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#28

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This commit is contained in:
Thomas Krijnen
2016-05-24 13:50:50 +02:00
parent 85ddae1228
commit 38d1ec7a78
4 changed files with 71 additions and 37 deletions
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src/ifcparse/IfcSIPrefix.cpp
+27
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@@ -36,4 +36,31 @@ double IfcParse::IfcSIPrefixToValue(IfcSchema::IfcSIPrefix::IfcSIPrefix v) {
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;
}