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This allows building against the same version of GLM across all targets and not deal with API changes of newer GLM versions which introduce regressions. Long term we want to migrate away from GLM and stick to a minimal self-written subset.
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<div id="projectname">0.9.7
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<li class="navelem"><a class="el" href="dir_275089585c7fc1b5fd5d7d42c69cb1da.html">D:</a></li><li class="navelem"><a class="el" href="dir_7b98f88bffbed4b390b5f8f520d9c08e.html">Source</a></li><li class="navelem"><a class="el" href="dir_1f76e953200861345293ade84ac7fb6c.html">G-Truc</a></li><li class="navelem"><a class="el" href="dir_e29b03b892e0e25920d021a614d4db9b.html">glm</a></li><li class="navelem"><a class="el" href="dir_5ce58d942b2d0776e17a9a58abc01e04.html">glm</a></li><li class="navelem"><a class="el" href="dir_8d176b5b7dd0ae42ea6876078f2bde49.html">gtx</a></li> </ul>
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<div class="title">fast_square_root.hpp</div> </div>
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<div class="contents">
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<a href="a00027.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> </div>
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<div class="line"><a name="l00044"></a><span class="lineno"> 44</span> <span class="preprocessor">#pragma once</span></div>
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<div class="line"><a name="l00045"></a><span class="lineno"> 45</span> </div>
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<div class="line"><a name="l00046"></a><span class="lineno"> 46</span> <span class="comment">// Dependency:</span></div>
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<div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="preprocessor">#include "../common.hpp"</span></div>
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<div class="line"><a name="l00048"></a><span class="lineno"> 48</span> <span class="preprocessor">#include "../exponential.hpp"</span></div>
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<div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="preprocessor">#include "../geometric.hpp"</span></div>
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<div class="line"><a name="l00050"></a><span class="lineno"> 50</span> </div>
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<div class="line"><a name="l00051"></a><span class="lineno"> 51</span> <span class="preprocessor">#if(defined(GLM_MESSAGES) && !defined(GLM_EXT_INCLUDED))</span></div>
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<div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="preprocessor"># pragma message("GLM: GLM_GTX_fast_square_root extension included")</span></div>
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<div class="line"><a name="l00053"></a><span class="lineno"> 53</span> <span class="preprocessor">#endif</span></div>
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<div class="line"><a name="l00054"></a><span class="lineno"> 54</span> </div>
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<div class="line"><a name="l00055"></a><span class="lineno"> 55</span> <span class="keyword">namespace </span><a class="code" href="a00146.html">glm</a></div>
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<div class="line"><a name="l00056"></a><span class="lineno"> 56</span> {</div>
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<div class="line"><a name="l00059"></a><span class="lineno"> 59</span> </div>
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<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  <span class="keyword">template</span> <<span class="keyword">typename</span> genType> </div>
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<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  GLM_FUNC_DECL genType <a class="code" href="a00198.html#gaad9f601bbc3faa04dda384e4c4e1592c">fastSqrt</a>(genType x);</div>
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<div class="line"><a name="l00065"></a><span class="lineno"> 65</span> </div>
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<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  <span class="keyword">template</span> <<span class="keyword">typename</span> T, precision P, <span class="keyword">template</span> <<span class="keyword">typename</span>, precision> <span class="keyword">class </span>vecType></div>
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<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  GLM_FUNC_DECL vecType<T, P> <a class="code" href="a00198.html#gaad9f601bbc3faa04dda384e4c4e1592c">fastSqrt</a>(vecType<T, P> <span class="keyword">const</span> & x);</div>
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<div class="line"><a name="l00071"></a><span class="lineno"> 71</span> </div>
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<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  <span class="keyword">template</span> <<span class="keyword">typename</span> genType> </div>
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<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  GLM_FUNC_DECL genType <a class="code" href="a00198.html#ga903878071f92e51e551791e584a171a1">fastInverseSqrt</a>(genType x);</div>
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<div class="line"><a name="l00077"></a><span class="lineno"> 77</span> </div>
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<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  <span class="keyword">template</span> <<span class="keyword">typename</span> T, precision P, <span class="keyword">template</span> <<span class="keyword">typename</span>, precision> <span class="keyword">class </span>vecType></div>
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<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  GLM_FUNC_DECL vecType<T, P> <a class="code" href="a00198.html#ga903878071f92e51e551791e584a171a1">fastInverseSqrt</a>(vecType<T, P> <span class="keyword">const</span> & x);</div>
