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

#include "VClouds/SkyxGeometryManager.h"
#include "VClouds/SkyxVClouds.h"

namespace SkyX
{
	namespace VClouds
	{

	GeometryManager::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)
	{
		mVClouds = vc;
		mHeight = Height;
		mRadius = Radius;
		mAlpha = Alpha;
    mBeta = Beta;
    mPhi = Ogre::Math::TWO_PI / NumberOfBlocks;
		mNumberOfBlocks = NumberOfBlocks;
		mNa = Na;
    mNb = Nb;
    mNc = Nc;
		mWorldOffset = Ogre::Vector2(0,0);

		mSceneNode = mVClouds->getSceneManager()->getRootSceneNode()->createChildSceneNode();
		_createGeometry();
	}

	GeometryManager::~GeometryManager()
	{
		mSceneNode->detachAllObjects();
		mSceneNode->getParentSceneNode()->removeAndDestroyChild(mSceneNode->getName());
		mSceneNode = 0;

		for (int k = 0; k < mNumberOfBlocks; k++)
		{
			delete mGeometryBlocks.at(k);
			mGeometryBlocks.at(k) = 0;
		}

		mGeometryBlocks.clear();
	}

	void GeometryManager::update(const Ogre::Real& timeSinceLastFrame)
	{
		_updateGeometry(timeSinceLastFrame);
		// TODO JEFF mLastCameraPosition = mVClouds->getCamera()->getDerivedPosition();
	}

	void GeometryManager::_createGeometry()
	{
		for (int k = 0; k < mNumberOfBlocks; k++)
		{
			mGeometryBlocks.push_back(new GeometryBlock(mVClouds, mHeight.y, mAlpha, mBeta, mRadius, mPhi, mNa, mNb, mNc, k));
			mGeometryBlocks.at(k)->create();
			// Each geometry block must be in a different scene node, See: GeometryBlock::isInFrustum(Ogre::Camera *c)
			Ogre::SceneNode *sn = mSceneNode->createChildSceneNode();
			sn->attachObject(mGeometryBlocks.at(k)->getEntity());
		}
	}

	void GeometryManager::_updateGeometry(const Ogre::Real& timeSinceLastFrame)
	{
    /*TODO JEFF 

		// Calculate wind offset
		Ogre::Vector2 CameraDirection = Ogre::Vector2(mVClouds->getCamera()->getDerivedDirection().x, mVClouds->getCamera()->getDerivedDirection().z);
		float offset = - CameraDirection.dotProduct(mVClouds->getWindDirectionV2()) * mVClouds->getWindSpeed() * timeSinceLastFrame;
		mWorldOffset += mVClouds->getWindDirectionV2() * mVClouds->getWindSpeed() * timeSinceLastFrame;

		// Calculate camera offset
		Ogre::Vector2 CameraOffset = Ogre::Vector2(mVClouds->getCamera()->getDerivedPosition().x - mLastCameraPosition.x, mVClouds->getCamera()->getDerivedPosition().z - mLastCameraPosition.z);
		offset -= CameraOffset.dotProduct(CameraDirection);
		mWorldOffset += CameraOffset;

		for (int k = 0; k < mNumberOfBlocks; k++)
		{
			mGeometryBlocks.at(k)->update(offset);
			mGeometryBlocks.at(k)->setWorldOffset(mWorldOffset);
		}*/
	}

  void GeometryManager::_notifyCameraChanged(Ogre::Camera* newCamera)
  {
		mSceneNode->setPosition(newCamera->getDerivedPosition().x, mHeight.x, newCamera->getDerivedPosition().z);
  }

	}
}