source: code/trunk/src/modules/superorxobros/SOBFireball.cc @ 12332

    /*
 *   ORXONOX - the hottest 3D action shooter ever to exist
 *                    > www.orxonox.net <
 *
 *
 *   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:
 *      Theo von Arx
 *      Noah Zarro
 *   Co-authors:
 *      
 *
 */

/**
    @file SOBFireball.cc
    @brief Fireballs are the Projectile of the Fireflower Powerup
*/

#include "SOBFireball.h"

#include "core/CoreIncludes.h"
#include "core/XMLPort.h"
#include "SOBFigure.h"
#include "SOBGumba.h"
#include "SOBGumbaBoss.h"    
#include "SOB.h"    
#include "util/Output.h"
#include <BulletCollision/NarrowPhaseCollision/btManifoldPoint.h>
#include "graphics/ParticleSpawner.h"




namespace orxonox
{
    RegisterClass(SOBFireball);

    SOBFireball::SOBFireball(Context* context) : MovableEntity(context)
    {
        RegisterObject(SOBFireball);

        setAngularFactor(0.0);
        this->enableCollisionCallback();
        gravityAcceleration_ = 350.0;

        speed_ = 0;
        hasCollided_=false;
        changeAllowed_ = true;
        changedOn_ = 0.0;
        goesRight_ = true;
        hitCounter_ = 0;
        particlespawner_ = NULL ;



   

    }

    

    void SOBFireball::XMLPort(Element& xmlelement, XMLPort::Mode mode)
    {
        SUPER(SOBFireball, XMLPort, xmlelement, mode);
        XMLPortParam(SOBFireball, "speed", setSpeed, getSpeed, xmlelement, mode);


    }

    void SOBFireball::setDirection(const bool direction)
    {
        if(direction)
        {
            goesRight_=true;
        }
        else
        {
            goesRight_=false;
        }
    }

    
    bool SOBFireball::collidesAgainst(WorldEntity* otherObject, const btCollisionShape* ownCollisionShape, btManifoldPoint& contactPoint) {
        float collDisX_ = getPosition().x - contactPoint.getPositionWorldOnB().getX();
        float collDisZ_ = getPosition().z - contactPoint.getPositionWorldOnB().getZ();

        SOBGumba*       gumba       = orxonox_cast<SOBGumba*>       (otherObject);
        SOBGumbaBoss*   gumbaBoss   = orxonox_cast<SOBGumbaBoss*>   (otherObject);

        if(gumbaBoss != nullptr && !(gumba->hasCollided_))  //Fireballs can't destroy GumbaBosses, they get destroyed themselves instead
        {
            this->destroyLater();
            this->hasCollided_ = true;
        }


        if(gumba!=nullptr && gumbaBoss == nullptr && !(gumba->hasCollided_)) //if other object is a Gumba, kill the Gumba and add score and destroy the fireball
        {
            gumba->destroyLater();
            gumba->hasCollided_ = true;
            SOB* SOBGame = orxonox_cast<SOB*>(getGametype());
            SOBGame->addGumba();
            this->destroyLater();
            this->hasCollided_ = true;
        }


         //collision with either top or bottom of a block
        else if(changeAllowed_ && (abs(collDisX_)<=abs(collDisZ_)))
        {
            changeAllowed_ = false;
            Vector3 velocity = getVelocity();
            velocity.z = -velocity.z;
     

            setVelocity(velocity);
        }

        //collision with the vertical side of a block 
        else if(changeAllowed_ && (abs(collDisX_)>abs(collDisZ_))) 
        {
            changeAllowed_ = false;
            goesRight_=!goesRight_;
        }

        hitCounter_++;
        
        return true;
    }


    void SOBFireball::tick(float dt)
    {
        SUPER(SOBFireball, tick, dt);

        //the particle spawner that generates the fire from the backpack when pressed
        if (particlespawner_ == NULL) {
            for (WorldEntity* object : this->getAttachedObjects())
            {
               if (object->isA(Class(ParticleSpawner)))
                particlespawner_ = object;
            }

        }

        if(particlespawner_ != NULL)
            particlespawner_->setVisible(true);
        if (!changeAllowed_) {
            changedOn_+= dt;
            // After a collision, we don't listen for collisions for 200ms - that's because one wall can cause several collisions!
            if (changedOn_> 0.2) {
                changeAllowed_ = true;
                changedOn_ = 0.0;

            }
        
        }
            int dir = 1;
            if (!goesRight_)
                dir = -1;

            Vector3 velocity = getVelocity();
            velocity.z -= gravityAcceleration_*dt;
            velocity.x = dir*speed_;
            velocity.y = 0;
            if(hitCounter_ >= 3) velocity.y = 0.1f*speed_;
            setVelocity(velocity);

            if(abs(this->getPosition().z) > 1000) this->destroyLater();
        
    }
    


}