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152 lines
3.0 KiB
C++
152 lines
3.0 KiB
C++
/*
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[auto_generated]
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libs/numeric/odeint/test/dummy_odes.hpp
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[begin_description]
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tba.
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[end_description]
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Copyright 2012-2013 Karsten Ahnert
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Copyright 2013 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 LIBS_NUMERIC_ODEINT_TEST_DUMMY_ODES_HPP_DEFINED
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#define LIBS_NUMERIC_ODEINT_TEST_DUMMY_ODES_HPP_DEFINED
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#include <boost/fusion/include/at_c.hpp>
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/*
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* rhs functors/functions for different state types
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*/
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struct constant_system_functor_standard
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{
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template< class State , class Deriv , class Time >
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void operator()( const State &x , Deriv &dxdt , const Time t ) const
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{
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dxdt[0] = 1.0;
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}
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};
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struct constant_system_functor_vector_space
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{
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template< class State , class Deriv , class Time >
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void operator()( const State &x , Deriv &dxdt , const Time t ) const
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{
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dxdt = 1.0;
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}
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};
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struct constant_system_functor_fusion
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{
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template< class State , class Deriv , class Time >
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void operator()( const State &x , Deriv &dxdt , const Time t ) const
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{
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boost::fusion::at_c< 0 >( dxdt ) = boost::fusion::at_c< 0 >( x ) / Time( 1.0 );
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}
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};
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struct lorenz
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{
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template< typename State , typename Deriv , typename Time >
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void operator()( const State& x , Deriv& dxdt , const Time& t ) const
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{
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const Time sigma = 10.0;
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const Time R = 28.0;
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const Time b = 8.0 / 3.0;
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dxdt[0] = sigma * ( x[1] - x[0] );
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dxdt[1] = R * x[0] - x[1] - x[0] * x[2];
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dxdt[2] = -b * x[2] + x[0] * x[1];
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}
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};
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template< class State , class Deriv , class Time >
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void constant_system_standard( const State &x , Deriv &dxdt , const Time t )
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{
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dxdt[0] = 1.0;
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}
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template< class State , class Deriv , class Time >
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void constant_system_vector_space( const State &x , Deriv &dxdt , const Time t )
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{
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dxdt = 1.0;
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}
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template< class State , class Deriv , class Time >
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void constant_system_fusion( const State &x , Deriv &dxdt , const Time t )
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{
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boost::fusion::at_c< 0 >( dxdt ) = boost::fusion::at_c< 0 >( x ) / Time( 1.0 );
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}
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/*
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* rhs functors for symplectic steppers
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*/
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struct constant_mom_func
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{
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template< class StateIn , class StateOut >
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void operator()( const StateIn &q , StateOut &dp ) const
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{
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dp[0] = 1.0;
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}
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};
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struct default_coor_func
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{
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template< class StateIn , class StateOut >
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void operator()( const StateIn &p , StateOut &dq ) const
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{
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dq[0] = p[0];
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}
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};
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struct constant_mom_func_vector_space_1d
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{
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template< class T >
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void operator()( const T &q , T &dp ) const
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{
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dp = 1.0;
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}
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};
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struct default_coor_func_vector_space_1d
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{
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template< class T >
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void operator()( const T &p , T &dq ) const
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{
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dq = p;
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}
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};
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struct empty_system
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{
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template <class State >
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void operator()( const State &x , State &dxdt , double t ) const
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{
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}
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};
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#endif // LIBS_NUMERIC_ODEINT_TEST_DUMMY_ODES_HPP_DEFINED
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