0019923: EDF 765 SMESH : default values of hypothesis

add access methods to new fields
+  double                     _shapeDiagonal; //!< diagonal size of bounding box of shape to mesh
+  int                        _nbElemPerDiagonal; //!< nb elements per diagonal

src/SMESH/SMESH_Mesh.cxx

@@ -50,7 +50,9 @@
 #include "DriverUNV_R_SMDS_Mesh.h"
 #include "DriverSTL_R_SMDS_Mesh.h"
 
+#include <BRepBndLib.hxx>
 #include <BRepPrimAPI_MakeBox.hxx>
+#include <Bnd_Box.hxx>
 #include <TopExp.hxx>
 #include <TopExp_Explorer.hxx>
 #include <TopTools_ListIteratorOfListOfShape.hxx>
@@ -95,6 +97,7 @@ SMESH_Mesh::SMESH_Mesh(int               theLocalId,
   _myMeshDS      = theDocument->GetMesh(_idDoc);
   _isShapeToMesh = false;
   _isAutoColor   = false;
+  _shapeDiagonal = 0.0;
   _myMeshDS->ShapeToMesh( PseudoShape() );
 }
 
@@ -155,6 +158,8 @@ void SMESH_Mesh::ShapeToMesh(const TopoDS_Shape & aShape)
     // clear SMESHDS
     TopoDS_Shape aNullShape;
     _myMeshDS->ShapeToMesh( aNullShape );
+
+    _shapeDiagonal = 0.0;
   }
 
   // set a new geometry
@@ -202,6 +207,33 @@ const TopoDS_Solid& SMESH_Mesh::PseudoShape()
   return aSolid;
 }
 
+//=======================================================================
+/*!
+ * \brief Return diagonal size of bounding box of a shape
+ */
+//=======================================================================
+
+double SMESH_Mesh::GetShapeDiagonalSize(const TopoDS_Shape & aShape)
+{
+  Bnd_Box Box;
+  BRepBndLib::Add(aShape, Box);
+  return sqrt( Box.SquareExtent() );
+}
+
+//=======================================================================
+/*!
+ * \brief Return diagonal size of bounding box of shape to mesh
+ */
+//=======================================================================
+
+double SMESH_Mesh::GetShapeDiagonalSize() const
+{
+  if ( _shapeDiagonal == 0. && _isShapeToMesh )
+    const_cast<SMESH_Mesh*>(this)->_shapeDiagonal = GetShapeDiagonalSize( GetShapeToMesh() );
+
+  return _shapeDiagonal;
+}
+
 //=======================================================================
 /*!
  * \brief Remove all nodes and elements

src/SMESH/SMESH_Mesh.hxx

@@ -76,6 +76,14 @@ public:
    * \brief Return true if there is a geometry to be meshed, not PseudoShape()
    */
   bool HasShapeToMesh() const { return _isShapeToMesh; }
+  /*!
+   * \brief Return diagonal size of bounding box of shape to mesh.
+   */
+  double GetShapeDiagonalSize() const;
+  /*!
+   * \brief Return diagonal size of bounding box of a shape.
+   */
+  static double GetShapeDiagonalSize(const TopoDS_Shape & aShape);
   /*!
    * \brief Return a solid which is returned by GetShapeToMesh() if
    *        a real geometry to be meshed was not set
@@ -122,6 +130,10 @@ public:
                     std::list <const SMESHDS_Hypothesis * >& aHypList,
                     const bool                               andAncestors) const;
 
+  void SetNbElementsPerDiagonal(int nb) { _nbElemPerDiagonal = nb ;}
+
+  int GetNbElementsPerDiagonal() { return _nbElemPerDiagonal; }
+
   const std::list<SMESHDS_Command*> & GetLog() throw(SALOME_Exception);
   
   void ClearLog() throw(SALOME_Exception);
@@ -261,6 +273,9 @@ protected:
 
   bool                       _isAutoColor;
 
+  double                     _shapeDiagonal; //!< diagonal size of bounding box of shape to mesh
+  int                        _nbElemPerDiagonal; //!< nb elements per diagonal
+  
   TopTools_IndexedDataMapOfShapeListOfShape _mapAncestors;
 
 protected: