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<div id="projectname">Gamedev Framework (gf)
 <span id="projectnumber">0.6.0</span>
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<div id="projectbrief">A C++11 framework for 2D games</div>
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">/*</span></div><div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment"> * Gamedev Framework (gf)</span></div><div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> * Copyright (C) 2016-2017 Julien Bernard</span></div><div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> *</span></div><div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"> * This software is provided 'as-is', without any express or implied</span></div><div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> * warranty. In no event will the authors be held liable for any damages</span></div><div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> * arising from the use of this software.</span></div><div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> *</span></div><div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment"> * Permission is granted to anyone to use this software for any purpose,</span></div><div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"> * including commercial applications, and to alter it and redistribute it</span></div><div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"> * freely, subject to the following restrictions:</span></div><div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"> *</span></div><div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment"> * 1. The origin of this software must not be misrepresented; you must not</span></div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment"> * claim that you wrote the original software. If you use this software</span></div><div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment"> * in a product, an acknowledgment in the product documentation would be</span></div><div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment"> * appreciated but is not required.</span></div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment"> * 2. Altered source versions must be plainly marked as such, and must not be</span></div><div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment"> * misrepresented as being the original software.</span></div><div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="comment"> * 3. This notice may not be removed or altered from any source distribution.</span></div><div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="comment"> */</span></div><div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="preprocessor">#</span><span class="preprocessor">ifndef</span> <span class="preprocessor">GF_RANDOM_H</span></div><div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="preprocessor">#</span><span class="preprocessor">define</span> <span class="preprocessor">GF_RANDOM_H</span></div><div class="line"><a name="l00023"></a><span class="lineno"> 23</span> </div><div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="preprocessor">#</span><span class="preprocessor">include</span> <span class="preprocessor"><</span><span class="preprocessor">cstdint</span><span class="preprocessor">></span></div><div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="preprocessor">#</span><span class="preprocessor">include</span> <span class="preprocessor"><</span><span class="preprocessor">random</span><span class="preprocessor">></span></div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span> </div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="preprocessor">#</span><span class="preprocessor">include</span> <a class="code" href="_portability_8h.html">"Portability.h"</a></div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span> </div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="keyword">namespace</span> <a class="code" href="namespacegf.html">gf</a> {</div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="preprocessor">#</span><span class="preprocessor">ifndef</span> <span class="preprocessor">DOXYGEN_SHOULD_SKIP_THIS</span></div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="keyword">inline</span> <span class="keyword">namespace</span> v1 {</div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="preprocessor">#</span><span class="preprocessor">endif</span></div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span> </div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span>  <span class="comment">/**</span></div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="comment"> * @ingroup core</span></div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="comment"> * @brief A random engine</span></div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="comment"> *</span></div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="comment"> * gf::Random is a wrapper around [C++11 standard random features](http://en.cppreference.com/w/cpp/numeric/random).</span></div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="comment"> * It embeds a Mersenne Twister engine and provides several distributions</span></div><div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="comment"> * above this engine.