| /* |
| [auto_generated] |
| boost/numeric/odeint/integrate/detail/integrate_n_steps.hpp |
| |
| [begin_description] |
| integrate steps implementation |
| [end_description] |
| |
| Copyright 2009-2012 Karsten Ahnert |
| Copyright 2009-2012 Mario Mulansky |
| |
| Distributed under the Boost Software License, Version 1.0. |
| (See accompanying file LICENSE_1_0.txt or |
| copy at http://www.boost.org/LICENSE_1_0.txt) |
| */ |
| |
| #ifndef BOOST_NUMERIC_ODEINT_INTEGRATE_DETAIL_INTEGRATE_N_STEPS_HPP_INCLUDED |
| #define BOOST_NUMERIC_ODEINT_INTEGRATE_DETAIL_INTEGRATE_N_STEPS_HPP_INCLUDED |
| |
| #include <boost/numeric/odeint/util/unwrap_reference.hpp> |
| #include <boost/numeric/odeint/stepper/stepper_categories.hpp> |
| #include <boost/numeric/odeint/iterator/integrate/detail/integrate_adaptive.hpp> |
| #include <boost/numeric/odeint/iterator/integrate/detail/functors.hpp> |
| #include <boost/numeric/odeint/iterator/n_step_time_iterator.hpp> |
| #include <boost/numeric/odeint/util/unit_helper.hpp> |
| |
| #include <boost/numeric/odeint/util/detail/less_with_sign.hpp> |
| |
| namespace boost { |
| namespace numeric { |
| namespace odeint { |
| namespace detail { |
| |
| // forward declaration |
| template< class Stepper , class System , class State , class Time , class Observer > |
| size_t integrate_adaptive( |
| Stepper stepper , System system , State &start_state , |
| Time &start_time , Time end_time , Time &dt , |
| Observer observer , controlled_stepper_tag |
| ); |
| |
| |
| /* basic version */ |
| template< class Stepper , class System , class State , class Time , class Observer> |
| Time integrate_n_steps( |
| Stepper stepper , System system , State &start_state , |
| Time start_time , Time dt , size_t num_of_steps , |
| Observer observer , stepper_tag ) |
| { |
| // ToDo: is there a better way to extract the final time? |
| Time t = start_time; // Assignment is only here to avoid warnings. |
| boost::for_each( make_n_step_time_range( stepper , system , start_state , |
| start_time , dt , num_of_steps ) , |
| obs_caller_time< Observer , Time >( t , observer ) ); |
| return t; |
| } |
| |
| |
| /* controlled version */ |
| template< class Stepper , class System , class State , class Time , class Observer> |
| Time integrate_n_steps( |
| Stepper stepper , System system , State &start_state , |
| Time start_time , Time dt , size_t num_of_steps , |
| Observer observer , controlled_stepper_tag ) |
| { |
| typename odeint::unwrap_reference< Observer >::type &obs = observer; |
| |
| Time time = start_time; |
| Time time_step = dt; |
| |
| for( size_t step = 0; step < num_of_steps ; ++step ) |
| { |
| obs( start_state , time ); |
| detail::integrate_adaptive( stepper , system , start_state , time , static_cast<Time>(time+time_step) , dt , |
| null_observer() , controlled_stepper_tag() ); |
| // direct computation of the time avoids error propagation happening when using time += dt |
| // we need clumsy type analysis to get boost units working here |
| time = start_time + static_cast< typename unit_value_type<Time>::type >(step+1) * time_step; |
| } |
| obs( start_state , time ); |
| |
| return time; |
| } |
| |
| |
| /* dense output version */ |
| template< class Stepper , class System , class State , class Time , class Observer> |
| Time integrate_n_steps( |
| Stepper stepper , System system , State &start_state , |
| Time start_time , Time dt , size_t num_of_steps , |
| Observer observer , dense_output_stepper_tag ) |
| { |
| // ToDo: is there a better way to extract the final time? |
| Time t = start_time; // Assignment is only here to avoid warnings. |
| boost::for_each( make_n_step_time_range( stepper , system , start_state , |
| start_time , dt , num_of_steps ) , |
| obs_caller_time< Observer , Time >( t , observer ) ); |
| return t; |
| } |
| |
| |
| } |
| } |
| } |
| } |
| |
| #endif /* BOOST_NUMERIC_ODEINT_INTEGRATE_DETAIL_INTEGRATE_N_STEPS_HPP_INCLUDED */ |