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Create a compsolid shape for an extrusion of a IfcCompositeProfileDef and process the opening subtraction individually

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This commit is contained in:
Thomas Krijnen
2014-07-24 11:22:31 +00:00
parent 9a1c7af953
commit cf2e82e8f5
2 changed files with 83 additions and 17 deletions
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src/ifcgeom/IfcGeomFunctions.cpp
+53 -15
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@@ -208,27 +208,65 @@ bool IfcGeom::convert_openings(const IfcSchema::IfcProduct* entity, const IfcSch
Logger::Message(Logger::LOG_WARNING,"Empty opening for:",entity->entity);
original_shape_volume = shape_volume(entity_shape);
}
BRepAlgoAPI_Cut brep_cut(entity_shape,opening_shape);
if ( brep_cut.IsDone() ) {
TopoDS_Shape brep_cut_result = brep_cut;
if (entity_shape.ShapeType() == TopAbs_COMPSOLID) {
// For compound solids process the subtraction for the constituent
// solids individually and write the result back as a compound solid.
TopoDS_CompSolid compound;
BRep_Builder builder;
builder.MakeCompSolid(compound);
TopExp_Explorer exp(entity_shape, TopAbs_SOLID);
for (; exp.More(); exp.Next()) {
BRepAlgoAPI_Cut brep_cut(exp.Current(), opening_shape);
bool added = false;
if ( brep_cut.IsDone() ) {
TopoDS_Shape brep_cut_result = brep_cut;
BRepCheck_Analyzer analyser(brep_cut_result);
bool is_valid = analyser.IsValid() != 0;
if (is_valid) {
TopExp_Explorer exp(brep_cut_result, TopAbs_SOLID);
for (; exp.More(); exp.Next()) {
builder.Add(compound, exp.Current());
added = true;
}
}
}
if (!added) {
// Add the original in case subtraction fails
builder.Add(compound, exp.Current());
} else {
Logger::Message(Logger::LOG_ERROR,"Failed to process subtraction:",entity->entity);
}
}
entity_shape = compound;
} else {
BRepAlgoAPI_Cut brep_cut(entity_shape,opening_shape);
if ( brep_cut.IsDone() ) {
TopoDS_Shape brep_cut_result = brep_cut;
BRepCheck_Analyzer analyser(brep_cut_result);
bool is_valid = analyser.IsValid() != 0;
if ( is_valid ) {
entity_shape = brep_cut;
if ( Logger::Verbosity() >= Logger::LOG_WARNING ) {
const double volume_after_subtraction = shape_volume(entity_shape);
BRepCheck_Analyzer analyser(brep_cut_result);
bool is_valid = analyser.IsValid() != 0;
if ( is_valid ) {
entity_shape = brep_cut;
if ( Logger::Verbosity() >= Logger::LOG_WARNING ) {
const double volume_after_subtraction = shape_volume(entity_shape);
if ( ALMOST_THE_SAME(original_shape_volume,volume_after_subtraction) )
Logger::Message(Logger::LOG_WARNING,"Subtraction yields unchanged volume:",entity->entity);
if ( ALMOST_THE_SAME(original_shape_volume,volume_after_subtraction) )
Logger::Message(Logger::LOG_WARNING,"Subtraction yields unchanged volume:",entity->entity);
}
} else {
Logger::Message(Logger::LOG_ERROR,"Invalid result from subtraction:",entity->entity);
}
} else {
Logger::Message(Logger::LOG_ERROR,"Invalid result from subtraction:",entity->entity);
Logger::Message(Logger::LOG_ERROR,"Failed to process subtraction:",entity->entity);
}
} else {
Logger::Message(Logger::LOG_ERROR,"Failed to process subtraction:",entity->entity);
}
}