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// $Id: G4TwistTubsSide.hh 67011 2013-01-29 16:17:41Z gcosmo $
//
//
// --------------------------------------------------------------------
// GEANT 4 class header file
//
//
// G4TwistTubsSide
//
// Class description:
//
// Class describing a twisted boundary surface for a cylinder.
// Author:
// 01-Aug-2002 - Kotoyo Hoshina (hoshina@hepburn.s.chiba-u.ac.jp)
//
// History:
// 13-Nov-2003 - O.Link (Oliver.Link@cern.ch), Integration in Geant4
// from original version in Jupiter-2.5.02 application.
// --------------------------------------------------------------------
#ifndef __G4TWISTTUBSSIDE__
#define __G4TWISTTUBSSIDE__
#include "G4VTwistSurface.hh"
class G4TwistTubsSide : public G4VTwistSurface
{
public: // with description
G4TwistTubsSide(const G4String &name,
const G4RotationMatrix &rot, // 0.5*(phi-width segment)
const G4ThreeVector &tlate,
G4int handedness, // R-hand = 1, L-hand = -1
const G4double kappa, // tan(TwistAngle/2)/fZHalfLen
const EAxis axis0 = kXAxis,
const EAxis axis1 = kZAxis,
G4double axis0min = -kInfinity,
G4double axis1min = -kInfinity,
G4double axis0max = kInfinity,
G4double axis1max = kInfinity );
G4TwistTubsSide(const G4String &name,
G4double EndInnerRadius[2],
G4double EndOuterRadius[2],
G4double DPhi,
G4double EndPhi[2],
G4double EndZ[2],
G4double InnerRadius,
G4double OuterRadius,
G4double Kappa,
G4int handedness);
virtual ~G4TwistTubsSide();
virtual G4ThreeVector GetNormal(const G4ThreeVector &xx,
G4bool isGlobal = false) ;
virtual G4int DistanceToSurface(const G4ThreeVector &gp,
const G4ThreeVector &gv,
G4ThreeVector gxx[],
G4double distance[],
G4int areacode[],
G4bool isvalid[],
EValidate validate = kValidateWithTol);
virtual G4int DistanceToSurface(const G4ThreeVector &gp,
G4ThreeVector gxx[],
G4double distance[],
G4int areacode[]);
inline G4ThreeVector ProjectAtPXPZ(const G4ThreeVector &p,
G4bool isglobal = false) const ;
virtual G4ThreeVector SurfacePoint(G4double, G4double,
G4bool isGlobal = false) ;
virtual G4double GetBoundaryMin(G4double phi) ;
virtual G4double GetBoundaryMax(G4double phi) ;
virtual G4double GetSurfaceArea() ;
virtual void GetFacets( G4int m, G4int n, G4double xyz[][3],
G4int faces[][4], G4int iside ) ;
public: // without description
G4TwistTubsSide(__void__&);
// Fake default constructor for usage restricted to direct object
// persistency for clients requiring preallocation of memory for
// persistifiable objects.
private:
virtual G4double DistanceToPlane(const G4ThreeVector &p,
const G4ThreeVector &A,
const G4ThreeVector &B,
const G4ThreeVector &C,
const G4ThreeVector &D,
const G4int parity,
G4ThreeVector &xx,
G4ThreeVector &n);
virtual G4int GetAreaCode(const G4ThreeVector &xx,
G4bool withTol = true);
virtual void SetCorners();
virtual void SetCorners( G4double endInnerRad[2],
G4double endOuterRad[2],
G4double endPhi[2],
G4double endZ[2] ) ;
virtual void SetBoundaries();
private:
G4double fKappa; // std::tan(TwistedAngle/2)/HalfLenZ;
};
//========================================================
// inline functions
//========================================================
inline
G4ThreeVector G4TwistTubsSide::ProjectAtPXPZ(const G4ThreeVector &p,
G4bool isglobal) const
{
// Get Rho at p.z() on Hyperbolic Surface.
G4ThreeVector tmpp;
if (isglobal) {
tmpp = fRot.inverse()*p - fTrans;
} else {
tmpp = p;
}
G4ThreeVector xx(p.x(), p.x() * fKappa * p.z(), p.z());
if (isglobal) { return (fRot * xx + fTrans); }
return xx;
}
inline
G4ThreeVector
G4TwistTubsSide::SurfacePoint(G4double x, G4double z, G4bool isGlobal)
{
G4ThreeVector SurfPoint( x , x * fKappa * z , z ) ;
if (isGlobal) { return (fRot * SurfPoint + fTrans); }
return SurfPoint;
}
inline
G4double G4TwistTubsSide::GetBoundaryMin(G4double)
{
return fAxisMin[0] ; // inner radius at z = 0
}
inline
G4double G4TwistTubsSide::GetBoundaryMax(G4double)
{
return fAxisMax[0] ; // outer radius at z = 0
}
inline
G4double G4TwistTubsSide::GetSurfaceArea()
{
// approximation only
return ( fAxisMax[0] - fAxisMin[0] ) * ( fAxisMax[1] - fAxisMin[1] ) ;
}
#endif