/* -----------------------------------------------------------------------------
	GSFramework
	Copyright 2001-2013 Emmanuel Julien. All Rights Reserved.
----------------------------------------------------------------------------- */


		#include "physic/physic_wheel.h"
		#include "math/matrix4.h"
		#include "metafile/nml.h"
		#include "log/log.h"

		using namespace GS::S3D;
		using GS::NML::Tag;


//------------------------------------------------------------------------------
bool				PhysicWheel::FromMetaTag(Tag &tag)
{
	if	(tag.name != "PhysicWheel")
		__ERR__(__LOG_E__ << "Could not parse physic wheel, incorrect root tag (" << tag.name << ").\n", false)

	// Parse root tags.
	NMLTagForeach(pt, tag)
	{
				if	(pt->name == "Friction")		friction = pt->GetReal();
		else	if	(pt->name == "Radius")			radius = pt->GetReal();

		else	if	(pt->name == "RefMatrix")		ref_matrix.FromMetaTag(*pt);

		else	if	(pt->name == "RestLength")		rest_length = pt->GetReal();
		else	if	(pt->name == "MaxCompression")	max_compression = pt->GetReal();
		else	if	(pt->name == "Stiffness")		stiffness = pt->GetReal();
		else	if	(pt->name == "Damping")			damping = pt->GetReal();

		else	__LOG_W__ << "Unknown tag '" << pt->name << "' in <PhysicWheel>.\n";
	}
	return true;
}
Tag					*PhysicWheel::AsMetaTag() const
{
	Tag	*root = new Tag("PhysicWheel");
	if	(!root)
		__ERR__(__LOG_E__ << "Could not create physic wheel root tag to serialize.\n", NULL)

	root->AddChild("Friction", friction);
	root->AddChild("Radius", radius);

	root->AddChild(ref_matrix.AsMetaTag("RefMatrix"));

	root->AddChild("RestLength", rest_length);
	root->AddChild("MaxCompression", max_compression);
	root->AddChild("Stiffness", stiffness);
	root->AddChild("Damping", damping);
	return root;
}
//------------------------------------------------------------------------------

PhysicWheel::PhysicWheel()
{
	ref_matrix = Matrix4::IdentityMatrix();

	friction = 50.f;
	radius = 0.3f;

	rest_length = 1.0f;
	max_compression = 2.0f;
	stiffness = 30.f;
	damping = 0.25f;
}