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Diffstat (limited to 'src/imports/particles/swarmaffector.cpp')
-rw-r--r-- | src/imports/particles/swarmaffector.cpp | 114 |
1 files changed, 0 insertions, 114 deletions
diff --git a/src/imports/particles/swarmaffector.cpp b/src/imports/particles/swarmaffector.cpp deleted file mode 100644 index 513e8a17a7..0000000000 --- a/src/imports/particles/swarmaffector.cpp +++ /dev/null @@ -1,114 +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. -** -** $QT_BEGIN_LICENSE:LGPL$ -** 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 "swarmaffector.h" -#include "particle.h" -#include <cmath> -#include <QDebug> -QT_BEGIN_NAMESPACE - -SwarmAffector::SwarmAffector(QSGItem *parent) : - ParticleAffector(parent), m_strength(1), m_inited(false) -{ - connect(this, SIGNAL(leadersChanged(QStringList)), - this, SLOT(updateGroupList())); -} - -void SwarmAffector::ensureInit() -{ - if(m_inited) - return; - m_inited = true; - updateGroupList(); - m_lastPos.resize(m_system->count()); -} - -const qreal epsilon = 0.0000001; -bool SwarmAffector::affectParticle(ParticleData *d, qreal dt) -{ - ensureInit(); - QPointF curPos(d->curX(), d->curY()); - if(m_leaders.isEmpty() || m_leadGroups.contains(d->group)){ - m_lastPos[d->systemIndex] = curPos; - if(m_leadGroups.contains(d->group)) - return false; - } - - qreal fx = 0.0; - qreal fy = 0.0; - for(int i=0; i < m_lastPos.count(); i++){ - if(m_lastPos[i].isNull()) - continue; - QPointF diff = m_lastPos[i] - curPos; - qreal r = sqrt(diff.x() * diff.x() + diff.y() * diff.y()); - if(r == 0.0) - continue; - qreal f = m_strength * (1/r); - if(f < epsilon) - continue; - qreal theta = atan2(diff.y(), diff.x()); - fx += cos(theta) * f; - fy += sin(theta) * f; - } - if(!fx && !fy) - return false; - d->setInstantaneousSX(d->curSX()+fx * dt); - d->setInstantaneousSY(d->curSY()+fy * dt); - return true; -} - -void SwarmAffector::reset(int systemIdx) -{ - if(!m_system) - return; - if(!m_lastPos[systemIdx].isNull()) - m_lastPos[systemIdx] = QPointF(); -} - -void SwarmAffector::updateGroupList() -{ - if(!m_system || !m_system->m_initialized) - return; - m_leadGroups.clear(); - foreach(const QString &s, m_leaders) - m_leadGroups << m_system->m_groupIds[s]; -} -QT_END_NAMESPACE |