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Diffstat (limited to 'src/declarative/particles/qquickpointattractor.cpp')
| -rw-r--r-- | src/declarative/particles/qquickpointattractor.cpp | 162 |
1 files changed, 0 insertions, 162 deletions
diff --git a/src/declarative/particles/qquickpointattractor.cpp b/src/declarative/particles/qquickpointattractor.cpp deleted file mode 100644 index d96458c8bb..0000000000 --- a/src/declarative/particles/qquickpointattractor.cpp +++ /dev/null @@ -1,162 +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 "qquickpointattractor_p.h" -#include <cmath> -#include <QDebug> -QT_BEGIN_NAMESPACE -/*! - \qmlclass Attractor QQuickAttractorAffector - \inqmlmodule QtQuick.Particles 2 - \inherits Affector - \brief The Attractor allows you to attract particles towards a specific point. - - Note that the size and position of this element affects which particles it affects. - The size of the point attracted to is always 0x0, and the location of that point - is specified by the pointX and pointY properties. - - Note that Attractor has the standard Item x,y,width and height properties. - Like other affectors, these represent the affected area. They - do not represent the 0x0 point which is the target of the attraction. -*/ - - -/*! - \qmlproperty real QtQuick.Particles2::PointAttractor::pointX - - The x coordinate of the attracting point. This is relative - to the x coordinate of the Attractor. -*/ -/*! - \qmlproperty real QtQuick.Particles2::PointAttractor::pointY - - The y coordinate of the attracting point. This is relative - to the y coordinate of the Attractor. -*/ -/*! - \qmlproperty real QtQuick.Particles2::PointAttractor::strength - - The pull, in units per second, to be exerted on an item one pixel away. - - Depending on how the attraction is proportionalToDistance this may have to - be very high or very low to have a reasonable effect on particles at a - distance. -*/ -/*! - \qmlproperty AffectableParameter QtQuick.Particles2::Attractor::affectedParameter - - What attribute of particles is directly affected. - \list - \o Attractor.Position - \o Attractor.Velocity - \o Attractor.Acceleration - \endlist -*/ -/*! - \qmlproperty Proportion QtQuick.Particles2::Attractor::proportionalToDistance - - How the distance from the particle to the point affects the strength of the attraction. - - \list - \o Attractor.Constant - \o Attractor.Linear - \o Attractor.InverseLinear - \o Attractor.Quadratic - \o Attractor.InverseQuadratic - \endlist -*/ - - -QQuickAttractorAffector::QQuickAttractorAffector(QQuickItem *parent) : - QQuickParticleAffector(parent), m_strength(0.0), m_x(0), m_y(0) - , m_physics(Velocity), m_proportionalToDistance(Linear) -{ -} - -bool QQuickAttractorAffector::affectParticle(QQuickParticleData *d, qreal dt) -{ - if (m_strength == 0.0) - return false; - qreal dx = m_x+m_offset.x() - d->curX(); - qreal dy = m_y+m_offset.y() - d->curY(); - qreal r = sqrt((dx*dx) + (dy*dy)); - qreal theta = atan2(dy,dx); - qreal ds = 0; - switch (m_proportionalToDistance){ - case InverseQuadratic: - ds = (m_strength / qMax<qreal>(1.,r*r)); - break; - case InverseLinear: - ds = (m_strength / qMax<qreal>(1.,r)); - break; - case Quadratic: - ds = (m_strength * qMax<qreal>(1.,r*r)); - break; - case Linear: - ds = (m_strength * qMax<qreal>(1.,r)); - break; - default: //also Constant - ds = m_strength; - } - ds *= dt; - dx = ds * cos(theta); - dy = ds * sin(theta); - qreal vx,vy; - switch (m_physics){ - case Position: - d->x = (d->x + dx); - d->y = (d->y + dy); - break; - case Acceleration: - d->setInstantaneousAX(d->ax + dx); - d->setInstantaneousAY(d->ay + dy); - break; - case Velocity: //also default - default: - vx = d->curVX(); - vy = d->curVY(); - d->setInstantaneousVX(vx + dx); - d->setInstantaneousVY(vy + dy); - } - - return true; -} -QT_END_NAMESPACE |