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diff --git a/src/3rdparty/2geom/include/2geom/orphan-code/intersection-by-smashing.h b/src/3rdparty/2geom/include/2geom/orphan-code/intersection-by-smashing.h
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+/*
+ * Diffeomorphism-based intersector: given two curves
+ *  M(t)=(x(t),y(t)) and N(u)=(X(u),Y(u))
+ * and supposing M is a graph over the x-axis, we compute y(x) and the
+ * transformation:
+ *  X <- X
+ *  Y <- Y - y(X)
+ * smashes M on the x axis. The intersections are then given by the roots of:
+ *  Y(u) - y(X(u)) = 0
+ *//*
+ * Authors:
+ * 		J.-F. Barraud    <jfbarraud at gmail.com>
+ * Copyright 2010  authors
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it either under the terms of the GNU Lesser General Public
+ * License version 2.1 as published by the Free Software Foundation
+ * (the "LGPL") or, at your option, under the terms of the Mozilla
+ * Public License Version 1.1 (the "MPL"). If you do not alter this
+ * notice, a recipient may use your version of this file under either
+ * the MPL or the LGPL.
+ *
+ * You should have received a copy of the LGPL along with this library
+ * in the file COPYING-LGPL-2.1; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * You should have received a copy of the MPL along with this library
+ * in the file COPYING-MPL-1.1
+ *
+ * The contents of this file are subject to the Mozilla Public License
+ * Version 1.1 (the "License"); you may not use this file except in
+ * compliance with the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
+ * OF ANY KIND, either express or implied. See the LGPL or the MPL for
+ * the specific language governing rights and limitations.
+ */
+
+#ifndef SEEN_LIB2GEOM_INTERSECTION_BY_SMASHING_H
+#define SEEN_LIB2GEOM_INTERSECTION_BY_SMASHING_H
+
+#include <2geom/d2.h>
+#include <2geom/interval.h>
+#include <2geom/sbasis.h>
+#include <2geom/sbasis-geometric.h>
+#include <cstdlib>
+#include <vector>
+#include <algorithm>
+
+
+namespace Geom{
+
+struct SmashIntersection {
+	Rect times;
+	Rect bbox;
+};
+
+std::vector<SmashIntersection> smash_intersect( D2<SBasis> const &a, D2<SBasis> const &b, double tol);
+std::vector<SmashIntersection> monotonic_smash_intersect( D2<SBasis> const &a, D2<SBasis> const &b, double tol);
+//std::vector<Intersection> monotonic_smash_intersect( Curve const &a, double a_from, double a_to,
+//			                                         Curve const &b, double b_from, double b_to, double tol);
+
+std::vector<Interval> monotonicSplit(D2<SBasis> const &p);
+
+} // end namespace Geom
+
+#endif // !SEEN_LIB2GEOM_INTERSECTION_BY_SMASHING_H
+
+/*
+  Local Variables:
+  mode:c++
+  c-file-style:"stroustrup"
+  c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
+  indent-tabs-mode:nil
+  fill-column:99
+  End:
+*/
+// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :