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 (Oliver.Link@cern.ch)
// --------------------------------------------------------------------
#ifndef G4VTWISTEDFACETED_HH
#define G4VTWISTEDFACETED_HH
 
#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:  // with description
 
  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
                   );
 
  virtual ~G4VTwistedFaceted();
 
  virtual void ComputeDimensions(G4VPVParameterisation*,
                                 const G4int,
                                 const G4VPhysicalVolume*  );
 
  virtual void BoundingLimits(G4ThreeVector &pMin, G4ThreeVector &pMax) const;
 
  virtual G4bool CalculateExtent(const EAxis              pAxis,
                                 const G4VoxelLimits&     pVoxelLimit,
                                 const G4AffineTransform& pTransform,
                                       G4double&          pMin,
                                       G4double&          pMax ) const;
 
  virtual G4double DistanceToIn (const G4ThreeVector& p,
                                 const G4ThreeVector& v ) const;
 
  virtual G4double DistanceToIn (const G4ThreeVector& p ) const;
 
  virtual G4double DistanceToOut(const G4ThreeVector& p,
                                 const G4ThreeVector& v,
                                 const G4bool         calcnorm  = false,
                                       G4bool* validnorm = nullptr,
                                       G4ThreeVector*  n = nullptr ) const;
 
  virtual G4double DistanceToOut(const G4ThreeVector& p) const;
 
  virtual EInside Inside (const G4ThreeVector& p) const;
 
  virtual G4ThreeVector SurfaceNormal(const G4ThreeVector& p) const;
 
  G4ThreeVector GetPointOnSurface() const;
  G4ThreeVector GetPointInSolid(G4double z) const;
 
  virtual G4double GetCubicVolume();
  virtual G4double GetSurfaceArea();
 
  virtual void DescribeYourselfTo (G4VGraphicsScene& scene) const;
  virtual G4Polyhedron* CreatePolyhedron   () const;
  virtual G4Polyhedron* GetPolyhedron      () const;
 
  virtual std::ostream &StreamInfo(std::ostream& os) const;
 
  // 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;
 
  virtual G4VisExtent     GetExtent    () const;
  virtual G4GeometryType  GetEntityType() const;
 
 public:  // without description
 
  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:  // with description
 
  mutable G4bool fRebuildPolyhedron = false;
  mutable G4Polyhedron* fpPolyhedron = nullptr;  // polyhedron for vis
 
 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
 
 protected:
 
  G4double fCubicVolume = 0.0; // volume of the solid
  G4double fSurfaceArea = 0.0; // area of the solid
 
 private:
 
  class LastState              // last Inside result
  {
    public:
      LastState()
      {
        p.set(kInfinity,kInfinity,kInfinity); inside = kOutside;
      }
      ~LastState(){}
      LastState(const LastState& r) : p(r.p), inside(r.inside){}
      LastState& operator=(const LastState& r)
      {
        if (this == &r)  { return *this; }
        p = r.p; inside = r.inside;
        return *this;
      }
    public:
      G4ThreeVector p;
      EInside       inside;
  };
 
  class LastVector             // last SurfaceNormal result
  {
    public:
      LastVector()
      {
        p.set(kInfinity,kInfinity,kInfinity);
        vec.set(kInfinity,kInfinity,kInfinity);
        surface = new G4VTwistSurface*[1];
      }
      ~LastVector()
      {
        delete [] surface;
      }
      LastVector(const LastVector& r) : p(r.p), vec(r.vec)
      {
        surface = new G4VTwistSurface*[1];
        surface[0] = r.surface[0];
      }
      LastVector& operator=(const LastVector& r)
      {
        if (&r == this)  { return *this; }
        p = r.p; vec = r.vec;
        delete [] surface; surface = new G4VTwistSurface*[1];
        surface[0] = r.surface[0];
        return *this;
      }
    public:
      G4ThreeVector   p;
      G4ThreeVector   vec;
      G4VTwistSurface **surface;
  };
 
  class LastValue              // last G4double value
  {
    public:
      LastValue()
      {
        p.set(kInfinity,kInfinity,kInfinity);
        value = DBL_MAX;
      }
      ~LastValue(){}
      LastValue(const LastValue& r) : p(r.p), value(r.value){}
      LastValue& operator=(const LastValue& r)
      {
        if (this == &r)  { return *this; }
        p = r.p; value = r.value;
        return *this;
      }
    public:
      G4ThreeVector p;
      G4double      value;
  };
 
  class LastValueWithDoubleVector   // last G4double value
  {
    public:
      LastValueWithDoubleVector()
      {
        p.set(kInfinity,kInfinity,kInfinity);
        vec.set(kInfinity,kInfinity,kInfinity);
        value = DBL_MAX;
      }
      ~LastValueWithDoubleVector(){}
      LastValueWithDoubleVector(const LastValueWithDoubleVector& r)
        : p(r.p), vec(r.vec), value(r.value){}
      LastValueWithDoubleVector& operator=(const LastValueWithDoubleVector& r)
      {
        if (this == &r)  { return *this; }
        p = r.p; vec = r.vec; value = r.value;
        return *this;
      }
    public:
      G4ThreeVector p;
      G4ThreeVector vec;
      G4double      value;
  };
 
  LastState    fLastInside;
  LastVector   fLastNormal;
  LastValue    fLastDistanceToIn;
  LastValue    fLastDistanceToOut;
  LastValueWithDoubleVector   fLastDistanceToInWithV;
  LastValueWithDoubleVector   fLastDistanceToOutWithV;
 };
 
//=====================================================================
 
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