Gabriele Cosmo
74 lines
3.0 KiB
Plaintext
74 lines
3.0 KiB
Plaintext
//
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// ********************************************************************
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// * DISCLAIMER *
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// * *
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// * The following disclaimer summarizes all the specific disclaimers *
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// * of contributors to this software. The specific disclaimers,which *
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// * govern, are listed with their locations in: *
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// * http://cern.ch/geant4/license *
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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. *
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// * *
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// * This code implementation is the intellectual property of the *
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// * GEANT4 collaboration. *
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// * By copying, distributing or modifying the Program (or any work *
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// * based on the Program) you indicate your acceptance of this *
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// * statement, and all its terms. *
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// ********************************************************************
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//
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//
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// $Id: G4PolyPhiFace.icc,v 1.4 2002/10/28 11:47:50 gcosmo Exp $
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// GEANT4 tag $Name: geant4-05-02-patch-01 $
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//
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//
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// --------------------------------------------------------------------
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// GEANT 4 inline definitions file
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//
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// G4PolyPhiFace.icc
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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 (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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