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Cauchy.cpp

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 * This file is part of openWNS (open Wireless Network Simulator)
 * _____________________________________________________________________________
 *
 * Copyright (C) 2004-2007
 * Chair of Communication Networks (ComNets)
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 * A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
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#include <APPLICATIONS/distribution/Cauchy.hpp>

using namespace wns::distribution;

STATIC_FACTORY_REGISTER_WITH_CREATOR(
    Cauchy,
    Distribution,
    "applications.Cauchy",
    wns::PyConfigViewCreator);
STATIC_FACTORY_REGISTER_WITH_CREATOR(
    Cauchy,
    Distribution,
    "applications.Cauchy",
    wns::distribution::RNGConfigCreator);

Cauchy::Cauchy(double median, double sigma, double value, wns::rng::RNGen* rng) :
  Distribution(rng),
  median_(median),
  sigma_(sigma),
  value_(value)
{
}

Cauchy::Cauchy(const pyconfig::View& config) :
  Distribution(),
  median_(config.get<double>("median")),
  sigma_(config.get<double>("sigma")),
  value_(config.get<double>("value"))
{
}

Cauchy::Cauchy(wns::rng::RNGen* rng, const pyconfig::View& config) :
  Distribution(rng),
  median_(config.get<double>("median")),
  sigma_(config.get<double>("sigma")),
  value_(config.get<double>("value"))
{
}

Cauchy::~Cauchy()
{
  delete uniDis;
}

double
Cauchy::operator()()
{
  uniDis = new wns::distribution::Uniform(0.0, 1.0);
  double uniRandomValue = (*uniDis)();

  return  (median_ + sigma_ * tan(M_PI  * ((uniRandomValue/value_) - (1/2))));
}

std::string
Cauchy::paramString() const
{
    std::ostringstream tmp;
    tmp << "applications.Cauchy(median = " << median_ << ", sigma = " << sigma_
        << ", value with the highest %-tile = " << value_ << ")";
    return tmp.str();
}

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