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-rw-r--r--src/imports/particles/followemitter.cpp195
1 files changed, 0 insertions, 195 deletions
diff --git a/src/imports/particles/followemitter.cpp b/src/imports/particles/followemitter.cpp
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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.
-**
-**
-**
-**
-**
-**
-**
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-#include "followemitter.h"
-#include "particle.h"
-#include <cmath>
-QT_BEGIN_NAMESPACE
-
-FollowEmitter::FollowEmitter(QSGItem *parent) :
- ParticleEmitter(parent)
- , m_particlesPerParticlePerSecond(0)
- , m_lastTimeStamp(0)
- , m_emitterXVariation(0)
- , m_emitterYVariation(0)
- , m_followCount(0)
- , m_emissionExtruder(0)
- , m_defaultEmissionExtruder(new ParticleExtruder(this))
-{
- connect(this, SIGNAL(followChanged(QString)),
- this, SLOT(recalcParticlesPerSecond()));
- connect(this, SIGNAL(particleDurationChanged(int)),
- this, SLOT(recalcParticlesPerSecond()));
- connect(this, SIGNAL(particlesPerParticlePerSecondChanged(int)),
- this, SLOT(recalcParticlesPerSecond()));
-}
-
-void FollowEmitter::recalcParticlesPerSecond(){
- if(!m_system)
- return;
- m_followCount = m_system->m_groupData[m_system->m_groupIds[m_follow]]->size;
- if(!m_followCount){
- setParticlesPerSecond(1000);//XXX: Fix this horrendous hack, needed so they aren't turned off from start (causes crashes - test that when gone you don't crash with 0 PPPS)
- }else{
- setParticlesPerSecond(m_particlesPerParticlePerSecond * m_followCount);
- m_lastEmission.resize(m_followCount);
- m_lastEmission.fill(0);
- }
-}
-
-void FollowEmitter::reset()
-{
- m_followCount = 0;
-}
-
-void FollowEmitter::emitWindow(int timeStamp)
-{
- if (m_system == 0)
- return;
- if(!m_emitting && !m_burstLeft && m_burstQueue.isEmpty())
- return;
- if(m_followCount != m_system->m_groupData[m_system->m_groupIds[m_follow]]->size){
- qreal oldPPS = m_particlesPerSecond;
- recalcParticlesPerSecond();
- if(m_particlesPerSecond != oldPPS)
- return;//system may need to update
- }
-
- if(m_burstLeft){
- m_burstLeft -= timeStamp - m_lastTimeStamp * 1000.;
- if(m_burstLeft < 0){
- timeStamp += m_burstLeft;
- m_burstLeft = 0;
- }
- }
-
- qreal time = timeStamp / 1000.;
- qreal particleRatio = 1. / m_particlesPerParticlePerSecond;
- qreal pt;
-
- //Have to map it into this system, because particlesystem automaps it back
- QPointF offset = m_system->mapFromItem(this, QPointF(0, 0));
- qreal sizeAtEnd = m_particleEndSize >= 0 ? m_particleEndSize : m_particleSize;
-
- int gId = m_system->m_groupIds[m_follow];
- int gId2 = m_system->m_groupIds[m_particle];
- for(int i=0; i<m_system->m_groupData[gId]->size; i++){
- pt = m_lastEmission[i];
- ParticleData* d = m_system->m_data[i + m_system->m_groupData[gId]->start];
- if(!d || !d->stillAlive())
- continue;
- if(pt < d->pv.t)
- pt = d->pv.t;
-
- if(!effectiveExtruder()->contains(QRectF(offset.x(), offset.y(), width(), height()),QPointF(d->curX(), d->curY()))){
- m_lastEmission[i] = time;//jump over this time period without emitting, because it's outside
- continue;
- }
- while(pt < time || !m_burstQueue.isEmpty()){
- ParticleData* datum = m_system->newDatum(gId2);
- if(datum){//else, skip this emission
- datum->e = this;//###useful?
- ParticleVertex &p = datum->pv;
-
- // Particle timestamp
- p.t = pt;
- p.lifeSpan =
- (m_particleDuration
- + ((rand() % ((m_particleDurationVariation*2) + 1)) - m_particleDurationVariation))
- / 1000.0;
-
- // Particle position
- // Note that burst location doesn't get used for follow emitter
- qreal followT = pt - d->pv.t;
- qreal followT2 = followT * followT * 0.5;
- qreal sizeOffset = d->pv.size/2;//TODO: Current size? As an option
- //TODO: Set variations
- //Subtract offset, because PS expects this in emitter coordinates
- QRectF boundsRect(d->pv.x - offset.x() + d->pv.sx * followT + d->pv.ax * followT2 - m_emitterXVariation/2,
- d->pv.y - offset.y() + d->pv.sy * followT + d->pv.ay * followT2 - m_emitterYVariation/2,
- m_emitterXVariation,
- m_emitterYVariation);
- // QRectF boundsRect(d->pv.x + d->pv.sx * followT + d->pv.ax * followT2 + offset.x() - sizeOffset,
- // d->pv.y + d->pv.sy * followT + d->pv.ay * followT2 + offset.y() - sizeOffset,
- // sizeOffset*2,
- // sizeOffset*2);
-
- ParticleExtruder* effectiveEmissionExtruder = m_emissionExtruder ? m_emissionExtruder : m_defaultEmissionExtruder;
- const QPointF &newPos = effectiveEmissionExtruder->extrude(boundsRect);
- p.x = newPos.x();
- p.y = newPos.y();
-
- // Particle speed
- const QPointF &speed = m_speed->sample(newPos);
- p.sx = speed.x();
- p.sy = speed.y();
-
- // Particle acceleration
- const QPointF &accel = m_acceleration->sample(newPos);
- p.ax = accel.x();
- p.ay = accel.y();
-
- // Particle size
- float sizeVariation = -m_particleSizeVariation
- + rand() / float(RAND_MAX) * m_particleSizeVariation * 2;
-
- float size = qMax((qreal)0.0, m_particleSize + sizeVariation);
- float endSize = qMax((qreal)0.0, sizeAtEnd + sizeVariation);
-
- p.size = size * float(m_emitting);
- p.endSize = endSize * float(m_emitting);
-
- m_system->emitParticle(datum);
- }
- if(!m_burstQueue.isEmpty()){
- m_burstQueue.first().first--;
- if(m_burstQueue.first().first <= 0)
- m_burstQueue.pop_front();
- }else{
- pt += particleRatio;
- }
- }
- m_lastEmission[i] = pt;
- }
-
- m_lastTimeStamp = time;
-}
-QT_END_NAMESPACE
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