mirror of
https://github.com/saitohirga/WSJT-X.git
synced 2025-07-27 03:02:28 -04:00
148 lines
4.2 KiB
C++
148 lines
4.2 KiB
C++
/* Boost lorenz.cpp test file
|
|
|
|
Copyright 2012 Karsten Ahnert
|
|
Copyright 2012 Mario Mulansky
|
|
|
|
This file tests the odeint library with the vexcl types
|
|
|
|
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)
|
|
*/
|
|
|
|
#define BOOST_TEST_MODULE odeint_vexcl
|
|
|
|
#include <vector>
|
|
#include <iostream>
|
|
|
|
#include <vexcl/vexcl.hpp>
|
|
|
|
#include <boost/numeric/odeint/stepper/runge_kutta4.hpp>
|
|
#include <boost/numeric/odeint/stepper/runge_kutta_cash_karp54.hpp>
|
|
#include <boost/numeric/odeint/stepper/runge_kutta_dopri5.hpp>
|
|
#include <boost/numeric/odeint/stepper/controlled_runge_kutta.hpp>
|
|
#include <boost/numeric/odeint/stepper/dense_output_runge_kutta.hpp>
|
|
#include <boost/numeric/odeint/algebra/vector_space_algebra.hpp>
|
|
#include <boost/numeric/odeint/integrate/integrate_const.hpp>
|
|
#include <boost/numeric/odeint/external/vexcl/vexcl.hpp>
|
|
|
|
#include <boost/test/unit_test.hpp>
|
|
|
|
using namespace boost::unit_test;
|
|
namespace odeint = boost::numeric::odeint;
|
|
|
|
|
|
typedef vex::vector< double > vector_type;
|
|
typedef vex::multivector< double, 3 > state_type;
|
|
|
|
|
|
|
|
const double sigma = 10.0;
|
|
const double b = 8.0 / 3.0;
|
|
|
|
struct sys_func
|
|
{
|
|
const vector_type &R;
|
|
|
|
sys_func( const vector_type &_R ) : R( _R ) { }
|
|
|
|
void operator()( const state_type &x , state_type &dxdt , double t ) const
|
|
{
|
|
dxdt(0) = -sigma * ( x(0) - x(1) );
|
|
dxdt(1) = R * x(0) - x(1) - x(0) * x(2);
|
|
dxdt(2) = - b * x(2) + x(0) * x(1);
|
|
}
|
|
};
|
|
|
|
const size_t n = 1024 ;
|
|
const double dt = 0.01;
|
|
const double t_max = 1.0;
|
|
|
|
|
|
BOOST_AUTO_TEST_CASE( integrate_const_rk4 )
|
|
{
|
|
vex::Context ctx( vex::Filter::Type(CL_DEVICE_TYPE_GPU) );
|
|
|
|
double Rmin = 0.1 , Rmax = 50.0 , dR = ( Rmax - Rmin ) / double( n - 1 );
|
|
std::vector<double> x( n * 3 ) , r( n );
|
|
for( size_t i=0 ; i<n ; ++i ) r[i] = Rmin + dR * double( i );
|
|
|
|
state_type X( ctx.queue() , n );
|
|
X(0) = 10.0;
|
|
X(1) = 10.0;
|
|
X(2) = 10.0;
|
|
|
|
vector_type R( ctx.queue() , r );
|
|
|
|
odeint::runge_kutta4<
|
|
state_type , double , state_type , double ,
|
|
odeint::vector_space_algebra , odeint::default_operations
|
|
> stepper;
|
|
|
|
odeint::integrate_const( stepper , sys_func( R ) , X , 0.0 , t_max , dt );
|
|
|
|
std::vector< double > res( 3 * n );
|
|
vex::copy( X(0) , res );
|
|
std::cout << res[0] << std::endl;
|
|
}
|
|
|
|
BOOST_AUTO_TEST_CASE( integrate_const_controlled_rk54 )
|
|
{
|
|
vex::Context ctx( vex::Filter::Type(CL_DEVICE_TYPE_GPU) );
|
|
|
|
double Rmin = 0.1 , Rmax = 50.0 , dR = ( Rmax - Rmin ) / double( n - 1 );
|
|
std::vector<double> x( n * 3 ) , r( n );
|
|
for( size_t i=0 ; i<n ; ++i ) r[i] = Rmin + dR * double( i );
|
|
|
|
state_type X( ctx.queue() , n );
|
|
X(0) = 10.0;
|
|
X(1) = 10.0;
|
|
X(2) = 10.0;
|
|
|
|
vector_type R( ctx.queue() , r );
|
|
|
|
typedef odeint::runge_kutta_cash_karp54<
|
|
state_type , double , state_type , double ,
|
|
odeint::vector_space_algebra , odeint::default_operations
|
|
> stepper_type;
|
|
typedef odeint::controlled_runge_kutta< stepper_type > controlled_stepper_type;
|
|
|
|
odeint::integrate_const( controlled_stepper_type() , sys_func( R ) , X , 0.0 , t_max , dt );
|
|
|
|
std::vector< double > res( 3 * n );
|
|
vex::copy( X(0) , res );
|
|
std::cout << res[0] << std::endl;
|
|
}
|
|
|
|
BOOST_AUTO_TEST_CASE( integrate_const_dense_output_dopri5 )
|
|
{
|
|
vex::Context ctx( vex::Filter::Type(CL_DEVICE_TYPE_GPU) );
|
|
|
|
double Rmin = 0.1 , Rmax = 50.0 , dR = ( Rmax - Rmin ) / double( n - 1 );
|
|
std::vector<double> x( n * 3 ) , r( n );
|
|
for( size_t i=0 ; i<n ; ++i ) r[i] = Rmin + dR * double( i );
|
|
|
|
state_type X( ctx.queue() , n );
|
|
X(0) = 10.0;
|
|
X(1) = 10.0;
|
|
X(2) = 10.0;
|
|
|
|
vector_type R( ctx.queue() , r );
|
|
|
|
typedef odeint::runge_kutta_dopri5<
|
|
state_type , double , state_type , double ,
|
|
odeint::vector_space_algebra , odeint::default_operations
|
|
> stepper_type;
|
|
typedef odeint::controlled_runge_kutta< stepper_type > controlled_stepper_type;
|
|
typedef odeint::dense_output_runge_kutta< controlled_stepper_type > dense_output_stepper_type;
|
|
|
|
odeint::integrate_const( dense_output_stepper_type() , sys_func( R ) , X , 0.0 , t_max , dt );
|
|
|
|
std::vector< double > res( 3 * n );
|
|
vex::copy( X(0) , res );
|
|
std::cout << res[0] << std::endl;
|
|
}
|
|
|
|
|
|
|