| /////////////////////////////////////////////////////////////////////////////////// |
| /// OpenGL Mathematics (glm.g-truc.net) |
| /// |
| /// Copyright (c) 2005 - 2014 G-Truc Creation (www.g-truc.net) |
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| /// copies of the Software, and to permit persons to whom the Software is |
| /// furnished to do so, subject to the following conditions: |
| /// |
| /// The above copyright notice and this permission notice shall be included in |
| /// all copies or substantial portions of the Software. |
| /// |
| /// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| /// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| /// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| /// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| /// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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| /// THE SOFTWARE. |
| /// |
| /// @ref core |
| /// @file glm/detail/_noise.hpp |
| /// @date 2013-12-24 / 2013-12-24 |
| /// @author Christophe Riccio |
| /////////////////////////////////////////////////////////////////////////////////// |
| |
| #ifndef GLM_DETAIL_NOISE_INCLUDED |
| #define GLM_DETAIL_NOISE_INCLUDED |
| |
| namespace glm{ |
| namespace detail |
| { |
| template <typename T> |
| GLM_FUNC_QUALIFIER T mod289(T const & x) |
| { |
| return x - floor(x * static_cast<T>(1.0) / static_cast<T>(289.0)) * static_cast<T>(289.0); |
| } |
| |
| template <typename T> |
| GLM_FUNC_QUALIFIER T permute(T const & x) |
| { |
| return mod289(((x * static_cast<T>(34)) + static_cast<T>(1)) * x); |
| } |
| |
| template <typename T, precision P> |
| GLM_FUNC_QUALIFIER tvec2<T, P> permute(tvec2<T, P> const & x) |
| { |
| return mod289(((x * static_cast<T>(34)) + static_cast<T>(1)) * x); |
| } |
| |
| template <typename T, precision P> |
| GLM_FUNC_QUALIFIER tvec3<T, P> permute(tvec3<T, P> const & x) |
| { |
| return mod289(((x * static_cast<T>(34)) + static_cast<T>(1)) * x); |
| } |
| |
| template <typename T, precision P> |
| GLM_FUNC_QUALIFIER tvec4<T, P> permute(tvec4<T, P> const & x) |
| { |
| return mod289(((x * static_cast<T>(34)) + static_cast<T>(1)) * x); |
| } |
| /* |
| template <typename T, precision P, template<typename> class vecType> |
| GLM_FUNC_QUALIFIER vecType<T, P> permute(vecType<T, P> const & x) |
| { |
| return mod289(((x * T(34)) + T(1)) * x); |
| } |
| */ |
| template <typename T> |
| GLM_FUNC_QUALIFIER T taylorInvSqrt(T const & r) |
| { |
| return T(1.79284291400159) - T(0.85373472095314) * r; |
| } |
| |
| template <typename T, precision P> |
| GLM_FUNC_QUALIFIER detail::tvec2<T, P> taylorInvSqrt(detail::tvec2<T, P> const & r) |
| { |
| return T(1.79284291400159) - T(0.85373472095314) * r; |
| } |
| |
| template <typename T, precision P> |
| GLM_FUNC_QUALIFIER detail::tvec3<T, P> taylorInvSqrt(detail::tvec3<T, P> const & r) |
| { |
| return T(1.79284291400159) - T(0.85373472095314) * r; |
| } |
| |
| template <typename T, precision P> |
| GLM_FUNC_QUALIFIER detail::tvec4<T, P> taylorInvSqrt(detail::tvec4<T, P> const & r) |
| { |
| return T(1.79284291400159) - T(0.85373472095314) * r; |
| } |
| /* |
| template <typename T, precision P, template<typename> class vecType> |
| GLM_FUNC_QUALIFIER vecType<T, P> taylorInvSqrt(vecType<T, P> const & r) |
| { |
| return T(1.79284291400159) - T(0.85373472095314) * r; |
| } |
| */ |
| |
| template <typename T, precision P> |
| GLM_FUNC_QUALIFIER detail::tvec2<T, P> fade(detail::tvec2<T, P> const & t) |
| { |
| return (t * t * t) * (t * (t * T(6) - T(15)) + T(10)); |
| } |
| |
| template <typename T, precision P> |
| GLM_FUNC_QUALIFIER detail::tvec3<T, P> fade(detail::tvec3<T, P> const & t) |
| { |
| return (t * t * t) * (t * (t * T(6) - T(15)) + T(10)); |
| } |
| |
| template <typename T, precision P> |
| GLM_FUNC_QUALIFIER detail::tvec4<T, P> fade(detail::tvec4<T, P> const & t) |
| { |
| return (t * t * t) * (t * (t * T(6) - T(15)) + T(10)); |
| } |
| /* |
| template <typename T, precision P, template <typename> class vecType> |
| GLM_FUNC_QUALIFIER vecType<T, P> fade(vecType<T, P> const & t) |
| { |
| return (t * t * t) * (t * (t * T(6) - T(15)) + T(10)); |
| } |
| */ |
| }//namespace detail |
| }//namespace glm |
| |
| #endif//GLM_DETAIL_NOISE_INCLUDED |
| |