ExampleSparseArray2D.cpp

Example for a sparse array 2D

Author

MIP

/* 
This file is part of the BIAS library (Basic ImageAlgorithmS).

Copyright (C) 2003-2009    (see file CONTACT for details)
  Multimediale Systeme der Informationsverarbeitung
  Institut fuer Informatik
  Christian-Albrechts-Universitaet Kiel


BIAS is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.

BIAS 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 Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License
along with BIAS; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/

/**
   @example ExampleSparseArray2D.cpp
   @relates SparseArray2D
   @brief Example for a sparse array 2D
   @ingroup g_examples
   @author MIP   
*/

#include <iostream>
#include <Base/Common/SparseArray2D.hh>

using namespace BIAS;
using namespace std;

/** \cond POORLY_NAMED_EXAMPLE_CLASSES **/
/* foo */
class foo 
{
public:
  void set(const double d) { data=d; }
  double get() const { return data; }
protected:
  double data;
};

ostream &operator<<(ostream& os, const foo& f)
{
  os << f.get();
  return os;
}

void print(const SparseArray2D<foo> &a)
{
  cout << a << endl;
}
/** \endcond */

int main()
{
  SparseArray2D<foo> array;
  cout << "empty SparseArray2D: ";
  print(array);
  cout << "empty() = "<<boolalpha<<array.empty()<<endl;

  array.resize(2,2);
  cout << "empty Array2D of size 2x2 : ";
  print(array);

  foo f;
  f.set(2.0);
  array(0,1) = f;
  cout << "filled Array2D of size 2x2 : ";
  print(array);
  

  array.resize(3,3);
  array(2,2) = f;
  cout << "partially filled Array2D of size 3x3 : ";
  print(array);

  cout << "indices (4,0) are valid: "<<boolalpha<<array.is_valid(4,0)<<endl;
  cout << "indices (2,2) are valid: "<<boolalpha<<array.is_valid(2,2)<<endl;
  cout << "indices (2,1) are valid: "<<boolalpha<<array.is_valid(2,1)<<endl;

  SparseArray2D<foo>::iterator it;
  int i=0;
  for (it = array.begin(); it!=array.end(); it++, i++){
    it->set((double)i);
  }
  cout << "partially filled Array2D of size 3x3 : ";
  print(array);
  
  unsigned c, r;
  for (r=0; r<3; r++){
    for (c=0; c<3; c++){
      array(r,c).set(r*3+c);
    }
  }
  cout << "filled Array2D of size 3x3 : ";
  print(array);

  cout << "array[1][1] = "<<array(1,1).get()<<endl;

  // should throw
  //cout << array(3,3).get()<<endl;

  return 0;
}