uid, limbnodes - ); - } -} - -void FBXExporter::WriteAnimationCurveNode( - StreamWriterLE &outstream, - int64_t uid, - const std::string &name, // "T", "R", or "S" - aiVector3D default_value, - const std::string &property_name, // "Lcl Translation" etc - int64_t layer_uid, - int64_t node_uid) { - FBX::Node n("AnimationCurveNode"); - n.AddProperties(uid, name + FBX::SEPARATOR + "AnimCurveNode", ""); - FBX::Node p("Properties70"); - p.AddP70numberA("d|X", default_value.x); - p.AddP70numberA("d|Y", default_value.y); - p.AddP70numberA("d|Z", default_value.z); - n.AddChild(p); - n.Dump(outstream, binary, 1); - // connect to layer - this->connections.emplace_back("C", "OO", uid, layer_uid); - // connect to bone - this->connections.emplace_back("C", "OP", uid, node_uid, property_name); -} - -void FBXExporter::WriteAnimationCurve( - StreamWriterLE& outstream, - double default_value, - const std::vector<int64_t>& times, - const std::vector<float>& values, - int64_t curvenode_uid, - const std::string& property_link // "d|X", "d|Y", etc -) { - FBX::Node n("AnimationCurve"); - int64_t curve_uid = generate_uid(); - n.AddProperties(curve_uid, FBX::SEPARATOR + "AnimCurve", ""); - n.AddChild("Default", default_value); - n.AddChild("KeyVer", int32_t(4009)); - n.AddChild("KeyTime", times); - n.AddChild("KeyValueFloat", values); - // TODO: keyattr flags and data (STUB for now) - n.AddChild("KeyAttrFlags", std::vector<int32_t>{0}); - n.AddChild("KeyAttrDataFloat", std::vector<float>{0,0,0,0}); - n.AddChild( - "KeyAttrRefCount", - std::vector<int32_t>{static_cast<int32_t>(times.size())} - ); - n.Dump(outstream, binary, 1); - this->connections.emplace_back( - "C", "OP", curve_uid, curvenode_uid, property_link - ); -} - - -void FBXExporter::WriteConnections () -{ - // we should have completed the connection graph already, - // so basically just dump it here - if (!binary) { - WriteAsciiSectionHeader("Object connections"); - } - // TODO: comments with names in the ascii version - FBX::Node conn("Connections"); - StreamWriterLE outstream(outfile); - conn.Begin(outstream, binary, 0); - conn.BeginChildren(outstream, binary, 0); - for (auto &n : connections) { - n.Dump(outstream, binary, 1); - } - conn.End(outstream, binary, 0, !connections.empty()); - connections.clear(); -} - -#endif // ASSIMP_BUILD_NO_FBX_EXPORTER -#endif // ASSIMP_BUILD_NO_EXPORT |