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<h1>qwt_spline.h</h1><pre class="fragment"><div>00001 <span class="comment">/* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************</span>
00002 <span class="comment"> * Qwt Widget Library</span>
00003 <span class="comment"> * Copyright (C) 1997 Josef Wilgen</span>
00004 <span class="comment"> * Copyright (C) 2002 Uwe Rathmann</span>
00005 <span class="comment"> * </span>
00006 <span class="comment"> * This library is free software; you can redistribute it and/or</span>
00007 <span class="comment"> * modify it under the terms of the Qwt License, Version 1.0</span>
00008 <span class="comment"> *****************************************************************************/</span>
00009
00010 <span class="preprocessor">#ifndef QWT_SPLINE_H</span>
00011 <span class="preprocessor"></span><span class="preprocessor">#define QWT_SPLINE_H</span>
00012 <span class="preprocessor"></span>
00013 <span class="preprocessor">#include "qwt_array.h"</span>
00014 <span class="preprocessor">#include "qwt_global.h"</span>
00015
<a name="l00063"></a><a class="code" href="class_qwt_spline.html">00063</a> <span class="keyword">class </span>QWT_EXPORT QwtSpline
00064 {
00065 <span class="keyword">public</span>:
00066 QwtSpline();
00067 ~QwtSpline();
00068
00069 <span class="keywordtype">double</span> value(<span class="keywordtype">double</span> x) <span class="keyword">const</span>;
00070 <span class="keywordtype">int</span> recalc(<span class="keywordtype">double</span> *x, <span class="keywordtype">double</span> *y, <span class="keywordtype">int</span> n, <span class="keywordtype">int</span> periodic = 0);
00071 <span class="keywordtype">int</span> recalc(<span class="keyword">const</span> QwtArray<double> &x, <span class="keyword">const</span> QwtArray<double> &y,
00072 <span class="keywordtype">int</span> periodic = 0);
00073 <span class="keywordtype">void</span> copyValues(<span class="keywordtype">int</span> tf = 1);
00074
00075 <span class="keyword">private</span>:
00076 <span class="keywordtype">int</span> buildPerSpline();
00077 <span class="keywordtype">int</span> buildNatSpline();
00078 <span class="keywordtype">int</span> lookup(<span class="keywordtype">double</span> x) <span class="keyword">const</span>;
00079 <span class="keywordtype">void</span> cleanup();
00080
00081 <span class="comment">// coefficient vectors</span>
00082 <span class="keywordtype">double</span> *d_a;
00083 <span class="keywordtype">double</span> *d_b;
00084 <span class="keywordtype">double</span> *d_c;
00085 <span class="keywordtype">double</span> *d_d;
00086
00087 <span class="comment">// values</span>
00088 <span class="keywordtype">double</span> *d_x;
00089 <span class="keywordtype">double</span> *d_y;
00090 <span class="keywordtype">double</span> *d_xbuffer;
00091 <span class="keywordtype">double</span> *d_ybuffer;
00092 <span class="keywordtype">int</span> d_size;
00093
00094 <span class="comment">//flags</span>
00095 <span class="keywordtype">int</span> d_buffered;
00096 };
00097
00098
00099
00100
00101
00102 <span class="preprocessor">#endif</span>
00103 <span class="preprocessor"></span>
00104
00105
00106
00107
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