1 /////////////////////////////////////////////////////////////////////////////////// 2 /// OpenGL Mathematics (glm.g-truc.net) 3 /// 4 /// Copyright (c) 2005 - 2014 G-Truc Creation (www.g-truc.net) 5 /// Permission is hereby granted, free of charge, to any person obtaining a copy 6 /// of this software and associated documentation files (the "Software"), to deal 7 /// in the Software without restriction, including without limitation the rights 8 /// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 9 /// copies of the Software, and to permit persons to whom the Software is 10 /// furnished to do so, subject to the following conditions: 11 /// 12 /// The above copyright notice and this permission notice shall be included in 13 /// all copies or substantial portions of the Software. 14 /// 15 /// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 /// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 /// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 18 /// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19 /// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 20 /// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 21 /// THE SOFTWARE. 22 /// 23 /// @ref core 24 /// @file glm/detail/_noise.hpp 25 /// @date 2013-12-24 / 2013-12-24 26 /// @author Christophe Riccio 27 /////////////////////////////////////////////////////////////////////////////////// 28 29 #ifndef GLM_DETAIL_NOISE_INCLUDED 30 #define GLM_DETAIL_NOISE_INCLUDED 31 32 namespace glm{ 33 namespace detail 34 { 35 template <typename T> 36 GLM_FUNC_QUALIFIER T mod289(T const & x) 37 { 38 return x - floor(x * static_cast<T>(1.0) / static_cast<T>(289.0)) * static_cast<T>(289.0); 39 } 40 41 template <typename T> 42 GLM_FUNC_QUALIFIER T permute(T const & x) 43 { 44 return mod289(((x * static_cast<T>(34)) + static_cast<T>(1)) * x); 45 } 46 47 template <typename T, precision P> 48 GLM_FUNC_QUALIFIER tvec2<T, P> permute(tvec2<T, P> const & x) 49 { 50 return mod289(((x * static_cast<T>(34)) + static_cast<T>(1)) * x); 51 } 52 53 template <typename T, precision P> 54 GLM_FUNC_QUALIFIER tvec3<T, P> permute(tvec3<T, P> const & x) 55 { 56 return mod289(((x * static_cast<T>(34)) + static_cast<T>(1)) * x); 57 } 58 59 template <typename T, precision P> 60 GLM_FUNC_QUALIFIER tvec4<T, P> permute(tvec4<T, P> const & x) 61 { 62 return mod289(((x * static_cast<T>(34)) + static_cast<T>(1)) * x); 63 } 64 /* 65 template <typename T, precision P, template<typename> class vecType> 66 GLM_FUNC_QUALIFIER vecType<T, P> permute(vecType<T, P> const & x) 67 { 68 return mod289(((x * T(34)) + T(1)) * x); 69 } 70 */ 71 template <typename T> 72 GLM_FUNC_QUALIFIER T taylorInvSqrt(T const & r) 73 { 74 return T(1.79284291400159) - T(0.85373472095314) * r; 75 } 76 77 template <typename T, precision P> 78 GLM_FUNC_QUALIFIER detail::tvec2<T, P> taylorInvSqrt(detail::tvec2<T, P> const & r) 79 { 80 return T(1.79284291400159) - T(0.85373472095314) * r; 81 } 82 83 template <typename T, precision P> 84 GLM_FUNC_QUALIFIER detail::tvec3<T, P> taylorInvSqrt(detail::tvec3<T, P> const & r) 85 { 86 return T(1.79284291400159) - T(0.85373472095314) * r; 87 } 88 89 template <typename T, precision P> 90 GLM_FUNC_QUALIFIER detail::tvec4<T, P> taylorInvSqrt(detail::tvec4<T, P> const & r) 91 { 92 return T(1.79284291400159) - T(0.85373472095314) * r; 93 } 94 /* 95 template <typename T, precision P, template<typename> class vecType> 96 GLM_FUNC_QUALIFIER vecType<T, P> taylorInvSqrt(vecType<T, P> const & r) 97 { 98 return T(1.79284291400159) - T(0.85373472095314) * r; 99 } 100 */ 101 102 template <typename T, precision P> 103 GLM_FUNC_QUALIFIER detail::tvec2<T, P> fade(detail::tvec2<T, P> const & t) 104 { 105 return (t * t * t) * (t * (t * T(6) - T(15)) + T(10)); 106 } 107 108 template <typename T, precision P> 109 GLM_FUNC_QUALIFIER detail::tvec3<T, P> fade(detail::tvec3<T, P> const & t) 110 { 111 return (t * t * t) * (t * (t * T(6) - T(15)) + T(10)); 112 } 113 114 template <typename T, precision P> 115 GLM_FUNC_QUALIFIER detail::tvec4<T, P> fade(detail::tvec4<T, P> const & t) 116 { 117 return (t * t * t) * (t * (t * T(6) - T(15)) + T(10)); 118 } 119 /* 120 template <typename T, precision P, template <typename> class vecType> 121 GLM_FUNC_QUALIFIER vecType<T, P> fade(vecType<T, P> const & t) 122 { 123 return (t * t * t) * (t * (t * T(6) - T(15)) + T(10)); 124 } 125 */ 126 }//namespace detail 127 }//namespace glm 128 129 #endif//GLM_DETAIL_NOISE_INCLUDED 130 131
