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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html><head><meta http-equiv="Content-Type" content="text/html;charset=iso-8859-1"><title>Qwt User's Guide: qwt_curve_fitter.cpp Source File</title><link href="doxygen.css" rel="stylesheet" type="text/css"><link href="tabs.css" rel="stylesheet" type="text/css"></head><body><!-- Generated by Doxygen 1.4.6 --><div class="tabs"> <ul> <li><a href="index.html"><span>Main Page</span></a></li> <li><a href="classes.html"><span>Classes</span></a></li> <li id="current"><a href="files.html"><span>Files</span></a></li> <li><a href="pages.html"><span>Related Pages</span></a></li> </ul></div><h1>qwt_curve_fitter.cpp</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************</span><a name="l00002"></a>00002 <span class="comment"> * Qwt Widget Library</span><a name="l00003"></a>00003 <span class="comment"> * Copyright (C) 1997 Josef Wilgen</span><a name="l00004"></a>00004 <span class="comment"> * Copyright (C) 2002 Uwe Rathmann</span><a name="l00005"></a>00005 <span class="comment"> * </span><a name="l00006"></a>00006 <span class="comment"> * This library is free software; you can redistribute it and/or</span><a name="l00007"></a>00007 <span class="comment"> * modify it under the terms of the Qwt License, Version 1.0</span><a name="l00008"></a>00008 <span class="comment"> *****************************************************************************/</span><a name="l00009"></a>00009 <a name="l00010"></a>00010 <span class="preprocessor">#include "qwt_math.h"</span><a name="l00011"></a>00011 <span class="preprocessor">#include "qwt_spline.h"</span><a name="l00012"></a>00012 <span class="preprocessor">#include "qwt_curve_fitter.h"</span><a name="l00013"></a>00013 <a name="l00015"></a><a class="code" href="class_qwt_curve_fitter.html#d804660017ae0f3ede604470724b3df3">00015</a> <a class="code" href="class_qwt_curve_fitter.html#d804660017ae0f3ede604470724b3df3">QwtCurveFitter::QwtCurveFitter</a>()<a name="l00016"></a>00016 {<a name="l00017"></a>00017 }<a name="l00018"></a>00018 <a name="l00020"></a><a class="code" href="class_qwt_curve_fitter.html#62919f309f0441d94adea94573d0f778">00020</a> <a class="code" href="class_qwt_curve_fitter.html#62919f309f0441d94adea94573d0f778">QwtCurveFitter::~QwtCurveFitter</a>()<a name="l00021"></a>00021 {<a name="l00022"></a>00022 }<a name="l00023"></a>00023 <a name="l00024"></a>00024 <span class="keyword">class </span>QwtSplineCurveFitter::PrivateData<a name="l00025"></a>00025 {<a name="l00026"></a>00026 <span class="keyword">public</span>:<a name="l00027"></a>00027 PrivateData():<a name="l00028"></a>00028 <a class="code" href="class_qwt_spline_curve_fitter.html#473468f2151839f3290975f6b18f1c4f">fitMode</a>(<a class="code" href="class_qwt_spline_curve_fitter.html">QwtSplineCurveFitter</a>::Auto),<a name="l00029"></a>00029 <a class="code" href="class_qwt_spline_curve_fitter.html#09e5cb291c90db0aa8e6e51377bc9308">splineSize</a>(250)<a name="l00030"></a>00030 {<a name="l00031"></a>00031 }<a name="l00032"></a>00032 <a name="l00033"></a>00033 <a class="code" href="class_qwt_spline.html">QwtSpline</a> <a class="code" href="class_qwt_spline_curve_fitter.html#7e5211e9e84df705d8bbbc7a57fbfa6d">spline</a>;<a name="l00034"></a>00034 <a class="code" href="class_qwt_spline_curve_fitter.html#8c5e6858f885b5691c30092a950879a8">QwtSplineCurveFitter::FitMode</a> <a class="code" href="class_qwt_spline_curve_fitter.html#473468f2151839f3290975f6b18f1c4f">fitMode</a>;<a name="l00035"></a>00035 <span class="keywordtype">int</span> <a class="code" href="class_qwt_spline_curve_fitter.html#09e5cb291c90db0aa8e6e51377bc9308">splineSize</a>;<a name="l00036"></a>00036 };<a name="l00037"></a>00037 <a name="l00038"></a><a class="code" href="class_qwt_spline_curve_fitter.html#98ae80240b254df85dcc44e1f3e4e830">00038</a> <a class="code" href="class_qwt_spline_curve_fitter.html#98ae80240b254df85dcc44e1f3e4e830">QwtSplineCurveFitter::QwtSplineCurveFitter</a>()<a name="l00039"></a>00039 {<a name="l00040"></a>00040 d_data = <span class="keyword">new</span> PrivateData;<a name="l00041"></a>00041 }<a name="l00042"></a>00042 <a name="l00043"></a><a class="code" href="class_qwt_spline_curve_fitter.html#933ecbf859698978104d0dd4ec2a2f6a">00043</a> <a class="code" href="class_qwt_spline_curve_fitter.html#933ecbf859698978104d0dd4ec2a2f6a">QwtSplineCurveFitter::~QwtSplineCurveFitter</a>()<a name="l00044"></a>00044 {<a name="l00045"></a>00045 <span class="keyword">delete</span> d_data;<a name="l00046"></a>00046 }<a name="l00047"></a>00047 <a name="l00048"></a><a class="code" href="class_qwt_spline_curve_fitter.html#8381be57ee16b5a2bdacafbd5d71908b">00048</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_spline_curve_fitter.html#8381be57ee16b5a2bdacafbd5d71908b">QwtSplineCurveFitter::setFitMode</a>(<a class="code" href="class_qwt_spline_curve_fitter.html#8c5e6858f885b5691c30092a950879a8">FitMode</a> mode)<a name="l00049"></a>00049 {<a name="l00050"></a>00050 d_data->fitMode = mode;<a name="l00051"></a>00051 }<a name="l00052"></a>00052 <a name="l00053"></a><a class="code" href="class_qwt_spline_curve_fitter.html#473468f2151839f3290975f6b18f1c4f">00053</a> <a class="code" href="class_qwt_spline_curve_fitter.html#8c5e6858f885b5691c30092a950879a8">QwtSplineCurveFitter::FitMode</a> <a class="code" href="class_qwt_spline_curve_fitter.html#473468f2151839f3290975f6b18f1c4f">QwtSplineCurveFitter::fitMode</a>()<span class="keyword"> const</span><a name="l00054"></a>00054 <span class="keyword"></span>{<a name="l00055"></a>00055 <span class="keywordflow">return</span> d_data->fitMode;<a name="l00056"></a>00056 }<a name="l00057"></a>00057 <a name="l00058"></a><a class="code" href="class_qwt_spline_curve_fitter.html#7f819ad010b19d58179655e4ceb1c6f1">00058</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_spline_curve_fitter.html#7f819ad010b19d58179655e4ceb1c6f1">QwtSplineCurveFitter::setSpline</a>(<span class="keyword">const</span> <a class="code" href="class_qwt_spline.html">QwtSpline</a> &spline)<a name="l00059"></a>00059 {<a name="l00060"></a>00060 d_data->spline = <a class="code" href="class_qwt_spline_curve_fitter.html#7e5211e9e84df705d8bbbc7a57fbfa6d">spline</a>;<a name="l00061"></a>00061 d_data->spline.reset();<a name="l00062"></a>00062 }<a name="l00063"></a>00063 <a name="l00064"></a><a class="code" href="class_qwt_spline_curve_fitter.html#7e5211e9e84df705d8bbbc7a57fbfa6d">00064</a> <span class="keyword">const</span> <a class="code" href="class_qwt_spline.html">QwtSpline</a> &<a class="code" href="class_qwt_spline_curve_fitter.html#7e5211e9e84df705d8bbbc7a57fbfa6d">QwtSplineCurveFitter::spline</a>()<span class="keyword"> const</span><a name="l00065"></a>00065 <span class="keyword"></span>{<a name="l00066"></a>00066 <span class="keywordflow">return</span> d_data->spline;<a name="l00067"></a>00067 }<a name="l00068"></a>00068 <a name="l00069"></a><a class="code" href="class_qwt_spline_curve_fitter.html#c501260a25953e1ded6bbc84c3250fa8">00069</a> <a class="code" href="class_qwt_spline.html">QwtSpline</a> &<a