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#define BOOST_TEST_MAIN

#define BOOST_TEST_MODULE Particle

#include <boost/test/unit_test.hpp>

#include <boost/test/floating_point_comparison.hpp>



#include "Particle.h"

#include "../geometry/Constants.h"



using namespace Vamos_Body;

using namespace Vamos_Geometry;



const Three_Vector null_vector (0.0, 0.0, 0.0);

const Three_Vector ones (1.0, 1.0, 1.0);

const Three_Matrix identity;



// Rotate the identity 120 degrees about [1,1,1].  This moves z to x,

// x to y and y to z.

const Three_Matrix rotated (Three_Matrix ().

                            rotate (ones.unit () * 2.0 * pi / 3.0));



struct Particle_Fixture

{

  Particle_Fixture () 

    : frame (Three_Vector (1.0, 0.0, 0.0), rotated),

      particle (2.0, Three_Vector (0.0, 1.0, 1.0), rotated, &frame)

  {}

  Frame frame;

  Particle particle;

};



BOOST_AUTO_TEST_CASE (positions)

{

  Particle_Fixture f;

  BOOST_CHECK_EQUAL (f.particle.position (), Three_Vector (0.0, 1.0, 1.0));

  BOOST_CHECK_EQUAL (f.particle.contact_position (), Three_Vector (0.0, 1.0, 1.0));

  BOOST_CHECK_EQUAL (f.particle.force_position (), Three_Vector (0.0, 1.0, 1.0));

  BOOST_CHECK_EQUAL (f.particle.torque_position (), Three_Vector (0.0, 1.0, 1.0));

  BOOST_CHECK_EQUAL (f.particle.mass_position (), Three_Vector (0.0, 1.0, 1.0));



  //  BOOST_CHECK_EQUAL (f.particle.transform_to_parent (ones));

}



BOOST_AUTO_TEST_CASE (mass)

{

  Particle_Fixture f;

  BOOST_CHECK_EQUAL (f.particle.mass (), 2.0);

}