diff options
author | Alan Alpert <alan.alpert@nokia.com> | 2011-06-07 15:12:53 +1000 |
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committer | Alan Alpert <alan.alpert@nokia.com> | 2011-06-07 15:12:53 +1000 |
commit | 21d0c6ef9a7df3e5fa69ff344e9dee2d2159c43c (patch) | |
tree | 8b9545958c1dde4e0963dd14d74faa3dab394486 /src/declarative/particles/qsgwander.cpp | |
parent | 6e22ead1767d0ef9463b34bee071ca54647a547c (diff) |
Immense Particles Refactor Part A
Qt.labs.particles 2.0 moved to QtQuick.Particles 2.0. All C++ classes
changed names, some renaming of QML types.
Also adds CustomParticle.
Diffstat (limited to 'src/declarative/particles/qsgwander.cpp')
-rw-r--r-- | src/declarative/particles/qsgwander.cpp | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/src/declarative/particles/qsgwander.cpp b/src/declarative/particles/qsgwander.cpp new file mode 100644 index 0000000000..e6787f2570 --- /dev/null +++ b/src/declarative/particles/qsgwander.cpp @@ -0,0 +1,110 @@ +/**************************************************************************** +** +** 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 "qsgwander_p.h" +#include "qsgparticlesystem_p.h"//for ParticlesVertices +QT_BEGIN_NAMESPACE + +QSGWanderAffector::QSGWanderAffector(QSGItem *parent) : + QSGParticleAffector(parent) +{ + m_needsReset = true; +} + +QSGWanderAffector::~QSGWanderAffector() +{ + for(QHash<int, WanderData*>::const_iterator iter=m_wanderData.constBegin(); + iter != m_wanderData.constEnd(); iter++) + delete (*iter); +} + +WanderData* QSGWanderAffector::getData(int idx) +{ + if(m_wanderData.contains(idx)) + return m_wanderData[idx]; + WanderData* d = new WanderData; + d->x_vel = 0; + d->y_vel = 0; + d->x_peak = m_xVariance; + d->y_peak = m_yVariance; + d->x_var = m_pace * qreal(qrand()) / RAND_MAX; + d->y_var = m_pace * qreal(qrand()) / RAND_MAX; + + m_wanderData.insert(idx, d); + return d; +} + +void QSGWanderAffector::reset(int systemIdx) +{ + if(m_wanderData.contains(systemIdx)) + delete m_wanderData[systemIdx]; + m_wanderData.remove(systemIdx); +} + +bool QSGWanderAffector::affectParticle(QSGParticleData* data, qreal dt) +{ + WanderData* d = getData(data->systemIndex); + if (m_xVariance != 0.) { + if ((d->x_vel > d->x_peak && d->x_var > 0.0) || (d->x_vel < -d->x_peak && d->x_var < 0.0)) { + d->x_var = -d->x_var; + d->x_peak = m_xVariance + m_xVariance * qreal(qrand()) / RAND_MAX; + } + d->x_vel += d->x_var * dt; + } + qreal dx = dt * d->x_vel; + + if (m_yVariance != 0.) { + if ((d->y_vel > d->y_peak && d->y_var > 0.0) || (d->y_vel < -d->y_peak && d->y_var < 0.0)) { + d->y_var = -d->y_var; + d->y_peak = m_yVariance + m_yVariance * qreal(qrand()) / RAND_MAX; + } + d->y_vel += d->y_var * dt; + } + qreal dy = dt * d->x_vel; + + //### Should we be amending vel instead? + ParticleVertex* p = &(data->pv); + p->x += dx; + + p->y += dy; + return true; +} +QT_END_NAMESPACE |