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/*
* Copyright (C) 2010 Bruno Abinader <bruno.abinader@indt.org.br>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#include "pendulumcurve_p.h"
/**
* This static method is used to create a custom easing curve type.
* @param progress animation progress value
* @return pendulum easing curve progress value
*/
static qreal pendulumFunction(qreal progress)
{
if (progress <= 0.25) {
progress *= 4;
} else if (progress <= 0.50) {
progress -= 0.25;
progress *= 4;
progress = 1 - progress;
} else if (progress <= 0.75) {
progress -= 0.50;
progress *= -4;
} else {
progress -= 0.75;
progress *= 4;
progress = 1 - progress;
progress *= -1;
}
return progress;
}
namespace Plasma
{
PendulumCurve::PendulumCurve()
: QEasingCurve()
{
setCustomType(pendulumFunction);
}
} // namespace Plasma
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