qquick3dparticlelineparticle_p.h

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// Copyright (C) 2022 The Qt Company Ltd.

// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only

// Qt-Security score:significant reason:default

#ifndef QQUICK3DPARTICLELINEPARTICLE_H

#define QQUICK3DPARTICLELINEPARTICLE_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 <QtQuick3DParticles/private/qquick3dparticlespriteparticle_p.h>

QT_BEGIN_NAMESPACE

class Q_QUICK3DPARTICLES_EXPORT QQuick3DParticleLineParticle : public QQuick3DParticleSpriteParticle

    Q_OBJECT

    Q_PROPERTY(int segmentCount READ segmentCount WRITE setSegmentCount NOTIFY segmentCountChanged)

    Q_PROPERTY(float alphaFade READ alphaFade WRITE setAlphaFade NOTIFY alphaFadeChanged)

    Q_PROPERTY(float scaleMultiplier READ scaleMultiplier WRITE setScaleMultiplier NOTIFY scaleMultiplierChanged)

    Q_PROPERTY(float texcoordMultiplier READ texcoordMultiplier WRITE setTexcoordMultiplier NOTIFY texcoordMultiplierChanged)

    Q_PROPERTY(float length READ length WRITE setLength NOTIFY lengthChanged)

    Q_PROPERTY(float lengthVariation READ lengthVariation WRITE setLengthVariation NOTIFY lengthVariationChanged)

    Q_PROPERTY(float lengthDeltaMin READ lengthDeltaMin WRITE setLengthDeltaMin NOTIFY lengthDeltaMinChanged)

    Q_PROPERTY(int eolFadeOutDuration READ eolFadeOutDuration WRITE setEolFadeOutDuration NOTIFY eolFadeOutDurationChanged)

    Q_PROPERTY(TexcoordMode texcoordMode READ texcoordMode WRITE setTexcoordMode NOTIFY texcoordModeChanged)

    QML_NAMED_ELEMENT(LineParticle3D)

    QML_ADDED_IN_VERSION(6, 4)

public:

    enum TexcoordMode

        Absolute,

        Relative,

        Fill,

};

    Q_ENUM(TexcoordMode)

    QQuick3DParticleLineParticle(QQuick3DNode *parent = nullptr);

    ~QQuick3DParticleLineParticle() override;

    int segmentCount() const;

    float alphaFade() const;

    float scaleMultiplier() const;

    float texcoordMultiplier() const;

    float length() const;

    float lengthVariation() const;

    float lengthDeltaMin() const;

    int eolFadeOutDuration() const;

    TexcoordMode texcoordMode() const;

public Q_SLOTS:

    void setSegmentCount(int count);

    void setAlphaFade(float fade);

    void setScaleMultiplier(float multiplier);

    void setTexcoordMultiplier(float multiplier);

    void setLength(float length);

    void setLengthVariation(float length);

    void setLengthDeltaMin(float min);

    void setEolFadeOutDuration(int duration);

    void setTexcoordMode(QQuick3DParticleLineParticle::TexcoordMode mode);

Q_SIGNALS:

    void segmentCountChanged();

    void alphaFadeChanged();

    void scaleMultiplierChanged();

    void texcoordMultiplierChanged();

    void lengthChanged();

    void lengthVariationChanged();

    void lengthDeltaMinChanged();

    void eolFadeOutDurationChanged();

    void texcoordModeChanged();

private:

    struct LineDataHeader

        int emitterIndex = -1;

        int pointCount = 0;

        int currentIndex = 0;

        float length = 0.0f;

};

    struct LineData

        QVector3D position;

        QVector3D normal;

        QVector4D color;

        QVector3D tangent;

        QVector3D binormal;

        float size = 0.0f;

        float length = 0.0f;

};

    struct FadeOutLineData

        int emitterIndex;

        SpriteParticleData endPoint;

        LineDataHeader header;

        QVector<LineData> lineData;

        float beginTime;

        float endTime;

        float timeFactor;

};

    friend class QQuick3DParticleSystem;

    class LineParticleUpdateNode : public ParticleUpdateNode

    public:

        LineParticleUpdateNode(QQuick3DNode *parent = nullptr)

            : ParticleUpdateNode(parent)

        QSSGRenderGraphObject *updateSpatialNode(QSSGRenderGraphObject *node) override;

};

    void updateLineBuffer(LineParticleUpdateNode *updateNode, QSSGRenderGraphObject *node);

    QSSGRenderGraphObject *updateLineNode(QSSGRenderGraphObject *node);

    void handleSegmentCountChanged();

    void updateLineSegment(int particleIndex);

    void clearSegment(int particleIndex);

    void handleMaxAmountChanged(int amount) override;

    void handleSystemChanged(QQuick3DParticleSystem *system) override;

    void reset() override;

    void commitParticles(float time) override;

    int nextCurrentIndex(const QQuick3DParticleEmitter *emitter) override;

    void saveLineSegment(int particleIndex, float time);

    void setParticleData(int particleIndex,

                         const QVector3D &position,

                         const QVector3D &rotation,

                         const QVector4D &color,

                         float size, float age,

                         float animationFrame) override;

    void resetParticleData(int particleIndex) override;

    QVector<LineDataHeader> m_lineHeaderData;

    QVector<LineData> m_lineData;

    QVector<FadeOutLineData> m_fadeOutData;

    float m_alphaFade = 0.0f;

    float m_scaleMultiplier = 1.0f;

    float m_texcoordMultiplier = 1.0f;

    float m_lengthDeltaMin = 10.0f;

    float m_length = -1.0f;

    float m_lengthVariation = 0.0f;

    int m_segmentCount = 1;

    int m_eolFadeOutDuration = 0;

    TexcoordMode m_texcoordMode = TexcoordMode::Absolute;

};

QT_END_NAMESPACE

#endif