randominstancing_p.h

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// Copyright (C) 2020 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
 
//
//  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.
//
 
#ifndef RANDOMINSTANCING_P_H
#define RANDOMINSTANCING_P_H
 
#include <QtQuick3D/QQuick3DInstancing>
#include <private/qglobal_p.h>
 
QT_BEGIN_NAMESPACE
 
class QQuick3DInstanceRange : public QQuick3DObject
{
    Q_OBJECT
 
    QML_ADDED_IN_VERSION(6, 2)
    Q_PROPERTY(QVariant from READ from WRITE setFrom NOTIFY fromChanged)
    Q_PROPERTY(QVariant to READ to WRITE setTo NOTIFY toChanged)
    Q_PROPERTY(bool proportional READ proportional WRITE setProportional NOTIFY proportionalChanged)
    QML_NAMED_ELEMENT(InstanceRange)
 
public:
    explicit QQuick3DInstanceRange(QQuick3DObject *parent = nullptr);
    ~QQuick3DInstanceRange() override {}
    QVariant from() const
    {
        return m_from;
    }
    QVariant to() const
    {
        return m_to;
    }
 
    bool proportional() const
    {
        return m_proportional;
    }
 
public Q_SLOTS:
    void setFrom(QVariant from);
    void setTo(QVariant to);
    void setProportional(bool proportional);
 
Q_SIGNALS:
    void fromChanged();
    void toChanged();
    void proportionalChanged();
    void changed();
 
protected:
    QSSGRenderGraphObject *updateSpatialNode(QSSGRenderGraphObject *) override
    {
        return nullptr;
    }
private:
    QVariant m_from;
    QVariant m_to;
    bool m_proportional = false;
};
 
class QRandomGenerator;
class QQuick3DRandomInstancing : public QQuick3DInstancing
{
    Q_OBJECT
 
    Q_PROPERTY(int instanceCount READ instanceCount WRITE setInstanceCount NOTIFY instanceCountChanged)
    Q_PROPERTY(QQuick3DInstanceRange *position READ position WRITE setPosition NOTIFY positionChanged)
    Q_PROPERTY(QQuick3DInstanceRange *scale READ scale WRITE setScale NOTIFY scaleChanged)
    Q_PROPERTY(QQuick3DInstanceRange *rotation READ rotation WRITE setRotation NOTIFY rotationChanged)
    Q_PROPERTY(QQuick3DInstanceRange *color READ color WRITE setColor NOTIFY colorChanged)
    Q_PROPERTY(ColorModel colorModel READ colorModel WRITE setColorModel NOTIFY colorModelChanged)
    Q_PROPERTY(QQuick3DInstanceRange *customData READ customData WRITE setCustomData NOTIFY customDataChanged)
 
    Q_PROPERTY(int randomSeed READ randomSeed WRITE setRandomSeed NOTIFY randomSeedChanged)
 
    QML_NAMED_ELEMENT(RandomInstancing)
    QML_ADDED_IN_VERSION(6, 2)
 
public:
    enum class ColorModel { RGB, HSV, HSL };
    Q_ENUM(ColorModel)
 
    explicit QQuick3DRandomInstancing(QQuick3DObject *parent = nullptr);
    ~QQuick3DRandomInstancing();
 
    QByteArray getInstanceBuffer(int *instanceCount) override;
 
    int instanceCount() const
    {
        return m_randomCount;
    }
 
    int randomSeed() const
    {
        return m_randomSeed;
    }
 
    QQuick3DInstanceRange *position() const
    {
        return m_position;
    }
 
    QQuick3DInstanceRange* scale() const
    {
        return m_scale;
    }
 
    QQuick3DInstanceRange* rotation() const
    {
        return m_rotation;
    }
 
    QQuick3DInstanceRange* color() const
    {
        return m_color;
    }
 
    QQuick3DInstanceRange* customData() const
    {
        return m_customData;
    }
 
    ColorModel colorModel() const
    {
        return m_colorModel;
    }
 
public Q_SLOTS:
    void setInstanceCount(int instanceCount);
    void setRandomSeed(int randomSeed);
 
    void setPosition(QQuick3DInstanceRange *position);
    void setScale(QQuick3DInstanceRange *scale);
    void setRotation(QQuick3DInstanceRange *rotation);
    void setColor(QQuick3DInstanceRange *color);
    void setCustomData(QQuick3DInstanceRange *customData);
    void setColorModel(ColorModel colorModel);
 
Q_SIGNALS:
    void instanceCountChanged();
    void randomSeedChanged();
    void positionChanged();
    void scaleChanged();
    void rotationChanged();
    void colorChanged();
    void customDataChanged();
    void colorModelChanged();
 
private Q_SLOTS:
    void handleChange();
 
private:
    void generateInstanceTable();
    int m_randomCount = 0;
    int m_randomSeed = -1;
    bool m_dirty = true;
    QByteArray m_instanceData;
    QQuick3DInstanceRange *m_position = nullptr;
    QQuick3DInstanceRange *m_scale = nullptr;
    QQuick3DInstanceRange *m_rotation = nullptr;
    QQuick3DInstanceRange *m_color = nullptr;
    QQuick3DInstanceRange *m_customData = nullptr;
    ColorModel m_colorModel = ColorModel::RGB;
};
QT_END_NAMESPACE
#endif // RANDOMINSTANCING_P_H