mirror of
https://github.com/IfcOpenShell/IfcOpenShell.git
synced 2026-08-11 10:06:47 +00:00
Thomas Krijnen
58 lines
2.5 KiB
C++
58 lines
2.5 KiB
C++
/********************************************************************************
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* *
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* This file is part of IfcOpenShell. *
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* *
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* IfcOpenShell is free software: you can redistribute it and/or modify *
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* it under the terms of the Lesser GNU General Public License as published by *
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* the Free Software Foundation, either version 3.0 of the License, or *
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* (at your option) any later version. *
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* *
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* IfcOpenShell is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* Lesser GNU General Public License for more details. *
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* *
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* You should have received a copy of the Lesser GNU General Public License *
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* along with this program. If not, see <http://www.gnu.org/licenses/>. *
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* *
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********************************************************************************/
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#ifndef IFCSIPREFIX
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#define IFCSIPREFIX
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#include "ifc_parse_api.h"
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#include <string>
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namespace ifcopenshell {
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IFC_PARSE_API double si_prefix_to_value(const std::string& prefix);
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template <typename Schema>
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double get_SI_equivalent(const typename Schema::IfcNamedUnit& named_unit) {
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double scale = 1.;
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typename Schema::IfcSIUnit si_unit;
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if (auto conv_unit = named_unit.template as<typename Schema::IfcConversionBasedUnit>()) {
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auto factor = conv_unit.ConversionFactor();
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auto component = factor.UnitComponent();
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if (si_unit = component.concrete().template as<typename Schema::IfcSIUnit>()) {
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auto value = factor.ValueComponent();
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scale = value.get_attribute_value(0);
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}
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} else {
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si_unit = named_unit.template as<typename Schema::IfcSIUnit>();
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}
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if (si_unit) {
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if (si_unit.Prefix()) {
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scale *= si_prefix_to_value(Schema::IfcSIPrefix::ToString(*si_unit.Prefix()));
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}
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} else {
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scale = 0.;
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}
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return scale;
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}
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} // namespace ifcopenshell
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#endif
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