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// |
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// Class Helix |
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// |
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// Implementation nof a general helix class with a set of tools for working with objects like |
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// Implementation of a general helix class with a set of tools for working with objects like |
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// tracks and finding intersections (vertices). |
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// |
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// Author: C.Paus (stolen and adjusted from CDF implementation of Kurt Rinnert, |
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virtual TVector3 Direction(double s = 0.0) const; |
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// the second derivative of the helix vs (three-dimensional) path length |
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virtual TVector3 SecondDerivative(double s = 0.0) const; |
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// Get both position and direction at once. |
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//virtual void Location(Trajectory::Location &loc, double s = 0.0) const; |
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// Get pathlength at fixed rho=sqrt(x^2 + y^2) |
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virtual double PathLengthAtRhoEquals(double rho) const; |
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// Needed whenever fSs or fCc are used. |
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inline void fCacheSinesAndCosines(double s) const; |
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ClassDef(Helix, 0) // General helix class |
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}; |
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} |
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