ITK  6.0.0
Insight Toolkit
itkNormalVariateGenerator.h
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1/*=========================================================================
2 *
3 * Copyright NumFOCUS
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
8 *
9 * https://www.apache.org/licenses/LICENSE-2.0.txt
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 *
17 *=========================================================================*/
18#ifndef itkNormalVariateGenerator_h
19#define itkNormalVariateGenerator_h
20
21#include "itkObjectFactory.h"
23#include "ITKStatisticsExport.h"
24
25namespace itk
26{
27namespace Statistics
28{
98class ITKStatistics_EXPORT NormalVariateGenerator : public RandomVariateGeneratorBase
99{
100public:
106
108 itkOverrideGetNameOfClassMacro(NormalVariateGenerator);
109
111 itkNewMacro(Self);
112
114 void
115 Initialize(int randomSeed);
116
118 double
119 GetVariate() override;
120
121protected:
124 void
125 PrintSelf(std::ostream & os, Indent indent) const override;
126
128 double
130
131private:
132 static inline int
134 {
135 // shifting of signed integer gives undefined results, explicitly
136 // cast to unsigned to get expected ( if two complement
137 // representation ) results.
138 auto uirs = static_cast<unsigned int>(irs);
139 return static_cast<int>((irs <= 0) ? ((uirs << 1) ^ 333556017) : (uirs << 1));
140 }
141
142 double m_Scale{};
143 double m_Rscale{};
144 double m_Rcons{};
145
146 static constexpr int m_ELEN{ 7 };
147 // LEN must be 2 ** ELEN
148 static constexpr int m_LEN{ 128 };
149 static constexpr int m_LMASK{ 4 * (m_LEN - 1) };
150 static constexpr int m_TLEN{ 8 * m_LEN };
151
152 int m_Gaussfaze{};
153 int * m_Gausssave{};
154
155 double m_GScale{};
156
157 int m_Vec1[m_TLEN]{};
158 int m_Nslew{};
159 int m_Irs{};
160 int m_Lseed{};
161 double m_Chic1{};
162 double m_Chic2{};
163 double m_ActualRSD{};
164}; // end of class
165} // end of namespace Statistics
166} // end of namespace itk
167#endif
Control indentation during Print() invocation.
Definition: itkIndent.h:50
Light weight base class for most itk classes.
void PrintSelf(std::ostream &os, Indent indent) const override
Defines common interfaces for random variate generators.
The "itk" namespace contains all Insight Segmentation and Registration Toolkit (ITK) classes....