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Diffstat (limited to 'src/declarative/particles/qsgangleddirection.cpp')
-rw-r--r-- | src/declarative/particles/qsgangleddirection.cpp | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/src/declarative/particles/qsgangleddirection.cpp b/src/declarative/particles/qsgangleddirection.cpp new file mode 100644 index 0000000000..5c32b53e3e --- /dev/null +++ b/src/declarative/particles/qsgangleddirection.cpp @@ -0,0 +1,66 @@ +/**************************************************************************** +** +** 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 "qsgangleddirection_p.h" +#include <cmath> +QT_BEGIN_NAMESPACE +const qreal CONV = 0.017453292519943295; +QSGAngledDirection::QSGAngledDirection(QObject *parent) : + QSGStochasticDirection(parent) + , m_angle(0) + , m_magnitude(0) + , m_angleVariation(0) + , m_magnitudeVariation(0) +{ + +} + +const QPointF &QSGAngledDirection::sample(const QPointF &from) +{ + //TODO: Faster + qreal theta = m_angle*CONV - m_angleVariation*CONV + rand()/float(RAND_MAX) * m_angleVariation*CONV * 2; + qreal mag = m_magnitude- m_magnitudeVariation + rand()/float(RAND_MAX) * m_magnitudeVariation * 2; + m_ret.setX(mag * cos(theta)); + m_ret.setY(mag * sin(theta)); + return m_ret; +} + +QT_END_NAMESPACE |