/*
--------------------------------------------------------------------------------
This source file is part of SkyX.
Visit ---

Copyright (C) 2009 Xavier Verguín González <xavierverguin@hotmail.com>
                                           <xavyiy@gmail.com>

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.
--------------------------------------------------------------------------------
*/

#ifndef _SkyX_VClouds_GeometryManager_H_
#define _SkyX_VClouds_GeometryManager_H_

#include "SkyxPrerequisites.h"
#include "SkyxGeometryBlock.h"

namespace SkyX
{
	namespace VClouds
	{

	/*!
	*/
	class SkyXDllExport GeometryManager
	{
	public:
	protected:
	private:
		Ogre::Vector2 mHeight;				          		//!< Height: x = Altitude over the camera, y: Field height (both in world coordinates)
		Ogre::Radian mAlpha, mBeta;					        //!< Angles
		float mRadius;								              //!< Radius
		Ogre::Radian mPhi;							            //!< Azimutal angle per block
		int mNumberOfBlocks;						            //!< Number of blocks
		int mNa, mNb, mNc;							            //!< Number of slices per geometry zone
		Ogre::Vector2 mWorldOffset;					        //!< World coords offset
		std::vector<GeometryBlock*> mGeometryBlocks;//!< Geometry blocks
		Ogre::SceneNode* mSceneNode;				        //!< Scene node
		VClouds* mVClouds;							            //!< VClouds pointer

	public:
		/*!
		Constructor
		@param vc VClouds pointer
		@param Height x = Altitude over the camera, y: Field height (both in world coordinates)
		@param Radius Radius
		@param Alpha Alpha angle
		@param Beta Beta angle
		@param NumberOfBlocks Number of geometry blocks
		@param Na Number of slices in A zone
		@param Nb Number of slices in B zone
		@param Nc Number of slices in C zone
		*/
		GeometryManager(VClouds* vc,
						const Ogre::Vector2& Height, const float& Radius,
						const Ogre::Radian& Alpha, const Ogre::Radian& Beta, 
						const int& NumberOfBlocks, const int& Na, const int& Nb, const int& Nc);

		/*!
		Destructor
		*/
		~GeometryManager();

		/*!
		Call every frame
		@param timeSinceLastFrame Time since last frame
    */
    void update(const Ogre::Real& timeSinceLastFrame);

    /*!
    Internal use only.
    */
    void _notifyCameraChanged(Ogre::Camera* newCamera);
	protected:
	private:
		/*!
		Create geometry
		*/
		void _createGeometry();

		/*!
		Update geometry
		@param timeSinceLastFrame Time since last frame
		*/
		void _updateGeometry(const Ogre::Real& timeSinceLastFrame);
	};


	}
}

#endif