UniformGenerator.cc

/*
 *  MoMEMta: a modular implementation of the Matrix Element Method
 *  Copyright (C) 2016  Universite catholique de Louvain (UCL), Belgium
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <momemta/ParameterSet.h>
#include <momemta/Module.h>

class UniformGenerator: public Module {
    public:

        UniformGenerator(PoolPtr pool, const ParameterSet& parameters): Module(pool, parameters.getModuleName()),
            m_min(parameters.get<double>("min")),
            m_max(parameters.get<double>("max")) {

            m_ps_point = get<double>(parameters.get<InputTag>("ps_point"));
        };

        virtual Status work() override {
            double psPoint = *m_ps_point;
            *output = m_min + (m_max - m_min) * psPoint;
            *jacobian = m_max - m_min;

            return Status::OK;
        }

    private:
        const double m_min, m_max;

        // Inputs
        Value<double> m_ps_point;

        // Outputs
        std::shared_ptr<double> output = produce<double>("output");
        std::shared_ptr<double> jacobian = produce<double>("jacobian");


};

REGISTER_MODULE(UniformGenerator)
        .Input("ps_point")
        .Output("output")
        .Output("jacobian")
        .Attr("min:double")
        .Attr("max:double");