TrailGroup.hpp

/*
 * Stellarium
 * Copyright (C) 2010 Fabien Chereau
 *
 * 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 TRAILGROUP_HPP
#define TRAILGROUP_HPP

#include "VecMath.hpp"
#include "StelCore.hpp"
#include "StelObjectType.hpp"

class StelPainter;

class TrailGroup
{
public:
    TrailGroup(float atimeExtent);

    void draw(StelCore* core, StelPainter*);

    // Add 1 point to all the curves at current time and suppress too old points
    void update();

    // Set the matrix to use to post process J2000 positions before storing in the trail
    void setJ2000ToTrailNative(const Mat4d& m);

    void addObject(const StelObjectP&, const Vec3f* col=NULL);

    void setOpacity(float op) {opacity=op;}

    void reset();

private:
    class Trail
    {
    public:
        Trail(const StelObjectP& obj, const Vec3f& col) : stelObject(obj), color(col) {;}
        StelObjectP stelObject;
        // All previous positions
        QList<Vec3d> posHistory;
        Vec3f color;
    };

    QList<Trail> allTrails;

    // Maximum time extent in days
    float timeExtent;

    QList<float> times;

    Mat4d j2000ToTrailNative;
    Mat4d j2000ToTrailNativeInverted;

    float opacity;
};

#endif // TRAILMGR_HPP