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/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the Declarative module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef PARTICLE_H
#define PARTICLE_H
#include <QObject>
#include <QDebug>
#include "qsgparticlesystem_p.h"
QT_BEGIN_HEADER
QT_BEGIN_NAMESPACE
QT_MODULE(Declarative)
class QSGParticlePainter : public QSGItem
{
Q_OBJECT
Q_PROPERTY(QSGParticleSystem* system READ system WRITE setSystem NOTIFY systemChanged)
Q_PROPERTY(QStringList particles READ particles WRITE setParticles NOTIFY particlesChanged)
public:
explicit QSGParticlePainter(QSGItem *parent = 0);
virtual void load(QSGParticleData*);
virtual void reload(QSGParticleData*);
void setCount(int c);
int count();
QSGParticleSystem* system() const
{
return m_system;
}
QStringList particles() const
{
return m_particles;
}
signals:
void countChanged();
void systemChanged(QSGParticleSystem* arg);
void particlesChanged(QStringList arg);
public slots:
void setSystem(QSGParticleSystem* arg);
void setParticles(QStringList arg)
{
if (m_particles != arg) {
m_particles = arg;
emit particlesChanged(arg);
}
}
private slots:
void calcSystemOffset();
void updateParticleStarts();
protected:
virtual void reset();
virtual void componentComplete();
QSGParticleSystem* m_system;
friend class QSGParticleSystem;
int m_count;
bool m_pleaseReset;
QStringList m_particles;
QHash<int,QPair<int, int> > m_particleStarts; //Group, size, idx
int m_lastStart;
QPointF m_systemOffset;
template <typename VertexStruct>//just convenience
void vertexCopy(VertexStruct &b, const ParticleVertex& a)
{
b.x = a.x - m_systemOffset.x();
b.y = a.y - m_systemOffset.y();
b.t = a.t;
b.lifeSpan = a.lifeSpan;
b.size = a.size;
b.endSize = a.endSize;
b.sx = a.sx;
b.sy = a.sy;
b.ax = a.ax;
b.ay = a.ay;
}
//###Abstracted primarily for code reuse. Demote to subclasses?
int particleTypeIndex(QSGParticleData*);
virtual void resize(int oldCount, int newCount);
template <typename T>
void groupShuffle(QVector<T> &v, const T& zero)//Must be called inside resize
{
//TODO: In place shuffling because it's faster
QVector<T> v0(v);
v.clear();
v.resize(m_count);
int lastStart = 0;
QList<int> particleList;
if(m_particles.isEmpty())
particleList << 0;
foreach(const QString &s, m_particles)
particleList << m_system->m_groupIds[s];
foreach(int gIdx, particleList){
QSGParticleGroupData *gd = m_system->m_groupData[gIdx];
for(int i=0; i<gd->data.size(); i++){//TODO: When group didn't exist before
int newIdx = lastStart + i;//Have to make the same way as in updateParticleStarts
if(i >= m_particleStarts[gIdx].first || v0.size() <= m_particleStarts[gIdx].second + i)
v[newIdx] = zero;
else
v[newIdx] = v0[m_particleStarts[gIdx].second + i];
}
lastStart += gd->size;
}
}
private:
};
QT_END_NAMESPACE
QT_END_HEADER
#endif // PARTICLE_H
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