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initialize units in mapping

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This commit is contained in:
Thomas Krijnen
2019-09-01 09:18:29 +02:00
parent 64ee3e9af3
commit ca2a4f243d
2 changed files with 75 additions and 1 deletions
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src/ifcgeom/schema/mapping.cpp
+68
View File
@@ -841,3 +841,71 @@ std::map<std::string, IfcUtil::IfcBaseEntity*> mapping::get_layers(IfcUtil::IfcB
}
return layers;
}
#include "../../ifcparse/IfcSIPrefix.h"
void mapping::initialize_units_() {
// Set default units, set length to meters, angles to undefined
length_unit_ = 1.;
angle_unit_ = -1.;
length_unit_name_ = "METER";
auto unit_assignments = file_->instances_by_type<IfcSchema::IfcUnitAssignment>();
if (unit_assignments->size() != 1) {
Logger::Warning("Not a single unit assignment in file");
}
auto unit_assignment = *unit_assignments->begin();
bool length_unit_encountered = false, angle_unit_encountered = false;
try {
IfcEntityList::ptr units = unit_assignment->Units();
if (!units || !units->size()) {
Logger::Warning("No unit information found");
} else {
for (IfcEntityList::it it = units->begin(); it != units->end(); ++it) {
IfcUtil::IfcBaseClass* base = *it;
if (base->declaration().is(IfcSchema::IfcNamedUnit::Class())) {
IfcSchema::IfcNamedUnit* named_unit = base->as<IfcSchema::IfcNamedUnit>();
if (named_unit->UnitType() == IfcSchema::IfcUnitEnum::IfcUnit_LENGTHUNIT ||
named_unit->UnitType() == IfcSchema::IfcUnitEnum::IfcUnit_PLANEANGLEUNIT) {
std::string current_unit_name;
const double current_unit_magnitude = IfcParse::get_SI_equivalent<IfcSchema>(named_unit);
if (current_unit_magnitude != 0.) {
if (named_unit->declaration().is(IfcSchema::IfcConversionBasedUnit::Class())) {
IfcSchema::IfcConversionBasedUnit* u = (IfcSchema::IfcConversionBasedUnit*)base;
current_unit_name = u->Name();
} else if (named_unit->declaration().is(IfcSchema::IfcSIUnit::Class())) {
IfcSchema::IfcSIUnit* si_unit = named_unit->as<IfcSchema::IfcSIUnit>();
if (si_unit->hasPrefix()) {
current_unit_name = IfcSchema::IfcSIPrefix::ToString(si_unit->Prefix());
}
current_unit_name += IfcSchema::IfcSIUnitName::ToString(si_unit->Name());
}
if (named_unit->UnitType() == IfcSchema::IfcUnitEnum::IfcUnit_LENGTHUNIT) {
length_unit_name_ = current_unit_name;
length_unit_ = current_unit_magnitude;
length_unit_encountered = true;
} else {
angle_unit_ = current_unit_magnitude;
angle_unit_encountered = true;
}
}
}
}
}
}
} catch (const IfcParse::IfcException& ex) {
std::stringstream ss;
ss << "Failed to determine unit information '" << ex.what() << "'";
Logger::Message(Logger::LOG_ERROR, ss.str());
}
if (!length_unit_encountered) {
Logger::Warning("No length unit encountered");
}
if (!angle_unit_encountered) {
Logger::Warning("No plane angle unit encountered");
}
}
src/ifcgeom/schema/mapping.h
+7 -1
View File
@@ -16,8 +16,14 @@ namespace geometry {
class POSTFIX_SCHEMA(mapping) : public abstract_mapping {
private:
IfcParse::IfcFile* file_;
double length_unit_, angle_unit_;
std::string length_unit_name_;
void initialize_units_();
public:
POSTFIX_SCHEMA(mapping)(IfcParse::IfcFile* file) : file_(file) {}
POSTFIX_SCHEMA(mapping)(IfcParse::IfcFile* file) : file_(file) {
initialize_units_();
}
virtual ifcopenshell::geometry::taxonomy::item* map(const IfcUtil::IfcBaseClass*);
virtual void get_representations(std::vector<geometry_conversion_task>& tasks, std::vector<filter_t>& filters, settings& s);
virtual std::map<std::string, IfcUtil::IfcBaseEntity*> get_layers(IfcUtil::IfcBaseEntity*);