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doxygen="_cgi:http://www.nevrax.org/cgi-bin/nel-search.cgi" href="http://www.nevrax.org/cgi-bin/nel-search.cgi">Search</a> </center> +<hr><h1>value_smoother.cpp</h1><a href="value__smoother_8cpp.html">Go to the documentation of this file.</a><div class="fragment"><pre>00001 +00007 <font class="comment">/* Copyright, 2001 Nevrax Ltd.</font> +00008 <font class="comment"> *</font> +00009 <font class="comment"> * This file is part of NEVRAX NEL.</font> +00010 <font class="comment"> * NEVRAX NEL is free software; you can redistribute it and/or modify</font> +00011 <font class="comment"> * it under the terms of the GNU General Public License as published by</font> +00012 <font class="comment"> * the Free Software Foundation; either version 2, or (at your option)</font> +00013 <font class="comment"> * any later version.</font> +00014 <font class="comment"></font> +00015 <font class="comment"> * NEVRAX NEL is distributed in the hope that it will be useful, but</font> +00016 <font class="comment"> * WITHOUT ANY WARRANTY; without even the implied warranty of</font> +00017 <font class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU</font> +00018 <font class="comment"> * General Public License for more details.</font> +00019 <font class="comment"></font> +00020 <font class="comment"> * You should have received a copy of the GNU General Public License</font> +00021 <font class="comment"> * along with NEVRAX NEL; see the file COPYING. If not, write to the</font> +00022 <font class="comment"> * Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,</font> +00023 <font class="comment"> * MA 02111-1307, USA.</font> +00024 <font class="comment"> */</font> +00025 +00026 <font class="preprocessor">#include "<a class="code" href="stdmisc_8h.html">stdmisc.h</a>"</font> +00027 +00028 <font class="preprocessor">#include "<a class="code" href="value__smoother_8h.html">nel/misc/value_smoother.h</a>"</font> +00029 +00030 +00031 <font class="keyword">using</font> <font class="keyword">namespace </font>std; +00032 +00033 +00034 <font class="keyword">namespace </font>NLMISC +00035 { +00036 +00037 +<a name="l00038"></a><a class="code" href="classNLMISC_1_1CValueSmoother.html#a0">00038</a> CValueSmoother::CValueSmoother(uint n) +00039 { +00040 <a class="code" href="debug_8h.html#a6">nlassert</a>(n!=0); +00041 <a class="code" href="classNLMISC_1_1CValueSmoother.html#a1">init</a>(n); +00042 } +00043 +<a name="l00044"></a><a class="code" href="classNLMISC_1_1CValueSmoother.html#a2">00044</a> <font class="keywordtype">void</font> CValueSmoother::reset() +00045 { +00046 fill(<a class="code" href="classNLMISC_1_1CValueSmoother.html#o0">_LastFrames</a>.begin(), <a class="code" href="classNLMISC_1_1CValueSmoother.html#o0">_LastFrames</a>.end(), 0); +00047 +00048 <a class="code" href="classNLMISC_1_1CValueSmoother.html#o1">_CurFrame</a>= 0; +00049 <a class="code" href="classNLMISC_1_1CValueSmoother.html#o2">_NumFrame</a>= 0; +00050 <a class="code" href="classNLMISC_1_1CValueSmoother.html#o3">_FrameSum</a>= 0; +00051 } +00052 +<a name="l00053"></a><a class="code" href="classNLMISC_1_1CValueSmoother.html#a1">00053</a> <font class="keywordtype">void</font> CValueSmoother::init(uint n) +00054 { +00055 <a class="code" href="debug_8h.html#a6">nlassert</a>(n!=0); +00056 +00057 <font class="comment">// reset all the array to 0.</font> +00058 <a class="code" href="classNLMISC_1_1CValueSmoother.html#o0">_LastFrames</a>.clear(); +00059 <a class="code" href="classNLMISC_1_1CValueSmoother.html#o0">_LastFrames</a>.resize(n, 0); +00060 +00061 <a class="code" href="classNLMISC_1_1CValueSmoother.html#o1">_CurFrame</a>= 0; +00062 <a class="code" href="classNLMISC_1_1CValueSmoother.html#o2">_NumFrame</a>= 0; +00063 <a class="code" href="classNLMISC_1_1CValueSmoother.html#o3">_FrameSum</a>= 0; +00064 } +00065 +<a name="l00066"></a><a class="code" href="classNLMISC_1_1CValueSmoother.html#a3">00066</a> <font class="keywordtype">void</font> CValueSmoother::addValue(<font class="keywordtype">float</font> dt) +00067 { +00068 <font class="comment">// update the frame sum. NB: see init(), at start, array is full of 0. so it works even for un-inited values.</font> +00069 <a class="code" href="classNLMISC_1_1CValueSmoother.html#o3">_FrameSum</a>-= <a class="code" href="classNLMISC_1_1CValueSmoother.html#o0">_LastFrames</a>[<a class="code" href="classNLMISC_1_1CValueSmoother.html#o1">_CurFrame</a>]; +00070 <a class="code" href="classNLMISC_1_1CValueSmoother.html#o3">_FrameSum</a>+= dt; +00071 +00072 <font class="comment">// bkup this value in the array.</font> +00073 <a class="code" href="classNLMISC_1_1CValueSmoother.html#o0">_LastFrames</a>[<a class="code" href="classNLMISC_1_1CValueSmoother.html#o1">_CurFrame</a>]= dt; +00074 +00075 <font class="comment">// next frame.</font> +00076 <a class="code" href="classNLMISC_1_1CValueSmoother.html#o1">_CurFrame</a>++; +00077 <a class="code" href="classNLMISC_1_1CValueSmoother.html#o1">_CurFrame</a>%=<a class="code" href="classNLMISC_1_1CValueSmoother.html#o0">_LastFrames</a>.size(); +00078 +00079 <font class="comment">// update the number of frames added.</font> +00080 <a class="code" href="classNLMISC_1_1CValueSmoother.html#o2">_NumFrame</a>++; +00081 <a class="code" href="classNLMISC_1_1CValueSmoother.html#o2">_NumFrame</a>= <a class="code" href="bit__set_8cpp.html#a0">min</a>(<a class="code" href="classNLMISC_1_1CValueSmoother.html#o2">_NumFrame</a>, <a class="code" href="classNLMISC_1_1CValueSmoother.html#o0">_LastFrames</a>.size()); +00082 } +00083 +<a name="l00084"></a><a class="code" href="classNLMISC_1_1CValueSmoother.html#a4">00084</a> <font class="keywordtype">float</font> CValueSmoother::getSmoothValue() +00085 { +00086 <font class="keywordflow">if</font>(_NumFrame) +00087 <font class="keywordflow">return</font> <a class="code" href="classNLMISC_1_1CValueSmoother.html#o3">_FrameSum</a> / <a class="code" href="classNLMISC_1_1CValueSmoother.html#o2">_NumFrame</a>; +00088 <font class="keywordflow">else</font> +00089 <font class="keywordflow">return</font> 0; +00090 } +00091 +00092 +00093 +00094 } <font class="comment">// NLMISC</font> +</pre></div> + +<!-- footer --> +<BR><FONT Size=+5> </FONT> +</TD> +<TD WIDTH=15><IMG SRC=http://www.nevrax.org/inc/img/pixel.gif WIDTH=15 HEIGHT=15 BORDER=0 ALT=""></TD> +</TR> +</TABLE> +</BODY> +</HTML> |