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- /*
- [auto_generated]
- boost/numeric/odeint/integrate/detail/integrate_const.hpp
- [begin_description]
- integrate const 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_CONST_HPP_INCLUDED
- #define BOOST_NUMERIC_ODEINT_INTEGRATE_DETAIL_INTEGRATE_CONST_HPP_INCLUDED
- #include <boost/range/algorithm/for_each.hpp>
- #include <boost/numeric/odeint/util/unwrap_reference.hpp>
- #include <boost/numeric/odeint/stepper/stepper_categories.hpp>
- #include <boost/numeric/odeint/util/unit_helper.hpp>
- #include <boost/numeric/odeint/iterator/const_step_time_iterator.hpp>
- #include <boost/numeric/odeint/iterator/integrate/detail/integrate_adaptive.hpp>
- #include <boost/numeric/odeint/iterator/integrate/detail/functors.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
- );
- template< class Stepper , class System , class State , class Time , class Observer >
- size_t integrate_const(
- Stepper stepper , System system , State &start_state ,
- Time start_time , Time end_time , Time dt ,
- Observer observer , stepper_tag
- )
- {
- size_t obs_calls = 0;
- boost::for_each( make_const_step_time_range( stepper , system , start_state ,
- start_time , end_time , dt ) ,
- // should we use traits<Stepper>::state_type here instead of State? NO!
- obs_caller< Observer >( obs_calls , observer ) );
- // step integration steps gives step+1 observer calls
- return obs_calls-1;
- }
- template< class Stepper , class System , class State , class Time , class Observer >
- size_t integrate_const(
- Stepper stepper , System system , State &start_state ,
- Time start_time , Time end_time , Time dt ,
- Observer observer , controlled_stepper_tag
- )
- {
- typename odeint::unwrap_reference< Observer >::type &obs = observer;
-
- Time time = start_time;
- const Time time_step = dt;
- int step = 0;
-
- while( less_eq_with_sign( static_cast<Time>(time+time_step) , end_time , dt ) )
- {
- obs( start_state , time );
- detail::integrate_adaptive( stepper , system , start_state , 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
- ++step;
- time = start_time + static_cast< typename unit_value_type<Time>::type >(step) * time_step;
- }
- obs( start_state , time );
-
- return step;
- }
- template< class Stepper , class System , class State , class Time , class Observer >
- size_t integrate_const(
- Stepper stepper , System system , State &start_state ,
- Time start_time , Time end_time , Time dt ,
- Observer observer , dense_output_stepper_tag
- )
- {
- size_t obs_calls = 0;
- boost::for_each( make_const_step_time_range( stepper , system , start_state ,
- start_time , end_time , dt ) ,
- obs_caller< Observer >( obs_calls , observer ) );
- return obs_calls-1;
- }
- } } } }
- #endif
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