/usr/include/wfmath-1.0/wfmath/miniball.h is in libwfmath-1.0-dev 1.0.2+dfsg1-4.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 | // Copright (C) 1999
// $Revision$
// $Date$
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA,
// or download the License terms from prep.ai.mit.edu/pub/gnu/COPYING-2.0.
//
// Contact:
// --------
// Bernd Gaertner
// Institut f. Informatik
// ETH Zuerich
// ETH-Zentrum
// CH-8092 Zuerich, Switzerland
// http://www.inf.ethz.ch/personal/gaertner
//
// 2001-1-9: included in WFMath backend. Namespace wrapping added
// and filename changed to follow WFMath conventions, but otherwise
// unchanged.
#ifndef WFMATH_MINIBALL_H
#define WFMATH_MINIBALL_H
#include <list>
#include <wfmath/wrapped_array.h>
namespace WFMath { namespace _miniball {
template <int d> class Miniball;
template <int d> class Basis;
// Miniball
// --------
template <int d>
class Miniball {
public:
// types
typedef Wrapped_array<d> Point;
typedef typename std::list<Point>::iterator It;
typedef typename std::list<Point>::const_iterator Cit;
private:
// data members
std::list<Point> L; // STL list keeping the points
Basis<d> B; // basis keeping the current ball
It support_end; // past-the-end iterator of support set
// private methods
void mtf_mb (It k);
void pivot_mb (It k);
void move_to_front (It j);
double max_excess (It t, It i, It& pivot) const;
double abs (double r) const {return (r>0)? r: (-r);}
double sqr (double r) const {return r*r;}
public:
// construction
Miniball() : L(), B(), support_end() {}
void check_in (const Point& p);
void build (bool pivoting = true);
// access
Point center() const;
double squared_radius () const;
int nr_points () const;
Cit points_begin () const;
Cit points_end () const;
int nr_support_points () const;
Cit support_points_begin () const;
Cit support_points_end () const;
// checking
double accuracy (double& slack) const;
bool is_valid (double tolerance = 1e-15) const;
};
// Basis
// -----
template <int d>
class Basis {
private:
// types
typedef Wrapped_array<d> Point;
// data members
int m, s; // size and number of support points
double q0[d];
double z[d+1];
double f[d+1];
double v[d+1][d];
double a[d+1][d];
double c[d+1][d];
double sqr_r[d+1];
double* current_c; // points to some c[j]
double current_sqr_r;
double sqr (double r) const {return r*r;}
public:
Basis();
// access
const double* center() const;
double squared_radius() const;
int size() const;
int support_size() const;
double excess (const Point& p) const;
// modification
void reset(); // generates empty sphere with m=s=0
bool push (const Point& p);
void pop ();
// checking
double slack() const;
};
}} // namespace WFMath::_miniball
#endif // WFMATH_MINIBALL_H
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