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/*****************************************************************************/
// Copyright 2006-2007 Adobe Systems Incorporated
// All Rights Reserved.
//
// NOTICE: Adobe permits you to use, modify, and distribute this file in
// accordance with the terms of the Adobe license agreement accompanying it.
/*****************************************************************************/
/* $Id: //mondo/dng_sdk_1_4/dng_sdk/source/dng_spline.h#1 $ */
/* $DateTime: 2012/05/30 13:28:51 $ */
/* $Change: 832332 $ */
/* $Author: tknoll $ */
/*****************************************************************************/
#ifndef __dng_spline__
#define __dng_spline__
/*****************************************************************************/
#include "dng_1d_function.h"
#include "dng_memory.h"
#include <vector>
/*****************************************************************************/
inline real64 EvaluateSplineSegment (real64 x,
real64 x0,
real64 y0,
real64 s0,
real64 x1,
real64 y1,
real64 s1)
{
real64 A = x1 - x0;
real64 B = (x - x0) / A;
real64 C = (x1 - x) / A;
real64 D = ((y0 * (2.0 - C + B) + (s0 * A * B)) * (C * C)) +
((y1 * (2.0 - B + C) - (s1 * A * C)) * (B * B));
return D;
}
/*****************************************************************************/
class dng_spline_solver: public dng_1d_function
{
protected:
dng_std_vector<real64> X;
dng_std_vector<real64> Y;
dng_std_vector<real64> S;
public:
dng_spline_solver ();
virtual ~dng_spline_solver ();
void Reset ();
void Add (real64 x, real64 y);
virtual void Solve ();
virtual bool IsIdentity () const;
virtual real64 Evaluate (real64 x) const;
};
/*****************************************************************************/
#endif
/*****************************************************************************/
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