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

   1 /*
   2  [auto_generated]
   3  boost/numeric/odeint/integrate/integrate_const.hpp
   4
   5  [begin_description]
   6  Constant integration of ODEs, meaning that the state of the ODE is observed on constant time intervals.
   7  The routines makes full use of adaptive and dense-output methods.
   8  [end_description]
   9
  10  Copyright 2009-2011 Karsten Ahnert
  11  Copyright 2009-2011 Mario Mulansky
  12
  13  Distributed under the Boost Software License, Version 1.0.
  14  (See accompanying file LICENSE_1_0.txt or
  15  copy at http://www.boost.org/LICENSE_1_0.txt)
  16  */
  17
  18
  19 #ifndef BOOST_NUMERIC_ODEINT_INTEGRATE_INTEGRATE_CONST_HPP_INCLUDED
  20 #define BOOST_NUMERIC_ODEINT_INTEGRATE_INTEGRATE_CONST_HPP_INCLUDED
  21
  22 #include <boost/type_traits/is_same.hpp>
  23
  24 #include <boost/numeric/odeint/stepper/stepper_categories.hpp>
  25 #include <boost/numeric/odeint/iterator/integrate/null_observer.hpp>
  26 #include <boost/numeric/odeint/iterator/integrate/detail/integrate_const.hpp>
  27 #include <boost/numeric/odeint/iterator/integrate/detail/integrate_adaptive.hpp>
  28
  29 namespace boost {
  30 namespace numeric {
  31 namespace odeint {
  32
  33
  34
  35
  36
  37 /*
  38  * Integrates with constant time step dt.
  39  */
  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
  45 )
  46 {
  47     typedef typename odeint::unwrap_reference< Stepper >::type::stepper_category stepper_category;
  48     // we want to get as fast as possible to the end
  49     if( boost::is_same< null_observer , Observer >::value )
  50     {
  51         return detail::integrate_adaptive(
  52                 stepper , system , start_state ,
  53                 start_time , end_time  , dt ,
  54                 observer , stepper_category() );
  55     }
  56     else
  57     {
  58         return detail::integrate_const( stepper , system , start_state ,
  59                                         start_time , end_time , dt ,
  60                                         observer , stepper_category() );
  61       }
  62 }
  63
  64 /**
  65  * \brief Second version to solve the forwarding problem,
  66  * can be called with Boost.Range as start_state.
  67  */
  68 template< class Stepper , class System , class State , class Time , class Observer >
  69 size_t integrate_const(
  70         Stepper stepper , System system , const State &start_state ,
  71         Time start_time , Time end_time , Time dt ,
  72         Observer observer
  73 )
  74 {
  75     typedef typename odeint::unwrap_reference< Stepper >::type::stepper_category stepper_category;
  76     // we want to get as fast as possible to the end
  77     if( boost::is_same< null_observer , Observer >::value )
  78     {
  79         return detail::integrate_adaptive(
  80                 stepper , system , start_state ,
  81                 start_time , end_time  , dt ,
  82                 observer , stepper_category() );
  83     }
  84     else
  85     {
  86         return detail::integrate_const( stepper , system , start_state ,
  87                                         start_time , end_time , dt ,
  88                                         observer , stepper_category() );
  89     }
  90 }
  91
  92
  93
  94
  95
  96 /**
  97  * \brief integrate_const without observer calls
  98  */
  99 template< class Stepper , class System , class State , class Time >
 100 size_t integrate_const(
 101         Stepper stepper , System system , State &start_state ,
 102         Time start_time , Time end_time , Time dt
 103 )
 104 {
 105     return integrate_const( stepper , system , start_state , start_time , end_time , dt , null_observer() );
 106 }
 107
 108 /**
 109  * \brief Second version to solve the forwarding problem,
 110  * can be called with Boost.Range as start_state.
 111  */
 112 template< class Stepper , class System , class State , class Time >
 113 size_t integrate_const(
 114         Stepper stepper , System system , const State &start_state ,
 115         Time start_time , Time end_time , Time dt
 116 )
 117 {
 118     return integrate_const( stepper , system , start_state , start_time , end_time , dt , null_observer() );
 119 }
 120
 121
 122
 123
 124
 125
 126 /********* DOXYGEN *********/
 127     /**
 128      * \fn integrate_const( Stepper stepper , System system , State &start_state , Time start_time , Time end_time , Time dt , Observer observer )
 129      * \brief Integrates the ODE with constant step size.
 130      *
 131      * Integrates the ODE defined by system using the given stepper.
 132      * This method ensures that the observer is called at constant intervals dt.
 133      * If the Stepper is a normal stepper without step size control, dt is also
 134      * used for the numerical scheme. If a ControlledStepper is provided, the
 135      * algorithm might reduce the step size to meet the error bounds, but it is
 136      * ensured that the observer is always called at equidistant time points
 137      * t0 + n*dt. If a DenseOutputStepper is used, the step size also may vary
 138      * and the dense output is used to call the observer at equidistant time
 139      * points.
 140      *
 141      * \param stepper The stepper to be used for numerical integration.
 142      * \param system Function/Functor defining the rhs of the ODE.
 143      * \param start_state The initial condition x0.
 144      * \param start_time The initial time t0.
 145      * \param end_time The final integration time tend.
 146      * \param dt The time step between observer calls, _not_ necessarily the
 147      * time step of the integration.
 148      * \param observer Function/Functor called at equidistant time intervals.
 149      * \return The number of steps performed.
 150      */
 151
 152 } // namespace odeint
 153 } // namespace numeric
 154 } // namespace boost
 155
 156
 157
 158 #endif // BOOST_NUMERIC_ODEINT_INTEGRATE_INTEGRATE_CONST_HPP_INCLUDED