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Guess units if none are present and convert back if needed

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This commit is contained in:
Thomas Krijnen
2011-11-02 12:52:35 +00:00
parent d6d3333f9d
commit 4dc0bdbe02
4 changed files with 26 additions and 4 deletions
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src/ifcparse/IfcParse.cpp
+16 -2
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@@ -628,8 +628,22 @@ bool Ifc::Init(IfcParse::File* f) {
if ( unit_assignments->Size() ) {
Ifc2x3::IfcUnitAssignment::ptr unit_assignment = *unit_assignments->begin();
units = unit_assignment->Units();
}
if ( ! units ) return true;
}
if ( ! units ) {
// No units eh... Since tolerances and deflection are specified internally in meters
// we will try to find another indication of the model size.
// Note that for IfcTrimmedCurves to render correctly, IfcParameterValues better be
// in radians or IfcOpenShell would not know what to make of them.
Ifc2x3::IfcExtrudedAreaSolid::list extrusions = EntitiesByType<Ifc2x3::IfcExtrudedAreaSolid>();
if ( ! extrusions->Size() ) return true;
float max_height = -1.0f;
for ( Ifc2x3::IfcExtrudedAreaSolid::it it = extrusions->begin(); it != extrusions->end(); ++ it ) {
const float depth = (*it)->Depth();
if ( depth > max_height ) max_height = depth;
}
if ( max_height > 100.0f ) Ifc::LengthUnit = 0.001f;
return true;
}
try {
for ( IfcUtil::IfcAbstractSelect::it it = units->begin(); it != units->end(); ++ it ) {
const IfcUtil::IfcAbstractSelect::ptr base = *it;