ceph/src/boost/libs/numeric/odeint/include/boost/numeric/odeint/iterator/integrate/detail/integrate_adaptive.hpp

   1 /*
   2  [auto_generated]
   3  boost/numeric/odeint/integrate/detail/integrate_adaptive.hpp
   4
   5  [begin_description]
   6  Default Integrate adaptive implementation.
   7  [end_description]
   8
   9  Copyright 2009-2011 Karsten Ahnert
  10  Copyright 2009-2011 Mario Mulansky
  11
  12  Distributed under the Boost Software License, Version 1.0.
  13  (See accompanying file LICENSE_1_0.txt or
  14  copy at http://www.boost.org/LICENSE_1_0.txt)
  15  */
  16
  17
  18 #ifndef BOOST_NUMERIC_ODEINT_INTEGRATE_DETAIL_INTEGRATE_ADAPTIVE_HPP_INCLUDED
  19 #define BOOST_NUMERIC_ODEINT_INTEGRATE_DETAIL_INTEGRATE_ADAPTIVE_HPP_INCLUDED
  20
  21 #include <stdexcept>
  22
  23 #include <boost/numeric/odeint/stepper/stepper_categories.hpp>
  24 #include <boost/numeric/odeint/stepper/controlled_step_result.hpp>
  25 #include <boost/numeric/odeint/iterator/integrate/detail/integrate_const.hpp>
  26 #include <boost/numeric/odeint/iterator/adaptive_time_iterator.hpp>
  27 #include <boost/numeric/odeint/iterator/integrate/detail/functors.hpp>
  28 #include <boost/numeric/odeint/util/bind.hpp>
  29 #include <boost/numeric/odeint/util/unwrap_reference.hpp>
  30 #include <boost/numeric/odeint/util/copy.hpp>
  31
  32 #include <boost/numeric/odeint/util/detail/less_with_sign.hpp>
  33
  34 namespace boost {
  35 namespace numeric {
  36 namespace odeint {
  37 namespace detail {
  38
  39 // forward declaration
  40 template< class Stepper , class System , class State , class Time , class Observer>
  41 size_t integrate_const(
  42         Stepper stepper , System system , State &start_state ,
  43         Time start_time , Time end_time , Time dt ,
  44         Observer observer , stepper_tag );
  45
  46 /*
  47  * integrate_adaptive for simple stepper is basically an integrate_const + some last step
  48  */
  49 template< class Stepper , class System , class State , class Time , class Observer >
  50 size_t integrate_adaptive(
  51         Stepper stepper , System system , State &start_state ,
  52         Time start_time , Time end_time , Time dt ,
  53         Observer observer , stepper_tag
  54 )
  55 {
  56     size_t steps = detail::integrate_const( stepper , system , start_state , start_time ,
  57                                             end_time , dt , observer , stepper_tag() );
  58     typename odeint::unwrap_reference< Observer >::type &obs = observer;
  59     typename odeint::unwrap_reference< Stepper >::type &st = stepper;
  60
  61     Time end = start_time + dt*steps;
  62     if( less_with_sign( end , end_time , dt ) )
  63     {   //make a last step to end exactly at end_time
  64         st.do_step( system , start_state , end , end_time - end );
  65         steps++;
  66         obs( start_state , end_time );
  67     }
  68     return steps;
  69 }
  70
  71
  72 /*
  73  * classical integrate adaptive
  74  */
  75 template< class Stepper , class System , class State , class Time , class Observer >
  76 size_t integrate_adaptive(
  77         Stepper stepper , System system , State &start_state ,
  78         Time &start_time , Time end_time , Time &dt ,
  79         Observer observer , controlled_stepper_tag
  80 )
  81 {
  82     size_t obs_calls = 0;
  83
  84     boost::for_each( make_adaptive_time_range( stepper , system , start_state ,
  85                                                start_time , end_time , dt ) ,
  86                      obs_caller< Observer >( obs_calls , observer ) );
  87
  88     return obs_calls-1;
  89 }
  90
  91
  92 /*
  93  * integrate adaptive for dense output steppers
  94  *
  95  * step size control is used if the stepper supports it
  96  */
  97 template< class Stepper , class System , class State , class Time , class Observer >
  98 size_t integrate_adaptive(
  99         Stepper stepper , System system , State &start_state ,
 100         Time start_time , Time end_time , Time dt ,
 101         Observer observer , dense_output_stepper_tag )
 102 {
 103     size_t obs_calls = 0;
 104
 105     boost::for_each( make_adaptive_time_range( stepper , system , start_state ,
 106                                                start_time , end_time , dt ) ,
 107                      obs_caller< Observer >( obs_calls , observer ) );
 108
 109     return obs_calls-1;
 110 }
 111
 112
 113
 114
 115 } // namespace detail
 116 } // namespace odeint
 117 } // namespace numeric
 118 } // namespace boost
 119
 120
 121 #endif // BOOST_NUMERIC_ODEINT_INTEGRATE_DETAIL_INTEGRATE_ADAPTIVE_HPP_INCLUDED