87 lines
2.1 KiB
C++
87 lines
2.1 KiB
C++
/// @ref core
|
|
/// @file glm/detail/_noise.hpp
|
|
|
|
#pragma once
|
|
|
|
#include "../vec2.hpp"
|
|
#include "../vec3.hpp"
|
|
#include "../vec4.hpp"
|
|
#include "../common.hpp"
|
|
|
|
namespace glm{
|
|
namespace detail
|
|
{
|
|
template<typename T>
|
|
GLM_FUNC_QUALIFIER T mod289(T const& x)
|
|
{
|
|
return x - floor(x * (static_cast<T>(1.0) / static_cast<T>(289.0))) * static_cast<T>(289.0);
|
|
}
|
|
|
|
template<typename T>
|
|
GLM_FUNC_QUALIFIER T permute(T const& x)
|
|
{
|
|
return mod289(((x * static_cast<T>(34)) + static_cast<T>(1)) * x);
|
|
}
|
|
|
|
template<typename T, qualifier Q>
|
|
GLM_FUNC_QUALIFIER vec<2, T, Q> permute(vec<2, T, Q> const& x)
|
|
{
|
|
return mod289(((x * static_cast<T>(34)) + static_cast<T>(1)) * x);
|
|
}
|
|
|
|
template<typename T, qualifier Q>
|
|
GLM_FUNC_QUALIFIER vec<3, T, Q> permute(vec<3, T, Q> const& x)
|
|
{
|
|
return mod289(((x * static_cast<T>(34)) + static_cast<T>(1)) * x);
|
|
}
|
|
|
|
template<typename T, qualifier Q>
|
|
GLM_FUNC_QUALIFIER vec<4, T, Q> permute(vec<4, T, Q> const& x)
|
|
{
|
|
return mod289(((x * static_cast<T>(34)) + static_cast<T>(1)) * x);
|
|
}
|
|
|
|
template<typename T>
|
|
GLM_FUNC_QUALIFIER T taylorInvSqrt(T const& r)
|
|
{
|
|
return T(1.79284291400159) - T(0.85373472095314) * r;
|
|
}
|
|
|
|
template<typename T, qualifier Q>
|
|
GLM_FUNC_QUALIFIER vec<2, T, Q> taylorInvSqrt(vec<2, T, Q> const& r)
|
|
{
|
|
return T(1.79284291400159) - T(0.85373472095314) * r;
|
|
}
|
|
|
|
template<typename T, qualifier Q>
|
|
GLM_FUNC_QUALIFIER vec<3, T, Q> taylorInvSqrt(vec<3, T, Q> const& r)
|
|
{
|
|
return T(1.79284291400159) - T(0.85373472095314) * r;
|
|
}
|
|
|
|
template<typename T, qualifier Q>
|
|
GLM_FUNC_QUALIFIER vec<4, T, Q> taylorInvSqrt(vec<4, T, Q> const& r)
|
|
{
|
|
return T(1.79284291400159) - T(0.85373472095314) * r;
|
|
}
|
|
|
|
template<typename T, qualifier Q>
|
|
GLM_FUNC_QUALIFIER vec<2, T, Q> fade(vec<2, T, Q> const& t)
|
|
{
|
|
return (t * t * t) * (t * (t * T(6) - T(15)) + T(10));
|
|
}
|
|
|
|
template<typename T, qualifier Q>
|
|
GLM_FUNC_QUALIFIER vec<3, T, Q> fade(vec<3, T, Q> const& t)
|
|
{
|
|
return (t * t * t) * (t * (t * T(6) - T(15)) + T(10));
|
|
}
|
|
|
|
template<typename T, qualifier Q>
|
|
GLM_FUNC_QUALIFIER vec<4, T, Q> fade(vec<4, T, Q> const& t)
|
|
{
|
|
return (t * t * t) * (t * (t * T(6) - T(15)) + T(10));
|
|
}
|
|
}//namespace detail
|
|
}//namespace glm
|
|
|