/*
   Copyright (C) 2001-2006, William Joseph.
   All Rights Reserved.

   This file is part of GtkRadiant.

   GtkRadiant is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.

   GtkRadiant is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with GtkRadiant; if not, write to the Free Software
   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */

#if !defined( INCLUDED_ORIGIN_H )
#define INCLUDED_ORIGIN_H

#include "ientity.h"

#include "math/matrix.h"
#include "generic/callback.h"
#include "stringio.h"

const Vector3 ORIGINKEY_IDENTITY = Vector3( 0, 0, 0 );

inline void default_origin( Vector3& origin ){
	origin = ORIGINKEY_IDENTITY;
}
inline void read_origin( Vector3& origin, const char* value ){
	if ( !string_parse_vector3( value, origin ) ) {
		default_origin( origin );
	}
}
inline void write_origin( const Vector3& origin, Entity* entity, const char* key ){
	char value[64];
	sprintf( value, "%f %f %f", origin[0], origin[1], origin[2] );
	entity->setKeyValue( key, value );
}

inline Vector3 origin_translated( const Vector3& origin, const Vector3& translation ){
	return matrix4_get_translation_vec3(
			   matrix4_multiplied_by_matrix4(
				   matrix4_translation_for_vec3( origin ),
				   matrix4_translation_for_vec3( translation )
				   )
			   );
}

inline Vector3 origin_snapped( const Vector3& origin, float snap ){
	return vector3_snapped( origin, snap );
}

class OriginKey
{
Callback<void()> m_originChanged;
public:
Vector3 m_origin;


OriginKey( const Callback<void()>& originChanged )
	: m_originChanged( originChanged ), m_origin( ORIGINKEY_IDENTITY ){
}

void originChanged( const char* value ){
	read_origin( m_origin, value );
	m_originChanged();
}
typedef MemberCaller<OriginKey, void(const char*), &OriginKey::originChanged> OriginChangedCaller;


void write( Entity* entity ) const {
	write_origin( m_origin, entity, "origin" );
}
};


#include "scenelib.h"

inline BrushDoom3* Node_getBrushDoom3( scene::Node& node ){
	return NodeTypeCast<BrushDoom3>::cast( node );
}

inline void BrushDoom3_setDoom3GroupOrigin( scene::Node& node, const Vector3& origin ){
	BrushDoom3* brush = Node_getBrushDoom3( node );
	if ( brush != 0 ) {
		brush->setDoom3GroupOrigin( origin );
	}
}

class SetDoom3GroupOriginWalker : public scene::Traversable::Walker
{
const Vector3& m_origin;
public:
SetDoom3GroupOriginWalker( const Vector3& origin ) : m_origin( origin ){
}
bool pre( scene::Node& node ) const {
	BrushDoom3_setDoom3GroupOrigin( node, m_origin );
	return true;
}
};

class Doom3GroupOrigin : public scene::Traversable::Observer
{
scene::Traversable& m_set;
const Vector3& m_origin;
bool m_enabled;

public:
Doom3GroupOrigin( scene::Traversable& set, const Vector3& origin ) : m_set( set ), m_origin( origin ), m_enabled( false ){
}

void enable(){
	m_enabled = true;
	originChanged();
}
void disable(){
	m_enabled = false;
}

void originChanged(){
	if ( m_enabled ) {
		m_set.traverse( SetDoom3GroupOriginWalker( m_origin ) );
	}
}

void insert( scene::Node& node ){
	if ( m_enabled ) {
		BrushDoom3_setDoom3GroupOrigin( node, m_origin );
	}
}
void erase( scene::Node& node ){
	if ( m_enabled ) {
		BrushDoom3_setDoom3GroupOrigin( node, Vector3( 0, 0, 0 ) );
	}
}
};


#endif
