// Copyright (C) 2021 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only

#ifndef QQUICK3DPARTICLEDATA_H
#define QQUICK3DPARTICLEDATA_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 <QVector3D>
#include <private/qglobal_p.h>

QT_BEGIN_NAMESPACE

struct Color4ub {
    uchar r = 255;
    uchar g = 255;
    uchar b = 255;
    uchar a = 255;
};

struct Vector3b {
    qint8 x = 0;
    qint8 y = 0;
    qint8 z = 0;
};

// Current particle data, only used for currently modified data, so one per system
struct QQuick3DParticleDataCurrent
{
    QVector3D position;
    QVector3D velocity;
    QVector3D rotation;
    QVector3D scale;
    Color4ub color;
};

// Particle data per particle
// Not modified after emits
struct QQuick3DParticleData
{
    QVector3D startPosition;
    QVector3D startVelocity;
    QVector3D surfaceNormal;
    // Use Vector3b to reduce the memory usage, rotations work with less accuracy.
    // These need to be qint8 and not quint8 as rotations can go either direction.

    Vector3b startRotation;
    Vector3b startRotationVelocity;
    Color4ub startColor;
    // Seconds, system time when this particle was emitted
    float startTime = -1.0f;
    // Seconds, particle lifetime
    float lifetime = 0.0f;
    // Unified scaling among axes
    float startSize = 1.0f;
    float endSize = 1.0f;
    // Seconds, sprite sequence animation total time
    float animationTime = -1.0f;
    // Index/id of the particle. Used to get unique random values.
    // Might not be necessary, check later
    int index = 0;
    // Size: 12+12+3+3+4+4+4+4+4+4 = 54 bytes
    bool reversed = false;
};

// Data structure for storing bursts
struct QQuick3DParticleEmitBurstData {
    int amount = 0;
    int time = 0;
    int duration = 0;
    QVector3D position;
};

QT_END_NAMESPACE

#endif // QQUICK3DPARTICLEDATA_H