<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <title>SFML - Simple and Fast Multimedia Library</title> <meta http-equiv="Content-Type" content="text/html;charset=UTF-8" /> <link href="doxygen.css" rel="stylesheet" type="text/css" /> <link href="tabs.css" rel="stylesheet" type="text/css" /> </head> <body> <div id="logo"> <img src="./logo.jpg" width="770" height="200" title="SFML home" alt="SFML logo" /> </div> <!-- Generated by Doxygen 1.5.8 --> <div class="navigation" id="top"> <div class="tabs"> <ul> <li><a href="index.htm"><span>Main Page</span></a></li> <li><a href="namespaces.htm"><span>Namespaces</span></a></li> <li><a href="annotated.htm"><span>Classes</span></a></li> <li class="current"><a href="files.htm"><span>Files</span></a></li> </ul> </div> <div class="tabs"> <ul> <li><a href="files.htm"><span>File List</span></a></li> </ul> </div> <h1>Randomizer.cpp</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <a name="l00002"></a>00002 <span class="comment">//</span> <a name="l00003"></a>00003 <span class="comment">// SFML - Simple and Fast Multimedia Library</span> <a name="l00004"></a>00004 <span class="comment">// Copyright (C) 2007-2009 Laurent Gomila (laurent.gom@gmail.com)</span> <a name="l00005"></a>00005 <span class="comment">//</span> <a name="l00006"></a>00006 <span class="comment">// This software is provided 'as-is', without any express or implied warranty.</span> <a name="l00007"></a>00007 <span class="comment">// In no event will the authors be held liable for any damages arising from the use of this software.</span> <a name="l00008"></a>00008 <span class="comment">//</span> <a name="l00009"></a>00009 <span class="comment">// Permission is granted to anyone to use this software for any purpose,</span> <a name="l00010"></a>00010 <span class="comment">// including commercial applications, and to alter it and redistribute it freely,</span> <a name="l00011"></a>00011 <span class="comment">// subject to the following restrictions:</span> <a name="l00012"></a>00012 <span class="comment">//</span> <a name="l00013"></a>00013 <span class="comment">// 1. The origin of this software must not be misrepresented;</span> <a name="l00014"></a>00014 <span class="comment">// you must not claim that you wrote the original software.</span> <a name="l00015"></a>00015 <span class="comment">// If you use this software in a product, an acknowledgment</span> <a name="l00016"></a>00016 <span class="comment">// in the product documentation would be appreciated but is not required.</span> <a name="l00017"></a>00017 <span class="comment">//</span> <a name="l00018"></a>00018 <span class="comment">// 2. Altered source versions must be plainly marked as such,</span> <a name="l00019"></a>00019 <span class="comment">// and must not be misrepresented as being the original software.</span> <a name="l00020"></a>00020 <span class="comment">//</span> <a name="l00021"></a>00021 <span class="comment">// 3. This notice may not be removed or altered from any source distribution.</span> <a name="l00022"></a>00022 <span class="comment">//</span> <a name="l00024"></a>00024 <span class="comment"></span> <a name="l00026"></a>00026 <span class="comment">// Headers</span> <a name="l00028"></a>00028 <span class="comment"></span><span class="preprocessor">#include <SFML/System/Randomizer.hpp></span> <a name="l00029"></a>00029 <span class="preprocessor">#include <SFML/System/Platform.hpp></span> <a name="l00030"></a>00030 <span class="preprocessor">#include <cstdlib></span> <a name="l00031"></a>00031 <a name="l00032"></a>00032 <a name="l00033"></a>00033 <span class="keyword">namespace</span> <a name="l00034"></a>00034 { <a name="l00035"></a>00035 <span class="comment">// Set the random numbers sequence seed with the current system time, so that it is always different</span> <a name="l00036"></a>00036 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> SetRandomSeed() <a name="l00037"></a>00037 { <a name="l00038"></a>00038 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> Seed = <span class="keyword">static_cast<</span><span class="keywordtype">unsigned</span> <span class="keywordtype">int</span><span class="keyword">></span>(sf::priv::Platform::GetSystemTime() * 1000); <a name="l00039"></a>00039 srand(Seed); <a name="l00040"></a>00040 <span class="keywordflow">return</span> Seed; <a name="l00041"></a>00041 } <a name="l00042"></a>00042 } <a name="l00043"></a>00043 <a name="l00044"></a>00044 <a name="l00045"></a>00045 <span class="keyword">namespace </span>sf <a name="l00046"></a>00046 { <a name="l00048"></a>00048 <span class="comment">// Static member variables</span> <a name="l00050"></a>00050 <span class="comment"></span><span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> Randomizer::ourSeed = SetRandomSeed(); <a name="l00051"></a>00051 <a name="l00052"></a>00052 <a name="l00057"></a><a class="code" href="classsf_1_1Randomizer.htm#4cba1a8faeedf65ec732febef8aac937">00057</a> <span class="keywordtype">void</span> <a class="code" href="classsf_1_1Randomizer.htm#4cba1a8faeedf65ec732febef8aac937" title="Set the seed for the generator.">Randomizer::SetSeed</a>(<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> Seed) <a name="l00058"></a>00058 { <a name="l00059"></a>00059 srand(Seed); <a name="l00060"></a>00060 ourSeed = Seed; <a name="l00061"></a>00061 } <a name="l00062"></a>00062 <a name="l00063"></a>00063 <a name="l00067"></a><a class="code" href="classsf_1_1Randomizer.htm#490911d5e87a4d3043b85def7b2c0d48">00067</a> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> <a class="code" href="classsf_1_1Randomizer.htm#490911d5e87a4d3043b85def7b2c0d48" title="Get the seed used to generate random numbers the generator.">Randomizer::GetSeed</a>() <a name="l00068"></a>00068 { <a name="l00069"></a>00069 <span class="keywordflow">return</span> ourSeed; <a name="l00070"></a>00070 } <a name="l00071"></a>00071 <a name="l00072"></a>00072 <a name="l00076"></a><a class="code" href="classsf_1_1Randomizer.htm#d788e20470b24935fa3fff4aa9f1b575">00076</a> <span class="keywordtype">float</span> <a class="code" href="classsf_1_1Randomizer.htm#d788e20470b24935fa3fff4aa9f1b575" title="Get a random float number in a given range.">Randomizer::Random</a>(<span class="keywordtype">float</span> Begin, <span class="keywordtype">float</span> End) <a name="l00077"></a>00077 { <a name="l00078"></a>00078 <span class="comment">// This is not the best algorithm, but it is fast and will be enough in most cases</span> <a name="l00079"></a>00079 <span class="comment">// (see Google for best approaches)</span> <a name="l00080"></a>00080 <a name="l00081"></a>00081 <span class="keywordflow">return</span> <span class="keyword">static_cast<</span><span class="keywordtype">float</span><span class="keyword">></span>(rand()) / RAND_MAX * (End - Begin) + Begin; <a name="l00082"></a>00082 } <a name="l00083"></a>00083 <a name="l00084"></a>00084 <a name="l00088"></a><a class="code" href="classsf_1_1Randomizer.htm#d019beb93fc4779ab8e13af833fac237">00088</a> <span class="keywordtype">int</span> <a class="code" href="classsf_1_1Randomizer.htm#d788e20470b24935fa3fff4aa9f1b575" title="Get a random float number in a given range.">Randomizer::Random</a>(<span class="keywordtype">int</span> Begin, <span class="keywordtype">int</span> End) <a name="l00089"></a>00089 { <a name="l00090"></a>00090 <span class="comment">// This is not the best algorithm, but it is fast and will be enough in most cases</span> <a name="l00091"></a>00091 <span class="comment">// (see Google for best approaches)</span> <a name="l00092"></a>00092 <a name="l00093"></a>00093 <span class="keywordflow">return</span> rand() % (End - Begin + 1) + Begin; <a name="l00094"></a>00094 } <a name="l00095"></a>00095 <a name="l00096"></a>00096 } <span class="comment">// namespace sf</span> </pre></div></div> <p id="footer"> :: Copyright © 2007-2008 Laurent Gomila, all rights reserved :: Documentation generated by <a href="http://www.doxygen.org/" title="doxygen website">doxygen 1.5.2</a> :: </p> </body> </html>