/*
*   ORXONOX - the hottest 3D action shooter ever to exist
*
*
*   License notice:
*
*   This program 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.
*
*   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 General Public License for more details.
*
*   You should have received a copy of the GNU General Public License
*   along with this program; if not, write to the Free Software
*   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
*
*   Author:
*      Yuning Chai
*   Co-authors:
*      ...
*
*/

/*	local coordinate system of space ship at the beginning:

			y
			+   z
			|  +
			| /
			|/
   x +------O
*/

#include <OgreOverlayManager.h>
#include <OgreOverlayElement.h>
#include <OgrePanelOverlayElement.h>
#include <OgreStringConverter.h>
#include "RadarOverlayElement.h"

namespace orxonox
{
    using namespace Ogre;

    RadarOverlayElement::RadarOverlayElement(const String& name):Ogre::PanelOverlayElement(name){
    }

    RadarOverlayElement::~RadarOverlayElement(){
    }

    void RadarOverlayElement::initialise(){
        PanelOverlayElement::initialise();
    }

    void RadarOverlayElement::initRadarOverlayElement(Real left, Real top, int dim, Ogre::OverlayContainer* container){
        dim_ = dim;
        left_ = left;
        top_ = top;
        count_ = 0;
        container_ = container;

        shipPos_ = Vector3(0.0, 0.0, 0.0);
        targetPos_ = Vector3(42.0, 42.0, 0.0);
        initialDir_ = Vector3(0.0, 0.0, 1.0);
        currentDir_ = initialDir_;
        initialOrth_ = Vector3(0.0, 1.0, 0.0);
        currentOrth_ = initialOrth_;

        alpha_ = acos((currentDir_.dotProduct(targetPos_ - shipPos_))/((targetPos_ - shipPos_).length()*currentDir_.length()));
        beta_ = acos((currentOrth_.dotProduct(targetPos_ - shipPos_))/((targetPos_ - shipPos_).length()*currentOrth_.length()));
        vec_ = currentDir_.crossProduct(currentOrth_);

        if(vec_.dotProduct(targetPos_ - shipPos_) > 0)
            right_ = true;
        else
            right_=false;

        setMetricsMode(Ogre::GMM_PIXELS);
        setPosition(left,top);
        setDimensions(dim_,dim_);
        setMaterialName("Orxonox/Radar");

        om = &Ogre::OverlayManager::getSingleton();
        point = static_cast<PanelOverlayElement*>(om->createOverlayElement("Panel", "point"));
        point->show();
        container->addChild(point);

        if (right_){
            point->setPosition(sin(beta_)*alpha_/3.5*dim_/2+dim_/2+left-2,-cos(beta_)*alpha_/3.5*dim_/2+dim_/2+top-2);
            point->setMaterialName("Orxonox/RedPoint");
            point->setDimensions(5,5);
            point->setMetricsMode(Ogre::GMM_PIXELS);
        }

        else {
            point->setPosition(-sin(beta_)*alpha_/3.5*dim_/2+dim_/2+left-2,-cos(beta_)*alpha_/3.5*dim_/2+dim_/2+top-2);
            point->setMaterialName("Orxonox/RedPoint");
            point->setDimensions(5,5);
            point->setMetricsMode(Ogre::GMM_PIXELS);
        }
    }

//    void RadarOverlayElement::setMainShipPosition(int dirX, int dirY, int dirZ, int ortX, int ortY, int ortZ){
//        dirX_=dirX;
//        dirY_=dirY;
//        dirZ_=dirZ;
//        ortX_=ortX;
//        ortY_=ortY;
//        ortZ_=ortZ;
//    }

    void RadarOverlayElement::update() {
        shipPos_ = SpaceShip::instance_s->getPosition();
        currentDir_ = SpaceShip::instance_s->getOrientation()*initialDir_; // according to beni....
    }

}