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// $Id: G4TwistTubsHypeSide.hh 67011 2013-01-29 16:17:41Z gcosmo $
//
//
// --------------------------------------------------------------------
// GEANT 4 class header file
//
//
// G4TwistTubsHypeSide
//
// Class description:
//
// Class describing a hyperbolic 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 __G4TWISTTUBSHYPESIDE__
#define __G4TWISTTUBSHYPESIDE__
#include "G4VTwistSurface.hh"
#include "G4Integrator.hh"
#include "G4SimpleIntegration.hh"
class G4TwistTubsHypeSide : public G4VTwistSurface
{
public: // with description
G4TwistTubsHypeSide(const G4String &name,
const G4RotationMatrix &rot, // 0.5*(phi-width segment)
const G4ThreeVector &tlate,
const G4int handedness,// R-hand = 1, L-hand = -1
const G4double kappa, // tan(TwistAngle/2)/fZHalfLen
const G4double tanstereo, // tan(stereo angle)
const G4double r0, // radius at z = 0
const EAxis axis0 = kPhi,
const EAxis axis1 = kZAxis,
G4double axis0min = -kInfinity,
G4double axis1min = -kInfinity,
G4double axis0max = kInfinity,
G4double axis1max = kInfinity);
G4TwistTubsHypeSide(const G4String &name,
G4double EndInnerRadius[2],
G4double EndOuterRadius[2],
G4double DPhi,
G4double EndPhi[2],
G4double EndZ[2],
G4double InnerRadius,
G4double OuterRadius,
G4double Kappa,
G4double TanInnerStereo,
G4double TanOuterStereo,
G4int handedness) ;
virtual ~G4TwistTubsHypeSide();
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[]);
virtual G4ThreeVector GetNormal(const G4ThreeVector &xx,
G4bool isGlobal = false) ;
virtual EInside Inside(const G4ThreeVector &gp) ;
virtual G4double GetRhoAtPZ(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
G4TwistTubsHypeSide(__void__&);
// Fake default constructor for usage restricted to direct object
// persistency for clients requiring preallocation of memory for
// persistifiable objects.
private:
virtual G4int GetAreaCode(const G4ThreeVector &xx,
G4bool withTol = true);
virtual G4int GetAreaCodeInPhi(const G4ThreeVector &xx,
G4bool withTol = true);
virtual void SetCorners();
virtual void SetCorners(G4double EndInnerRadius[2],
G4double EndOuterRadius[2],
G4double DPhi,
G4double EndPhi[2],
G4double EndZ[2]);
virtual void SetBoundaries();
private:
G4double fKappa; // std::tan(TwistedAngle/2)/HalfLenZ;
G4double fTanStereo; // std::tan(StereoAngle)
G4double fTan2Stereo; // std::tan(StereoAngle)**2
G4double fR0; // radius at z = 0
G4double fR02; // radius**2 at z = 0
G4double fDPhi ; // segment
class Insidetype
{
public:
G4ThreeVector gp;
EInside inside;
};
Insidetype fInside;
};
//========================================================
// inline functions
//========================================================
inline
G4double G4TwistTubsHypeSide::GetRhoAtPZ(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;
}
return std::sqrt(fR02 + tmpp.z() * tmpp.z() * fTan2Stereo);
}
inline
G4ThreeVector G4TwistTubsHypeSide::
SurfacePoint(G4double phi , G4double z , G4bool isGlobal)
{
G4double rho = std::sqrt(fR02 + z * z * fTan2Stereo) ;
G4ThreeVector SurfPoint (rho*std::cos(phi), rho*std::sin(phi), z) ;
if (isGlobal) { return (fRot * SurfPoint + fTrans); }
return SurfPoint;
}
inline
G4double G4TwistTubsHypeSide::GetBoundaryMin(G4double z)
{
G4ThreeVector ptmp(0,0,z) ; // temporary point with z Komponent only
G4ThreeVector lowerlimit; // lower phi-boundary limit at z = ptmp.z()
lowerlimit = GetBoundaryAtPZ(sAxis0 & sAxisMin, ptmp);
return std::atan2( lowerlimit.y(), lowerlimit.x() ) ;
}
inline
G4double G4TwistTubsHypeSide::GetBoundaryMax(G4double z )
{
G4ThreeVector ptmp(0,0,z) ; // temporary point with z Komponent only
G4ThreeVector upperlimit; // upper phi-boundary limit at z = ptmp.z()
upperlimit = GetBoundaryAtPZ(sAxis0 & sAxisMax, ptmp);
return std::atan2( upperlimit.y(), upperlimit.x() ) ;
}
inline
G4double G4TwistTubsHypeSide::GetSurfaceArea()
{
// approximation with tube surface
return ( fAxisMax[1] - fAxisMin[1] ) * fR0 * fDPhi ;
}
#endif