qquick3dparticlevectordirection.cpp

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// Copyright (C) 2021 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
 
#include "qquick3dparticlevectordirection_p.h"
#include "qquick3dparticlerandomizer_p.h"
#include "qquick3dparticlesystem_p.h"
 
QT_BEGIN_NAMESPACE
 
QQuick3DParticleVectorDirection::QQuick3DParticleVectorDirection(QObject *parent)
    : QQuick3DParticleDirection(parent)
{
}
 
QVector3D QQuick3DParticleVectorDirection::direction() const
{
    return m_direction;
}
 
QVector3D QQuick3DParticleVectorDirection::directionVariation() const
{
    return m_directionVariation;
}
 
bool QQuick3DParticleVectorDirection::normalized() const
{
    return m_normalized;
}
 
void QQuick3DParticleVectorDirection::setDirection(const QVector3D &direction)
{
    if (m_direction == direction)
        return;
 
    m_direction = direction;
    Q_EMIT directionChanged();
}
 
void QQuick3DParticleVectorDirection::setDirectionVariation(const QVector3D &directionVariation)
{
    if (m_directionVariation == directionVariation)
        return;
 
    m_directionVariation = directionVariation;
    Q_EMIT directionVariationChanged();
}
 
void QQuick3DParticleVectorDirection::setNormalized(bool normalized)
{
    if (m_normalized == normalized)
        return;
 
    m_normalized = normalized;
    Q_EMIT normalizedChanged();
}
 
QVector3D QQuick3DParticleVectorDirection::sample(const QQuick3DParticleData &d)
{
    QVector3D ret;
    if (!m_system)
        return ret;
    auto rand = m_system->rand();
    ret.setX(m_direction.x() - m_directionVariation.x() + rand->get(d.index, QPRand::VDirXV) * m_directionVariation.x() * 2.0f);
    ret.setY(m_direction.y() - m_directionVariation.y() + rand->get(d.index, QPRand::VDirYV) * m_directionVariation.y() * 2.0f);
    ret.setZ(m_direction.z() - m_directionVariation.z() + rand->get(d.index, QPRand::VDirZV) * m_directionVariation.z() * 2.0f);
    if (m_normalized)
        ret = m_direction.length() * ret.normalized();
    return ret;
}
 
QT_END_NAMESPACE