vitalif
/
openscad
mirror of https://github.com/vitalif/openscad
1
0
Fork 0
Code Issues Releases Wiki Activity
openscad/src/export.cc

561 lines
18 KiB
C++
Raw Permalink Blame History

/*
* OpenSCAD (www.openscad.org)
* Copyright (C) 2009-2011 Clifford Wolf <clifford@clifford.at> and
* Marius Kintel <marius@kintel.net>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* As a special exception, you have permission to link this program
* with the CGAL library and distribute executables, as long as you
* follow the requirements of the GNU GPL in regard to all of the
* software in the executable aside from CGAL.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include "export.h"
#include "printutils.h"
#include "polyset.h"
#include "polyset-utils.h"
#include "dxfdata.h"
#include <boost/foreach.hpp>
#include <boost/algorithm/string.hpp>
#define QUOTE(x__) # x__
#define QUOTED(x__) QUOTE(x__)
#ifdef ENABLE_CGAL
#include "CGAL_Nef_polyhedron.h"
#include "cgal.h"
#include "cgalutils.h"
struct triangle {
std::string vs1;
std::string vs2;
std::string vs3;
};
void exportFile(const class Geometry *root_geom, std::ostream &output, FileFormat format)
{
if (const CGAL_Nef_polyhedron *N = dynamic_cast<const CGAL_Nef_polyhedron *>(root_geom)) {
switch (format) {
case OPENSCAD_STL:
export_stl(N, output);
break;
case OPENSCAD_OFF:
export_off(N, output);
break;
case OPENSCAD_AMF:
export_amf(N, output);
break;
case OPENSCAD_DXF:
assert(false && "Export Nef polyhedron as DXF not supported");
break;
default:
assert(false && "Unknown file format");
}
}
else {
if (const PolySet *ps = dynamic_cast<const PolySet *>(root_geom)) {
switch (format) {
case OPENSCAD_STL:
export_stl(*ps, output);
break;
case OPENSCAD_OFF:
export_off(*ps, output);
break;
case OPENSCAD_AMF:
export_amf(*ps, output);
break;
default:
assert(false && "Unsupported file format");
}
}
else if (const Polygon2d *poly = dynamic_cast<const Polygon2d *>(root_geom)) {
switch (format) {
case OPENSCAD_SVG:
export_svg(*poly, output);
break;
case OPENSCAD_DXF:
export_dxf(*poly, output);
break;
default:
assert(false && "Unsupported file format");
}
} else {
assert(false && "Not implemented");
}
}
}
void exportFileByName(const class Geometry *root_geom, FileFormat format,
const char *name2open, const char *name2display)
{
std::ofstream fstream(name2open);
if (!fstream.is_open()) {
PRINTB("Can't open file \"%s\" for export", name2display);
} else {
bool onerror = false;
fstream.exceptions(std::ios::badbit|std::ios::failbit);
try {
exportFile(root_geom, fstream, format);
} catch (std::ios::failure x) {
onerror = true;
}
try { // make sure file closed - resources released
fstream.close();
} catch (std::ios::failure x) {
onerror = true;
}
if (onerror) {
PRINTB("ERROR: \"%s\" write error. (Disk full?)", name2display);
}
}
}
void export_stl(const PolySet &ps, std::ostream &output)
{
PolySet triangulated(3);
PolysetUtils::tessellate_faces(ps, triangulated);
setlocale(LC_NUMERIC, "C"); // Ensure radix is . (not ,) in output
output << "solid OpenSCAD_Model\n";
BOOST_FOREACH(const Polygon &p, triangulated.polygons) {
assert(p.size() == 3); // STL only allows triangles
std::stringstream stream;
stream << p[0][0] << " " << p[0][1] << " " << p[0][2];
std::string vs1 = stream.str();
stream.str("");
stream << p[1][0] << " " << p[1][1] << " " << p[1][2];
std::string vs2 = stream.str();
stream.str("");
stream << p[2][0] << " " << p[2][1] << " " << p[2][2];
std::string vs3 = stream.str();
if (vs1 != vs2 && vs1 != vs3 && vs2 != vs3) {
// The above condition ensures that there are 3 distinct vertices, but
// they may be collinear. If they are, the unit normal is meaningless
// so the default value of "1 0 0" can be used. If the vertices are not
// collinear then the unit normal must be calculated from the
// components.
