Refactoring of CGAL functionality to allow for forward-declaration of CGAL classes in header files, reducing coupling and thus compilation times

1 files changed, 80 insertions, 0 deletions

diff --git a/src/CGAL_Nef_polyhedron_DxfData.cc b/src/CGAL_Nef_polyhedron_DxfData.cc
new file mode 100644
index 0000000..4bfb205
--- /dev/null
+++ b/src/CGAL_Nef_polyhedron_DxfData.cc
@@ -0,0 +1,80 @@
+/*
+ *  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"
+
+#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.append(Vector2d(x, y));
+				}
+				if (first_point < 0) {
+					dxfdata->paths.append(DxfData::Path());
+					first_point = this_point;
+				}
+				if (this_point != last_point) {
+					dxfdata->paths.last().points.append(&dxfdata->points[this_point]);
+					last_point = this_point;
+				}
+			}
+		}
+		if (first_point >= 0) {
+			dxfdata->paths.last().is_closed = 1;
+			dxfdata->paths.last().points.append(&dxfdata->points[first_point]);
+		}
+	}
+
+	dxfdata->fixup_path_direction();
+	return dxfdata;
+}
+
+#endif // ENABLE_CGAL