0028715: Invalid shape produced by reading of attached STEP file. Regression from OCCT-6.9.1 to OCCT-7.0.0.

Corrections: to use fixed shape as result in the non-manifold mode was made.

Regression was due to using modified initial shape as result in the previous version OCCT. At present initial shape is not modified during ShapeProcessing. Therefore modification to use fixed result was made.

Additionally using of nonManifold flag is added to ShapeProcessing.

src/ShapeProcess/ShapeProcess_ShapeContext.hxx

@@ -126,7 +126,17 @@ public:
   //! Prints statistics on Shape Processing onto the current Messenger.
   Standard_EXPORT void PrintStatistics() const;
 
+  //! Set NonManifold flag
+  Standard_EXPORT void SetNonManifold(Standard_Boolean theNonManifold)
+  {
+      myNonManifold = theNonManifold;
+  }
 
+  //! Get NonManifold flag
+  Standard_EXPORT Standard_Boolean IsNonManifold()
+  {
+      return myNonManifold;
+  }
 
 
   DEFINE_STANDARD_RTTIEXT(ShapeProcess_ShapeContext,ShapeProcess_Context)
@@ -144,7 +154,7 @@ private:
   TopTools_DataMapOfShapeShape myMap;
   Handle(ShapeExtend_MsgRegistrator) myMsg;
   TopAbs_ShapeEnum myUntil;
-
+  Standard_Boolean myNonManifold;
 
 };