Import Geant4 0.0.0 source tree

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+// This code implementation is the intellectual property of
+// the RD44 GEANT4 collaboration.
+//
+// By copying, distributing or modifying the Program (or any work
+// based on the Program) you indicate your acceptance of this statement,
+// and all its terms.
+//
+// $Id: G4PhysicsFreeVector.hh,v 2.1 1998/07/12 02:58:55 urbi Exp $
+// GEANT4 tag $Name: geant4-00 $
+//
+// 
+//--------------------------------------------------------------------
+//      GEANT 4 class header file
+//
+//  G4PhysicsFreeVector.hh
+//
+//  Description:
+//    A physics vector which has values of energy-loss, cross-section, 
+//    and other physics values of a particle in matter in a given 
+//    range of the energy, momentum, etc. The scale of energy/momentum
+//    bins is in free, ie. it is NOT need to be linear or log. Only 
+//    restrication is that bin values alway have to increase from
+//    a lower bin to a higher bin. This is necessary for the binary
+//    search to work correctly.
+//
+//  History:
+//    02 Dec. 1995, G.Cosmo : Structure created based on object model
+//    06 Jun. 1996, K.Amako : Implemented the 1st version
+//    01 Jul. 1996, K.Amako : Cache mechanism and hidden bin from the 
+//                            user introduced.
+//    26 Sep. 1996, K.Amako : Constructor with only 'bin size' added.
+//
+//--------------------------------------------------------------------
+
+#ifndef G4PhysicsFreeVector_h
+#define G4PhysicsFreeVector_h 1
+
+#include "globals.hh"
+#include "G4DataVector.hh"
+#include "G4PhysicsVector.hh"
+
+
+class G4PhysicsFreeVector : public G4PhysicsVector  
+{
+  public:
+
+    // Constructors
+    G4PhysicsFreeVector();
+    G4PhysicsFreeVector(size_t theNbin);
+    G4PhysicsFreeVector(const G4DataVector& binVector, 
+                        const G4DataVector& dataVector);
+         // 'binVector' has the low edge value of each scale bin. 
+         // 'dataVector' has the cross-section/energy-loss/etc at 
+         // the energy/momenturm of the corresponding a bin of 
+         // 'binVector'. 'binVector' and 'dataVector' need to have 
+         // the same vector length.
+  
+    // Destructor
+    ~G4PhysicsFreeVector();
+
+    // Special PutValue function for PhyiscsFreeVector
+    void PutValue( size_t binNumber, G4double binValue, 
+                                     G4double dataValue );   
+         // To use this method to fill a PhyiscsFreeVector, you have
+         // to Construct a PhysicsFreeVector of the size you need
+         // using G4PhysicsFreeVector(size_t theNbin). Also take
+         // note that you have to fill all bin values and data 
+         // values before you the PhysicsFreeVector.
+
+  protected:
+
+    size_t FindBinLocation(G4double theEnergy) const;
+         // Find bin# in which theEnergy belongs - virtual function
+};
+
+
+inline size_t G4PhysicsFreeVector::FindBinLocation(G4double theEnergy) const {
+
+  // For G4PhysicsFreeVector, FindBinLocation is implemented using
+  // the binary search algorithm.
+  //
+  // Because this is a virtual function, it is accessed through a
+  // pointer to the G4PhyiscsVector object for most usages. In this
+  // case, 'inline' will not be invoked. However, there is a possibility 
+  // that the user access to the G4PhysicsFreeVector object directly and 
+  // not through pointers or references. In this case, the 'inline' will
+  // be invoked. (See R.B.Murray, "C++ Strategies and Tactics", Chap.6.6)
+
+  size_t lowerBound = 0;
+  size_t upperBound = numberOfBin-1;
+
+  do {
+    size_t midBin = (lowerBound + upperBound)/2;
+    if( theEnergy < binVector(midBin) )
+       upperBound = midBin-1;
+    else
+       lowerBound = midBin+1;
+  } while (lowerBound <= upperBound); 
+
+  return upperBound;
+}
+
+#endif
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