202 lines
6.2 KiB
Plaintext
202 lines
6.2 KiB
Plaintext
/*
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[auto_generated]
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boost/numeric/odeint/stepper/adams_moulton.hpp
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[begin_description]
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Implementation of the Adams-Moulton method. This is method is not a real stepper, it is more a helper class
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which computes the corrector step in the Adams-Bashforth-Moulton method.
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[end_description]
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Copyright 2011-2012 Karsten Ahnert
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Copyright 2011-2013 Mario Mulansky
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Copyright 2012 Christoph Koke
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Distributed under the Boost Software License, Version 1.0.
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(See accompanying file LICENSE_1_0.txt or
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copy at http://www.boost.org/LICENSE_1_0.txt)
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*/
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#ifndef BOOST_NUMERIC_ODEINT_STEPPER_ADAMS_MOULTON_HPP_INCLUDED
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#define BOOST_NUMERIC_ODEINT_STEPPER_ADAMS_MOULTON_HPP_INCLUDED
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#include <boost/numeric/odeint/util/bind.hpp>
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#include <boost/numeric/odeint/algebra/range_algebra.hpp>
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#include <boost/numeric/odeint/algebra/default_operations.hpp>
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#include <boost/numeric/odeint/algebra/algebra_dispatcher.hpp>
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#include <boost/numeric/odeint/algebra/operations_dispatcher.hpp>
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#include <boost/numeric/odeint/util/state_wrapper.hpp>
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#include <boost/numeric/odeint/util/is_resizeable.hpp>
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#include <boost/numeric/odeint/util/resizer.hpp>
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#include <boost/numeric/odeint/stepper/stepper_categories.hpp>
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#include <boost/numeric/odeint/stepper/runge_kutta4_classic.hpp>
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#include <boost/numeric/odeint/stepper/detail/adams_moulton_call_algebra.hpp>
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#include <boost/numeric/odeint/stepper/detail/adams_moulton_coefficients.hpp>
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#include <boost/numeric/odeint/stepper/detail/rotating_buffer.hpp>
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namespace boost {
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namespace numeric {
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namespace odeint {
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/*
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* Static implicit Adams-Moulton multistep-solver without step size control and without dense output.
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*/
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template<
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size_t Steps ,
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class State ,
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class Value = double ,
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class Deriv = State ,
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class Time = Value ,
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class Algebra = typename algebra_dispatcher< State >::algebra_type ,
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class Operations = typename operations_dispatcher< State >::operations_type ,
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class Resizer = initially_resizer
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>
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class adams_moulton
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{
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private:
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public :
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typedef State state_type;
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typedef state_wrapper< state_type > wrapped_state_type;
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typedef Value value_type;
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typedef Deriv deriv_type;
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typedef state_wrapper< deriv_type > wrapped_deriv_type;
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typedef Time time_type;
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typedef Algebra algebra_type;
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typedef Operations operations_type;
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typedef Resizer resizer_type;
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typedef stepper_tag stepper_category;
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typedef adams_moulton< Steps , State , Value , Deriv , Time , Algebra , Operations , Resizer > stepper_type;
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static const size_t steps = Steps;
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typedef unsigned short order_type;
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static const order_type order_value = steps + 1;
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typedef detail::rotating_buffer< wrapped_deriv_type , steps > step_storage_type;
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adams_moulton( )
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: m_coefficients() , m_dxdt() , m_resizer() ,
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m_algebra_instance() , m_algebra( m_algebra_instance )
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{ }
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adams_moulton( algebra_type &algebra )
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: m_coefficients() , m_dxdt() , m_resizer() ,
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m_algebra_instance() , m_algebra( algebra )
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{ }
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adams_moulton& operator=( const adams_moulton &stepper )
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{
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m_dxdt = stepper.m_dxdt;
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m_resizer = stepper.m_resizer;
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m_algebra = stepper.m_algebra;
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return *this;
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}
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order_type order( void ) const { return order_value; }
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/*
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* Version 1 : do_step( system , x , t , dt , buf );
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*
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* solves the forwarding problem
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*/
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template< class System , class StateInOut , class StateIn , class ABBuf >
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void do_step( System system , StateInOut &x , StateIn const & pred , time_type t , time_type dt , const ABBuf &buf )
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{
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do_step( system , x , pred , t , x , dt , buf );
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}
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template< class System , class StateInOut , class StateIn , class ABBuf >
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void do_step( System system , const StateInOut &x , StateIn const & pred , time_type t , time_type dt , const ABBuf &buf )
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{
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do_step( system , x , pred , t , x , dt , buf );
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}
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/*
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* Version 2 : do_step( system , in , t , out , dt , buf );
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*
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* solves the forwarding problem
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*/
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template< class System , class StateIn , class PredIn , class StateOut , class ABBuf >
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void do_step( System system , const StateIn &in , const PredIn &pred , time_type t , StateOut &out , time_type dt , const ABBuf &buf )
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{
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do_step_impl( system , in , pred , t , out , dt , buf );
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}
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template< class System , class StateIn , class PredIn , class StateOut , class ABBuf >
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void do_step( System system , const StateIn &in , const PredIn &pred , time_type t , const StateOut &out , time_type dt , const ABBuf &buf )
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{
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do_step_impl( system , in , pred , t , out , dt , buf );
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}
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template< class StateType >
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void adjust_size( const StateType &x )
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{
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resize_impl( x );
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}
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algebra_type& algebra()
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{ return m_algebra; }
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const algebra_type& algebra() const
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{ return m_algebra; }
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private:
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template< class System , class StateIn , class PredIn , class StateOut , class ABBuf >
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void do_step_impl( System system , const StateIn &in , const PredIn &pred , time_type t , StateOut &out , time_type dt , const ABBuf &buf )
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{
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typename odeint::unwrap_reference< System >::type &sys = system;
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m_resizer.adjust_size( in , detail::bind( &stepper_type::template resize_impl<StateIn> , detail::ref( *this ) , detail::_1 ) );
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sys( pred , m_dxdt.m_v , t );
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detail::adams_moulton_call_algebra< steps , algebra_type , operations_type >()( m_algebra , in , out , m_dxdt.m_v , buf , m_coefficients , dt );
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}
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template< class StateIn >
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bool resize_impl( const StateIn &x )
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{
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return adjust_size_by_resizeability( m_dxdt , x , typename is_resizeable<deriv_type>::type() );
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}
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const detail::adams_moulton_coefficients< value_type , steps > m_coefficients;
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wrapped_deriv_type m_dxdt;
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resizer_type m_resizer;
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protected:
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algebra_type m_algebra_instance;
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algebra_type &m_algebra;
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};
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} // odeint
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} // numeric
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} // boost
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#endif // BOOST_NUMERIC_ODEINT_STEPPER_ADAMS_MOULTON_HPP_INCLUDED
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