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123 lines
2.7 KiB
C++
123 lines
2.7 KiB
C++
/*
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[auto_generated]
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libs/numeric/odeint/test/dummy_steppers.hpp
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[begin_description]
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Dummy steppers for several tests.
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[end_description]
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Copyright 2012 Karsten Ahnert
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Copyright 2012 Mario Mulansky
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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_LIBS_NUMERIC_ODEINT_TEST_DUMMY_STEPPER_HPP_INCLUDED
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#define BOOST_LIBS_NUMERIC_ODEINT_TEST_DUMMY_STEPPER_HPP_INCLUDED
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#include <boost/array.hpp>
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#include <boost/numeric/odeint/stepper/stepper_categories.hpp>
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#include <boost/numeric/odeint/stepper/controlled_step_result.hpp>
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namespace boost {
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namespace numeric {
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namespace odeint {
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struct dummy_stepper
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{
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typedef double value_type;
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typedef value_type time_type;
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typedef boost::array< value_type , 1 > state_type;
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typedef state_type deriv_type;
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typedef unsigned short order_type;
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typedef stepper_tag stepper_category;
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order_type order( void ) const { return 1; }
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template< class System >
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void do_step( System sys , state_type &x , time_type t , time_type dt ) const
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{
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x[0] += 0.25;
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}
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};
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struct dummy_dense_output_stepper
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{
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typedef double value_type;
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typedef value_type time_type;
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typedef boost::array< value_type , 1 > state_type;
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typedef state_type deriv_type;
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typedef dense_output_stepper_tag stepper_category;
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void initialize( const state_type &x0 , time_type t0 , time_type dt0 )
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{
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m_x = x0;
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m_t = t0;
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m_dt = dt0;
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}
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template< class System >
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std::pair< time_type , time_type > do_step( System sys )
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{
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m_x[0] += 0.25;
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m_t += m_dt;
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return std::make_pair( m_t - m_dt , m_t );
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}
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void calc_state( time_type t_inter , state_type &x ) const
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{
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value_type theta = ( m_t - t_inter ) / m_dt;
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x[0] = m_x[0] - 0.25 * theta;
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}
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const time_type& current_time( void ) const
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{
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return m_t;
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}
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const state_type& current_state( void ) const
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{
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return m_x;
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}
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const time_type& current_time_step( void ) const
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{
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return m_dt;
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}
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state_type m_x;
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time_type m_t;
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time_type m_dt;
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};
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struct dummy_controlled_stepper
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{
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typedef double value_type;
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typedef value_type time_type;
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typedef boost::array< value_type , 1 > state_type;
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typedef state_type deriv_type;
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typedef controlled_stepper_tag stepper_category;
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template< class Sys >
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controlled_step_result try_step( Sys sys , state_type &x , time_type &t , time_type &dt ) const
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{
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x[0] += 0.25;
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t += dt;
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return success;
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}
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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_LIBS_NUMERIC_ODEINT_TEST_DUMMY_STEPPER_HPP_INCLUDED
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