G4VTwistedFaceted.hh

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// G4VTwistedFaceted
//
// Class description:
//
//  G4VTwistedFaceted is an abstract base class for twisted boxoids:
//  G4TwistedTrd, G4TwistedTrap and G4TwistedBox
 
// Author: 27-Oct-2004 - O.Link (CERN)
// --------------------------------------------------------------------
#ifndef G4VTWISTEDFACETED_HH
#define G4VTWISTEDFACETED_HH 1
 
#include "G4VSolid.hh"
#include "G4TwoVector.hh"
#include "G4TwistTrapAlphaSide.hh"
#include "G4TwistTrapParallelSide.hh"
#include "G4TwistBoxSide.hh"
#include "G4TwistTrapFlatSide.hh"
 
class G4SolidExtentList;
class G4ClippablePolygon;
 
class G4VTwistedFaceted: public G4VSolid
{
  public:
 
    G4VTwistedFaceted(const G4String& pname,    // Name of instance
                            G4double PhiTwist,  // twist angle
                            G4double pDz,       // half z lenght
                            G4double pTheta,  // direction between end planes
                            G4double pPhi,    // defined by polar & azim. angles
                            G4double pDy1,    // half y length at -pDz
                            G4double pDx1,    // half x length at -pDz,-pDy
                            G4double pDx2,    // half x length at -pDz,+pDy
                            G4double pDy2,    // half y length at +pDz
                            G4double pDx3,    // half x length at +pDz,-pDy
                            G4double pDx4,    // half x length at +pDz,+pDy
                            G4double pAlph    // tilt angle at +pDz
                     );
 
    ~G4VTwistedFaceted() override;
 
    void ComputeDimensions(      G4VPVParameterisation*,
                           const G4int,
                           const G4VPhysicalVolume*  ) override;
 
    void BoundingLimits(G4ThreeVector &pMin, G4ThreeVector &pMax) const override;
 
    G4bool CalculateExtent(const EAxis              pAxis,
                           const G4VoxelLimits&     pVoxelLimit,
                           const G4AffineTransform& pTransform,
                                 G4double&          pMin,
                                 G4double&          pMax ) const override;
 
    G4double DistanceToIn (const G4ThreeVector& p,
                           const G4ThreeVector& v ) const override;
 
    G4double DistanceToIn (const G4ThreeVector& p ) const override;
 
    G4double DistanceToOut(const G4ThreeVector& p,
                           const G4ThreeVector& v,
                           const G4bool         calcnorm  = false,
                                 G4bool* validnorm = nullptr,
                                 G4ThreeVector*  n = nullptr ) const override;
 
    G4double DistanceToOut(const G4ThreeVector& p) const override;
 
    EInside Inside (const G4ThreeVector& p) const override;
 
    G4ThreeVector SurfaceNormal(const G4ThreeVector& p) const override;
 
    G4ThreeVector GetPointOnSurface() const override;
    G4ThreeVector GetPointInSolid(G4double z) const;
 
    G4double GetCubicVolume() override;
    G4double GetSurfaceArea() override;
 
    void DescribeYourselfTo (G4VGraphicsScene& scene) const override;
    G4Polyhedron* CreatePolyhedron   () const override;
    G4Polyhedron* GetPolyhedron      () const override;
 
    std::ostream &StreamInfo(std::ostream& os) const override;
 
    // accessors
 
    inline G4double GetTwistAngle() const { return fPhiTwist; }
 
    inline G4double GetDx1   () const { return fDx1   ; }
    inline G4double GetDx2   () const { return fDx2   ; }
    inline G4double GetDx3   () const { return fDx3   ; }
    inline G4double GetDx4   () const { return fDx4   ; }
    inline G4double GetDy1   () const { return fDy1   ; }
    inline G4double GetDy2   () const { return fDy2   ; }
    inline G4double GetDz    () const { return fDz    ; }
    inline G4double GetPhi   () const { return fPhi   ; }
    inline G4double GetTheta () const { return fTheta ; }
    inline G4double GetAlpha () const { return fAlph  ; }
 
    inline G4double Xcoef(G4double u, G4double phi, G4double ftg) const;
      // For calculating the w(u) function
 
    inline G4double GetValueA(G4double phi) const;
    inline G4double GetValueB(G4double phi) const;
    inline G4double GetValueD(G4double phi) const;
 
    G4VisExtent     GetExtent    () const override;
    G4GeometryType  GetEntityType() const override;
 
    G4VTwistedFaceted(__void__&);
      // Fake default constructor for usage restricted to direct object
      // persistency for clients requiring preallocation of memory for
      // persistifiable objects.
 
    G4VTwistedFaceted(const G4VTwistedFaceted& rhs);
    G4VTwistedFaceted& operator=(const G4VTwistedFaceted& rhs);
      // Copy constructor and assignment operator.
 
  protected:
 
    mutable G4bool fRebuildPolyhedron = false;
    mutable G4Polyhedron* fpPolyhedron = nullptr;  // polyhedron for vis
 
    G4double fCubicVolume = 0.0; // volume of the solid
    G4double fSurfaceArea = 0.0; // area of the solid
 
  private:
 
    double GetLateralFaceArea(const G4TwoVector& p1,
                              const G4TwoVector& p2,
                              const G4TwoVector& p3,
                              const G4TwoVector& p4) const;
    void CreateSurfaces();
 
  private:
 
    G4double fTheta;
    G4double fPhi ;
 
    G4double fDy1;
    G4double fDx1;
    G4double fDx2;
 
    G4double fDy2;
    G4double fDx3;
    G4double fDx4;
 
    G4double fDz;        // Half-length along the z axis
 
    G4double fDx ;       // maximum side in x
    G4double fDy ;       // maximum side in y
 
    G4double fAlph ;
    G4double fTAlph ;    // std::tan(fAlph)
 
    G4double fdeltaX ;
    G4double fdeltaY ;
 
    G4double fPhiTwist;  // twist angle ( dphi in surface equation)
 
    G4VTwistSurface* fLowerEndcap ;  // surface of -ve z
    G4VTwistSurface* fUpperEndcap ;  // surface of +ve z
 
    G4VTwistSurface* fSide0 ;    // Twisted Side at phi = 0 deg
    G4VTwistSurface* fSide90 ;   // Twisted Side at phi = 90 deg
    G4VTwistSurface* fSide180 ;  // Twisted Side at phi = 180 deg
    G4VTwistSurface* fSide270 ;  // Twisted Side at phi = 270 deg
 
};
 
//=====================================================================
 
inline
G4double G4VTwistedFaceted::GetValueA(G4double phi) const
{
  return ( fDx4 + fDx2  + ( fDx4 - fDx2 ) * ( 2 * phi ) / fPhiTwist  ) ;
}
 
inline
G4double G4VTwistedFaceted::GetValueD(G4double phi) const
{
  return ( fDx3 + fDx1  + ( fDx3 - fDx1 ) * ( 2 * phi ) / fPhiTwist  ) ;
}
 
inline
G4double G4VTwistedFaceted::GetValueB(G4double phi) const
{
  return ( fDy2 + fDy1  + ( fDy2 - fDy1 ) * ( 2 * phi ) / fPhiTwist ) ;
}
 
inline
G4double G4VTwistedFaceted::Xcoef(G4double u, G4double phi, G4double ftg) const
{
  return GetValueA(phi)/2. + (GetValueD(phi)-GetValueA(phi))/4.
    - u*( ( GetValueD(phi)-GetValueA(phi) ) / ( 2 * GetValueB(phi) ) - ftg );
}
 
#endif