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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 :
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