assimp.assimp/code/D3MFExporter.cpp

/*
Open Asset Import Library (assimp)
----------------------------------------------------------------------

Copyright (c) 2006-2017, 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
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* Redistributions of source code must retain the above
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following disclaimer.

* Redistributions in binary form must reproduce the above
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following disclaimer in the documentation and/or other
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* Neither the name of the assimp team, nor the names of its
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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,
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*/
#include "D3MFExporter.h"

#include <assimp/scene.h>
#include <assimp/IOSystem.hpp>
#include <assimp//IOStream.hpp>
#include <assimp/Exporter.hpp>
#include <assimp/DefaultLogger.hpp>

#include "Exceptional.h"
#include "3MFXmlTags.h"
#include "D3MFOpcPackage.h"

#include <contrib/zip/src/zip.h>

namespace Assimp {

void ExportScene3MF( const char* pFile, IOSystem* pIOSystem, const aiScene* pScene, const ExportProperties* /*pProperties*/ ) {
    D3MF::D3MFExporter myExporter( pFile, pIOSystem, pScene );
    if ( myExporter.validate() ) {
        bool ok = myExporter.exportArchive(pFile);
        if ( !ok ) {
            throw DeadlyExportError( "Could not export 3MP archive: " + std::string( pFile ) );
        }
    }
}

namespace D3MF {

#ifndef ASSIMP_BUILD_NO3MF_EXPORTER

D3MFExporter::D3MFExporter( const char* pFile, IOSystem* pIOSystem, const aiScene* pScene )
: mIOSystem( pIOSystem )
, mArchiveName( pFile )
, m_zipArchive( nullptr )
, mScene( pScene )
, mBuildItems()
, mRelations() {
    // empty
}

D3MFExporter::~D3MFExporter() {
    for ( size_t i = 0; i < mRelations.size(); ++i ) {
        delete mRelations[ i ];
    }
    mRelations.clear();
}

bool D3MFExporter::validate() {
    if ( mArchiveName.empty() ) {
        return false;
    }

    if ( nullptr == mScene ) {
        return false;
    }

    return true;
}

bool D3MFExporter::exportArchive( const char *file ) {
    bool ok( true );

    m_zipArchive = zip_open( file, ZIP_DEFAULT_COMPRESSION_LEVEL, 'w' );
    if ( nullptr == m_zipArchive ) {
        return false;
    }
    ok |= exportRelations();
    ok |= export3DModel();

    return ok;
}

bool D3MFExporter::exportRelations() {
    mOutput.clear();

    mOutput << "<?xml version = \"1.0\" encoding = \"UTF-8\"?>\n";
    mOutput << "<Relationships xmlns=\"http://schemas.openxmlformats.org/package/2006/relationships\">\n";

    for ( size_t i = 0; i < mRelations.size(); ++i ) {
        mOutput << "<Relationship Target =\"/3D/" << mRelations[ i ]->target << " ";
        mOutput << "id=\"" << mRelations[i]->id << " ";
        mOutput << "Type=\"" << mRelations[ i ]->type << "/>\n";
    }
    mOutput << "</Relationships>\n";

    writeRelInfoToFile( "_rels", ".rels" );

    return true;
}

bool D3MFExporter::export3DModel() {
    mOutput.clear();

    writeHeader();
    mOutput << "<" << XmlTag::model << " " << XmlTag::model_unit << "=\"millimeter\""
            << "xmlns=\"http://schemas.microsoft.com/3dmanufacturing/core/2015/02\">"
            << "\n";
    mOutput << "<" << XmlTag::resources << ">\n";

    writeObjects();


    mOutput << "</" << XmlTag::resources << ">\n";
    writeBuild();

    mOutput << "</" << XmlTag::model << ">\n";