class="code" href="class_qwt_spline_curve_fitter.html#7e5211e9e84df705d8bbbc7a57fbfa6d">QwtSplineCurveFitter::spline</a>() <a name="l00070"></a>00070 {<a name="l00071"></a>00071 <span class="keywordflow">return</span> d_data->spline;<a name="l00072"></a>00072 }<a name="l00073"></a>00073 <a name="l00074"></a><a class="code" href="class_qwt_spline_curve_fitter.html#8ecea80fb540b92cd22b6b0703636460">00074</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_spline_curve_fitter.html#8ecea80fb540b92cd22b6b0703636460">QwtSplineCurveFitter::setSplineSize</a>(<span class="keywordtype">int</span> splineSize)<a name="l00075"></a>00075 {<a name="l00076"></a>00076 d_data->splineSize = qwtMax(splineSize, 10);<a name="l00077"></a>00077 }<a name="l00078"></a>00078 <a name="l00079"></a><a class="code" href="class_qwt_spline_curve_fitter.html#09e5cb291c90db0aa8e6e51377bc9308">00079</a> <span class="keywordtype">int</span> <a class="code" href="class_qwt_spline_curve_fitter.html#09e5cb291c90db0aa8e6e51377bc9308">QwtSplineCurveFitter::splineSize</a>()<span class="keyword"> const</span><a name="l00080"></a>00080 <span class="keyword"></span>{<a name="l00081"></a>00081 <span class="keywordflow">return</span> d_data->splineSize;<a name="l00082"></a>00082 }<a name="l00083"></a>00083 <a name="l00084"></a>00084 <span class="preprocessor">#if QT_VERSION < 0x040000</span><a name="l00085"></a>00085 <span class="preprocessor"></span>QwtArray<QwtDoublePoint> <a class="code" href="class_qwt_spline_curve_fitter.html#14d64180d7777d0cd9c2adf81e120140">QwtSplineCurveFitter::fitCurve</a>(<a name="l00086"></a>00086 <span class="keyword">const</span> QwtArray<QwtDoublePoint> & points) <span class="keyword">const</span><a name="l00087"></a>00087 <span class="preprocessor">#else</span><a name="l00088"></a><a class="code" href="class_qwt_spline_curve_fitter.html#14d64180d7777d0cd9c2adf81e120140">00088</a> <span class="preprocessor"></span>QPolygonF <a class="code" href="class_qwt_spline_curve_fitter.html#14d64180d7777d0cd9c2adf81e120140">QwtSplineCurveFitter::fitCurve</a>(<a name="l00089"></a>00089 <span class="keyword">const</span> QPolygonF &points) <span class="keyword">const</span><a name="l00090"></a>00090 <span class="preprocessor">#endif</span><a name="l00091"></a>00091 <span class="preprocessor"></span>{<a name="l00092"></a>00092 <span class="keyword">const</span> <span class="keywordtype">int</span> size = (int)points.size();<a name="l00093"></a>00093 <span class="keywordflow">if</span> ( size <= 2 )<a name="l00094"></a>00094 <span class="keywordflow">return</span> points;<a name="l00095"></a>00095 <a name="l00096"></a>00096 <a class="code" href="class_qwt_spline_curve_fitter.html#8c5e6858f885b5691c30092a950879a8">FitMode</a> fitMode = d_data->fitMode;<a name="l00097"></a>00097 <span class="keywordflow">if</span> ( fitMode == Auto )<a name="l00098"></a>00098 {<a name="l00099"></a>00099 fitMode = Spline;<a name="l00100"></a>00100 <a name="l00101"></a>00101 <span class="keyword">const</span> QwtDoublePoint *p = points.data();<a name="l00102"></a>00102 <span class="keywordflow">for</span> ( <span class="keywordtype">int</span> i = 1; i < size; i++ )<a name="l00103"></a>00103 {<a name="l00104"></a>00104 <span class="keywordflow">if</span> ( p[i].x() <= p[i-1].x() )<a name="l00105"></a>00105 {<a name="l00106"></a>00106 fitMode = ParametricSpline;<a name="l00107"></a>00107 <span class="keywordflow">break</span>;<a name="l00108"></a>00108 }<a name="l00109"></a>00109 };⌨️ 快捷键说明
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