G4Trd.hh

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// $Id$
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// 
// --------------------------------------------------------------------
// GEANT 4 class header file
//
//
// G4Trd
//
// Class description:
//
//   A G4Trd is a trapezoid with the x and y dimensions varying along z
//   functions:
//
//   Member Data:
//
//     fDx1    Half-length along x at the surface positioned at -dz
//     fDx2    Half-length along x at the surface positioned at +dz
//     fDy1    Half-length along y at the surface positioned at -dz
//     fDy2    Half-length along y at the surface positioned at +dz
//     fDz     Half-length along z axis
 
// History:
// 12.01.95 P.Kent: Old prototype code converted to thick geometry
// 17.02.95 P.Kent: Exiting normal return
// 19.08.96 P.Kent, V.Grichine: Fs in accordance with G4Box
// 21.04.97 J.Apostolakis: Added Set Methods
// 19.11.99 V.Grichine: kUndefined was added to Eside enum 
// --------------------------------------------------------------------
 
#ifndef G4TRD_HH
#define G4TRD_HH
 
#include "G4CSGSolid.hh"
 
class G4Trd : public G4CSGSolid 
{
  public:  // with description
 
    G4Trd( const G4String& pName,
                 G4double pdx1, G4double pdx2,
                 G4double pdy1, G4double pdy2,
                 G4double pdz );
      //
      // Constructs a trapezoid with name, and half lengths
 
   ~G4Trd();
      //
      // Destructor
 
    // Accessors
 
    inline G4double GetXHalfLength1() const;
    inline G4double GetXHalfLength2() const;
    inline G4double GetYHalfLength1() const;
    inline G4double GetYHalfLength2() const;
    inline G4double GetZHalfLength()  const;
 
    // Modifiers
 
    inline void SetXHalfLength1(G4double val);
    inline void SetXHalfLength2(G4double val);
    inline void SetYHalfLength1(G4double val);
    inline void SetYHalfLength2(G4double val);
    inline void SetZHalfLength(G4double val);
 
    // Methods of solid
 
    inline G4double GetCubicVolume();
    inline G4double GetSurfaceArea();
 
    void ComputeDimensions(       G4VPVParameterisation* p,
                            const G4int n,
                            const G4VPhysicalVolume* pRep );
 
    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 CheckAndSetAllParameters ( G4double pdx1, G4double pdx2,
                                    G4double pdy1, G4double pdy2,
                                    G4double pdz );
 
    void SetAllParameters ( G4double pdx1, G4double pdx2,
                            G4double pdy1, G4double pdy2,
                            G4double pdz );
 
    G4GeometryType GetEntityType() const;
 
    G4ThreeVector GetPointOnSurface() const; 
 
    G4VSolid* Clone() const;
 
    std::ostream& StreamInfo( std::ostream& os ) const;
 
    // Visualisation functions
 
    void          DescribeYourselfTo (G4VGraphicsScene& scene) const;
    G4Polyhedron* CreatePolyhedron   () const;
    G4NURBS*      CreateNURBS        () const;
 
  public:  // without description
 
    enum ESide {kUndefined, kPX,kMX,kPY,kMY,kPZ,kMZ};
      // Codes for faces (kPX=plus x face,kMY= minus y face etc)
 
    G4Trd(__void__&);
      // Fake default constructor for usage restricted to direct object
      // persistency for clients requiring preallocation of memory for
      // persistifiable objects.
 
    G4Trd(const G4Trd& rhs);
    G4Trd& operator=(const G4Trd& rhs); 
      // Copy constructor and assignment operator.
 
    G4ThreeVectorList*
    CreateRotatedVertices( const G4AffineTransform& pTransform ) const;
      //
      // Creates the List of transformed vertices in the format required
      // for G4CSGSolid:: ClipCrossSection and ClipBetweenSections
 
    G4ThreeVector ApproxSurfaceNormal( const G4ThreeVector& p ) const;
      // Algorithm for SurfaceNormal() following the original
      // specification for points not on the surface
 
  private:
 
    G4double fDx1,fDx2,fDy1,fDy2,fDz;
};
 
#include "G4Trd.icc"
 
#endif