Visual Servoing Platform  version 3.6.1 under development (2024-02-13)
vpGaussRand.cpp
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31  * Description:
32  * Generation of random number with uniform and normal probability density.
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35 
36 #include <math.h>
37 #include <visp3/core/vpGaussRand.h>
38 
46 double vpGaussRand::gaussianDraw()
47 {
48  if (m_AlreadyDone) {
49  m_AlreadyDone = false;
50  return m_x2;
51  }
52 
53  else {
54  double v1 = 0, v2 = 0, rsq = 0;
55  do {
56  v1 = 2 * m_rng.uniform(0.0, 1.0) - 1;
57  v2 = 2 * m_rng.uniform(0.0, 1.0) - 1;
58  rsq = v1 * v1 + v2 * v2;
59  } while (rsq >= 1);
60 
61  double fac = sqrt(-2 * log(rsq) / rsq);
62  m_x2 = v2 * fac;
63  m_AlreadyDone = true;
64  return v1 * fac;
65  }
66 }
int uniform(int a, int b)
Definition: vpUniRand.cpp:160