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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.h"
#ifdef ENABLE_CGAL
DxfData::DxfData(const struct CGAL_Nef_polyhedron &N)
{
assert(N.dim == 2);
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 = N.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) = points.size();
points.append(Point(x, y));
}
if (first_point < 0) {
paths.append(Path());
first_point = this_point;
}
if (this_point != last_point) {
paths.last().points.append(&points[this_point]);
last_point = this_point;
}
}
}
if (first_point >= 0) {
paths.last().is_closed = 1;
paths.last().points.append(&points[first_point]);
}
}
fixup_path_direction();
}
#endif // ENABLE_CGAL
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