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<div class="line"><a name="l00083"></a><span class="lineno"> 83</span> </div>
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<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  <span class="keyword">template</span> <<span class="keyword">typename</span> genType></div>
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<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  GLM_FUNC_DECL genType <a class="code" href="a00198.html#gae28a3099cbd6404a4ea8ef22147ed7b0">fastLength</a>(genType x);</div>
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<div class="line"><a name="l00089"></a><span class="lineno"> 89</span> </div>
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<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  <span class="keyword">template</span> <<span class="keyword">typename</span> T, precision P, <span class="keyword">template</span> <<span class="keyword">typename</span>, precision> <span class="keyword">class </span>vecType></div>
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<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  GLM_FUNC_DECL T <a class="code" href="a00198.html#gae28a3099cbd6404a4ea8ef22147ed7b0">fastLength</a>(vecType<T, P> <span class="keyword">const</span> & x);</div>
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<div class="line"><a name="l00095"></a><span class="lineno"> 95</span> </div>
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<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  <span class="keyword">template</span> <<span class="keyword">typename</span> genType></div>
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<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  GLM_FUNC_DECL genType <a class="code" href="a00198.html#ga6d1ac559cd77d69119e30c3aca0e14b5">fastDistance</a>(genType x, genType y);</div>
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<div class="line"><a name="l00101"></a><span class="lineno"> 101</span> </div>
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<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  <span class="keyword">template</span> <<span class="keyword">typename</span> T, precision P, <span class="keyword">template</span> <<span class="keyword">typename</span>, precision> <span class="keyword">class </span>vecType></div>
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<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  GLM_FUNC_DECL T <a class="code" href="a00198.html#ga6d1ac559cd77d69119e30c3aca0e14b5">fastDistance</a>(vecType<T, P> <span class="keyword">const</span> & x, vecType<T, P> <span class="keyword">const</span> & y);</div>
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<div class="line"><a name="l00107"></a><span class="lineno"> 107</span> </div>
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<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  <span class="keyword">template</span> <<span class="keyword">typename</span> genType> </div>
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<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  GLM_FUNC_DECL genType <a class="code" href="a00198.html#ga3b02c1d6e0c754144e2f1e110bf9f16c">fastNormalize</a>(genType <span class="keyword">const</span> & x);</div>
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<div class="line"><a name="l00113"></a><span class="lineno"> 113</span> </div>
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<div class="line"><a name="l00115"></a><span class="lineno"> 115</span> }<span class="comment">// namespace glm</span></div>
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<div class="line"><a name="l00116"></a><span class="lineno"> 116</span> </div>
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<div class="line"><a name="l00117"></a><span class="lineno"> 117</span> <span class="preprocessor">#include "fast_square_root.inl"</span></div>
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<div class="ttc" id="a00198_html_gaad9f601bbc3faa04dda384e4c4e1592c"><div class="ttname"><a href="a00198.html#gaad9f601bbc3faa04dda384e4c4e1592c">glm::fastSqrt</a></div><div class="ttdeci">GLM_FUNC_DECL vecType< T, P > fastSqrt(vecType< T, P > const &x)</div><div class="ttdoc">Faster than the common sqrt function but less accurate. </div></div>
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<div class="ttc" id="a00198_html_gae28a3099cbd6404a4ea8ef22147ed7b0"><div class="ttname"><a href="a00198.html#gae28a3099cbd6404a4ea8ef22147ed7b0">glm::fastLength</a></div><div class="ttdeci">GLM_FUNC_DECL T fastLength(vecType< T, P > const &x)</div><div class="ttdoc">Faster than the common length function but less accurate. </div></div>
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<div class="ttc" id="a00198_html_ga6d1ac559cd77d69119e30c3aca0e14b5"><div class="ttname"><a href="a00198.html#ga6d1ac559cd77d69119e30c3aca0e14b5">glm::fastDistance</a></div><div class="ttdeci">GLM_FUNC_DECL T fastDistance(vecType< T, P > const &x, vecType< T, P > const &y)</div><div class="ttdoc">Faster than the common distance function but less accurate. </div></div>
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<div class="ttc" id="a00198_html_ga903878071f92e51e551791e584a171a1"><div class="ttname"><a href="a00198.html#ga903878071f92e51e551791e584a171a1">glm::fastInverseSqrt</a></div><div class="ttdeci">GLM_FUNC_DECL vecType< T, P > fastInverseSqrt(vecType< T, P > const &x)</div><div class="ttdoc">Faster than the common inversesqrt function but less accurate. </div></div>
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<div class="ttc" id="a00198_html_ga3b02c1d6e0c754144e2f1e110bf9f16c"><div class="ttname"><a href="a00198.html#ga3b02c1d6e0c754144e2f1e110bf9f16c">glm::fastNormalize</a></div><div class="ttdeci">GLM_FUNC_DECL genType fastNormalize(genType const &x)</div><div class="ttdoc">Faster than the common normalize function but less accurate. </div></div>
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<div class="ttc" id="a00146_html"><div class="ttname"><a href="a00146.html">glm</a></div><div class="ttdef"><b>Definition:</b> <a href="a00003_source.html#l00040">_noise.hpp:40</a></div></div>
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