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Diffstat (limited to 'external/include/glm/gtx/gradient_paint.inl')
| -rw-r--r-- | external/include/glm/gtx/gradient_paint.inl | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/external/include/glm/gtx/gradient_paint.inl b/external/include/glm/gtx/gradient_paint.inl new file mode 100644 index 0000000..aaa5ce1 --- /dev/null +++ b/external/include/glm/gtx/gradient_paint.inl @@ -0,0 +1,37 @@ +/// @ref gtx_gradient_paint +/// @file glm/gtx/gradient_paint.inl + +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 |