diff options
Diffstat (limited to 'src/imports/particles/directedvector.cpp')
-rw-r--r-- | src/imports/particles/directedvector.cpp | 67 |
1 files changed, 65 insertions, 2 deletions
diff --git a/src/imports/particles/directedvector.cpp b/src/imports/particles/directedvector.cpp index 5e504e8d44..c1aeba3ad2 100644 --- a/src/imports/particles/directedvector.cpp +++ b/src/imports/particles/directedvector.cpp @@ -1,5 +1,48 @@ +/**************************************************************************** +** +** 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 "directedvector.h" +#include "particleemitter.h" #include <cmath> +#include <QDebug> QT_BEGIN_NAMESPACE DirectedVector::DirectedVector(QObject *parent) : @@ -10,14 +53,34 @@ DirectedVector::DirectedVector(QObject *parent) : , m_proportionalMagnitude(false) , m_magnitude(0) , m_magnitudeVariation(0) + , m_targetItem(0) { } const QPointF &DirectedVector::sample(const QPointF &from) { //###This approach loses interpolating the last position of the target (like we could with the emitter) is it worthwhile? - qreal targetX = m_targetX - from.x() - m_targetVariation + rand()/(float)RAND_MAX * m_targetVariation*2; - qreal targetY = m_targetY - from.y() - m_targetVariation + rand()/(float)RAND_MAX * m_targetVariation*2; + qreal targetX; + qreal targetY; + if(m_targetItem){ + ParticleEmitter* parentEmitter = qobject_cast<ParticleEmitter*>(parent()); + targetX = m_targetItem->width()/2; + targetY = m_targetItem->height()/2; + if(!parentEmitter){ + qWarning() << "Directed vector is not a child of the emitter. Mapping of target item coordinates may fail."; + targetX += m_targetItem->x(); + targetY += m_targetItem->y(); + }else{ + m_ret = parentEmitter->mapFromItem(m_targetItem, QPointF(targetX, targetY)); + targetX = m_ret.x(); + targetY = m_ret.y(); + } + }else{ + targetX = m_targetX; + targetY = m_targetY; + } + targetX += 0 - from.x() - m_targetVariation + rand()/(float)RAND_MAX * m_targetVariation*2; + targetY += 0 - from.y() - m_targetVariation + rand()/(float)RAND_MAX * m_targetVariation*2; qreal theta = atan2(targetY, targetX); qreal mag = m_magnitude + rand()/(float)RAND_MAX * m_magnitudeVariation * 2 - m_magnitudeVariation; if(m_proportionalMagnitude) |