LauBlind.cc

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// Copyright University of Warwick 2006 - 2015.
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)

// Authors:
// Thomas Latham
// John Back
// Paul Harrison

#include "LauBlind.hh"

#include "TMath.h"
#include "TRandom3.h"

ClassImp(LauBlind)


LauBlind::LauBlind() :
        blindingString_(""),
        blindingWidth_(0.0),
        offset_(0.0)
{
}

LauBlind::LauBlind(const TString& blindingStr, const Double_t width) :
        blindingString_(blindingStr),
        blindingWidth_(width),
        offset_(0.0)
{
        this->calcOffset();
}

LauBlind::LauBlind(const LauBlind& rhs) :
        blindingString_(rhs.blindingString_),
        blindingWidth_(rhs.blindingWidth_),
        offset_(rhs.offset_)
{
}

LauBlind::~LauBlind()
{
}

void LauBlind::calcOffset()
{
        //hash the blinding string to obtain a seed
        TRandom3 r(TMath::Hash(blindingString_));

        //offsets are Gaussian distributed with defined width
        offset_ = blindingWidth_ * r.Gaus();
}