Method Load

src/math/FGFunction.cpp:315–948

//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

void FGFunction::Load(Element* el, FGPropertyValue* var, FGFDMExec* fdmex,
                      const string& Prefix)
{
  Name = el->GetAttributeValue("name");
  Element* element = el->GetElement();

  auto sum = [](const decltype(Parameters)& Parameters)->double {
               double temp = 0.0;

               for (auto p: Parameters)
                 temp += p->GetValue();

               return temp;
             };

  while (element) {
    string operation = element->GetName();

    // data types
    if (operation == "property" || operation == "p") {
      string property_name = element->GetDataLine();

      if (var && simgear::strutils::strip(property_name) == "#")
        Parameters.push_back(var);
      else {
        if (property_name.find("#") != string::npos) {
          if (is_number(Prefix)) {
            property_name = replace(property_name,"#",Prefix);
          }
          else {
            XMLLogException err(element);
            err << LogFormat::RED << "Illegal use of the special character '#'\n"
                << LogFormat::RESET;
            throw err;
          }
        }

        if (element->HasAttribute("apply")) {
          string function_str = element->GetAttributeValue("apply");
          auto f = fdmex->GetTemplateFunc(function_str);
          if (f)
            Parameters.push_back(new FGFunctionValue(property_name,
                                                     PropertyManager, f, element));
          else {
            FGXMLLogging log(element, LogLevel::ERROR);
            log << LogFormat::RED << LogFormat::BOLD
                << "  No function by the name " << function_str
                << " has been defined. This property will "
                << "not be logged. You should check your configuration file.\n"
                << LogFormat::RESET;
          }
        }
        else
          Parameters.push_back(new FGPropertyValue(property_name,
                                                   PropertyManager, element));
      }
    } else if (operation == "value" || operation == "v") {
      Parameters.push_back(new FGRealValue(element->GetDataAsNumber()));