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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#ifndef TURBULENCEAFFECTOR_H
#define TURBULENCEAFFECTOR_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists purely as an
// implementation detail. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
#include "qquickparticleaffector_p.h"
#include <QQmlListProperty>
QT_BEGIN_NAMESPACE
class QQuickParticlePainter;
class Q_QUICKPARTICLES_EXPORT QQuickTurbulenceAffector : public QQuickParticleAffector
{
Q_OBJECT
Q_PROPERTY(qreal strength READ strength WRITE setStrength NOTIFY strengthChanged)
Q_PROPERTY(QUrl noiseSource READ noiseSource WRITE setNoiseSource NOTIFY noiseSourceChanged)
QML_NAMED_ELEMENT(Turbulence)
QML_ADDED_IN_VERSION(2, 0)
public:
explicit QQuickTurbulenceAffector(QQuickItem *parent = nullptr);
~QQuickTurbulenceAffector();
void affectSystem(qreal dt) override;
qreal strength() const
{
return m_strength;
}
QUrl noiseSource() const
{
return m_noiseSource;
}
Q_SIGNALS:
void strengthChanged(qreal arg);
void noiseSourceChanged(const QUrl &arg);
public Q_SLOTS:
void setStrength(qreal arg)
{
if (m_strength != arg) {
m_strength = arg;
Q_EMIT strengthChanged(arg);
}
}
void setNoiseSource(const QUrl &arg)
{
if (m_noiseSource != arg) {
m_noiseSource = arg;
Q_EMIT noiseSourceChanged(arg);
initializeGrid();
}
}
protected:
void geometryChange(const QRectF &newGeometry, const QRectF &oldGeometry) override;
private:
void ensureInit();
void mapUpdate();
void initializeGrid();
qreal boundsRespectingField(int x, int y);
qreal m_strength;
int m_gridSize;
qreal** m_field;
QPointF** m_vectorField;
bool m_inited;
QUrl m_noiseSource;
};
QT_END_NAMESPACE
#endif // TURBULENCEAFFECTOR_H