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+/*
+ * Routines for generating anything randomly
+ *
+ * Authors:
+ * Marco Cecchetti <mrcekets at gmail.com>
+ *
+ * Copyright 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 _GEOM_SL_PICK_H_
+#define _GEOM_SL_PICK_H_
+
+
+#include <2geom/symbolic/multipoly.h>
+#include <2geom/symbolic/matrix.h>
+
+inline
+size_t pick_uint(size_t max)
+{
+ return (std::rand() % (max+1));
+}
+
+inline
+int pick_int(size_t max)
+{
+ int s = pick_uint(2);
+ if (s == 0) s = -1;
+ return s * (std::rand() % (max+1));
+}
+
+inline
+Geom::SL::multi_index_type pick_multi_index(size_t N, size_t max)
+{
+ Geom::SL::multi_index_type I(N);
+ for (size_t i = 0; i < I.size(); ++i)
+ I[i] = pick_uint(max);
+ return I;
+}
+
+template <size_t N>
+inline
+typename Geom::SL::mvpoly<N, double>::type
+pick_polyN(size_t d, size_t m)
+{
+ typename Geom::SL::mvpoly<N, double>::type p;
+ size_t d0 = pick_uint(d);
+ for (size_t i = 0; i <= d0; ++i)
+ {
+ p.coefficient(i, pick_polyN<N-1>(d, m));
+ }
+ return p;
+}
+
+template <>
+inline
+double pick_polyN<0>(size_t /*d*/, size_t m)
+{
+ return pick_int(m);
+}
+
+
+template <size_t N>
+inline
+typename Geom::SL::mvpoly<N, double>::type
+pick_poly_max(size_t d, size_t m)
+{
+ typename Geom::SL::mvpoly<N, double>::type p;
+ for (size_t i = 0; i <= d; ++i)
+ {
+ p.coefficient(i, pick_poly_max<N-1>(d-i, m));
+ }
+ return p;
+}
+
+template <>
+inline
+double pick_poly_max<0>(size_t /*d*/, size_t m)
+{
+ return pick_int(m);
+}
+
+
+template <size_t N>
+inline
+Geom::SL::MultiPoly<N, double>
+pick_multipoly(size_t d, size_t m)
+{
+ return Geom::SL::MultiPoly<N, double>(pick_polyN<N>(d, m));
+}
+
+template <size_t N>
+inline
+Geom::SL::MultiPoly<N, double>
+pick_multipoly_max(size_t d, size_t m)
+{
+ return Geom::SL::MultiPoly<N, double>(pick_poly_max<N>(d, m));
+}
+
+
+
+inline
+Geom::SL::Matrix< Geom::SL::MultiPoly<2, double> >
+pick_matrix(size_t n, size_t d, size_t m)
+{
+ Geom::SL::Matrix< Geom::SL::MultiPoly<2, double> > M(n, n);
+ for (size_t i = 0; i < n; ++i)
+ {
+ for (size_t j = 0; j < n; ++j)
+ {
+ M(i,j) = pick_multipoly_max<2>(d, m);
+ }
+ }
+ return M;
+}
+
+
+inline
+Geom::SL::Matrix< Geom::SL::MultiPoly<2, double> >
+pick_symmetric_matrix(size_t n, size_t d, size_t m)
+{
+ Geom::SL::Matrix< Geom::SL::MultiPoly<2, double> > M(n, n);
+ for (size_t i = 0; i < n; ++i)
+ {
+ for (size_t j = 0; j < i; ++j)
+ {
+ M(i,j) = M(j,i) = pick_multipoly_max<2>(d, m);
+ }
+ }
+ for (size_t i = 0; i < n; ++i)
+ {
+ M(i,i) = pick_multipoly_max<2>(d, m);
+ }
+ return M;
+}
+
+
+#endif // _GEOM_SL_PICK_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 :