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diff --git a/include/2geom/path-intersection.h b/include/2geom/path-intersection.h
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+/**
+ * \file
+ * \brief Path intersection
+ *//*
+ * Authors:
+ *      ? <?@?.?>
+ * 
+ * Copyright ?-?  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 LIB2GEOM_SEEN_PATH_INTERSECTION_H
+#define LIB2GEOM_SEEN_PATH_INTERSECTION_H
+
+#include <2geom/crossing.h>
+#include <2geom/path.h>
+#include <2geom/sweep-bounds.h>
+
+namespace Geom {
+
+int winding(Path const &path, Point const &p);
+bool path_direction(Path const &p);
+
+inline bool contains(Path const & p, Point const &i, bool evenodd = true) {
+    return (evenodd ? winding(p, i) % 2 : winding(p, i)) != 0;
+}
+
+template<typename T>
+Crossings curve_sweep(Path const &a, Path const &b) {
+    T t;
+    Crossings ret;
+    std::vector<Rect> bounds_a = bounds(a), bounds_b = bounds(b);
+    std::vector<std::vector<unsigned> > ixs = sweep_bounds(bounds_a, bounds_b);
+    for(unsigned i = 0; i < a.size(); i++) {
+        for(std::vector<unsigned>::iterator jp = ixs[i].begin(); jp != ixs[i].end(); ++jp) {
+            Crossings cc = t.crossings(a[i], b[*jp]);
+            offset_crossings(cc, i, *jp);
+            ret.insert(ret.end(), cc.begin(), cc.end());
+        }
+    }
+    return ret;
+}
+
+Crossings pair_intersect(Curve const & A, Interval const &Ad,
+                    Curve const & B, Interval const &Bd);
+Crossings mono_intersect(Curve const & A, Interval const &Ad,
+                    Curve const & B, Interval const &Bd);
+                    
+struct SimpleCrosser : public Crosser<Path> {
+    Crossings crossings(Curve const &a, Curve const &b);
+    Crossings crossings(Path const &a, Path const &b) override { return curve_sweep<SimpleCrosser>(a, b); }
+    CrossingSet crossings(PathVector const &a, PathVector const &b) override { return Crosser<Path>::crossings(a, b); }
+};
+
+struct MonoCrosser : public Crosser<Path> {
+    Crossings crossings(Path const &a, Path const &b) override { return crossings(PathVector(a), PathVector(b))[0]; }
+    CrossingSet crossings(PathVector const &a, PathVector const &b) override;
+};
+
+typedef SimpleCrosser DefaultCrosser;
+
+std::vector<double> path_mono_splits(Path const &p);
+
+CrossingSet crossings_among(PathVector const & p);
+Crossings self_crossings(Path const & a);
+
+inline Crossings crossings(Curve const & a, Curve const & b) {
+    DefaultCrosser c = DefaultCrosser();
+    return c.crossings(a, b);
+}
+
+inline Crossings crossings(Path const & a, Path const & b) {
+    DefaultCrosser c = DefaultCrosser();
+    return c.crossings(a, b);
+}
+
+inline CrossingSet crossings(PathVector const & a, PathVector const & b) {
+    DefaultCrosser c = DefaultCrosser();
+    return c.crossings(a, b);
+}
+
+}
+
+#endif
+
+/*
+  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 :