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+/** @file
+ * @brief Nearest time routines for D2<SBasis> and Piecewise<D2<SBasis>>
+ *//*
+ * Authors:
+ * Marco Cecchetti <mrcekets at gmail.com>
+ *
+ * Copyright 2007-2008 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_NEAREST_TIME_H
+#define LIB2GEOM_SEEN_NEAREST_TIME_H
+
+
+#include <vector>
+
+#include <2geom/d2.h>
+#include <2geom/piecewise.h>
+#include <2geom/exception.h>
+#include <2geom/bezier.h>
+
+
+namespace Geom
+{
+
+/*
+ * Given a line L specified by a point A and direction vector v,
+ * return the point on L nearest to p. Note that the returned value
+ * is with respect to the _normalized_ direction of v!
+ */
+inline double nearest_time(Point const &p, Point const &A, Point const &v)
+{
+ Point d(p - A);
+ return d[0] * v[0] + d[1] * v[1];
+}
+
+Coord nearest_time(Point const &p, D2<Bezier> const &bez, Coord from = 0, Coord to = 1);
+
+////////////////////////////////////////////////////////////////////////////////
+// D2<SBasis> versions
+
+/*
+ * Return the parameter t of a nearest point on the portion of the curve "c",
+ * related to the interval [from, to], to the point "p".
+ * The needed curve derivative "deriv" is passed as parameter.
+ * The function return the first nearest point to "p" that is found.
+ */
+double nearest_time(Point const &p,
+ D2<SBasis> const &c, D2<SBasis> const &deriv,
+ double from = 0, double to = 1);
+
+inline
+double nearest_time(Point const &p,
+ D2<SBasis> const &c,
+ double from = 0, double to = 1 )
+{
+ return nearest_time(p, c, Geom::derivative(c), from, to);
+}
+
+/*
+ * Return the parameters t of all the nearest times on the portion of
+ * the curve "c", related to the interval [from, to], to the point "p".
+ * The needed curve derivative "dc" is passed as parameter.
+ */
+std::vector<double>
+all_nearest_times(Point const& p,
+ D2<SBasis> const& c, D2<SBasis> const& dc,
+ double from = 0, double to = 1 );
+
+inline
+std::vector<double>
+all_nearest_times(Point const &p,
+ D2<SBasis> const &c,
+ double from = 0, double to = 1)
+{
+ return all_nearest_times(p, c, Geom::derivative(c), from, to);
+}
+
+
+////////////////////////////////////////////////////////////////////////////////
+// Piecewise< D2<SBasis> > versions
+
+double nearest_time(Point const &p,
+ Piecewise< D2<SBasis> > const &c,
+ double from, double to);
+
+inline
+double nearest_time(Point const& p, Piecewise< D2<SBasis> > const &c)
+{
+ return nearest_time(p, c, c.cuts[0], c.cuts[c.size()]);
+}
+
+
+std::vector<double>
+all_nearest_times(Point const &p,
+ Piecewise< D2<SBasis> > const &c,
+ double from, double to);
+
+inline
+std::vector<double>
+all_nearest_times( Point const& p, Piecewise< D2<SBasis> > const& c )
+{
+ return all_nearest_times(p, c, c.cuts[0], c.cuts[c.size()]);
+}
+
+} // end namespace Geom
+
+#endif // LIB2GEOM_SEEN_NEAREST_TIME_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 :