88 lines
3.0 KiB
Plaintext
88 lines
3.0 KiB
Plaintext
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///////////////////////////////////////////////////////////////////////////////////
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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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