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Diffstat (limited to 'src/declarative/particles/qquickparticleemitter.cpp')
| -rw-r--r-- | src/declarative/particles/qquickparticleemitter.cpp | 501 |
1 files changed, 0 insertions, 501 deletions
diff --git a/src/declarative/particles/qquickparticleemitter.cpp b/src/declarative/particles/qquickparticleemitter.cpp deleted file mode 100644 index f227256f1b..0000000000 --- a/src/declarative/particles/qquickparticleemitter.cpp +++ /dev/null @@ -1,501 +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 "qquickparticleemitter_p.h" -#include <private/qdeclarativeengine_p.h> -QT_BEGIN_NAMESPACE - - -/*! - \qmlclass Emitter QQuickParticleEmitter - \inqmlmodule QtQuick.Particles 2 - \brief The Emitter element allows you to emit logical particles. - - This element emits logical particles into the ParticleSystem, with the - given starting attributes. - - Note that logical particles are not - automatically rendered, you will need to have one or more - ParticlePainter elements visualizing them. - - Note that the given starting attributes can be modified at any point - in the particle's lifetime by any Affector element in the same - ParticleSystem. This includes attributes like lifespan. -*/ - - -/*! - \qmlproperty ParticleSystem QtQuick.Particles2::Emitter::system - - This is the Particle system that the Emitter will emit into. - This can be omitted if the Emitter is a direct child of the ParticleSystem -*/ -/*! - \qmlproperty string QtQuick.Particles2::Emitter::group - - This is the logical particle group which it will emit into. - - Default value is "" (empty string). -*/ -/*! - \qmlproperty Shape QtQuick.Particles2::Emitter::shape - - This shape is applied with the size of the Emitter. Particles will be emitted - randomly from any area covered by the shape. - - The default shape is a filled in rectangle, which corresponds to the full bounding - box of the Emitter. -*/ -/*! - \qmlproperty bool QtQuick.Particles2::Emitter::emitting - - If set to false, the emitter will cease emissions until it is set to true. - - Default value is true. -*/ -/*! - \qmlproperty real QtQuick.Particles2::Emitter::emitRate - - Number of particles emitted per second. - - Default value is 10 particles per second. -*/ -/*! - \qmlproperty int QtQuick.Particles2::Emitter::lifeSpan - - The time in milliseconds each emitted particle should last for. - - If you do not want particles to automatically die after a time, for example if - you wish to dispose of them manually, set lifeSpan to Emitter.InfiniteLife. - - lifeSpans greater than or equal to 600000 (10 minutes) will be treated as infinite. - Particles with lifeSpans less than or equal to 0 will start out dead. - - Default value is 1000 (one second). -*/ -/*! - \qmlproperty int QtQuick.Particles2::Emitter::lifeSpanVariation - - Particle lifespans will vary by up to this much in either direction. - - Default value is 0. -*/ - -/*! - \qmlproperty int QtQuick.Particles2::Emitter::maximumEmitted - - The maximum number of particles at a time that this emitter will have alive. - - This can be set as a performance optimization (when using burst and pulse) or - to stagger emissions. - - If this is set to a number below zero, then there is no maximum limit on the number - of particles this emitter can have alive. - - The default value is -1. -*/ -/*! - \qmlproperty int QtQuick.Particles2::Emitter::startTime - - If this value is set when the emitter is loaded, then it will emit particles from the - past, up to startTime milliseconds ago. These will simulate as if they were emitted then, - but will not have any affectors applied to them. Affectors will take effect from the present time. -*/ -/*! - \qmlproperty real QtQuick.Particles2::Emitter::size - - The size in pixels of the particles at the start of their life. - - Default value is 16. -*/ -/*! - \qmlproperty real QtQuick.Particles2::Emitter::endSize - - The size in pixels of the particles at the end of their life. Size will - be linearly interpolated during the life of the particle from this value and - size. If endSize is -1, then the size of the particle will remain constant at - the starting size. - - Default value is -1. -*/ -/*! - \qmlproperty real QtQuick.Particles2::Emitter::sizeVariation - - The size of a particle can vary by this much up or down from size/endSize. The same - random addition is made to both size and endSize for a single particle. - - Default value is 0. -*/ -/*! - \qmlproperty