/*
   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_ANGLES_H )
#define INCLUDED_ANGLES_H

#include "ientity.h"

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

#include "angle.h"

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

inline void default_angles(Vector3 &angles)
{
	angles = ANGLESKEY_IDENTITY;
}

inline void normalise_angles(Vector3 &angles)
{
	angles[0] = static_cast<float>( float_mod(angles[0], 360));
	angles[1] = static_cast<float>( float_mod(angles[1], 360));
	angles[2] = static_cast<float>( float_mod(angles[2], 360));
}

inline void read_angle(Vector3 &angles, const char *value)
{
	if (!string_parse_float(value, angles[2])) {
		default_angles(angles);
	} else {
		angles[0] = 0;
		angles[1] = 0;
		normalise_angles(angles);
	}
}

inline void read_angles(Vector3 &angles, const char *value)
{
	if (!string_parse_vector3(value, angles)) {
		default_angles(angles);
		printf("Failed to read angles!\n");
	} else {
		angles = Vector3(angles[2], angles[0], angles[1]);
		normalise_angles(angles);
	}
}

inline void write_angles(const Vector3 &angles, Entity *entity)
{
	if (angles[0] == 0
	    && angles[1] == 0
	    && angles[2] == 0) {
		entity->setKeyValue("angles", "");
	} else {
		char value[64];
		sprintf(value, "%f %f %f", angles[1], angles[2], angles[0]);
		entity->setKeyValue("angles", value);
	}
}

inline Vector3 angles_rotated(const Vector3 &angles, const Quaternion &rotation)
{
	return matrix4_get_rotation_euler_xyz_degrees(
		matrix4_multiplied_by_matrix4(
			matrix4_rotation_for_euler_xyz_degrees(angles),
			matrix4_rotation_for_quaternion_quantised(rotation)
			)
		);
}

class AnglesKey {
Callback<void()> m_anglesChanged;
public:
Vector3 m_angles;


AnglesKey(const Callback<void()> &anglesChanged)
	: m_anglesChanged(anglesChanged), m_angles(ANGLESKEY_IDENTITY)
{
}

void angleChanged(const char *value)
{
	read_angle(m_angles, value);
	m_anglesChanged();
}

typedef MemberCaller<AnglesKey, void (const char *), &AnglesKey::angleChanged> AngleChangedCaller;

void anglesChanged(const char *value)
{
	read_angles(m_angles, value);
	m_anglesChanged();
}

typedef MemberCaller<AnglesKey, void (const char *), &AnglesKey::anglesChanged> AnglesChangedCaller;

void write(Entity *entity) const
{
	write_angles(m_angles, entity);
}
};


#endif