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Diffstat (limited to '3rdparty/include/glm/gtx/gradient_paint.inl')
| -rw-r--r-- | 3rdparty/include/glm/gtx/gradient_paint.inl | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/3rdparty/include/glm/gtx/gradient_paint.inl b/3rdparty/include/glm/gtx/gradient_paint.inl new file mode 100644 index 0000000..9a2305f --- /dev/null +++ b/3rdparty/include/glm/gtx/gradient_paint.inl @@ -0,0 +1,66 @@ +/////////////////////////////////////////////////////////////////////////////////// +/// OpenGL Mathematics (glm.g-truc.net) +/// +/// Copyright (c) 2005 - 2015 G-Truc Creation (www.g-truc.net) +/// Permission is hereby granted, free of charge, to any person obtaining a copy +/// of this software and associated documentation files (the "Software"), to deal +/// in the Software without restriction, including without limitation the rights +/// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +/// 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. +/// +/// Restrictions: +/// By making use of the Software for military purposes, you choose to make +/// a Bunny unhappy. +/// +/// 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, +/// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN +/// THE SOFTWARE. +/// +/// @ref gtx_gradient_paint +/// @file glm/gtx/gradient_paint.inl +/// @date 2009-03-06 / 2013-04-09 +/// @author Christophe Riccio +/////////////////////////////////////////////////////////////////////////////////////////////////// + +namespace glm +{ + template <typename T, precision P> + GLM_FUNC_QUALIFIER T radialGradient + ( + tvec2<T, P> const & Center, + T const & Radius, + tvec2<T, P> const & Focal, + tvec2<T, P> const & Position + ) + { + tvec2<T, P> F = Focal - Center; + tvec2<T, P> D = Position - Focal; + T Radius2 = pow2(Radius); + T Fx2 = pow2(F.x); + T Fy2 = pow2(F.y); + + T Numerator = (D.x * F.x + D.y * F.y) + sqrt(Radius2 * (pow2(D.x) + pow2(D.y)) - pow2(D.x * F.y - D.y * F.x)); + T Denominator = Radius2 - (Fx2 + Fy2); + return Numerator / Denominator; + } + + template <typename T, precision P> + GLM_FUNC_QUALIFIER T linearGradient + ( + tvec2<T, P> const & Point0, + tvec2<T, P> const & Point1, + tvec2<T, P> const & Position + ) + { + tvec2<T, P> Dist = Point1 - Point0; + return (Dist.x * (Position.x - Point0.x) + Dist.y * (Position.y - Point0.y)) / glm::dot(Dist, Dist); + } +}//namespace glm |