StochasticDirection QtQuick.Particles2::Emitter::speed - - The starting speed of the particles emitted. -*/ -/*! - \qmlproperty StochasticDirection QtQuick.Particles2::Emitter::acceleration - - The starting acceleraton of the particles emitted. -*/ -/*! - \qmlproperty qreal QtQuick.Particles2::Emitter::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. -*/ - -/*! - \qmlsignal QtQuick.Particles2::Emitter::onEmitParticles(Array particles) - - This handler is called when particles are emitted. particles is a javascript - array of Particle objects. You can modify particle attributes directly within the handler. - - Note that JS is slower to execute, so it is not recommended to use this in - high-volume particle systems. -*/ - -/*! \qmlmethod QtQuick.Particles2::Emitter::burst(int count) - - Emits count particles from this emitter immediately. -*/ - -/*! \qmlmethod QtQuick.Particles2::Emitter::burst(int x, int y, int count) - - Emits count particles from this emitter immediately. The particles are emitted - as if the Emitter was positioned at x,y but all other properties are the same. -*/ - -/*! \qmlmethod QtQuick.Particles2::Emitter::pulse(int duration) - - If the emitter is not enabled, enables it for duration milliseconds and then switches - it back off. -*/ - -QQuickParticleEmitter::QQuickParticleEmitter(QQuickItem *parent) : - QQuickItem(parent) - , m_particlesPerSecond(10) - , m_particleDuration(1000) - , m_particleDurationVariation(0) - , m_enabled(true) - , m_system(0) - , m_extruder(0) - , m_defaultExtruder(0) - , m_speed(&m_nullVector) - , m_acceleration(&m_nullVector) - , m_particleSize(16) - , m_particleEndSize(-1) - , m_particleSizeVariation(0) - , m_startTime(0) - , m_overwrite(true) - , m_pulseLeft(0) - , m_maxParticleCount(-1) - , m_speed_from_movement(0) - , m_reset_last(true) - , m_last_timestamp(-1) - , m_last_emission(0) - -{ - //TODO: Reset speed/acc back to null vector? Or allow null pointer? - connect(this, SIGNAL(maximumEmittedChanged(int)), - this, SIGNAL(particleCountChanged())); - connect(this, SIGNAL(particlesPerSecondChanged(qreal)), - this, SIGNAL(particleCountChanged())); - connect(this, SIGNAL(particleDurationChanged(int)), - this, SIGNAL(particleCountChanged())); -} - -QQuickParticleEmitter::~QQuickParticleEmitter() -{ - if (m_defaultExtruder) - delete m_defaultExtruder; -} - -bool QQuickParticleEmitter::isEmitConnected() -{ - static int idx = QObjectPrivate::get(this)->signalIndex("emitParticles(QDeclarativeV8Handle)"); - return QObjectPrivate::get(this)->isSignalConnected(idx); -} - -void QQuickParticleEmitter::componentComplete() -{ - if (!m_system && qobject_cast<QQuickParticleSystem*>(parentItem())) - setSystem(qobject_cast<QQuickParticleSystem*>(parentItem())); - QQuickItem::componentComplete(); -} - -void QQuickParticleEmitter::setEnabled(bool arg) -{ - if (m_enabled != arg) { - m_enabled = arg; - emit enabledChanged(arg); - } -} - - -QQuickParticleExtruder* QQuickParticleEmitter::effectiveExtruder() -{ - if (m_extruder) - return m_extruder; - if (!m_defaultExtruder) - m_defaultExtruder = new QQuickParticleExtruder; - return m_defaultExtruder; -} - -void QQuickParticleEmitter::pulse(int milliseconds) -{ - if (!particleCount()) - qWarning() << "pulse called on an emitter with a particle count of zero"; - if (!m_enabled) - m_pulseLeft = milliseconds; -} - -void QQuickParticleEmitter::burst(int num) -{ - if (!particleCount()) - qWarning() << "burst called on an emitter with a particle count of zero"; - m_burstQueue << qMakePair(num, QPointF(x(), y())); -} - -void QQuickParticleEmitter::burst(int num, qreal x, qreal y) -{ - if (!particleCount()) - qWarning() << "burst called on an emitter with a particle count of zero"; - m_burstQueue << qMakePair(num, QPointF(x, y)); -} - -void QQuickParticleEmitter::setMaxParticleCount(int arg) -{ - if (m_maxParticleCount != arg) { - if (arg < 0 && m_maxParticleCount >= 0){ - connect(this, SIGNAL(particlesPerSecondChanged(qreal)), - this, SIGNAL(particleCountChanged())); - connect(this, SIGNAL(particleDurationChanged(int)), - this, SIGNAL(particleCountChanged())); - }else if (arg >= 0 && m_maxParticleCount < 0){ - disconnect(this, SIGNAL(particlesPerSecondChanged(qreal)), - this, SIGNAL(particleCountChanged())); - disconnect(this, SIGNAL(particleDurationChanged(int)), - this, SIGNAL(particleCountChanged())); - } - m_overwrite = arg < 0; - m_maxParticleCount = arg; - emit maximumEmittedChanged(arg); - } -} - -int