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22315: Fix the imported shape orientation

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skv 2013-11-20 11:46:04 +00:00
parent 982407874b
commit 1db5860559
1 changed files with 35 additions and 0 deletions
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35
src/STLImport/STLImport.cxx
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@ -25,8 +25,14 @@
#include "utilities.h" #include "utilities.h"
#include <BRep_Builder.hxx>
#include <BRep_Tool.hxx>
#include <BRepClass3d_SolidClassifier.hxx>
#include <Precision.hxx>
#include <StlAPI_Reader.hxx> #include <StlAPI_Reader.hxx>
#include <TCollection_AsciiString.hxx> #include <TCollection_AsciiString.hxx>
#include <TopAbs_ShapeEnum.hxx>
#include <TopoDS.hxx>
#include <TopoDS_Shape.hxx> #include <TopoDS_Shape.hxx>
#include <TDF_Label.hxx> #include <TDF_Label.hxx>
@ -65,6 +71,35 @@ STLIMPORT_EXPORT
if (aShape.IsNull()) { if (aShape.IsNull()) {
theError = "STL Import failed"; theError = "STL Import failed";
} else {
// Fix the orientation of closed shell or solid.
if (BRep_Tool::IsClosed(aShape)) {
TopAbs_ShapeEnum aType = aShape.ShapeType();
if (aType == TopAbs_SHELL || aType == TopAbs_SOLID) {
TopoDS_Solid aSolid;
if (aType == TopAbs_SHELL) {
// Create a solid.
BRep_Builder aBuilder;
aBuilder.MakeSolid(aSolid);
aBuilder.Add(aSolid, aShape);
} else {
aSolid = TopoDS::Solid(aShape);
}
// Classify infinite point against solid.
BRepClass3d_SolidClassifier aClassifier(aSolid);
aClassifier.PerformInfinitePoint(Precision::Confusion());
if (aClassifier.State() == TopAbs_IN) {
// The shape is inverted. Reverse it.
aShape.Reverse();
}
}
}
} }
return aShape; return aShape;