output << " facet normal ";
Vector3d normal = (p[1] - p[0]).cross(p[2] - p[0]);
normal.normalize();
if (is_finite(normal) && !is_nan(normal)) {
output << normal[0] << " " << normal[1] << " " << normal[2] << "\n";
}
else {
output << "0 0 0\n";
}
output << " outer loop\n";
BOOST_FOREACH(const Vector3d &v, p) {
output << " vertex " << v[0] << " " << v[1] << " " << v[2] << "\n";
}
output << " endloop\n";
output << " endfacet\n";
}
}
output << "endsolid OpenSCAD_Model\n";
setlocale(LC_NUMERIC, ""); // Set default locale
}
/*!
Saves the given CGAL Polyhedon2 as STL to the given file.
The file must be open.
*/
static void export_stl(const CGAL_Polyhedron &P, std::ostream &output)
{
typedef CGAL_Polyhedron::Vertex Vertex;
typedef CGAL_Polyhedron::Vertex_const_iterator VCI;
typedef CGAL_Polyhedron::Facet_const_iterator FCI;
typedef CGAL_Polyhedron::Halfedge_around_facet_const_circulator HFCC;
setlocale(LC_NUMERIC, "C"); // Ensure radix is . (not ,) in output
output << "solid OpenSCAD_Model\n";
for (FCI fi = P.facets_begin(); fi != P.facets_end(); ++fi) {
HFCC hc = fi->facet_begin();
HFCC hc_end = hc;
Vertex v1, v2, v3;
v1 = *VCI((hc++)->vertex());
v3 = *VCI((hc++)->vertex());
do {
v2 = v3;
v3 = *VCI((hc++)->vertex());
double x1 = CGAL::to_double(v1.point().x());
double y1 = CGAL::to_double(v1.point().y());
double z1 = CGAL::to_double(v1.point().z());
double x2 = CGAL::to_double(v2.point().x());
double y2 = CGAL::to_double(v2.point().y());
double z2 = CGAL::to_double(v2.point().z());
double x3 = CGAL::to_double(v3.point().x());
double y3 = CGAL::to_double(v3.point().y());
double z3 = CGAL::to_double(v3.point().z());
std::stringstream stream;
stream << x1 << " " << y1 << " " << z1;
std::string vs1 = stream.str();
stream.str("");
stream << x2 << " " << y2 << " " << z2;
std::string vs2 = stream.str();
stream.str("");
stream << x3 << " " << y3 << " " << z3;
std::string vs3 = stream.str();
if (vs1 != vs2 && vs1 != vs3 && vs2 != vs3) {
// The above condition ensures that there are 3 distinct vertices, but
// they may be collinear. If they are, the unit normal is meaningless
// so the default value of "1 0 0" can be used. If the vertices are not
// collinear then the unit normal must be calculated from the
// components.
if (!CGAL::collinear(v1.point(),v2.point(),v3.point())) {
CGAL_Polyhedron::Traits::Vector_3 normal = CGAL::normal(v1.point(),v2.point(),v3.point());
output << " facet normal "
<< CGAL::sign(normal.x()) * sqrt(CGAL::to_double(normal.x()*normal.x()/normal.squared_length()))
<< " "
<< CGAL::sign(normal.y()) * sqrt(CGAL::to_double(normal.y()*normal.y()/normal.squared_length()))
<< " "
<< CGAL::sign(normal.z()) * sqrt(CGAL::to_double(normal.z()*normal.z()/normal.squared_length()))
<< "\n";
}
else output << " facet normal 1 0 0\n";
output << " outer loop\n";
output << " vertex " << vs1 << "\n";
output << " vertex " << vs2 << "\n";
output << " vertex " << vs3 << "\n";
output << " endloop\n";
output << " endfacet\n";
}
} while (hc != hc_end);
}
output << "endsolid OpenSCAD_Model\n";
setlocale(LC_NUMERIC, ""); // Set default locale
}
/*!