QQuickParticleEmitter::particleCount() const -{ - if (m_maxParticleCount >= 0) - return m_maxParticleCount; - return m_particlesPerSecond*((m_particleDuration+m_particleDurationVariation)/1000.0); -} - -void QQuickParticleEmitter::setSpeedFromMovement(qreal t) -{ - if (t == m_speed_from_movement) - return; - m_speed_from_movement = t; - emit speedFromMovementChanged(); -} - -void QQuickParticleEmitter::reset() -{ - m_reset_last = true; -} - -void QQuickParticleEmitter::emitWindow(int timeStamp) -{ - if (m_system == 0) - return; - if ((!m_enabled || !m_particlesPerSecond)&& !m_pulseLeft && m_burstQueue.isEmpty()){ - m_reset_last = true; - return; - } - - if (m_reset_last) { - m_last_emitter = m_last_last_emitter = QPointF(x(), y()); - if (m_last_timestamp == -1) - m_last_timestamp = (timeStamp - m_startTime)/1000.; - else - m_last_timestamp = timeStamp/1000.; - m_last_emission = m_last_timestamp; - m_reset_last = false; - m_emitCap = particleCount(); - } - - if (m_pulseLeft){ - m_pulseLeft -= timeStamp - m_last_timestamp * 1000.; - if (m_pulseLeft < 0){ - if (!m_enabled) - timeStamp += m_pulseLeft; - m_pulseLeft = 0; - } - } - qreal time = timeStamp / 1000.; - qreal particleRatio = 1. / m_particlesPerSecond; - qreal pt = m_last_emission; - qreal maxLife = (m_particleDuration + m_particleDurationVariation)/1000.0; - if (pt + maxLife < time)//We missed so much, that we should skip emiting particles that are dead by now - pt = time - maxLife; - - qreal opt = pt; // original particle time - qreal dt = time - m_last_timestamp; // timestamp delta... - if (!dt) - dt = 0.000001; - - // emitter difference since last... - qreal dex = (x() - m_last_emitter.x()); - qreal dey = (y() - m_last_emitter.y()); - - qreal ax = (m_last_last_emitter.x() + m_last_emitter.x()) / 2; - qreal bx = m_last_emitter.x(); - qreal cx = (x() + m_last_emitter.x()) / 2; - qreal ay = (m_last_last_emitter.y() + m_last_emitter.y()) / 2; - qreal by = m_last_emitter.y(); - qreal cy = (y() + m_last_emitter.y()) / 2; - - qreal sizeAtEnd = m_particleEndSize >= 0 ? m_particleEndSize : m_particleSize; - qreal emitter_x_offset = m_last_emitter.x() - x(); - qreal emitter_y_offset = m_last_emitter.y() - y(); - if (!m_burstQueue.isEmpty() && !m_pulseLeft && !m_enabled)//'outside time' emissions only - pt = time; - - QList<QQuickParticleData*> toEmit; - - while ((pt < time && m_emitCap) || !m_burstQueue.isEmpty()) { - //int pos = m_last_particle % m_particle_count; - QQuickParticleData* datum = m_system->newDatum(m_system->groupIds[m_group], !m_overwrite); - if (datum){//actually emit(otherwise we've been asked to skip this one) - datum->e = this;//###useful? - qreal t = 1 - (pt - opt) / dt; - qreal vx = - - 2 * ax * (1 - t) - + 2 * bx * (1 - 2 * t) - + 2 * cx * t; - qreal vy = - - 2 * ay * (1 - t) - + 2 * by * (1 - 2 * t) - + 2 * cy * t; - - - // Particle timestamp - datum->t = pt; - datum->lifeSpan = - (m_particleDuration - + ((rand() % ((m_particleDurationVariation*2) + 1)) - m_particleDurationVariation)) - / 1000.0; - - if (datum->lifeSpan >= m_system->maxLife){ - datum->lifeSpan = m_system->maxLife; - m_emitCap--;//emitCap keeps us from reemitting 'infinite' particles after their life. Unless you reset the emitter. - } - - // Particle position - QRectF boundsRect; - if (!m_burstQueue.isEmpty()){ - boundsRect = QRectF(m_burstQueue.first().second.x() - x(), m_burstQueue.first().second.y() - y(), - width(), height()); - } else { - boundsRect = QRectF(emitter_x_offset + dex * (pt - opt) / dt, emitter_y_offset + dey * (pt - opt) / dt - , width(), height()); - } - QPointF newPos = effectiveExtruder()->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 * vx; - datum->vy = speed.y() - + m_speed_from_movement * 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_emitting); - datum->endSize = endSize;// * float(m_emitting); - - toEmit << datum; - } - if (m_burstQueue.isEmpty()){ - pt += particleRatio; - }else{ - m_burstQueue.first().first--; - if (m_burstQueue.first().first <= 0) - m_burstQueue.pop_front(); - } - } - - if (isEmitConnected()) { - 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()); - - emitParticles(QDeclarativeV8Handle::fromHandle(array));//A chance for arbitrary JS changes - } - foreach (QQuickParticleData* d, toEmit) - m_system->emitParticle(d); - - m_last_emission = pt; - - m_last_last_last_emitter = m_last_last_emitter; - m_last_last_emitter = m_last_emitter; - m_last_emitter = QPointF(x(), y()); - m_last_timestamp = time; -} - - -QT_END_NAMESPACE |