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