Saves the current 3D CGAL Nef polyhedron as STL to the given file.
The file must be open.
*/
void export_stl(const CGAL_Nef_polyhedron *root_N, std::ostream &output)
{
if (!root_N->p3->is_simple()) {
PRINT("WARNING: Exported object may not be a valid 2-manifold and may need repair");
}
bool usePolySet = true;
if (usePolySet) {
PolySet ps(3);
bool err = CGALUtils::createPolySetFromNefPolyhedron3(*(root_N->p3), ps);
if (err) { PRINT("ERROR: Nef->PolySet failed"); }
else {
export_stl(ps, output);
}
}
else {
CGAL::Failure_behaviour old_behaviour = CGAL::set_error_behaviour(CGAL::THROW_EXCEPTION);
try {
CGAL_Polyhedron P;
//root_N->p3->convert_to_Polyhedron(P);
bool err = nefworkaround::convert_to_Polyhedron<CGAL_Kernel3>( *(root_N->p3), P );
if (err) {
PRINT("ERROR: CGAL NefPolyhedron->Polyhedron conversion failed");
return;
}
export_stl(P, output);
}
catch (const CGAL::Assertion_exception &e) {
PRINTB("ERROR: CGAL error in CGAL_Nef_polyhedron3::convert_to_Polyhedron(): %s", e.what());
}
catch (...) {
PRINT("ERROR: CGAL unknown error in CGAL_Nef_polyhedron3::convert_to_Polyhedron()");
}
CGAL::set_error_behaviour(old_behaviour);
}
}
void export_off(const class PolySet &ps, std::ostream &output)
{
// FIXME: Implement this without creating a Nef polyhedron
CGAL_Nef_polyhedron *N = CGALUtils::createNefPolyhedronFromGeometry(ps);
export_off(N, output);
delete N;
}
void export_off(const CGAL_Nef_polyhedron *root_N, std::ostream &output)
{
if (!root_N->p3->is_simple()) {
PRINT("WARNING: Export failed, the object isn't a valid 2-manifold.");
return;
}
CGAL::Failure_behaviour old_behaviour = CGAL::set_error_behaviour(CGAL::THROW_EXCEPTION);
try {
CGAL_Polyhedron P;
//root_N->p3->convert_to_Polyhedron(P);
bool err = nefworkaround::convert_to_Polyhedron<CGAL_Kernel3>(*(root_N->p3), P);
if (err) {
PRINT("ERROR: CGAL NefPolyhedron->Polyhedron conversion failed");
return;
}
output << P;
}
catch (const CGAL::Assertion_exception &e) {
PRINTB("ERROR: CGAL error in CGAL_Nef_polyhedron3::convert_to_Polyhedron(): %s", e.what());
}
CGAL::set_error_behaviour(old_behaviour);
}
void export_amf(const class PolySet &ps, std::ostream &output)
{
// FIXME: Implement this without creating a Nef polyhedron
CGAL_Nef_polyhedron *N = CGALUtils::createNefPolyhedronFromGeometry(ps);
export_amf(N, output);
delete N;
}
/*!
Saves the current 3D CGAL Nef polyhedron as AMF to the given file.
The file must be open.
