MIRA
Power.h
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38 
48 #ifndef _MIRA_POWER_H_
49 #define _MIRA_POWER_H_
50 
51 #include <cmath>
52 
53 namespace mira {
54 
56 
57 namespace detail {
58 
59 template <typename T, int N>
61 {
62  inline static T eval(T base) {
63  return PowerComputer<T,N-1>::eval(base)*base;
64  }
65 };
66 
67 template <typename T>
68 struct PowerComputer<T,1>
69 {
70  inline static T eval(T base) {
71  return base;
72  }
73 };
74 
75 template <typename T>
76 struct PowerComputer<T,0>
77 {
78  inline static T eval(T base) {
79  return 1;
80  }
81 };
82 
83 }
85 
103 template <int exponent, typename T>
104 inline T pow(T base)
105 {
107 }
108 
113 template <typename T>
114 inline T pow2(T base)
115 {
116  return base*base;
117 }
118 
123 template <typename T>
124 inline T pow3(T base)
125 {
126  return base*base*base;
127 }
128 
130 
142 template<int base, int exponent>
143 struct TPower {
144  enum {
145  value = TPower<base,exponent-1>::value * base
146  };
147 };
148 
149 template<int base>
150 struct TPower<base,0> {
151  enum {
152  value = 1
153  };
154 };
155 
156 
158 
159 // two workarounds for those guys that use the old C pow(double,double) method -
160 // this now delegate those calls to the preferred std::pow() methods
161 template <typename T, typename U>
162 inline T pow(T base, U exponent)
163 {
164  return std::pow(base,exponent);
165 }
166 
167 template <typename T>
168 inline T pow(T base, T exponent)
169 {
170  return std::pow(base,exponent);
171 }
172 
174 
175 } // namespace
176 
177 #endif
Definition: Power.h:60
specialize cv::DataType for our ImgPixel and inherit from cv::DataType<Vec>
Definition: IOService.h:67
T pow3(T base)
Computes base^3.
Definition: Power.h:124
static T eval(T base)
Definition: Power.h:70
static T eval(T base)
Definition: Power.h:78
T pow(T base, T exponent)
Definition: Power.h:168
static T eval(T base)
Definition: Power.h:62
Computes the power base^exponent at compile time.
Definition: Power.h:143
T pow(T base)
Computes the power of &#39;base&#39; with a constant integral exponent.
Definition: Power.h:104
Definition: Power.h:145
T pow2(T base)
Computes base^2.
Definition: Power.h:114