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// Copyright (C) 2022 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0+ OR GPL-3.0 WITH Qt-GPL-exception-1.0
#include "mathutils.h"
#include <QtMath>
namespace Utils::MathUtils {
/*!
Linear interpolation:
For x = x1 it returns y1.
For x = x2 it returns y2.
*/
int interpolate(int x, int x1, int x2, int y1, int y2)
{
if (x1 == x2)
return y1; // or the middle point between y1 and y2?
if (y1 == y2)
return y1;
if (x == x1)
return y1;
if (x == x2)
return y2;
const int numerator = (y2 - y1) * x + x2 * y1 - x1 * y2;
const int denominator = x2 - x1;
return qRound((double)numerator / denominator);
}
} // namespace Utils::Math
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