source: code/trunk/src/modules/weapons/projectiles/GravityBombField.h @ 11006

/*
 * GravityBombField.h
 *
 *  Created on: Apr 2, 2015
 *      Author: meggiman
 */

#ifndef GRAVITYBOMBFIELD_H_
#define GRAVITYBOMBFIELD_H_

#include "graphics/ParticleSpawner.h"
#include "interfaces/RadarViewable.h"
#include "objects/ForceField.h"
#include "BasicProjectile.h"
#include "worldentities/MovableEntity.h"
#include "core/CoreIncludes.h"
#include "GravityBomb.h"
#include "graphics/ParticleSpawner.h"
#include "tools/ParticleInterface.h"
#include <stdlib.h>
#include <time.h>
#include <math.h>
#include "graphics/Backlight.h"
#include "sound/WorldSound.h"

namespace orxonox {

/**
 * @class   GravityBombField
 *
 * @brief   This class is used by GravityBomb to place the ForceField and Visual effect to the environment.
 *          The field has a maximum lifetime and gets smaller and stronger the more time passes. In the end, the field explodes and damages all pawns nearby.
 *
 * @author  Manuel Eggimann
 * @date    23.05.2015
 */
class GravityBombField: public ForceField, public RadarViewable {
public:
    GravityBombField(Context* context);
    virtual ~GravityBombField();
    virtual void tick(float dt);
    virtual void destroy();

    /**
     * @fn  void GravityBombField::setShooter(Pawn* shooter)
     *
     * @brief   This function is used to determine save the pawn who created the field and is used inside the GravityBomb class.
     *
     * @author  Manuel Eggimann
     * @date    23.05.2015
     *
     * @param [in,out]  the Pawn that created the field.
     */
    void setShooter(Pawn* shooter)
    { this->shooter_ = shooter; }

    Pawn* getShooter()
    { return this->shooter_; }

private:
    //Set these constants inside GravityBombField.cc to alter the behaviour of the field.
    
    static const float FORCE_FIELD_LIFETIME;    ///< The lifetime of the ForceField in seconds. After lifetime seconds, has already exploded and the particle effects will start to vanish. 
    static const float FORCE_SPHERE_START_RADIUS;   ///< The initial sphere radius of the Force Field. The forcefield gets smaller by time.
    static const float FORCE_SPHERE_START_STRENGTH; ///< The initial Force the Field exerts on every object with non-zero mass.
    static const float FORCE_FIELD_EXPLOSION_DAMMAGE;   ///< The maximum dammage a pawn gets nearby an exploding field. The farer away from explosion center the smaller the dammage.
    static const float EXPLOSION_DURATION;  ///< Determines how fast the shockwave of the Explosion expands. It takes GravityBombField::EXPLOSION_DURATION seconds for the field to expand from 0 radius to GravityBombField::EXPLOSION_RADIUS.
    static const float EXPLOSION_RADIUS;    ///< How far does the shockwave reach. All pawns which outside of a sphere witch this radius rest unharmed by the explosion.
    static const float PEAK_ANGULAR_VELOCITY;   ///< The model of the bomb in the center of the Field does rotate faster and faster as time passes until it reaches PEAK_ANGULAR_VELOCITY at the fields end of life.
    static const float PEAK_EXPLOSION_FORCE;    ///< The peak force the explosion exerts on the pawns nearby.
    static const float CENTRE_MODEL_END_SIZE;   ///< Size of the 3d-model of the bomb in the fields centre.

    float forceSphereRadius_;
    float forceStrength_;
    float lifetime_;
    float modelScaling_;
    Vector3 rotationVector_;
    bool fieldExploded_;
    ParticleEmitter * particleSphere_;
    ParticleEmitter * explosionCross_;
    std::vector<Pawn*> victimsAlreadyDamaged_;
    MovableEntity * bombModel_;
    Pawn* shooter_;
    Backlight* centreLight_;
    WorldSound* explosionSound_;
};

}
#endif /* GRAVITYBOMBFIELD_H_ */