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lib/glm/gtx/gradient_paint.inl

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+/// @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