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26// Implementation of inline methods of G4PolyPhiFace
27// --------------------------------------------------------------------
30G4VCSGface* G4PolyPhiFace::Clone()
32 return new G4PolyPhiFace(*this);
37// Decide precisely whether a trajectory passes to the left, right, or exactly
38// passes through the z position of a vertex point in our face.
40// Result is only determined within an arbitrary (positive) factor.
43// = 0 exactly on top of
44// In 99.9999% of the cases, a trivial calculation is used. In difficult
45// cases, a precise, compliant calculation is relied on.
48G4double G4PolyPhiFace::ExactZOrder( G4double z,
49 G4double qx, G4double qy, G4double qz,
50 const G4ThreeVector& v,
52 const G4PolyPhiFaceVertex* vert ) const
54 G4double answer = vert->z - z;
55 if (std::fabs(answer) < kCarTolerance)
57 G4ThreeVector qa( qx - vert->x + radial.x(),
58 qy - vert->y + radial.y(), qz - vert->z ),
59 qb( qx - vert->x, qy - vert->y, qz - vert->z );
60 G4ThreeVector qacb = qa.cross(qb);
62 answer = normSign*qacb.dot(v)*(normal.y()*radial.x()-normal.x()*radial.y());