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IfcSIPrefix.cpp
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66 lines (62 loc) · 3.58 KB
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/********************************************************************************
* *
* 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/>. *
* *
********************************************************************************/
#include "IfcSIPrefix.h"
double IfcParse::IfcSIPrefixToValue(IfcSchema::IfcSIPrefix::IfcSIPrefix v) {
if ( v == IfcSchema::IfcSIPrefix::IfcSIPrefix_EXA ) return 1.e18;
else if ( v == IfcSchema::IfcSIPrefix::IfcSIPrefix_PETA ) return 1.e15;
else if ( v == IfcSchema::IfcSIPrefix::IfcSIPrefix_TERA ) return 1.e12;
else if ( v == IfcSchema::IfcSIPrefix::IfcSIPrefix_GIGA ) return 1.e9;
else if ( v == IfcSchema::IfcSIPrefix::IfcSIPrefix_MEGA ) return 1.e6;
else if ( v == IfcSchema::IfcSIPrefix::IfcSIPrefix_KILO ) return 1.e3;
else if ( v == IfcSchema::IfcSIPrefix::IfcSIPrefix_HECTO ) return 1.e2;
else if ( v == IfcSchema::IfcSIPrefix::IfcSIPrefix_DECA ) return 1.;
else if ( v == IfcSchema::IfcSIPrefix::IfcSIPrefix_DECI ) return 1.e-1;
else if ( v == IfcSchema::IfcSIPrefix::IfcSIPrefix_CENTI ) return 1.e-2;
else if ( v == IfcSchema::IfcSIPrefix::IfcSIPrefix_MILLI ) return 1.e-3;
else if ( v == IfcSchema::IfcSIPrefix::IfcSIPrefix_MICRO ) return 1.e-6;
else if ( v == IfcSchema::IfcSIPrefix::IfcSIPrefix_NANO ) return 1.e-9;
else if ( v == IfcSchema::IfcSIPrefix::IfcSIPrefix_PICO ) return 1.e-12;
else if ( v == IfcSchema::IfcSIPrefix::IfcSIPrefix_FEMTO ) return 1.e-15;
else if ( v == IfcSchema::IfcSIPrefix::IfcSIPrefix_ATTO ) return 1.e-18;
else return 1.;
}
double IfcParse::get_SI_equivalent(IfcSchema::IfcNamedUnit* named_unit) {
double scale = 1.;
IfcSchema::IfcSIUnit* si_unit = 0;
if (named_unit->is(IfcSchema::Type::IfcConversionBasedUnit)) {
IfcSchema::IfcConversionBasedUnit* conv_unit = named_unit->as<IfcSchema::IfcConversionBasedUnit>();
IfcSchema::IfcMeasureWithUnit* factor = conv_unit->ConversionFactor();
IfcSchema::IfcUnit* component = factor->UnitComponent();
if (component->is(IfcSchema::Type::IfcSIUnit)) {
si_unit = component->as<IfcSchema::IfcSIUnit>();
IfcSchema::IfcValue* v = factor->ValueComponent();
scale = *v->entity->getArgument(0);
}
} else if (named_unit->is(IfcSchema::Type::IfcSIUnit)) {
si_unit = named_unit->as<IfcSchema::IfcSIUnit>();
}
if (si_unit) {
if (si_unit->hasPrefix()) {
scale *= IfcSIPrefixToValue(si_unit->Prefix());
}
} else {
scale = 0.;
}
return scale;
}