    OpcPackageRelationship *info = new OpcPackageRelationship;
    info->id = mArchiveName;
    info->target = "rel0";
    info->type = "http://schemas.microsoft.com/3dmanufacturing/2013/01/3dmodel";
    mRelations.push_back( info );

    writeModelToArchive( "3D", mArchiveName );

    mOutput.clear();

    return true;
}

void D3MFExporter::writeHeader() {
    mOutput << "<?xml version=\"1.0\" encoding=\"UTF - 8\"?>" << "\n";
}

void D3MFExporter::writeObjects() {
    if ( nullptr == mScene->mRootNode ) {
        return;
    }

    aiNode *root = mScene->mRootNode;
    for ( unsigned int i = 0; i < root->mNumChildren; ++i ) {
        aiNode *currentNode( root->mChildren[ i ] );
        if ( nullptr == currentNode ) {
            continue;
        }
        mOutput << "<" << XmlTag::object << " id=\"" << currentNode->mName.C_Str() << "\" type=\"model\">\n";
        for ( unsigned int j = 0; j < currentNode->mNumMeshes; ++j ) {
            aiMesh *currentMesh = mScene->mMeshes[ currentNode->mMeshes[ j ] ];
            if ( nullptr == currentMesh ) {
                continue;
            }
            writeMesh( currentMesh );
        }
        mBuildItems.push_back( i );

        mOutput << "</" << XmlTag::object << ">\n";
    }
}

void D3MFExporter::writeMesh( aiMesh *mesh ) {
    if ( nullptr == mesh ) {
        return;
    }

    mOutput << "<" << XmlTag::mesh << ">\n";
    mOutput << "<" << XmlTag::vertices << ">\n";
    for ( unsigned int i = 0; i < mesh->mNumVertices; ++i ) {
        writeVertex( mesh->mVertices[ i ] );
    }
    mOutput << "</" << XmlTag::vertices << ">\n";
    mOutput << "</" << XmlTag::mesh << ">\n";

    writeFaces( mesh );
}

void D3MFExporter::writeVertex( const aiVector3D &pos ) {
    mOutput << "<" << XmlTag::vertex << " x=\"" << pos.x << "\" y=\"" << pos.y << "\" z=\"" << pos.z << "\">\n";
}

void D3MFExporter::writeFaces( aiMesh *mesh ) {
    if ( nullptr == mesh ) {
        return;
    }

    if ( !mesh->HasFaces() ) {
        return;
    }
    mOutput << "<" << XmlTag::triangles << ">\n";
    for ( unsigned int i = 0; i < mesh->mNumFaces; ++i ) {
        aiFace &currentFace = mesh->mFaces[ i ];
        mOutput << "<" << XmlTag::triangle << " v1=\"" << currentFace.mIndices[ 0 ] << "\" v2=\""
                << currentFace.mIndices[ 1 ] << "\" v3=\"" << currentFace.mIndices[ 2 ] << "\"/>\n";
    }
    mOutput << "</" << XmlTag::triangles << ">\n";
}

void D3MFExporter::writeBuild() {
    mOutput << "<" << XmlTag::build << ">\n";

    for ( size_t i = 0; i < mBuildItems.size(); ++i ) {
        mOutput << "<" << XmlTag::item << " objectid=\"" << i + 1 << "\"/>\n";
    }
    mOutput << "</" << XmlTag::build << ">\n";
}

void D3MFExporter::writeModelToArchive( const std::string &folder, const std::string &modelName ) {
    const std::string entry = folder + "/" + mArchiveName;
    zip_entry_open( m_zipArchive, entry.c_str() );

    const std::string &exportTxt( mOutput.str() );
    zip_entry_write( m_zipArchive, exportTxt.c_str(), exportTxt.size() );

    zip_entry_close( m_zipArchive );
}

void D3MFExporter::writeRelInfoToFile( const std::string &folder, const std::string &relName ) {
    const std::string entry = folder + "/" + "_rels";
    zip_entry_open( m_zipArchive, entry.c_str() );
    const std::string &exportTxt( mOutput.str() );
    zip_entry_write( m_zipArchive, exportTxt.c_str(), exportTxt.size() );
    zip_entry_close( m_zipArchive );
}

#endif // ASSIMP_BUILD_NO3MF_EXPORTER

} // Namespace D3MF
} // Namespace Assimp