include/Geant4/G4TwistTrapParallelSide.icc

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0024 // ********************************************************************
0025 //
0026 // Implementation of inline methods of G4TwistTrapParallelSide.
0027 // --------------------------------------------------------------------
0028
0029 inline
0030 G4double G4TwistTrapParallelSide::GetValueB(G4double phi)
0031 {
0032   return ( fDy2plus1 + fDy2minus1 * ( 2 * phi ) / fPhiTwist ) ;
0033 }
0034
0035 inline
0036 G4double G4TwistTrapParallelSide::Xcoef(G4double phi)
0037 {
0038   return GetValueB(phi)/2. ;
0039 }
0040
0041 inline G4ThreeVector
0042 G4TwistTrapParallelSide::
0043 SurfacePoint( G4double phi, G4double u, G4bool isGlobal )
0044 {
0045   // function to calculate a point on the surface, given by parameters phi,u
0046
0047   G4ThreeVector SurfPoint ( u*std::cos(phi) - Xcoef(phi)*std::sin(phi)
0048                           + fdeltaX*phi/fPhiTwist,
0049                             u*std::sin(phi) + Xcoef(phi)*std::cos(phi)
0050                           + fdeltaY*phi/fPhiTwist,
0051                             2*fDz*phi/fPhiTwist  );
0052   if (isGlobal) { return (fRot * SurfPoint + fTrans); }
0053   return SurfPoint;
0054 }
0055
0056
0057 inline
0058 G4double G4TwistTrapParallelSide::GetBoundaryMin(G4double phi)
0059 {
0060   return  -(fPhiTwist*(fDx2 + fDx4 - fDy2plus1*fTAlph)
0061           + 2*fDx4minus2*phi - 2*fDy2minus1*fTAlph*phi)/(2.*fPhiTwist) ;
0062 }
0063
0064 inline
0065 G4double G4TwistTrapParallelSide::GetBoundaryMax(G4double phi)
0066 {
0067   return (fDx2 + fDx4 + fDy2plus1*fTAlph)/ 2.
0068        + ((fDx4minus2 + fDy2minus1*fTAlph)*phi)/fPhiTwist ;
0069 }
0070
0071 inline
0072 G4double  G4TwistTrapParallelSide::GetSurfaceArea()
0073 {
0074   return 2*fDx4plus2*fDz ;
0075 }
0076
0077 inline
0078 G4ThreeVector G4TwistTrapParallelSide::NormAng( G4double phi, G4double u )
0079 {
0080   // function to calculate the norm at a given point on the surface
0081   // replace a1-d1
0082
0083   G4ThreeVector nvec(-2*fDz*std::sin(phi) ,
0084                       2*fDz*std::cos(phi) ,
0085                      -(fDy2minus1 + fPhiTwist*u + fdeltaY*std::cos(phi)
0086                      -fdeltaX*std::sin(phi))) ;
0087   return nvec.unit();
0088 }