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/*
* OpenSCAD (www.openscad.at)
* Copyright (C) 2009 Clifford Wolf <clifford@clifford.at>
*
* 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 "printutils.h"
#include "polyset.h"
#include "dxfdata.h"
#include <QApplication>
#include <QProgressDialog>
#include <QTextStream>
#include <errno.h>
#ifdef ENABLE_CGAL
#include "cgal.h"
void cgal_nef3_to_polyset(PolySet *ps, CGAL_Nef_polyhedron *root_N)
{
CGAL_Polyhedron P;
root_N->p3.convert_to_Polyhedron(P);
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;
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());
ps->append_poly();
ps->append_vertex(x1, y1, z1);
ps->append_vertex(x2, y2, z2);
ps->append_vertex(x3, y3, z3);
} while (hc != hc_end);
}
}
/*!
Saves the current 3D CGAL Nef polyhedron as STL to the given file.
The file must be open.
*/
void export_stl(CGAL_Nef_polyhedron *root_N, QTextStream &output, QProgressDialog *pd)
{
CGAL_Polyhedron P;
root_N->p3.convert_to_Polyhedron(P);
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";
int facet_count = 0;
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());
QString vs1, vs2, vs3;
vs1.sprintf("%f %f %f", x1, y1, z1);
vs2.sprintf("%f %f %f", x2, y2, z2);
vs3.sprintf("%f %f %f", x3, y3, z3);
if (vs1 != vs2 && vs1 != vs3 && vs2 != vs3) {
double nx = (y1-y2)*(z1-z3) - (z1-z2)*(y1-y3);
double ny = (z1-z2)*(x1-x3) - (x1-x2)*(z1-z3);
double nz = (x1-x2)*(y1-y3) - (y1-y2)*(x1-x3);
double nlength = sqrt(nx*nx + ny*ny + nz*nz);
// Avoid generating normals for polygons with zero area
double eps = 0.000001;
if (nlength < eps) nlength = 1.0;
output << " facet normal "
<< nx / nlength << " "
<< ny / nlength << " "
<< nz / nlength << "\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);
if (pd) {
pd->setValue(facet_count++);
QApplication::processEvents();
}
}
output << "endsolid OpenSCAD_Model\n";
setlocale(LC_NUMERIC, ""); // Set default locale
}
void export_off(CGAL_Nef_polyhedron*, QTextStream&, QProgressDialog*)
{
PRINTF("WARNING: OFF import is not implemented yet.");
}
/*!
Saves the current 2D CGAL Nef polyhedron as DXF to the given absolute filename.
*/
void export_dxf(CGAL_Nef_polyhedron *root_N, QTextStream &output, QProgressDialog *)
{
setlocale(LC_NUMERIC, "C"); // Ensure radix is . (not ,) in output
// Some importers (e.g. QCAD) needs a HEADER section specifying AutoCAD 2000 as
// the file format for LWPOLYLINE entities to work
output << " 0\n"
<< "SECTION\n"
<< " 2\n"
<< "HEADER\n"
<< " 9\n"
<< "$ACADVER\n"
<< " 1\n"
<< "AC1015\n"
<< " 0\n"
<< "ENDSEC\n";
// 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";
DxfData dd(*root_N);
for (int i=0; i<dd.paths.size(); i++)
{
if (dd.paths[i].points.size() < 2) {
// not a valid polygon
continue;
}
// Use the LWPOLYLINE class - this makes it easier to handle complete
// objects (as paths) in Inkscape.
output << " 0\n"
<< "LWPOLYLINE\n"
<< " 8\n" // Some importers (e.g. Inkscape) need a layer to be specified
<< "0\n"
<< " 90\n" // number of vertices
<< dd.paths[i].points.size() << "\n"
<< " 70\n" // polygon flag (closed, ...)
<< (dd.paths[i].is_closed ? 1 : 0) << "\n";
// add all points
for (int j=0; j<dd.paths[i].points.size(); j++) {
DxfData::Point *p = dd.paths[i].points[j];
output <<" 10\n"
<< p->x << "\n"
<< " 20\n"
<< p->y << "\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
}
#endif
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