*/
void export_amf(const CGAL_Nef_polyhedron *root_N, std::ostream &output)
{
if (!root_N->p3->is_simple()) {
PRINT("WARNING: Export failed, the object isn't a valid 2-manifold.");
return;
}
CGAL::Failure_behaviour old_behaviour = CGAL::set_error_behaviour(CGAL::THROW_EXCEPTION);
try {
CGAL_Polyhedron P;
//root_N->p3->convert_to_Polyhedron(P);
bool err = nefworkaround::convert_to_Polyhedron<CGAL_Kernel3>(*(root_N->p3), P);
if (err) {
PRINT("ERROR: CGAL NefPolyhedron->Polyhedron conversion failed");
return;
}
typedef CGAL_Polyhedron::Vertex Vertex;
typedef CGAL_Polyhedron::Vertex_const_iterator VCI;
typedef CGAL_Polyhedron::Facet_const_iterator FCI;
typedef CGAL_Polyhedron::Halfedge_around_facet_const_circulator HFCC;
setlocale(LC_NUMERIC, "C"); // Ensure radix is . (not ,) in output
std::vector<std::string> vertices;
std::vector<triangle> triangles;
for (FCI fi = P.facets_begin(); fi != P.facets_end(); ++fi) {
HFCC hc = fi->facet_begin();
HFCC hc_end = hc;
Vertex v1, v2, v3;
v1 = *VCI((hc++)->vertex());
v3 = *VCI((hc++)->vertex());
do {
v2 = v3;
v3 = *VCI((hc++)->vertex());
double x1 = CGAL::to_double(v1.point().x());
double y1 = CGAL::to_double(v1.point().y());
double z1 = CGAL::to_double(v1.point().z());
double x2 = CGAL::to_double(v2.point().x());
double y2 = CGAL::to_double(v2.point().y());
double z2 = CGAL::to_double(v2.point().z());
double x3 = CGAL::to_double(v3.point().x());
double y3 = CGAL::to_double(v3.point().y());
double z3 = CGAL::to_double(v3.point().z());
std::stringstream stream;
stream << x1 << " " << y1 << " " << z1;
std::string vs1 = stream.str();
stream.str("");
stream << x2 << " " << y2 << " " << z2;
std::string vs2 = stream.str();
stream.str("");
stream << x3 << " " << y3 << " " << z3;
std::string vs3 = stream.str();
if (std::find(vertices.begin(), vertices.end(), vs1) == vertices.end())
vertices.push_back(vs1);
if (std::find(vertices.begin(), vertices.end(), vs2) == vertices.end())
vertices.push_back(vs2);
if (std::find(vertices.begin(), vertices.end(), vs3) == vertices.end())
vertices.push_back(vs3);
if (vs1 != vs2 && vs1 != vs3 && vs2 != vs3) {
// The above condition ensures that there are 3 distinct vertices, but
// they may be collinear. If they are, the unit normal is meaningless
// so the default value of "1 0 0" can be used. If the vertices are not
// collinear then the unit normal must be calculated from the
// components.
triangle tri = {vs1, vs2, vs3};
triangles.push_back(tri);
}
} while (hc != hc_end);
}
output << "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\r\n"
<< "<amf unit=\"millimeter\">\r\n"
<< " <metadata type=\"producer\">OpenSCAD " << QUOTED(OPENSCAD_VERSION)
#ifdef OPENSCAD_COMMIT
<< " (git " << QUOTED(OPENSCAD_COMMIT) << ")"
#endif
<< "</metadata>\r\n"
<< " <object id=\"0\">\r\n"
<< " <mesh>\r\n";
output << " <vertices>\r\n";
for (size_t i = 0; i < vertices.size(); i++) {
std::string s = vertices[i];
output << " <vertex><coordinates>\r\n";
char* chrs = new char[s.length() + 1];
strcpy(chrs, s.c_str());
std::string coords = strtok(chrs, " ");
output << " <x>" << coords << "</x>\r\n";
coords = strtok(NULL, " ");
output << " <y>" << coords << "</y>\r\n";
coords = strtok(NULL, " ");
output << " <z>" << coords << "</z>\r\n";
output << " </coordinates></vertex>\r\n";
delete[] chrs;
}
output << " </vertices>\r\n";
output << " <volume>\r\n";
for (size_t i = 0; i < triangles.size(); i++) {
triangle t = triangles[i];
output << " <triangle>\r\n";
size_t index;
index = std::distance(vertices.begin(), std::find(vertices.begin(), vertices.end(), t.vs1));
output << " <v1>" << index << "</v1>\r\n";
index = std::distance(vertices.begin(), std::find(vertices.begin(), vertices.end(), t.vs2));
output << " <v2>" << index << "</v2>\r\n";
index = std::distance(vertices.begin(), std::find(vertices.begin(), vertices.end(), t.vs3));
output << " <v3>" << index << "</v3>\r\n";
output << " </triangle>\r\n";
}
output << " </volume>\r\n";
output << " </mesh>\r\n"
<< " </object>\r\n"
<< "</amf>\r\n";
} catch (CGAL::Assertion_exception e) {
PRINTB("ERROR: CGAL error in CGAL_Nef_polyhedron3::convert_to_Polyhedron(): %s", e.what());
}
CGAL::set_error_behaviour(old_behaviour);
setlocale(LC_NUMERIC, ""); // Set default locale
}
#endif // ENABLE_CGAL
/*!
