Gabriele Cosmo
116 lines
4.6 KiB
Plaintext
116 lines
4.6 KiB
Plaintext
//
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// ********************************************************************
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// * License and Disclaimer *
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// * *
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// * The Geant4 software is copyright of the Copyright Holders of *
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// * the Geant4 Collaboration. It is provided under the terms and *
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// * conditions of the Geant4 Software License, included in the file *
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// * LICENSE and available at http://cern.ch/geant4/license . These *
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// * include a list of copyright holders. *
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// * *
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// * Neither the authors of this software system, nor their employing *
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// * institutes,nor the agencies providing financial support for this *
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// * work make any representation or warranty, express or implied, *
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// * regarding this software system or assume any liability for its *
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// * use. Please see the license in the file LICENSE and URL above *
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// * for the full disclaimer and the limitation of liability. *
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// * *
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// * This code implementation is the result of the scientific and *
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// * technical work of the GEANT4 collaboration. *
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// * By using, copying, modifying or distributing the software (or *
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// * any work based on the software) you agree to acknowledge its *
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// * use in resulting scientific publications, and indicate your *
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// * acceptance of all terms of the Geant4 Software license. *
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// ********************************************************************
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//
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// Implementation of inline methods of G4TwistTrapAlphaSide.
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// --------------------------------------------------------------------
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inline
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G4double G4TwistTrapAlphaSide::GetValueA(G4double phi)
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{
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return ( fDx4plus2 + fDx4minus2 * ( 2 * phi ) / fPhiTwist ) ;
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}
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inline
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G4double G4TwistTrapAlphaSide::GetValueD(G4double phi)
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{
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return ( fDx3plus1 + fDx3minus1 * ( 2 * phi) / fPhiTwist ) ;
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}
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inline
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G4double G4TwistTrapAlphaSide::GetValueB(G4double phi)
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{
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return ( fDy2plus1 + fDy2minus1 * ( 2 * phi ) / fPhiTwist ) ;
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}
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inline
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G4double G4TwistTrapAlphaSide::Xcoef(G4double u, G4double phi)
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{
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return GetValueA(phi)/2. + (GetValueD(phi)-GetValueA(phi))/4.
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- u*( ( GetValueD(phi)-GetValueA(phi) )/( 2 * GetValueB(phi) ) - fTAlph );
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}
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inline G4ThreeVector
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G4TwistTrapAlphaSide::SurfacePoint(G4double phi, G4double u , G4bool isGlobal)
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{
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// function to calculate a point on the surface, given by parameters phi,u
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G4ThreeVector SurfPoint ( Xcoef(u,phi) * std::cos(phi)
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- u * std::sin(phi) + fdeltaX*phi/fPhiTwist,
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Xcoef(u,phi) * std::sin(phi)
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+ u * std::cos(phi) + fdeltaY*phi/fPhiTwist,
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2*fDz*phi/fPhiTwist );
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if (isGlobal) { return (fRot * SurfPoint + fTrans); }
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return SurfPoint;
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}
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inline
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G4double G4TwistTrapAlphaSide::GetBoundaryMin(G4double phi)
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{
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return -0.5*GetValueB(phi) ;
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}
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inline
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G4double G4TwistTrapAlphaSide::GetBoundaryMax(G4double phi)
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{
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return 0.5*GetValueB(phi) ;
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}
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inline
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G4double G4TwistTrapAlphaSide::GetSurfaceArea()
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{
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return (fDz*(std::sqrt(16*fDy1*fDy1
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+ (fa1md1 + 4*fDy1*fTAlph)*(fa1md1 + 4*fDy1*fTAlph))
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+ std::sqrt(16*fDy2*fDy2 + (fa2md2 + 4*fDy2*fTAlph)
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* (fa2md2 + 4*fDy2*fTAlph))))/2. ;
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}
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inline
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G4ThreeVector G4TwistTrapAlphaSide::NormAng( G4double phi, G4double u )
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{
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// function to calculate the norm at a given point on the surface
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// replace a1-d1
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G4ThreeVector nvec ( fDy1* fDz*(4*fDy1*std::cos(phi)
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+ (fa1md1 + 4*fDy1*fTAlph)*std::sin(phi)),
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-(fDy1* fDz*((fa1md1 + 4*fDy1*fTAlph)*std::cos(phi)
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- 4*fDy1*std::sin(phi))),
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(fDy1*(-8*(fDx3minus1 + fDx4minus2)*fDy1
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+ fa1md1*(fDx2 + fDx3plus1 + fDx4)*fPhiTwist
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+ 4*(fDx2 + fDx3plus1 + fDx4)*fDy1*fPhiTwist
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*fTAlph + 2*(fDx3minus1 + fDx4minus2)
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*(fa1md1 + 4*fDy1*fTAlph)*phi)
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+ fPhiTwist*(16*fDy1*fDy1
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+ (fa1md1 + 4*fDy1*fTAlph)
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*(fa1md1 + 4*fDy1*fTAlph))*u
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+ 4*fDy1*(fa1md1*fdeltaY - 4*fdeltaX*fDy1
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+ 4*fdeltaY*fDy1*fTAlph)* std::cos(phi)
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- 4*fDy1*(fa1md1*fdeltaX + 4*fDy1*(fdeltaY
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+ fdeltaX*fTAlph))*std::sin(phi))/ 8. ) ;
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return nvec.unit();
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}
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