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