/*************************************************************************
*  Copyright (C) 2004 by Olivier Galizzi                                 *
*  olivier.galizzi@imag.fr                                               *
*  Copyright (C) 2004 by Janek Kozicki                                   *
*  cosurgi@berlios.de                                                    *
*                                                                        *
*  This program is free software; it is licensed under the terms of the  *
*  GNU General Public License v2 or later. See file LICENSE for details. *
*************************************************************************/

#include "Interaction.hpp"

#include <core/Scene.hpp>

namespace yade { // Cannot have #include directive inside.

Interaction::Interaction(Body::id_t newId1, Body::id_t newId2)
        : id1(newId1)
        , id2(newId2)
        , cellDist(Vector3i(0, 0, 0))
{
	reset();
}

bool Interaction::isFresh(Scene* rb) { return iterMadeReal == rb->iter; }

void Interaction::init()
{
	iterMadeReal            = -1;
	functorCache.geomExists = true;
	isActive                = true;
}

void Interaction::reset()
{
	geom                  = shared_ptr<IGeom>();
	phys                  = shared_ptr<IPhys>();
	functorCache.geom     = nullptr;
	functorCache.phys     = nullptr;
	functorCache.constLaw = nullptr;
	init();
}


void Interaction::swapOrder()
{
	if (geom || phys) { throw std::logic_error("Bodies in interaction cannot be swapped if they have geom or phys."); }
	std::swap(id1, id2);
	cellDist *= -1;
}

} // namespace yade
