interactingsystem.cpp
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	#include "interactingsystem.h"
	#include "actors/particles/newtonparticle.h"

	#include "sktools.h"
	#include "skerror.h"

	using namespace symkit;

	void InteractingSystem::attach(Particle * particle)
	{
	if (!particle)
	throw SKError( ERR_NULL_POINTER,
	"attach",
	"InteractingSystem",
	"Passing a null pointer as parameter");

	Evolvable * ev = dynamic_cast<Evolvable*>(particle);

	if (!ev)
	throw SKError( ERR_OTHERS,
	"attach",
	"InteractingSystem",
	"Passing a non-evolvable parameter");

	ParticleSystem::attach(particle);
	}

	/*
	* Two times update call, for each particle
	* updateForces then evolve
	*/
	void InteractingSystem::evolve(float dt)
	{
	Evolvable * ev[2];

	/* Make particles interact each other */
	for (iterator iter_0 = begin(); iter_0 != end(); ++iter_0)
	{
	ev[0] = dynamic_cast<Evolvable>(iter_0);

	iterator iter_1 = iter_0;

	for (++iter_1; iter_1 != end(); ++iter_1)
	{
	ev[1] = dynamic_cast<Evolvable>(iter_1);

	if (ev[0]->isEvolving() && ev[1]->isEvolving())
	{
	ev[0]->evolve(dt);
	ev[1]->evolve(dt);
	interaction(iter_0, iter_1);
	}
	}
	}

	/* Call superclass method */
	ParticleSystem::evolve(dt);
	}