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Diffstat (limited to 'src/declarative/particles/qquicktrailemitter.cpp')
| -rw-r--r-- | src/declarative/particles/qquicktrailemitter.cpp | 285 |
1 files changed, 0 insertions, 285 deletions
diff --git a/src/declarative/particles/qquicktrailemitter.cpp b/src/declarative/particles/qquicktrailemitter.cpp deleted file mode 100644 index 272a3ebf84..0000000000 --- a/src/declarative/particles/qquicktrailemitter.cpp +++ /dev/null @@ -1,285 +0,0 @@ -/**************************************************************************** -** -** 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. -** -** $QT_BEGIN_LICENSE:LGPL$ -** GNU Lesser General Public License Usage -** 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. -** -** GNU General Public License Usage -** Alternatively, this file may be used under the terms of the GNU General -** Public License version 3.0 as published by the Free Software Foundation -** and appearing in the file LICENSE.GPL included in the packaging of this -** file. Please review the following information to ensure the GNU General -** Public License version 3.0 requirements will be met: -** http://www.gnu.org/copyleft/gpl.html. -** -** Other Usage -** Alternatively, this file may be used in accordance with the terms and -** conditions contained in a signed written agreement between you and Nokia. -** -** -** -** -** -** $QT_END_LICENSE$ -** -****************************************************************************/ - -#include "qquicktrailemitter_p.h" -#include <private/qdeclarativeengine_p.h> -#include <cmath> -QT_BEGIN_NAMESPACE - -/*! - \qmlclass TrailEmitter QQuickTrailEmitter - \inqmlmodule QtQuick.Particles 2 - \inherits QQuickParticleEmitter - \brief The TrailEmitter element allows you to emit logical particles from other logical particles. - - This element emits logical particles into the ParticleSystem, with the - starting positions based on those of other logical particles. -*/ -QQuickTrailEmitter::QQuickTrailEmitter(QQuickItem *parent) : - QQuickParticleEmitter(parent) - , m_particlesPerParticlePerSecond(0) - , m_lastTimeStamp(0) - , m_emitterXVariation(0) - , m_emitterYVariation(0) - , m_followCount(0) - , m_emissionExtruder(0) - , m_defaultEmissionExtruder(new QQuickParticleExtruder(this)) -{ - //TODO: If followed increased their size - connect(this, SIGNAL(followChanged(QString)), - this, SLOT(recalcParticlesPerSecond())); - connect(this, SIGNAL(particleDurationChanged(int)), - this, SLOT(recalcParticlesPerSecond())); - connect(this, SIGNAL(particlesPerParticlePerSecondChanged(int)), - this, SLOT(recalcParticlesPerSecond())); -} - -/*! - \qmlproperty string QtQuick.Particles2::TrailEmitter::follow - - The type of logical particle which this is emitting from. -*/ -/*! - \qmlproperty qreal QtQuick.Particles2::TrailEmitter::speedFromMovement - - If this value is non-zero, then any movement of the emitter will provide additional - starting velocity to the particles based on the movement. The additional vector will be the - same angle as the emitter's movement, with a magnitude that is the magnitude of the emitters - movement multiplied by speedFromMovement. - - Default value is 0. -*/ -/*! - \qmlproperty Shape QtQuick.Particles2::TrailEmitter::emitShape - - As the area of a TrailEmitter is the area it follows, a separate shape can be provided - to be the shape it emits out of. This shape has width and height specified by emitWidth - and emitHeight, and is centered on the followed particle's position. - - The default shape is a filled Rectangle. -*/ -/*! - \qmlproperty real QtQuick.Particles2::TrailEmitter::emitWidth - - The width in pixels the emitShape is scaled to. If set to TrailEmitter.ParticleSize, - the width will be the current size of the particle being followed. - - Default is 0. -*/ -/*! - \qmlproperty real QtQuick.Particles2::TrailEmitter::emitHeight - - The height in pixels the emitShape is scaled to. If set to TrailEmitter.ParticleSize, - the height will be the current size of the particle being followed. - - Default is 0. -*/ -/*! - \qmlproperty real QtQuick.Particles2::TrailEmitter::emitRatePerParticle -*/ -/*! - \qmlsignal QtQuick.Particles2::TrailEmitter::emitFollowParticles(Array particles, real followed) - - This handler is called when particles are emitted from the \a followed particle. \a particles contains an array of particle objects which can be directly manipulated. - - If you use this signal handler, emitParticles will not be emitted. - -*/ - -bool QQuickTrailEmitter::isEmitFollowConnected() -{ - static int idx = QObjectPrivate::get(this)->signalIndex("emitFollowParticles(QDeclarativeV8Handle,QDeclarativeV8Handle)"); - return QObjectPrivate::get(this)->isSignalConnected(idx); -} - -void QQuickTrailEmitter::recalcParticlesPerSecond(){ - if (!m_system) - return; - m_followCount = m_system->groupData[m_system->groupIds[m_follow]]->size(); - if (!m_followCount){ - setParticlesPerSecond(1);//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(m_lastTimeStamp); - } -} - -void QQuickTrailEmitter::reset() -{ - m_followCount = 0; -} - -void QQuickTrailEmitter::emitWindow(int timeStamp) -{ - if (m_system == 0) - return; - if (!m_enabled && !m_pulseLeft && m_burstQueue.isEmpty()) - return; - if (m_followCount != m_system->groupData[m_system->groupIds[m_follow]]->size()){ - qreal oldPPS = m_particlesPerSecond; - recalcParticlesPerSecond(); - if (m_particlesPerSecond != oldPPS) - return;//system may need to update - } - - if (m_pulseLeft){ - m_pulseLeft -= timeStamp - m_lastTimeStamp * 1000.; - if (m_pulseLeft < 0){ - timeStamp += m_pulseLeft; - m_pulseLeft = 0; - } - } - - //TODO: Implement startTime and speedFromMovement - qreal time = timeStamp / 1000.; - qreal particleRatio = 1. / m_particlesPerParticlePerSecond; - qreal pt; - qreal maxLife = (m_particleDuration + m_particleDurationVariation)/1000.0; - - //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->groupIds[m_follow]; - int gId2 = m_system->groupIds[m_group]; - for (int i=0; i<m_system->groupData[gId]->data.count(); i++) { - QQuickParticleData *d = m_system->groupData[gId]->data[i]; - if (!d->stillAlive()){ - m_lastEmission[i] = time; //Should only start emitting when it returns to life - continue; - } - pt = m_lastEmission[i]; - if (pt < d->t) - pt = d->t; - if (pt + maxLife < time)//We missed so much, that we should skip emiting particles that are dead by now - pt = time - maxLife; - - if ((width() || height()) && !effectiveExtruder()->contains(QRectF(offset.x(), offset.y(), width(), height()),QPointF(d->curX(), d->curY()))){ - m_lastEmission[d->index] = time;//jump over this time period without emitting, because it's outside - continue; - } - - QList<QQuickParticleData*> toEmit; - - while (pt < time || !m_burstQueue.isEmpty()){ - QQuickParticleData* datum = m_system->newDatum(gId2, !m_overwrite); - if (datum){//else, skip this emission - datum->e = this;//###useful? - - // Particle timestamp - datum->t = pt; - datum->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->t; - qreal followT2 = followT * followT * 0.5; - qreal eW = m_emitterXVariation < 0 ? d->curSize() : m_emitterXVariation; - qreal eH = m_emitterYVariation < 0 ? d->curSize() : m_emitterYVariation; - //Subtract offset, because PS expects this in emitter coordinates - QRectF boundsRect(d->x - offset.x() + d->vx * followT + d->ax * followT2 - eW/2, - d->y - offset.y() + d->vy * followT + d->ay * followT2 - eH/2, - eW, eH); - - QQuickParticleExtruder* effectiveEmissionExtruder = m_emissionExtruder ? m_emissionExtruder : m_defaultEmissionExtruder; - const QPointF &newPos = effectiveEmissionExtruder->extrude(boundsRect); - datum->x = newPos.x(); - datum->y = newPos.y(); - - // Particle speed - const QPointF &speed = m_speed->sample(newPos); - datum->vx = speed.x() - + m_speed_from_movement * d->vx; - datum->vy = speed.y() - + m_speed_from_movement * d->vy; - - // Particle acceleration - const QPointF &accel = m_acceleration->sample(newPos); - datum->ax = accel.x(); - datum->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); - - datum->size = size * float(m_enabled); - datum->endSize = endSize * float(m_enabled); - - toEmit << datum; - - 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; - } - } - - if (isEmitConnected() || isEmitFollowConnected()) { - v8::HandleScope handle_scope; - v8::Context::Scope scope(QDeclarativeEnginePrivate::getV8Engine(qmlEngine(this))->context()); - v8::Handle<v8::Array> array = v8::Array::New(toEmit.size()); - for (int i=0; i<toEmit.size(); i++) - array->Set(i, toEmit[i]->v8Value().toHandle()); - - if (isEmitFollowConnected()) - emitFollowParticles(QDeclarativeV8Handle::fromHandle(array), d->v8Value());//A chance for many arbitrary JS changes - else if (isEmitConnected()) - emitParticles(QDeclarativeV8Handle::fromHandle(array));//A chance for arbitrary JS changes - } - foreach (QQuickParticleData* d, toEmit) - m_system->emitParticle(d); - m_lastEmission[d->index] = pt; - } - - m_lastTimeStamp = time; -} -QT_END_NAMESPACE |