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-///////////////////////////////////////////////////////////////////////////////////
-/// 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