CSplineSegmentFunction.h

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// SPDX-License-Identifier: LGPL-2.1-or-later OR GPL-2.0-or-later OR GPL-3.0-or-later OR LicenseRef-ACF-Commercial
#pragma once
 
 
namespace imath
{
 
 
class CSplineSegmentFunction
{
public:
       // static methods
       static double GetValueKernelAt(double alpha);
       static double GetDerivativeKernelAt(double alpha);
};
 
 
// static protected inline methods
 
inline double CSplineSegmentFunction::GetValueKernelAt(double alpha)
{
       return (2 * alpha - 3) * alpha * alpha + 1;
}
 
 
inline double CSplineSegmentFunction::GetDerivativeKernelAt(double alpha)
{
       double beta = 1 - alpha;
       return alpha * beta * beta;
}
 
 
} // namespace imath