Saves the current Polygon2d as DXF to the given absolute filename.
*/
void export_dxf(const Polygon2d &poly, std::ostream &output)
{
setlocale(LC_NUMERIC, "C"); // Ensure radix is . (not ,) in output
// Some importers (e.g. Inkscape) needs a BLOCKS section to be present
output << " 0\n"
<< "SECTION\n"
<< " 2\n"
<< "BLOCKS\n"
<< " 0\n"
<< "ENDSEC\n"
<< " 0\n"
<< "SECTION\n"
<< " 2\n"
<< "ENTITIES\n";
BOOST_FOREACH(const Outline2d &o, poly.outlines()) {
for (unsigned int i=0;i<o.vertices.size();i++) {
const Vector2d &p1 = o.vertices[i];
const Vector2d &p2 = o.vertices[(i+1)%o.vertices.size()];
double x1 = p1[0];
double y1 = p1[1];
double x2 = p2[0];
double y2 = p2[1];
output << " 0\n"
<< "LINE\n";
// Some importers (e.g. Inkscape) needs a layer to be specified
output << " 8\n"
<< "0\n"
<< " 10\n"
<< x1 << "\n"
<< " 20\n"
<< y1 << "\n"
<< " 11\n"
<< x2 << "\n"
<< " 21\n"
<< y2 << "\n";
}
}
output << " 0\n"
<< "ENDSEC\n";
// Some importers (e.g. Inkscape) needs an OBJECTS section with a DICTIONARY entry
output << " 0\n"
<< "SECTION\n"
<< " 2\n"
<< "OBJECTS\n"
<< " 0\n"
<< "DICTIONARY\n"
<< " 0\n"
<< "ENDSEC\n";
output << " 0\n"
<<"EOF\n";
setlocale(LC_NUMERIC, ""); // Set default locale
}
void export_svg(const Polygon2d &poly, std::ostream &output)
{
setlocale(LC_NUMERIC, "C"); // Ensure radix is . (not ,) in output
BoundingBox bbox = poly.getBoundingBox();
int minx = floor(bbox.min().x());
int miny = floor(-bbox.max().y());
int maxx = ceil(bbox.max().x());
int maxy = ceil(-bbox.min().y());
int width = maxx - minx;
int height = maxy - miny;
output
<< "<?xml version=\"1.0\" standalone=\"no\"?>\n"
<< "<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 1.1//EN\" \"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd\">\n"
<< "<svg width=\"" << width << "\" height=\"" << height
<< "\" viewBox=\"" << minx << " " << miny << " " << width << " " << height
<< "\" xmlns=\"http://www.w3.org/2000/svg\" version=\"1.1\">\n"
<< "<title>OpenSCAD Model</title>\n";
output << "<path d=\"\n";
BOOST_FOREACH(const Outline2d &o, poly.outlines()) {
if (o.vertices.empty()) {
continue;
}
const Eigen::Vector2d& p0 = o.vertices[0];
output << "M " << p0.x() << "," << -p0.y();
for (unsigned int idx = 1;idx < o.vertices.size();idx++) {
const Eigen::Vector2d& p = o.vertices[idx];
output << " L " << p.x() << "," << -p.y();
if ((idx % 6) == 5) {
output << "\n";
}
}
output << " z\n";
}
output << "\" stroke=\"black\" fill=\"lightgray\" stroke-width=\"0.5\"/>";
output << "</svg>\n";
setlocale(LC_NUMERIC, ""); // Set default locale
}
Reference in New Issue View Git Blame Copy Permalink