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#ifndef GRAVITYAFFECTOR_H
#define GRAVITYAFFECTOR_H
#include "qsgparticleaffector_p.h"

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

QT_MODULE(Declarative)


class QSGGravityAffector : public QSGParticleAffector
{
    Q_OBJECT
    Q_PROPERTY(qreal acceleration READ acceleration WRITE setAcceleration NOTIFY accelerationChanged)
    Q_PROPERTY(qreal angle READ angle WRITE setAngle NOTIFY angleChanged)
public:
    explicit QSGGravityAffector(QSGItem *parent = 0);
    qreal acceleration() const
    {
        return m_acceleration;
    }

    qreal angle() const
    {
        return m_angle;
    }
protected:
    virtual bool affectParticle(QSGParticleData *d, qreal dt);
signals:

    void accelerationChanged(qreal arg);

    void angleChanged(qreal arg);

public slots:
void setAcceleration(qreal arg)
{
    if (m_acceleration != arg) {
        m_acceleration = arg;
        emit accelerationChanged(arg);
    }
}

void setAngle(qreal arg)
{
    if (m_angle != arg) {
        m_angle = arg;
        emit angleChanged(arg);
    }
}

private slots:
    void recalc();
private:
    qreal m_acceleration;
    qreal m_angle;

    qreal m_xAcc;
    qreal m_yAcc;
};

QT_END_NAMESPACE
QT_END_HEADER
#endif // GRAVITYAFFECTOR_H