0.9.9 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_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.
Definition: common.hpp:20