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// $Id: G4SubtractionSolid.hh,v 1.9 2006/06/29 18:43:35 gunter Exp $
// GEANT4 tag $Name: geant4-09-02-ref-02 $
//
//
// class G4SubtractionSolid
//
// Class description:
//
// Class for description of subtraction of two CSG solids: A - B.

// History: 
//
// 14.10.98 V.Grichine: first implementation
//
// --------------------------------------------------------------------
#ifndef G4SUBTRACTIONSOLID_HH
#define G4SUBTRACTIONSOLID_HH

#include "G4BooleanSolid.hh"
#include "G4VSolid.hh"

#include "G4RotationMatrix.hh"
#include "G4ThreeVector.hh"
#include "G4Transform3D.hh"
#include "G4AffineTransform.hh"


class G4SubtractionSolid : public G4BooleanSolid
{
  public:  // with description

    G4SubtractionSolid(  const G4String& pName,
                               G4VSolid* pSolidA ,
                               G4VSolid* pSolidB   ) ;

    G4SubtractionSolid(  const G4String& pName,
                               G4VSolid* pSolidA ,
                               G4VSolid* pSolidB ,
                               G4RotationMatrix* rotMatrix,
                         const G4ThreeVector& transVector   ) ;

    G4SubtractionSolid(  const G4String& pName,
                               G4VSolid* pSolidA ,
                               G4VSolid* pSolidB ,
                         const G4Transform3D& transform   ) ;

    virtual ~G4SubtractionSolid() ;

    virtual G4GeometryType  GetEntityType() const ;

  public:  // without description

    G4SubtractionSolid(__void__&);
      // Fake default constructor for usage restricted to direct object
      // persistency for clients requiring preallocation of memory for
      // persistifiable objects.

    G4bool CalculateExtent( const EAxis pAxis,
                            const G4VoxelLimits& pVoxelLimit,
                            const G4AffineTransform& pTransform,
                                  G4double& pMin, G4double& pMax) const ;
       
    EInside Inside( const G4ThreeVector& p ) const ;

    G4ThreeVector SurfaceNormal( const G4ThreeVector& p ) const ;

    G4double DistanceToIn( const G4ThreeVector& p,
                           const G4ThreeVector& v  ) const ;

    G4double DistanceToIn( const G4ThreeVector& p) const ;

    G4double DistanceToOut( const G4ThreeVector& p,
                            const G4ThreeVector& v,
                            const G4bool calcNorm=false,
                                  G4bool *validNorm=0,
                                  G4ThreeVector *n=0   ) const ;

    G4double DistanceToOut( const G4ThreeVector& p ) const ;


    void ComputeDimensions(       G4VPVParameterisation* p,
                            const G4int n,
                            const G4VPhysicalVolume* pRep ) ;
                                   
    void DescribeYourselfTo ( G4VGraphicsScene& scene ) const ;
    G4Polyhedron* CreatePolyhedron () const ;
    G4NURBS*      CreateNURBS      () const ;

};

#endif