</span></div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="comment"> *</span></div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="comment"> */</span></div><div class="line"><a name="l00043"></a><span class="lineno"><a class="line" href="classgf_1_1_random.html"> 43</a></span>  <span class="keyword">class</span> <a class="code" href="_portability_8h.html#a0169111e0ff1d9fe0f23dee89e904d57">GF_API</a> <a class="code" href="classgf_1_1_random.html">Random</a> {</div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  <span class="keyword">public</span>:</div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  <span class="comment">/**</span></div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span> <span class="comment"> * @brief Default constructor with complex initialization</span></div><div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="comment"> *</span></div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span> <span class="comment"> * This constructor initializes the Mersenne Twister thanks to a random</span></div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="comment"> * device and a seed sequence. This ensures that the state of the engine</span></div><div class="line"><a name="l00050"></a><span class="lineno"> 50</span> <span class="comment"> * is different for each instanciation. Choose this constructor if you</span></div><div class="line"><a name="l00051"></a><span class="lineno"> 51</span> <span class="comment"> * need good statistical randomness.</span></div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="comment"> */</span></div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  <a class="code" href="classgf_1_1_random.html#a27f5287d06f2d4f58f1796906f466204">Random</a>();</div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span> </div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  <span class="comment">/**</span></div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span> <span class="comment"> * @brief Constructor with simple initialization</span></div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span> <span class="comment"> *</span></div><div class="line"><a name="l00058"></a><span class="lineno"> 58</span> <span class="comment"> * This constructor initializes the Mersenne Twister with a single seed.</span></div><div class="line"><a name="l00059"></a><span class="lineno"> 59</span> <span class="comment"> * This method is easy but not very good because it allows only @f$ 2^{32} @f$</span></div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span> <span class="comment"> * possible states. Choose this constructor if you need reproducible</span></div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span> <span class="comment"> * randomness as a same seed will always provide the same sequence.</span></div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span> <span class="comment"> *</span></div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span> <span class="comment"> * @param seed The seed for the engine</span></div><div class="line"><a name="l00064"></a><span class="lineno"> 64</span> <span class="comment"> */</span></div><div class="line"><a name="l00065"></a><span class="lineno"><a class="line" href="classgf_1_1_random.html#a19401dba57cc2780114389c4875b1413"> 65</a></span>  <a class="code" href="classgf_1_1_random.html#a19401dba57cc2780114389c4875b1413">Random</a>(std::uint_fast32_t seed)</div><div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  : m_engine(seed)</div><div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  {</div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span> </div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  }</div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span> </div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  <span class="comment">/**</span></div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span> <span class="comment"> * @brief Compute an integer with a uniform distribution</span></div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span> <span class="comment"> *</span></div><div class="line"><a name="l00074"></a><span class="lineno"> 74</span> <span class="comment"> * @param min The minimum value (inclusive)</span></div><div class="line"><a name="l00075"></a><span class="lineno"> 75</span> <span class="comment"> * @param max The maximum value (inclusive)</span></div><div class="line"><a name="l00076"></a><span class="lineno"> 76</span> <span class="comment"> * @return A value between `min` and `max`</span></div><div class="line"><a name="l00077"></a><span class="lineno"> 77</span> <span class="comment"> */</span></div><div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  <span class="keyword">template</span><<span class="keyword">typename</span> T></div><div class="line"><a name="l00079"></a><span class="lineno"><a class="line" href="classgf_1_1_random.html#af53df683709acde299fd329dc96225b9"> 79</a></span>  T <a class="code" href="classgf_1_1_random.html#af53df683709acde299fd329dc96225b9">computeUniformInteger</a>(T min, T max) {</div><div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  std::uniform_int_distribution<T> dist(min, max);</div><div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  <span class="keywordflow">return</span> dist(m_engine);</div><div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  }</div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span> </div><div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  <span class="comment">/**</span></div><div class="line"><a name="l00085"></a><span class="lineno"> 85</span> <span class="comment"> * @brief Compute a float with a uniform distribution</span></div><div class="line"><a name="l00086"></a><span class="lineno"> 86</span> <span class="comment"> *</span></div><div class="line"><a name="l00087"></a><span class="lineno"> 87</span> <span class="comment"> * @param min The minimum value (inclusive)</span></div><div class="line"><a name="l00088"></a><span class="lineno"> 88</span> <span class="comment"> * @param max The maximum value (exclusive)</span></div><div class="line"><a name="l00089"></a><span class="lineno"> 89</span> <span class="comment"> * @return A value between `min` and `max`</span></div><div class="line"><a name="l00090"></a><span class="lineno"> 90</span> <span class="comment"> */</span></div><div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  <span class="keyword">template</span><<span class="keyword">typename</span> T></div><div class="line"><a name="l00092"></a><span class="lineno"><a class="line" href="classgf_1_1_random.html#a42d392ae9b78810209498300baf0158f"> 92</a></span>  T <a class="code" href="classgf_1_1_random.html#a42d392ae9b78810209498300baf0158f">computeUniformFloat</a>(T min, T max) {</div><div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  std::uniform_real_distribution<T> dist(min, max);</div><div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  <span class="keywordflow">return</span> dist(m_engine);</div><div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  }</div><div class="line"><a name="l00096"></a><span class="lineno"> 96</span> </div><div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  <span class="comment">/**</span></div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span> <span class="comment"> * @brief Compute a float with a normal (Gaussian) distribution</span></div><div class="line"><a name="l00099"></a><span class="lineno"> 99</span> <span class="comment"> *</span></div><div class="line"><a name="l00100"></a><span class="lineno"> 100</span> <span class="comment"> * @param mean The mean of the distribution</span></div><div class="line"><a name="l00101"></a><span class="lineno"> 101</span> <span class="comment"> * @param stddev The standard deviation of the distribution</span></div><div class="line"><a name="l00102"></a><span class="lineno"> 102</span> <span class="comment"> * @return A value with a normal distribution</span></div><div class="line"><a name="l00103"></a><span class="lineno"> 103</span> <span class="comment"> */</span></div><div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  <span class="keyword">template</span><<span class="keyword">typename</span> T></div><div class="line"><a name="l00105"></a><span class="lineno"><a class="line" href="classgf_1_1_random.html#a7d03561d34d91c6aac6f7d9f96e6cf58"> 105</a></span>  T <a class="code" href="classgf_1_1_random.html#a7d03561d34d91c6aac6f7d9f96e6cf58">computeNormalFloat</a>(T mean, T stddev) {</div><div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  std::normal_distribution<T> dist(mean, stddev);</div><div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  <span class="keywordflow">return</span> dist(m_engine);</div><div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  }</div><div class="line"><a name="l00109"></a><span class="lineno"> 109</span> </div><div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  <span class="comment">/**</span></div><div class="line"><a name="l00111"></a><span class="lineno"> 111</span> <span class="comment"> * @brief Compute a boolean with a Bernoulli distribution</span></div><div class="line"><a name="l00112"></a><span class="lineno"> 112</span> <span class="comment"> *</span></div><div class="line"><a name="l00113"></a><span class="lineno"> 113</span> <span class="comment"> * @param p The probability of true</span></div><div class="line"><a name="l00114"></a><span class="lineno"> 114</span> <span class="comment"> * @return true with a probability of @f$ p @f$.</span></div><div class="line"><a name="l00115"></a><span class="lineno"> 115</span> <span class="comment"> */</span></div><div class="line"><a name="l00116"></a><span class="lineno"><a class="line" href="classgf_1_1_random.html#a360f6193816c428a02b3fe9c2a4ed40e"> 116</a></span>  <span class="keywordtype">bool</span> <a class="code" href="classgf_1_1_random.html#a360f6193816c428a02b3fe9c2a4ed40e">computeBernoulli</a>(<span class="keywordtype">double</span> p) {</div><div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  std::bernoulli_distribution dist(p);</div><div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  <span class="keywordflow">return</span> dist(m_engine);</div><div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  }</div><div class="line"><a name="l00120"></a><span class="lineno"> 120</span> </div><div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  <span class="comment">/**</span></div><div class="line"><a name="l00122"></a><span class="lineno"> 122</span> <span class="comment"> * @brief Get the underlying engine</span></div><div class="line"><a name="l00123"></a><span class="lineno"> 123</span> <span class="comment"> *</span></div><div class="line"><a