mirror of
https://github.com/IfcOpenShell/IfcOpenShell.git
synced 2026-08-11 02:02:22 +00:00
Thomas Krijnen
58 lines
2.5 KiB
C++
58 lines
2.5 KiB
C++
/********************************************************************************
|
|
* *
|
|
* This file is part of IfcOpenShell. *
|
|
* *
|
|
* IfcOpenShell is free software: you can redistribute it and/or modify *
|
|
* it under the terms of the Lesser GNU General Public License as published by *
|
|
* the Free Software Foundation, either version 3.0 of the License, or *
|
|
* (at your option) any later version. *
|
|
* *
|
|
* IfcOpenShell 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 *
|
|
* Lesser GNU General Public License for more details. *
|
|
* *
|
|
* You should have received a copy of the Lesser GNU General Public License *
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>. *
|
|
* *
|
|
********************************************************************************/
|
|
|
|
#ifndef IFCSIPREFIX
|
|
#define IFCSIPREFIX
|
|
|
|
#include "ifc_parse_api.h"
|
|
|
|
#include <string>
|
|
|
|
namespace ifcopenshell {
|
|
IFC_PARSE_API double si_prefix_to_value(const std::string& prefix);
|
|
|
|
template <typename Schema>
|
|
double get_SI_equivalent(const typename Schema::IfcNamedUnit& named_unit) {
|
|
double scale = 1.;
|
|
typename Schema::IfcSIUnit si_unit;
|
|
|
|
if (auto conv_unit = named_unit.template as<typename Schema::IfcConversionBasedUnit>()) {
|
|
auto factor = conv_unit.ConversionFactor();
|
|
auto component = factor.UnitComponent();
|
|
if (si_unit = component.concrete().template as<typename Schema::IfcSIUnit>()) {
|
|
auto value = factor.ValueComponent();
|
|
scale = value.get_attribute_value(0);
|
|
}
|
|
} else {
|
|
si_unit = named_unit.template as<typename Schema::IfcSIUnit>();
|
|
}
|
|
if (si_unit) {
|
|
if (si_unit.Prefix()) {
|
|
scale *= si_prefix_to_value(Schema::IfcSIPrefix::ToString(*si_unit.Prefix()));
|
|
}
|
|
} else {
|
|
scale = 0.;
|
|
}
|
|
|
|
return scale;
|
|
}
|
|
} // namespace ifcopenshell
|
|
|
|
#endif
|