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22315: Fix the imported shape orientation
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982407874b
commit
1db5860559
@ -25,8 +25,14 @@
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#include "utilities.h"
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#include <BRep_Builder.hxx>
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#include <BRep_Tool.hxx>
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#include <BRepClass3d_SolidClassifier.hxx>
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#include <Precision.hxx>
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#include <StlAPI_Reader.hxx>
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#include <TCollection_AsciiString.hxx>
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#include <TopAbs_ShapeEnum.hxx>
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#include <TopoDS.hxx>
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#include <TopoDS_Shape.hxx>
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#include <TDF_Label.hxx>
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@ -65,6 +71,35 @@ STLIMPORT_EXPORT
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if (aShape.IsNull()) {
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theError = "STL Import failed";
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} else {
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// Fix the orientation of closed shell or solid.
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if (BRep_Tool::IsClosed(aShape)) {
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TopAbs_ShapeEnum aType = aShape.ShapeType();
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if (aType == TopAbs_SHELL || aType == TopAbs_SOLID) {
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TopoDS_Solid aSolid;
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if (aType == TopAbs_SHELL) {
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// Create a solid.
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BRep_Builder aBuilder;
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aBuilder.MakeSolid(aSolid);
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aBuilder.Add(aSolid, aShape);
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} else {
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aSolid = TopoDS::Solid(aShape);
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}
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// Classify infinite point against solid.
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BRepClass3d_SolidClassifier aClassifier(aSolid);
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aClassifier.PerformInfinitePoint(Precision::Confusion());
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if (aClassifier.State() == TopAbs_IN) {
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// The shape is inverted. Reverse it.
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aShape.Reverse();
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}
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}
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}
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}
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return aShape;
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