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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
#include "star.h"
#include <QtCore/qmath.h>
Star::Star()
: m_theta(0),
m_a(0),
m_b(0),
m_center(QVector2D(0.0f, 0.0f))
{
}
const void Star::calcXY()
{
qreal &a = m_a;
qreal &b = m_b;
qreal &theta = m_theta;
const QVector2D &p = m_center;
qreal beta = -m_angle;
qreal alpha = qDegreesToRadians(theta);
// temporaries to save cpu time
qreal cosalpha = qCos(alpha);
qreal sinalpha = qSin(alpha);
qreal cosbeta = qCos(beta);
qreal sinbeta = qSin(beta);
m_pos = QVector2D(p.x() + (a * cosalpha * cosbeta - b * sinalpha * sinbeta),
p.y() + (a * cosalpha * sinbeta + b * sinalpha * cosbeta));
}
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