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Writer3MF.cpp
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Writer3MF.cpp
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/***************************************************************************
* Copyright (c) 2022 Werner Mayer <wmayer[at]users.sourceforge.net> *
* *
* This file is part of the FreeCAD CAx development system. *
* *
* This library is free software; you can redistribute it and/or *
* modify it under the terms of the GNU Library General Public *
* License as published by the Free Software Foundation; either *
* version 2 of the License, or (at your option) any later version. *
* *
* This library is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU Library General Public License for more details. *
* *
* You should have received a copy of the GNU Library General Public *
* License along with this library; see the file COPYING.LIB. If not, *
* write to the Free Software Foundation, Inc., 59 Temple Place, *
* Suite 330, Boston, MA 02111-1307, USA *
* *
***************************************************************************/
#include "PreCompiled.h"
#ifndef _PreComp_
#include <ostream>
#include <sstream>
#endif
#include "Core/Evaluation.h"
#include "Core/MeshKernel.h"
#include <Base/Tools.h>
#include "Writer3MF.h"
using namespace MeshCore;
Writer3MF::Writer3MF(std::ostream& str)
: zip(str)
{
zip.putNextEntry("3D/3dmodel.model");
Initialize(zip);
}
Writer3MF::Writer3MF(const std::string& filename)
: zip(filename)
{
zip.putNextEntry("3D/3dmodel.model");
Initialize(zip);
}
void Writer3MF::SetForceModel(bool model)
{
forceModel = model;
}
void Writer3MF::Initialize(std::ostream& str)
{
str << "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
"<model unit=\"millimeter\" xml:lang=\"en-US\" "
"xmlns=\"http://schemas.microsoft.com/3dmanufacturing/core/2015/02\">\n"
" <metadata name=\"Application\">FreeCAD</metadata>\n";
str << Base::blanks(1) << "<resources>\n";
}
void Writer3MF::Finish(std::ostream& str)
{
str << Base::blanks(1) << "</resources>\n";
str << Base::blanks(1) << "<build>\n";
for (const auto& it : items) {
str << Base::blanks(2) << it;
}
str << Base::blanks(1) << "</build>\n";
str << "</model>\n";
}
bool Writer3MF::AddMesh(const MeshKernel& mesh, const Base::Matrix4D& mat)
{
int id = ++objectIndex;
SaveBuildItem(id, mat);
return SaveObject(zip, id, mesh);
}
void Writer3MF::AddResource(const Resource3MF& res)
{
resources.emplace_back(res);
}
bool Writer3MF::Save()
{
Finish(zip);
zip.closeEntry();
zip.putNextEntry("_rels/.rels");
if (!SaveRels(zip)) {
return false;
}
zip.closeEntry();
zip.putNextEntry("[Content_Types].xml");
if (!SaveContent(zip)) {
return false;
}
zip.closeEntry();
for (const auto& it : resources) {
zip.putNextEntry(it.fileNameInZip);
zip.write(it.fileContent.data(), static_cast<std::streamsize>(it.fileContent.size()));
zip.closeEntry();
}
return true;
}
bool Writer3MF::SaveObject(std::ostream& str, int id, const MeshKernel& mesh) const
{
// NOLINTBEGIN(readability-magic-numbers, cppcoreguidelines-avoid-magic-numbers)
const MeshPointArray& rPoints = mesh.GetPoints();
const MeshFacetArray& rFacets = mesh.GetFacets();
if (!str || str.bad()) {
return false;
}
str << Base::blanks(2) << "<object id=\"" << id << "\" type=\"" << GetType(mesh) << "\">\n";
str << Base::blanks(3) << "<mesh>\n";
// vertices
str << Base::blanks(4) << "<vertices>\n";
std::size_t index = 0;
for (auto it = rPoints.begin(); it != rPoints.end(); ++it, ++index) {
str << Base::blanks(5) << "<vertex x=\"" << it->x << "\" y=\"" << it->y << "\" z=\""
<< it->z << "\" />\n";
}
str << Base::blanks(4) << "</vertices>\n";
// facet indices
str << Base::blanks(4) << "<triangles>\n";
for (const auto& it : rFacets) {
str << Base::blanks(5) << "<triangle v1=\"" << it._aulPoints[0] << "\" v2=\""
<< it._aulPoints[1] << "\" v3=\"" << it._aulPoints[2] << "\" />\n";
}
str << Base::blanks(4) << "</triangles>\n";
str << Base::blanks(3) << "</mesh>\n";
str << Base::blanks(2) << "</object>\n";
// NOLINTEND(readability-magic-numbers, cppcoreguidelines-avoid-magic-numbers)
return true;
}
std::string Writer3MF::GetType(const MeshKernel& mesh) const
{
bool isSolid = (forceModel || MeshEvalSolid(mesh).Evaluate());
return isSolid ? "model" : "surface";
}
void Writer3MF::SaveBuildItem(int id, const Base::Matrix4D& mat)
{
std::stringstream str;
str << "<item objectid=\"" << id << "\" transform=\"" << DumpMatrix(mat) << "\" />\n";
items.push_back(str.str());
}
std::string Writer3MF::DumpMatrix(const Base::Matrix4D& mat)
{
// NOLINTBEGIN(cppcoreguidelines-pro-bounds-pointer-arithmetic)
// The matrix representation in the specs is the transposed version of Matrix4D
// This means that for the 3x3 sub-matrix the indices must be swapped
//
// 3D Manufacturing Format / Core Specification & Reference Guide v1.2.3
// Chapter: 3.3 3D Matrices (page 9)
std::stringstream str;
str << mat[0][0] << " " << mat[1][0] << " " << mat[2][0] << " " << mat[0][1] << " " << mat[1][1]
<< " " << mat[2][1] << " " << mat[0][2] << " " << mat[1][2] << " " << mat[2][2] << " "
<< mat[0][3] << " " << mat[1][3] << " " << mat[2][3];
return str.str();
// NOLINTEND(cppcoreguidelines-pro-bounds-pointer-arithmetic)
}
bool Writer3MF::SaveRels(std::ostream& str) const
{
// NOLINTBEGIN(modernize-raw-string-literal)
int ids = 1;
str << "<?xml version='1.0' encoding='UTF-8'?>\n"
<< "<Relationships "
"xmlns=\"http://schemas.openxmlformats.org/package/2006/relationships\">\n"
<< " <Relationship Target=\"/3D/3dmodel.model\" Id=\"rel0\""
<< " Type=\"http://schemas.microsoft.com/3dmanufacturing/2013/01/3dmodel\" />\n";
for (const auto& it : resources) {
str << " <Relationship Target=\"" << it.relationshipTarget << "\" Id=\"rel" << ++ids
<< "\" Type=\"" << it.relationshipType << "\" />\n";
}
str << "</Relationships>\n";
return true;
// NOLINTEND(modernize-raw-string-literal)
}
bool Writer3MF::SaveContent(std::ostream& str) const
{
str << "<?xml version='1.0' encoding='UTF-8'?>\n"
<< "<Types xmlns=\"http://schemas.openxmlformats.org/package/2006/content-types\">\n"
<< " <Default Extension=\"rels\" "
"ContentType=\"application/vnd.openxmlformats-package.relationships+xml\"/>\n"
<< " <Default Extension=\"model\" "
"ContentType=\"application/vnd.ms-package.3dmanufacturing-3dmodel+xml\"/>\n";
for (const auto& it : resources) {
str << " <Default Extension=\"" << it.extension << "\" ContentType=\"" << it.contentType
<< "\"/>\n";
}
str << "</Types>";
return true;
}