0031336: Modeling data - extend BRepPrimAPI_MakeBox with planar shape creation

-Create a new package BRepPreviewAPI, inherited from BRepPrimAPI to create both, valid and degenerative shapes
-Create a new class BRepPreviewAPI_MakeBox for working with a box
    Preview can be vertex, edge, rectangle or box
-BRepPrim_GWedge: in the case of non-valid data, the exception does not happen in the constructor, but at the moment of access to the shape
-BRepPrimAPI_MakeBox: myWedge is now not private, but protected, because used in  BRepPreviewAPI_MakeBox which inherits from BRepPrimAPI_MakeBox
-Add tests for checking of a creation a preview in tests/geometry/preview (vertex, edge, rectangle, box)
-Update a command "box": add new parameters

src/BRepPrim/BRepPrim_GWedge.cxx

@@ -134,6 +134,27 @@ static void BRepPrim_Wedge_Init(Standard_Boolean& S,
     F[i] = Standard_False;
 }
 
+BRepPrim_GWedge::BRepPrim_GWedge() :
+       XMin (0),
+       XMax (0),
+       YMin (0),
+       YMax (0),
+       ZMin (0),
+       ZMax (0),
+       Z2Min (0),
+       Z2Max (0),
+       X2Min (0),
+       X2Max (0)
+{
+  for (Standard_Integer i = 0; i < NBFACES; i++)
+  {
+    myInfinite[i]=Standard_False;
+  }
+
+  BRepPrim_Wedge_Init (ShellBuilt,VerticesBuilt,EdgesBuilt,
+                       WiresBuilt,FacesBuilt);
+}
+
 //=======================================================================
 //function : BRepPrim_GWedge
 //purpose  : build a box
@@ -158,10 +179,7 @@ BRepPrim_GWedge::BRepPrim_GWedge (const BRepPrim_Builder& B,
        X2Max(dx)
 {
   for (Standard_Integer i = 0; i < NBFACES; i++) { myInfinite[i]=Standard_False; }
-  if ( ( dx <= Precision::Confusion() ) ||
-       ( dy <= Precision::Confusion() ) ||
-       ( dz <= Precision::Confusion() ) )
-    throw Standard_DomainError();
+
   BRepPrim_Wedge_Init(ShellBuilt,VerticesBuilt,EdgesBuilt,
 			WiresBuilt,FacesBuilt);
 }
@@ -191,11 +209,7 @@ BRepPrim_GWedge::BRepPrim_GWedge (const BRepPrim_Builder& B,
        X2Max(ltx)
 {
   for (Standard_Integer i = 0; i < NBFACES; i++) { myInfinite[i]=Standard_False; }
-  if ( ( dx <= Precision::Confusion() ) ||
-       ( dy <= Precision::Confusion() ) ||
-       ( dz <= Precision::Confusion() ) ||
-       ( ltx < 0 ) )
-    throw Standard_DomainError();
+
   BRepPrim_Wedge_Init(ShellBuilt,VerticesBuilt,EdgesBuilt,
 			WiresBuilt,FacesBuilt);
 }
@@ -231,12 +245,7 @@ BRepPrim_GWedge::BRepPrim_GWedge (const BRepPrim_Builder& B,
        X2Max(x2max)
 {
   for (Standard_Integer i = 0; i < NBFACES; i++) { myInfinite[i]=Standard_False; }
-  if ( ( XMax-XMin <= Precision::Confusion() ) ||
-       ( YMax-YMin <= Precision::Confusion() ) ||
-       ( ZMax-ZMin <= Precision::Confusion() ) ||
-       ( Z2Max-Z2Min < 0 ) ||
-       ( X2Max-X2Min < 0 ) )
-    throw Standard_DomainError();
+
   BRepPrim_Wedge_Init(ShellBuilt,VerticesBuilt,EdgesBuilt,
 			WiresBuilt,FacesBuilt);
 }
@@ -296,6 +305,9 @@ Standard_Boolean BRepPrim_GWedge::IsInfinite (const BRepPrim_Direction d1) const
 //=======================================================================
 
 const TopoDS_Shell& BRepPrim_GWedge::Shell() {
+  if (IsDegeneratedShape())
+    throw Standard_DomainError();
+
   if (!ShellBuilt) {
     myBuilder.MakeShell(myShell);
 
@@ -1020,3 +1032,19 @@ const TopoDS_Vertex& BRepPrim_GWedge::Vertex
 
 }
 
+//=======================================================================
+//function : IsDegeneratedShape
+//purpose  :
+//=======================================================================
+Standard_Boolean BRepPrim_GWedge::IsDegeneratedShape()
+{
+  if ( ( XMax-XMin <= Precision::Confusion() ) ||
+     ( YMax-YMin <= Precision::Confusion() ) ||
+     ( ZMax-ZMin <= Precision::Confusion() ) ||
+     ( Z2Max-Z2Min < 0 ) ||
+     ( X2Max-X2Min < 0 ) )
+    return Standard_True;
+  else
+    return Standard_False;
+}
+

src/BRepPrim/BRepPrim_GWedge.hxx

@@ -70,6 +70,8 @@ public:
 
   DEFINE_STANDARD_ALLOC
 
+  //! Default constructor
+  Standard_EXPORT BRepPrim_GWedge();
   
   //! Creates a  GWedge  algorithm.   <Axes> is  the axis
   //! system for the primitive.
@@ -191,7 +193,9 @@ public:
   //! <d1><d2><d3> direction.
   Standard_EXPORT gp_Pnt Point (const BRepPrim_Direction d1, const BRepPrim_Direction d2, const BRepPrim_Direction d3);
 
-
+  //! Checkes a shape on degeneracy
+  //! @return TRUE if a shape is degenerated
+  Standard_EXPORT Standard_Boolean IsDegeneratedShape();
 
 
 protected:

src/BRepPrim/BRepPrim_Wedge.hxx

@@ -34,7 +34,9 @@ public:
 
   DEFINE_STANDARD_ALLOC
 
-  
+  //! Default constructor
+  BRepPrim_Wedge() {}
+
   //! Creates a  Wedge  algorithm.   <Axes> is  the axis
   //! system for the primitive.
   //!