Gabriele Cosmo
67 lines
3.0 KiB
Plaintext
67 lines
3.0 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 G4PolyPhiFace
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// --------------------------------------------------------------------
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inline
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G4VCSGface* G4PolyPhiFace::Clone()
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{
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return new G4PolyPhiFace(*this);
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}
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// ExactZOrder
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//
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// Decide precisely whether a trajectory passes to the left, right, or exactly
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// passes through the z position of a vertex point in our face.
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//
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// Result is only determined within an arbitrary (positive) factor.
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// > 0 to the right
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// < 0 to the left
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// = 0 exactly on top of
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// In 99.9999% of the cases, a trivial calculation is used. In difficult
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// cases, a precise, compliant calculation is relied on.
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//
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inline
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G4double G4PolyPhiFace::ExactZOrder( G4double z,
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G4double qx, G4double qy, G4double qz,
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const G4ThreeVector& v,
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G4double normSign,
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const G4PolyPhiFaceVertex* vert ) const
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{
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G4double answer = vert->z - z;
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if (std::fabs(answer) < kCarTolerance)
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{
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G4ThreeVector qa( qx - vert->x + radial.x(),
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qy - vert->y + radial.y(), qz - vert->z ),
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qb( qx - vert->x, qy - vert->y, qz - vert->z );
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G4ThreeVector qacb = qa.cross(qb);
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answer = normSign*qacb.dot(v)*(normal.y()*radial.x()-normal.x()*radial.y());
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}
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return answer;
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}
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