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  #include "../ForwardTranslator.hpp"
  
  #include "../../model/GasMixture.hpp"
  
  #include "../../utilities/idf/IdfExtensibleGroup.hpp"
  #include <utilities/idd/WindowMaterial_GasMixture_FieldEnums.hxx>
  #include "../../utilities/idd/IddEnums.hpp"
  #include <utilities/idd/IddEnums.hxx>
  
  using namespace openstudio::model;
  
  namespace openstudio {
  
  namespace energyplus {
  
    boost::optional<IdfObject> ForwardTranslator::translateGasMixture(GasMixture& modelObject) {
      IdfObject idfObject(openstudio::IddObjectType::WindowMaterial_GasMixture);
  
      m_idfObjects.push_back(idfObject);
  
      idfObject.setString(WindowMaterial_GasMixtureFields::Name, modelObject.name().get());
  
      idfObject.setDouble(WindowMaterial_GasMixtureFields::Thickness, modelObject.thickness());
  
      idfObject.setInt(WindowMaterial_GasMixtureFields::NumberofGasesinMixture, modelObject.numGases());
  
      int fieldIndex = WindowMaterial_GasMixtureFields::Gas1Type;
      for (unsigned gasIndex = 0; gasIndex < modelObject.numGases(); ++gasIndex) {
  
        idfObject.setString(fieldIndex++, modelObject.getGasType(gasIndex));
  
        idfObject.setDouble(fieldIndex++, modelObject.getGasFraction(gasIndex));
      }
  
      return boost::optional<IdfObject>(idfObject);
    }
  
  }  // namespace energyplus
  
  }  // namespace openstudio
  