histogram.hpp

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// Copyright 2015 TIER IV, Inc. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
 
#ifndef OPENSCENARIO_INTERPRETER__SYNTAX__HISTOGRAM_HPP_
#define OPENSCENARIO_INTERPRETER__SYNTAX__HISTOGRAM_HPP_
 
#include <openscenario_interpreter/scope.hpp>
#include <openscenario_interpreter/syntax/histogram_bin.hpp>
#include <random>
 
namespace openscenario_interpreter
{
inline namespace syntax
{
/*
   Histogram (OpenSCENARIO XML 1.3.1)
 
   Histogram which can be applied to a single parameter.
 
   <xsd:complexType name="Histogram">
     <xsd:sequence>
       <xsd:element name="Bin" type="HistogramBin" maxOccurs="unbounded"/>
     </xsd:sequence>
   </xsd:complexType>
*/
struct Histogram : public ComplexType, private Scope
{
  const std::list<HistogramBin> bins;
 
  struct BinAdaptor
  {
    explicit BinAdaptor(const std::list<HistogramBin> & bins)
    {
      intervals.emplace_back(bins.front().range.lower_limit.data);
      for (const auto & bin : bins) {
        intervals.emplace_back(bin.range.lower_limit.data);
        densities.emplace_back(bin.weight.data);
      }
      intervals.emplace_back(bins.back().range.upper_limit.data);
    }
    std::vector<double> intervals, densities;
  } bin_adaptor;
 
  std::piecewise_constant_distribution<Double::value_type> distribute;
 
  std::mt19937 random_engine;
 
  explicit Histogram(const pugi::xml_node &, Scope & scope);
 
  auto evaluate() -> Object;
};
}  // namespace syntax
}  // namespace openscenario_interpreter
#endif  // OPENSCENARIO_INTERPRETER__SYNTAX__HISTOGRAM_HPP_