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/*
* 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 "dxfdata.h"
#include "grid.h"
#include "CGAL_Nef_polyhedron.h"
#include "cgal.h"
#include "cgalutils.h"
#include <boost/variant.hpp>
#include "polyset.h"
#include "dxftess.h"
#include "CGALEvaluator.h"
#include "Tree.h"
#ifdef ENABLE_CGAL
DxfData *CGAL_Nef_polyhedron::convertToDxfData() const
{
assert(this->dim == 2);
DxfData *dxfdata = new DxfData();
Grid2d<int> grid(GRID_COARSE);
typedef CGAL_Nef_polyhedron2::Explorer Explorer;
typedef Explorer::Face_const_iterator fci_t;
typedef Explorer::Halfedge_around_face_const_circulator heafcc_t;
Explorer E = this->p2->explorer();
for (fci_t fit = E.faces_begin(), facesend = E.faces_end(); fit != facesend; ++fit)
{
heafcc_t fcirc(E.halfedge(fit)), fend(fcirc);
int first_point = -1, last_point = -1;
CGAL_For_all(fcirc, fend) {
if (E.is_standard(E.target(fcirc))) {
Explorer::Point ep = E.point(E.target(fcirc));
double x = to_double(ep.x()), y = to_double(ep.y());
int this_point = -1;
if (grid.has(x, y)) {
this_point = grid.align(x, y);
} else {
this_point = grid.align(x, y) = dxfdata->points.size();
dxfdata->points.push_back(Vector2d(x, y));
}
if (first_point < 0) {
dxfdata->paths.push_back(DxfData::Path());
first_point = this_point;
}
if (this_point != last_point) {
dxfdata->paths.back().indices.push_back(this_point);
last_point = this_point;
}
}
}
if (first_point >= 0) {
dxfdata->paths.back().is_closed = 1;
dxfdata->paths.back().indices.push_back(first_point);
}
}
dxfdata->fixup_path_direction();
return dxfdata;
}
std::string CGAL_Nef_polyhedron::dump() const
{
if (this->dim==2)
return OpenSCAD::dump_svg( *this->p2 );
else if (this->dim==3)
return OpenSCAD::dump_svg( *this->p3 );
else
return std::string("Nef Polyhedron with dimension != 2 or 3");
}
void CGAL_Nef_polyhedron::transform( const Transform3d &matrix )
{
if (!this->isNull()) {
if (this->dim == 2) {
// Unfortunately CGAL provides no transform method for CGAL_Nef_polyhedron2
// objects. So we convert in to our internal 2d data format, transform it,
// tesselate it and create a new CGAL_Nef_polyhedron2 from it.. What a hack!
Eigen::Matrix2f testmat;
testmat << matrix(0,0), matrix(0,1), matrix(1,0), matrix(1,1);
if (testmat.determinant() == 0) {
PRINT("Warning: Scaling a 2D object with 0 - removing object");
this->reset();
return;
}
else {
CGAL_Aff_transformation2 t(
matrix(0,0), matrix(0,1), matrix(0,3),
matrix(1,0), matrix(1,1), matrix(1,3), matrix(3,3));
DxfData *dd = this->convertToDxfData();
for (size_t i=0; i < dd->points.size(); i++) {
CGAL_Kernel2::Point_2 p = CGAL_Kernel2::Point_2(dd->points[i][0], dd->points[i][1]);
p = t.transform(p);
dd->points[i][0] = to_double(p.x());
dd->points[i][1] = to_double(p.y());
}
PolySet ps;
ps.is2d = true;
dxf_tesselate(&ps, *dd, 0, Vector2d(1,1), true, false, 0);
Tree nulltree;
CGALEvaluator tmpeval(nulltree);
CGAL_Nef_polyhedron N = tmpeval.evaluateCGALMesh(ps);
if ( N.p2 ) this->p2.reset( new CGAL_Nef_polyhedron2( *N.p2 ) );
delete dd;
}
}
else if (this->dim == 3) {
if (matrix.matrix().determinant() == 0) {
PRINT("Warning: Scaling a 3D object with 0 - removing object");
this->reset();
}
else {
CGAL_Aff_transformation t(
matrix(0,0), matrix(0,1), matrix(0,2), matrix(0,3),
matrix(1,0), matrix(1,1), matrix(1,2), matrix(1,3),
matrix(2,0), matrix(2,1), matrix(2,2), matrix(2,3), matrix(3,3));
this->p3->transform(t);
}
}
}
}
#endif // ENABLE_CGAL
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