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ShaderPlayground / deps / glm / glm / gtx / component_wise.inl
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1/// @ref gtx_component_wise
2
3#include <limits>
4
5namespace glm{
6namespace detail
7{
8 template<length_t L, typename T, typename floatType, qualifier Q, bool isInteger, bool signedType>
9 struct compute_compNormalize
10 {};
11
12 template<length_t L, typename T, typename floatType, qualifier Q>
13 struct compute_compNormalize<L, T, floatType, Q, true, true>
14 {
15 GLM_FUNC_QUALIFIER static vec<L, floatType, Q> call(vec<L, T, Q> const& v)
16 {
17 floatType const Min = static_cast<floatType>(std::numeric_limits<T>::min());
18 floatType const Max = static_cast<floatType>(std::numeric_limits<T>::max());
19 return (vec<L, floatType, Q>(v) - Min) / (Max - Min) * static_cast<floatType>(2) - static_cast<floatType>(1);
20 }
21 };
22
23 template<length_t L, typename T, typename floatType, qualifier Q>
24 struct compute_compNormalize<L, T, floatType, Q, true, false>
25 {
26 GLM_FUNC_QUALIFIER static vec<L, floatType, Q> call(vec<L, T, Q> const& v)
27 {
28 return vec<L, floatType, Q>(v) / static_cast<floatType>(std::numeric_limits<T>::max());
29 }
30 };
31
32 template<length_t L, typename T, typename floatType, qualifier Q>
33 struct compute_compNormalize<L, T, floatType, Q, false, true>
34 {
35 GLM_FUNC_QUALIFIER static vec<L, floatType, Q> call(vec<L, T, Q> const& v)
36 {
37 return v;
38 }
39 };
40
41 template<length_t L, typename T, typename floatType, qualifier Q, bool isInteger, bool signedType>
42 struct compute_compScale
43 {};
44
45 template<length_t L, typename T, typename floatType, qualifier Q>
46 struct compute_compScale<L, T, floatType, Q, true, true>
47 {
48 GLM_FUNC_QUALIFIER static vec<L, T, Q> call(vec<L, floatType, Q> const& v)
49 {
50 floatType const Max = static_cast<floatType>(std::numeric_limits<T>::max()) + static_cast<floatType>(0.5);
51 vec<L, floatType, Q> const Scaled(v * Max);
52 vec<L, T, Q> const Result(Scaled - static_cast<floatType>(0.5));
53 return Result;
54 }
55 };
56
57 template<length_t L, typename T, typename floatType, qualifier Q>
58 struct compute_compScale<L, T, floatType, Q, true, false>
59 {
60 GLM_FUNC_QUALIFIER static vec<L, T, Q> call(vec<L, floatType, Q> const& v)
61 {
62 return vec<L, T, Q>(vec<L, floatType, Q>(v) * static_cast<floatType>(std::numeric_limits<T>::max()));
63 }
64 };
65
66 template<length_t L, typename T, typename floatType, qualifier Q>
67 struct compute_compScale<L, T, floatType, Q, false, true>
68 {
69 GLM_FUNC_QUALIFIER static vec<L, T, Q> call(vec<L, floatType, Q> const& v)
70 {
71 return v;
72 }
73 };
74}//namespace detail
75
76 template<typename floatType, length_t L, typename T, qualifier Q>
77 GLM_FUNC_QUALIFIER vec<L, floatType, Q> compNormalize(vec<L, T, Q> const& v)
78 {
79 GLM_STATIC_ASSERT(std::numeric_limits<floatType>::is_iec559, "'compNormalize' accepts only floating-point types for 'floatType' template parameter");
80
81 return detail::compute_compNormalize<L, T, floatType, Q, std::numeric_limits<T>::is_integer, std::numeric_limits<T>::is_signed>::call(v);
82 }
83
84 template<typename T, length_t L, typename floatType, qualifier Q>
85 GLM_FUNC_QUALIFIER vec<L, T, Q> compScale(vec<L, floatType, Q> const& v)
86 {
87 GLM_STATIC_ASSERT(std::numeric_limits<floatType>::is_iec559, "'compScale' accepts only floating-point types for 'floatType' template parameter");
88
89 return detail::compute_compScale<L, T, floatType, Q, std::numeric_limits<T>::is_integer, std::numeric_limits<T>::is_signed>::call(v);
90 }
91
92 template<length_t L, typename T, qualifier Q>
93 GLM_FUNC_QUALIFIER T compAdd(vec<L, T, Q> const& v)
94 {
95 T Result(0);
96 for(length_t i = 0, n = v.length(); i < n; ++i)
97 Result += v[i];
98 return Result;
99 }
100
101 template<length_t L, typename T, qualifier Q>
102 GLM_FUNC_QUALIFIER T compMul(vec<L, T, Q> const& v)
103 {
104 T Result(1);
105 for(length_t i = 0, n = v.length(); i < n; ++i)
106 Result *= v[i];
107 return Result;
108 }
109
110 template<length_t L, typename T, qualifier Q>
111 GLM_FUNC_QUALIFIER T compMin(vec<L, T, Q> const& v)
112 {
113 T Result(v[0]);
114 for(length_t i = 1, n = v.length(); i < n; ++i)
115 Result = min(Result, v[i]);
116 return Result;
117 }
118
119 template<length_t L, typename T, qualifier Q>
120 GLM_FUNC_QUALIFIER T compMax(vec<L, T, Q> const& v)
121 {
122 T Result(v[0]);
123 for(length_t i = 1, n = v.length(); i < n; ++i)
124 Result = max(Result, v[i]);
125 return Result;
126 }
127}//namespace glm