1// Copyright (C) 2021 The Qt Company Ltd.
2// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
3
4#ifndef QQUICK3DPARTICLEGRAVITY_H
5#define QQUICK3DPARTICLEGRAVITY_H
6
7//
8// W A R N I N G
9// -------------
10//
11// This file is not part of the Qt API. It exists purely as an
12// implementation detail. This header file may change from version to
13// version without notice, or even be removed.
14//
15// We mean it.
16//
17
18#include <QObject>
19#include <QtQuick3DParticles/private/qquick3dparticleaffector_p.h>
20
21QT_BEGIN_NAMESPACE
22
23class Q_QUICK3DPARTICLES_EXPORT QQuick3DParticleGravity : public QQuick3DParticleAffector
24{
25 Q_OBJECT
26 Q_PROPERTY(float magnitude READ magnitude WRITE setMagnitude NOTIFY magnitudeChanged)
27 Q_PROPERTY(QVector3D direction READ direction WRITE setDirection NOTIFY directionChanged)
28 QML_NAMED_ELEMENT(Gravity3D)
29 QML_ADDED_IN_VERSION(6, 2)
30
31public:
32 QQuick3DParticleGravity(QQuick3DNode *parent = nullptr);
33
34 float magnitude() const;
35 const QVector3D &direction() const;
36
37public Q_SLOTS:
38 void setDirection(const QVector3D &direction);
39 void setMagnitude(float magnitude);
40
41Q_SIGNALS:
42 void magnitudeChanged();
43 void directionChanged();
44
45protected:
46 void affectParticle(const QQuick3DParticleData &sd, QQuick3DParticleDataCurrent *d, float time) override;
47
48private:
49 float m_magnitude = 100.0f;
50 QVector3D m_direction = {0.0f, -1.0f, 0.0f};
51 QVector3D m_directionNormalized = {0.0f, -1.0f, 0.0f};
52};
53
54QT_END_NAMESPACE
55
56#endif // QQUICK3DPARTICLEGRAVITY_H
57

source code of qtquick3d/src/quick3dparticles/qquick3dparticlegravity_p.h