name="l00124"></a><span class="lineno"> 124</span> <span class="comment"> * @return A reference to the engine</span></div><div class="line"><a name="l00125"></a><span class="lineno"> 125</span> <span class="comment"> */</span></div><div class="line"><a name="l00126"></a><span class="lineno"><a class="line" href="classgf_1_1_random.html#a016df7d6b394bde106913a540f46803d"> 126</a></span>  std::mt19937& <a class="code" href="classgf_1_1_random.html#a016df7d6b394bde106913a540f46803d">getEngine</a>() {</div><div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  <span class="keywordflow">return</span> m_engine;</div><div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  }</div><div class="line"><a name="l00129"></a><span class="lineno"> 129</span> </div><div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  <span class="keyword">private</span>:</div><div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  std::mt19937 m_engine;</div><div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  };</div><div class="line"><a name="l00133"></a><span class="lineno"> 133</span> </div><div class="line"><a name="l00134"></a><span class="lineno"> 134</span> <span class="preprocessor">#</span><span class="preprocessor">ifndef</span> <span class="preprocessor">DOXYGEN_SHOULD_SKIP_THIS</span></div><div class="line"><a name="l00135"></a><span class="lineno"> 135</span> }</div><div class="line"><a name="l00136"></a><span class="lineno"> 136</span> <span class="preprocessor">#</span><span class="preprocessor">endif</span></div><div class="line"><a name="l00137"></a><span class="lineno"> 137</span> }</div><div class="line"><a name="l00138"></a><span class="lineno"> 138</span> </div><div class="line"><a name="l00139"></a><span class="lineno"> 139</span> <span class="preprocessor">#</span><span class="preprocessor">endif</span> <span class="comment">// GF_RANDOM_H</span></div><div class="ttc" id="classgf_1_1_random_html"><div class="ttname"><a href="classgf_1_1_random.html">gf::Random</a></div><div class="ttdoc">A random engine. </div><div class="ttdef"><b>Definition:</b> Random.h:43</div></div>
<div class="ttc" id="classgf_1_1_random_html_a7d03561d34d91c6aac6f7d9f96e6cf58"><div class="ttname"><a href="classgf_1_1_random.html#a7d03561d34d91c6aac6f7d9f96e6cf58">gf::Random::computeNormalFloat</a></div><div class="ttdeci">T computeNormalFloat(T mean, T stddev)</div><div class="ttdoc">Compute a float with a normal (Gaussian) distribution. </div><div class="ttdef"><b>Definition:</b> Random.h:105</div></div>
<div class="ttc" id="classgf_1_1_random_html_a42d392ae9b78810209498300baf0158f"><div class="ttname"><a href="classgf_1_1_random.html#a42d392ae9b78810209498300baf0158f">gf::Random::computeUniformFloat</a></div><div class="ttdeci">T computeUniformFloat(T min, T max)</div><div class="ttdoc">Compute a float with a uniform distribution. </div><div class="ttdef"><b>Definition:</b> Random.h:92</div></div>
<div class="ttc" id="classgf_1_1_random_html_a19401dba57cc2780114389c4875b1413"><div class="ttname"><a href="classgf_1_1_random.html#a19401dba57cc2780114389c4875b1413">gf::Random::Random</a></div><div class="ttdeci">Random(std::uint_fast32_t seed)</div><div class="ttdoc">Constructor with simple initialization. </div><div class="ttdef"><b>Definition:</b> Random.h:65</div></div>
<div class="ttc" id="namespacegf_html"><div class="ttname"><a href="namespacegf.html">gf</a></div><div class="ttdoc">The namespace for gf classes. </div><div class="ttdef"><b>Definition:</b> Action.h:34</div></div>
<div class="ttc" id="classgf_1_1_random_html_a360f6193816c428a02b3fe9c2a4ed40e"><div class="ttname"><a href="classgf_1_1_random.html#a360f6193816c428a02b3fe9c2a4ed40e">gf::Random::computeBernoulli</a></div><div class="ttdeci">bool computeBernoulli(double p)</div><div class="ttdoc">Compute a boolean with a Bernoulli distribution. </div><div class="ttdef"><b>Definition:</b> Random.h:116</div></div>
<div class="ttc" id="classgf_1_1_random_html_a27f5287d06f2d4f58f1796906f466204"><div class="ttname"><a href="classgf_1_1_random.html#a27f5287d06f2d4f58f1796906f466204">gf::Random::Random</a></div><div class="ttdeci">Random()</div><div class="ttdoc">Default constructor with complex initialization. </div></div>
<div class="ttc" id="classgf_1_1_random_html_a016df7d6b394bde106913a540f46803d"><div class="ttname"><a href="classgf_1_1_random.html#a016df7d6b394bde106913a540f46803d">gf::Random::getEngine</a></div><div class="ttdeci">std::mt19937 & getEngine()</div><div class="ttdoc">Get the underlying engine. </div><div class="ttdef"><b>Definition:</b> Random.h:126</div></div>
<div class="ttc" id="classgf_1_1_random_html_af53df683709acde299fd329dc96225b9"><div class="ttname"><a href="classgf_1_1_random.html#af53df683709acde299fd329dc96225b9">gf::Random::computeUniformInteger</a></div><div class="ttdeci">T computeUniformInteger(T min, T max)</div><div class="ttdoc">Compute an integer with a uniform distribution. </div><div class="ttdef"><b>Definition:</b> Random.h:79</div></div>
<div class="ttc" id="_portability_8h_html_a0169111e0ff1d9fe0f23dee89e904d57"><div class="ttname"><a href="_portability_8h.html#a0169111e0ff1d9fe0f23dee89e904d57">GF_API</a></div><div class="ttdeci">#define GF_API</div><div class="ttdef"><b>Definition:</b> Portability.h:35</div></div>
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