/**
 * This source file is part of OgreColladaPlugin
 * an addon for OGRE (Object-oriented Graphics Rendering Engine)
 * For the latest info, see http://www.ogre3d.org/
 *
 * This program is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License as published by the Free Software
 * Foundation; either version 2 of the License, or (at your option) any later
 * version.

 * This program 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 Lesser General Public License for more details.

 * You should have received a copy of the GNU Lesser General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
 * Place - Suite 330, Boston, MA 02111-1307, USA, or go to
 * http://www.gnu.org/copyleft/lesser.txt.
 *
 * @author	Philipp Hartl
 * @see		README
 */

#ifndef __COLLADA_LIGHT_H__
#define __COLLADA_LIGHT_H__

#include "OgreColladaPrerequisites.h"
#include "OgreColladaEntity.h"

#include "OgreColourValue.h"

namespace Ogre
{
	/** 
	 * light specific types
	 */
	namespace ColladaLightSpecific
	{
		enum Type
		{
			AMBIENT = 0,
			DIRECTIONAL,
			POINT,
			SPOT,

			UNKNOWN = -1
		};

		enum Function
		{
			CONSTANT = 0,
			LINEAR,
			QUADRATIC
		};

		/**
		 * compare the string with collada syntax
		 *
		 * @param	s	the type string we've parsed
		 * @return	the corresponding light type
		 */
		Type getType(const String &s);

		/**
		 * return the right function in case of given string
		 * 
		 * @param	s the function string
		 * @return	the corresponding function type
		 */
		Function getFunction(const String &s);
	}

	class ColladaLight : public ColladaEntity
	{
	public:
		ColladaLight(ColladaDocument *d, xmlNode *n);
		virtual ~ColladaLight(void);

		/**
		 * create ogre light
		 *
		 * @see	base class
		 */
		virtual MovableObject *getOgreInstance(void) const;

		/**
		 * import <light>
		 *
		 * @param	none
		 * @return	true if succeeds, false otherwise
		 */
		virtual bool doImport(void);

		virtual EntityTypes getEntityType(void) const { return LIGHT; }

	private:
		// for all light types
		ColladaLightSpecific::Type mType;
		ColourValue mColour;

		// point light specific
		float mAttenuationScale;
		ColladaLightSpecific::Function mAttenuation;

		// spot light specific
		float mAngle;
		float mFalloffScale;
		ColladaLightSpecific::Function mFalloff;
	};
}

#endif // __COLLADA_LIGHT_H__