New version of the code, see history.txt for more details

[u/mrichter/AliRoot.git] / RALICE / Ali3Vector.h

diff --git a/RALICE/Ali3Vector.h b/RALICE/Ali3Vector.h
index 40eef45dd61bade71f026ab59579d1a06ed3fea3..6c8c593bd8ecdceae12ee5de791f653f683765c1 100644 (file)
--- a/RALICE/Ali3Vector.h
+++ b/RALICE/Ali3Vector.h
@@ -1,50 +1,9 @@
 #ifndef ALI3VECTOR_H
 #define ALI3VECTOR_H
-///////////////////////////////////////////////////////////////////////////
-// Class Ali3Vector
-// Handling of 3-vectors in various reference frames.
-//
-// This class is meant to serve as a base class for ALICE objects
-// that have 3-dimensional vector characteristics.
-//
-// Note :
-// ------
-// Vectors (v) and reference frames (f) are specified via
-// SetVector(Float_t* v,TString f) under the following conventions :
-//
-// f="car" ==> v in Cartesian coordinates   (x,y,z)
-// f="sph" ==> v in Spherical coordinates   (r,theta,phi)
-// f="cyl" ==> v in Cylindrical coordinates (rho,phi,z)
-//
-// All angles are in radians.
-//
-// Example :
-// ---------
-//
-// Ali3Vector a;
-// Float_t v[3]={-1,25,7};
-// a.SetVector(v,"car");
-// a.Info();
-//
-// Float_t vec[3];
-// a.GetVector(vec,"sph");
-//
-// Ali3Vector b;
-// Float_t v2[3]={6,-18,33};
-// b.SetVector(v2,"car");
-//
-// Float_t dotpro=a.Dot(b);
-//
-// Ali3Vector c=a.Cross(b);
-// c.Info("sph");
-// c.GetVector(vec,"cyl");
-// Float_t norm=c.GetNorm();
-// c=a+b;
-// c=a-b;
-// c=a*5;
-//
-//--- NvE 30-mar-1999 UU-SAP Utrecht
-///////////////////////////////////////////////////////////////////////////
+/* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
+ * See cxx source for full Copyright notice                               */
+
+/* $Id$ */
 
 #include <iostream.h>
 #include <math.h>
@@ -61,9 +20,15 @@ class Ali3Vector
   virtual void GetVector(Double_t* v,TString f); // Provide vector v in frame f
   virtual void SetVector(Float_t*  v,TString f); // Store vector v in frame f
   virtual void GetVector(Float_t*  v,TString f); // Provide vector v in frame f
+  virtual void SetErrors(Double_t* e,TString f); // Store errors of vector in frame f
+  virtual void GetErrors(Double_t* e,TString f); // Provide errors of vector in frame f
+  virtual void SetErrors(Float_t*  e,TString f); // Store errors of vector in frame f
+  virtual void GetErrors(Float_t*  e,TString f); // Provide errors of vector in frame f
   virtual void Info(TString f="car");            // Print vector components in frame f
   Double_t GetNorm();                            // Provide norm of the vector
   Double_t Dot(Ali3Vector& q);                   // Provide dot product with q
+  Double_t GetPseudoRapidity();                  // Provide the pseudorapidity w.r.t z-axis
+  Double_t GetResultError();                     // Provide error on scalar result (e.g. norm)
   Ali3Vector Cross(Ali3Vector& q);               // Provide cross product with q
   Ali3Vector operator+(Ali3Vector& q);           // Add vector q
   Ali3Vector operator-(Ali3Vector& q);           // Subtract vector q
@@ -75,8 +40,10 @@ class Ali3Vector
   Ali3Vector& operator/=(Double_t s);            // Divide by scalar s
 
  protected:
-  Double_t fV,fTheta,fPhi; // Vector in spherical coordinates
+  Double_t fV,fTheta,fPhi;    // Vector in spherical coordinates
+  Double_t fDx,fDy,fDz;       // Errors on Cartesian coordinates
+  Double_t fDresult;          // Error on scalar result (e.g. norm or dotproduct)
 
- ClassDef(Ali3Vector,1) // Class definition to enable ROOT I/O
+ ClassDef(Ali3Vector,1) // Handling of 3-vectors in various reference frames.
 };
 #endif