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