1.0.0 API documentation: _noise.hpp Source File

| 1.0.0 API documentation

_noise.hpp
1 #pragma once
2
3 #include "../common.hpp"
4
5 namespace glm{
6 namespace detail
7 {
8 template<typename T>
9 GLM_FUNC_QUALIFIER T mod289(T const& x)
10 {
11 return x - floor(x * (static_cast<T>(1.0) / static_cast<T>(289.0))) * static_cast<T>(289.0);
12 }
13
14 template<typename T>
15 GLM_FUNC_QUALIFIER T permute(T const& x)
16 {
17 return mod289(((x * static_cast<T>(34)) + static_cast<T>(1)) * x);
18 }
19
20 template<typename T, qualifier Q>
21 GLM_FUNC_QUALIFIER vec<2, T, Q> permute(vec<2, T, Q> const& x)
22 {
23 return mod289(((x * static_cast<T>(34)) + static_cast<T>(1)) * x);
24 }
25
26 template<typename T, qualifier Q>
27 GLM_FUNC_QUALIFIER vec<3, T, Q> permute(vec<3, T, Q> const& x)
28 {
29 return mod289(((x * static_cast<T>(34)) + static_cast<T>(1)) * x);
30 }
31
32 template<typename T, qualifier Q>
33 GLM_FUNC_QUALIFIER vec<4, T, Q> permute(vec<4, T, Q> const& x)
34 {
35 return mod289(((x * static_cast<T>(34)) + static_cast<T>(1)) * x);
36 }
37
38 template<typename T>
39 GLM_FUNC_QUALIFIER T taylorInvSqrt(T const& r)
40 {
41 return static_cast<T>(1.79284291400159) - static_cast<T>(0.85373472095314) * r;
42 }
43
44 template<typename T, qualifier Q>
45 GLM_FUNC_QUALIFIER vec<2, T, Q> taylorInvSqrt(vec<2, T, Q> const& r)
46 {
47 return static_cast<T>(1.79284291400159) - static_cast<T>(0.85373472095314) * r;
48 }
49
50 template<typename T, qualifier Q>
51 GLM_FUNC_QUALIFIER vec<3, T, Q> taylorInvSqrt(vec<3, T, Q> const& r)
52 {
53 return static_cast<T>(1.79284291400159) - static_cast<T>(0.85373472095314) * r;
54 }
55
56 template<typename T, qualifier Q>
57 GLM_FUNC_QUALIFIER vec<4, T, Q> taylorInvSqrt(vec<4, T, Q> const& r)
58 {
59 return static_cast<T>(1.79284291400159) - static_cast<T>(0.85373472095314) * r;
60 }
61
62 template<typename T, qualifier Q>
63 GLM_FUNC_QUALIFIER vec<2, T, Q> fade(vec<2, T, Q> const& t)
64 {
65 return (t * t * t) * (t * (t * static_cast<T>(6) - static_cast<T>(15)) + static_cast<T>(10));
66 }
67
68 template<typename T, qualifier Q>
69 GLM_FUNC_QUALIFIER vec<3, T, Q> fade(vec<3, T, Q> const& t)
70 {
71 return (t * t * t) * (t * (t * static_cast<T>(6) - static_cast<T>(15)) + static_cast<T>(10));
72 }
73
74 template<typename T, qualifier Q>
75 GLM_FUNC_QUALIFIER vec<4, T, Q> fade(vec<4, T, Q> const& t)
76 {
77 return (t * t * t) * (t * (t * static_cast<T>(6) - static_cast<T>(15)) + static_cast<T>(10));
78 }
79 }//namespace detail
80 }//namespace glm
81
glm::floor
GLM_FUNC_DECL vec< L, T, Q > floor(vec< L, T, Q > const &x)
Returns a value equal to the nearest integer that is less then or equal to x.