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/****************************************************************************
**
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the Qt scene graph research project.
**
** $QT_BEGIN_LICENSE:LGPL$
** 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 "qxclipnode_p.h"
#include "utilities.h"
#include <QtCore/qmath.h>
QxClipNode::QxClipNode(const QRectF &rect)
: m_rect(rect), m_radius(0)
{
updateGeometry();
setFlag(ClipIsRectangular, true);
}
void QxClipNode::setRect(const QRectF &rect)
{
m_rect = rect;
updateGeometry();
}
void QxClipNode::setRadius(qreal radius)
{
m_radius = radius;
updateGeometry();
setFlag(ClipIsRectangular, radius == 0);
}
void QxClipNode::updateGeometry()
{
if (qFuzzyIsNull(m_radius)) {
updateGeometryDescription(Utilities::getRectGeometryDescription(), GL_UNSIGNED_SHORT);
Utilities::setupRectGeometry(geometry(), m_rect);
} else {
// ### Fix.
updateGeometryDescription(Utilities::getRectGeometryDescription(), GL_UNSIGNED_SHORT);
Utilities::setupRectGeometry(geometry(), m_rect);
/*
//XXX copy of what is in QxRectangle (we should reuse the geometry generated there if possible)
QRectF rect = m_rect;
qreal radius = m_radius;
QArray<QVector2D> vertices;
QGLVertexBuffer v;
qreal zero = 0. * M_PI/180.;
qreal ninety = 90. * M_PI/180.;
qreal oneeighty = 180. * M_PI/180.;
qreal twoseventy = 270. * M_PI/180.;
qreal nninety = -90. * M_PI/180.;
qreal step = -1.5708/radius;
//upper left
QPointF cp(rect.x() + radius, rect.y() + radius);
for (qreal angle = twoseventy; angle >= oneeighty; angle += step) {
vertices.append(QVector2D(cp.x() + qFastSin(angle) * radius, cp.y() + qFastCos(angle) * radius));
}
//upper right
cp = QPointF(rect.x() + rect.width() - radius, rect.y() + radius);
for (qreal angle = oneeighty; angle >= ninety; angle += step) {
vertices.append(QVector2D(cp.x() + qFastSin(angle) * radius, cp.y() + qFastCos(angle) * radius));
}
//lower right
cp = QPointF(rect.x() + rect.width() - radius, rect.y() + rect.height() - radius);
for (qreal angle = ninety; angle >= zero; angle += step) {
vertices.append(QVector2D(cp.x() + qFastSin(angle) * radius, cp.y() + qFastCos(angle) * radius));
}
//lower left
cp = QPointF(rect.x() + radius, rect.y() + rect.height() - radius);
for (qreal angle = zero; angle >= nninety; angle += step) {
vertices.append(QVector2D(cp.x() + qFastSin(angle) * radius, cp.y() + qFastCos(angle) * radius));
}
vertices.append(QVector2D(rect.x(), rect.y() + radius));
v.addAttribute(QGL::Position, vertices);
setDrawingMode(QGL::TriangleFan);
setVertexBuffer(v);
setIndexBuffer(Utilities::createIndexBuffer(vertices.count()));
*/
}
setBoundingRect(m_rect);
}
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