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87 lines
3.0 KiB
87 lines
3.0 KiB
/////////////////////////////////////////////////////////////////////////////////// |
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/// OpenGL Mathematics (glm.g-truc.net) |
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/// |
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/// Copyright (c) 2005 - 2015 G-Truc Creation (www.g-truc.net) |
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/// Permission is hereby granted, free of charge, to any person obtaining a copy |
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/// of this software and associated documentation files (the "Software"), to deal |
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/// in the Software without restriction, including without limitation the rights |
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/// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
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/// copies of the Software, and to permit persons to whom the Software is |
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/// furnished to do so, subject to the following conditions: |
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/// |
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/// The above copyright notice and this permission notice shall be included in |
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/// all copies or substantial portions of the Software. |
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/// |
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/// Restrictions: |
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/// By making use of the Software for military purposes, you choose to make |
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/// a Bunny unhappy. |
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/// |
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/// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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/// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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/// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
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/// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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/// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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/// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
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/// THE SOFTWARE. |
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/// |
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/// @ref gtx_vector_angle |
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/// @file glm/gtx/vector_angle.inl |
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/// @date 2005-12-30 / 2011-06-07 |
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/// @author Christophe Riccio |
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/////////////////////////////////////////////////////////////////////////////////// |
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namespace glm |
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{ |
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template <typename genType> |
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GLM_FUNC_QUALIFIER genType angle |
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( |
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genType const & x, |
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genType const & y |
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) |
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{ |
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GLM_STATIC_ASSERT(std::numeric_limits<genType>::is_iec559, "'angle' only accept floating-point inputs"); |
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return acos(clamp(dot(x, y), genType(-1), genType(1))); |
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} |
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template <typename T, precision P, template <typename, precision> class vecType> |
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GLM_FUNC_QUALIFIER T angle |
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( |
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vecType<T, P> const & x, |
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vecType<T, P> const & y |
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) |
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{ |
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GLM_STATIC_ASSERT(std::numeric_limits<T>::is_iec559, "'angle' only accept floating-point inputs"); |
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return acos(clamp(dot(x, y), T(-1), T(1))); |
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} |
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//! \todo epsilon is hard coded to 0.01 |
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template <typename T, precision P> |
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GLM_FUNC_QUALIFIER T orientedAngle |
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( |
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tvec2<T, P> const & x, |
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tvec2<T, P> const & y |
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) |
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{ |
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GLM_STATIC_ASSERT(std::numeric_limits<T>::is_iec559, "'orientedAngle' only accept floating-point inputs"); |
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T const Angle(acos(clamp(dot(x, y), T(-1), T(1)))); |
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if(all(epsilonEqual(y, glm::rotate(x, Angle), T(0.0001)))) |
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return Angle; |
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else |
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return -Angle; |
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} |
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template <typename T, precision P> |
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GLM_FUNC_QUALIFIER T orientedAngle |
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( |
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tvec3<T, P> const & x, |
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tvec3<T, P> const & y, |
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tvec3<T, P> const & ref |
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) |
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{ |
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GLM_STATIC_ASSERT(std::numeric_limits<T>::is_iec559, "'orientedAngle' only accept floating-point inputs"); |
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T const Angle(acos(clamp(dot(x, y), T(-1), T(1)))); |
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return mix(Angle, -Angle, dot(ref, cross(x, y)) < T(0)); |
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} |
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}//namespace glm
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