Meteor.hpp

/*
 * Stellarium
 * Copyright (C) 2014-2015 Marcos Cardinot
 * 
 * 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, Suite 500, Boston, MA  02110-1335, USA.
 */

#ifndef _METEOR_HPP_
#define _METEOR_HPP_

#include "StelTextureTypes.hpp"
#include "VecMath.hpp"

#include <QList>
#include <QPair>

class StelCore;
class StelPainter;

#define EARTH_RADIUS 6378.f          
#define EARTH_RADIUS2 40678884.f     
#define MAX_ALTITUDE 120.f           
#define MIN_ALTITUDE 80.f            

class Meteor
{
public:
    typedef QPair<QString, int> ColorPair;

    Meteor(const StelCore* core, const StelTextureSP &bolideTexture);
    virtual ~Meteor();

    void init(const float& radiantAlpha, const float& radiantDelta,
          const float& speed, const QList<ColorPair> colors);

    virtual bool update(double deltaTime);
    
    virtual void draw(const StelCore* core, StelPainter& sPainter);

    bool isAlive() { return m_alive; }
    void setAbsMag(float mag) { m_absMag = mag; }
    float absMag() { return m_absMag; }

private:
    void buildColorVectors(const QList<ColorPair> colors);

    Vec4f getColorFromName(QString colorName);

    void calculateThickness(const StelCore* core, float &thickness, float &bolideSize);

    void drawBolide(StelPainter &sPainter, const float &bolideSize);

    void drawTrain(StelPainter& sPainter, const float &thickness);

    float meteorZ(float zenithAngle, float altitude);

    Vec3d radiantToAltAz(Vec3d position);

    Vec3d altAzToRadiant(Vec3d position);

    const StelCore* m_core;         

    bool m_alive;                   
    float m_speed;                  
    Mat4d m_matAltAzToRadiant;      
    Vec3d m_position;               
    Vec3d m_posTrain;               
    float m_initialZ;               
    float m_finalZ;                 
    float m_minDist;                
    float m_absMag;                 
    float m_aptMag;                 

    StelTextureSP m_bolideTexture;  
    const int m_segments;           
    QVector<Vec4f> m_trainColorVector;
    QVector<Vec4f> m_lineColorVector;
};

#endif // _METEOR_HPP_