| /**************************************************************************** |
| ** |
| ** Copyright (C) 2016 The Qt Company Ltd. |
| ** Contact: https://www.qt.io/licensing/ |
| ** |
| ** This file is part of the QtQuick module of the Qt Toolkit. |
| ** |
| ** $QT_BEGIN_LICENSE:LGPL$ |
| ** Commercial License Usage |
| ** Licensees holding valid commercial Qt licenses may use this file in |
| ** accordance with the commercial license agreement provided with the |
| ** Software or, alternatively, in accordance with the terms contained in |
| ** a written agreement between you and The Qt Company. For licensing terms |
| ** and conditions see https://www.qt.io/terms-conditions. For further |
| ** information use the contact form at https://www.qt.io/contact-us. |
| ** |
| ** GNU Lesser General Public License Usage |
| ** Alternatively, this file may be used under the terms of the GNU Lesser |
| ** General Public License version 3 as published by the Free Software |
| ** Foundation and appearing in the file LICENSE.LGPL3 included in the |
| ** packaging of this file. Please review the following information to |
| ** ensure the GNU Lesser General Public License version 3 requirements |
| ** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. |
| ** |
| ** GNU General Public License Usage |
| ** Alternatively, this file may be used under the terms of the GNU |
| ** General Public License version 2.0 or (at your option) the GNU General |
| ** Public license version 3 or any later version approved by the KDE Free |
| ** Qt Foundation. The licenses are as published by the Free Software |
| ** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 |
| ** included in the packaging of this file. Please review the following |
| ** information to ensure the GNU General Public License requirements will |
| ** be met: https://www.gnu.org/licenses/gpl-2.0.html and |
| ** https://www.gnu.org/licenses/gpl-3.0.html. |
| ** |
| ** $QT_END_LICENSE$ |
| ** |
| ****************************************************************************/ |
| |
| #include "qquickangledirection_p.h" |
| #include <QRandomGenerator> |
| #include <qmath.h> |
| |
| QT_BEGIN_NAMESPACE |
| const qreal CONV = 0.017453292519943295; |
| /*! |
| \qmltype AngleDirection |
| \instantiates QQuickAngleDirection |
| \inqmlmodule QtQuick.Particles |
| \ingroup qtquick-particles |
| \inherits Direction |
| \brief For specifying a direction that varies in angle. |
| |
| The AngledDirection element allows both the specification of a direction by angle and magnitude, |
| as well as varying the parameters by angle or magnitude. |
| */ |
| /*! |
| \qmlproperty real QtQuick.Particles::AngleDirection::angle |
| This property specifies the base angle for the direction. |
| The angle of this direction will vary by no more than angleVariation |
| from this angle. |
| |
| Angle is specified by degrees clockwise from straight right. |
| |
| The default value is zero. |
| */ |
| /*! |
| \qmlproperty real QtQuick.Particles::AngleDirection::magnitude |
| This property specifies the base magnitude for the direction. |
| The magnitude of this direction will vary by no more than magnitudeVariation |
| from this magnitude. |
| |
| Magnitude is specified in units of pixels per second. |
| |
| The default value is zero. |
| */ |
| /*! |
| \qmlproperty real QtQuick.Particles::AngleDirection::angleVariation |
| This property specifies the maximum angle variation for the direction. |
| The angle of the direction will vary by up to angleVariation clockwise |
| and anticlockwise from the value specified in angle. |
| |
| Angle is specified by degrees clockwise from straight right. |
| |
| The default value is zero. |
| */ |
| /*! |
| \qmlproperty real QtQuick.Particles::AngleDirection::magnitudeVariation |
| This property specifies the base magnitude for the direction. |
| The magnitude of this direction will vary by no more than magnitudeVariation |
| from the base magnitude. |
| |
| Magnitude is specified in units of pixels per second. |
| |
| The default value is zero. |
| */ |
| QQuickAngleDirection::QQuickAngleDirection(QObject *parent) : |
| QQuickDirection(parent) |
| , m_angle(0) |
| , m_magnitude(0) |
| , m_angleVariation(0) |
| , m_magnitudeVariation(0) |
| { |
| |
| } |
| |
| QPointF QQuickAngleDirection::sample(const QPointF &from) |
| { |
| Q_UNUSED(from); |
| QPointF ret; |
| qreal theta = m_angle*CONV - m_angleVariation*CONV + QRandomGenerator::global()->generateDouble() * m_angleVariation*CONV * 2; |
| qreal mag = m_magnitude- m_magnitudeVariation + QRandomGenerator::global()->generateDouble() * m_magnitudeVariation * 2; |
| ret.setX(mag * qCos(theta)); |
| ret.setY(mag * qSin(theta)); |
| return ret; |
| } |
| |
| QT_END_NAMESPACE |
| |
| #include "moc_qquickangledirection_p.cpp" |