mirror of
https://github.com/acemod/ACE3.git
synced 2024-08-30 18:23:18 +00:00
67 lines
2.5 KiB
Plaintext
67 lines
2.5 KiB
Plaintext
|
///////////////////////////////////////////////////////////////////////////////////
|
||
|
|
/// 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
|