CS计算机代考程序代写 ///////////////////////////////////////////////////////////////////////////////////

///////////////////////////////////////////////////////////////////////////////////
/// OpenGL Mathematics (glm.g-truc.net)
///
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/// @ref gtx_gradient_paint
/// @file glm/gtx/gradient_paint.inl
/// @date 2009-03-06 / 2013-04-09
/// @author Christophe Riccio
///////////////////////////////////////////////////////////////////////////////////////////////////

namespace glm
{
template
GLM_FUNC_QUALIFIER T radialGradient
(
tvec2 const & Center,
T const & Radius,
tvec2 const & Focal,
tvec2 const & Position
)
{
tvec2 F = Focal – Center;
tvec2 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
GLM_FUNC_QUALIFIER T linearGradient
(
tvec2 const & Point0,
tvec2 const & Point1,
tvec2 const & Position
)
{
tvec2 Dist = Point1 – Point0;
return (Dist.x * (Position.x – Point0.x) + Dist.y * (Position.y – Point0.y)) / glm::dot(Dist, Dist);
}
}//namespace glm