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: G4KnotVector.hh,v 2.4 1998/12/11 15:38:26 stesting Exp $
+// GEANT4 tag $Name: geant4-00 $
+//
+#ifndef __KNOTVECTOR_H
+#define __KNOTVECTOR_H
+#include <math.h>
+#include "STEPaggregate.h"
+#include "geomdefs.hh"
+
+
+class G4KnotVector
+{
+ public:
+ 
+  G4KnotVector();
+  G4KnotVector(const int Size, const int* MultiList, STEPaggregate& Aggr);
+  G4KnotVector(const int Size, STEPaggregate& Aggr);
+  G4KnotVector(const int sz);
+  G4KnotVector(const G4KnotVector& old_kv);
+  ~G4KnotVector();
+
+  // Gets number of knots
+  inline int GetSize()const {return k_size;};
+
+  // Retrieves knot from knot vector index knot_number
+  inline G4double GetKnot(const int knot_number){return knots[knot_number];}
+
+  // Sets knot vector index knot_number to value
+  inline void   PutKnot(const int knot_number, const G4double value)
+  {
+    knots[knot_number]=value;
+  }
+
+  // Adds the internal knots to the new knot vector
+  G4KnotVector* MultiplyKnotVector( const int num, const G4double value);  
+
+  // Creates the new vector by merging the old vector with the
+  // knots in the vector knots_to_add
+  G4double* MergeKnotVector( const G4double *knots_to_add, const int add_size);
+
+  // Finds out how many Times val occurs in the knot vector
+  int  CheckKnotVector(const G4double val);
+
+  // Copies either the first half or the second half of
+  // the new knot vector values to the knot vectors of the
+  // new surfaces created by splitting
+  void ExtractKnotVector( G4KnotVector* kv, const int upper, const int lower);
+
+  // Searches the knot vector for the value and returns the index
+  // This is used in the Evaluation of the intersection to find
+  // out between which knots the intersection point is on the b-spline
+  // surface
+  int  GetKnotIndex(G4double k_value, const int order);
+
+
+ private:
+
+  // Number of knots
+  int k_size;
+
+  // Knot vector
+  G4double *knots;
+
+  inline G4double ApxEq(const G4double x,const G4double y) 
+  {
+    return (fabs(x - y) < kCarTolerance);
+  }
+
+};
+
+#endif
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