G4Sort.hh File Reference

#include "globals.hh"

Go to the source code of this file.

Functions
void	sort_double (G4double[], G4int, G4int)
void	swap_double (G4double[], G4int, G4int)

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Function Documentation

void sort_double	(	G4double	[],
		G4int	,
		G4int
	)

Definition at line 39 of file G4Sort.cc.

References sort_double(), and swap_double().

Referenced by G4CylindricalSurface::Intersect(), G4ConicalSurface::Intersect(), and sort_double().

{
  //  G4Sort elements in array from v[left] to v[right]  
  //  used recursively  
  //  algorithm comes from Kernighan and Ritchie, "The C Programming
  //  Language", second edition, p.87  
  
  G4int i, last;
  if ( left >= right )  // do nothing if array contains 
    return;             // fewer than two elements
  
  swap_double( v, left, ( left + right ) / 2 );   // move part. elt. 
  last = left;                                    // to v[0] 

  for ( i = left+1; i <= right; i++ )   // partition 
    if ( v[i] < v[left] )
      swap_double( v, ++last, i );
  
  swap_double( v, left, last ); // restore partition element
  
  sort_double( v, left, last-1 );
  sort_double( v, last+1, right );
  return;
}

void swap_double	(	G4double	[],
		G4int	,
		G4int
	)

Definition at line 65 of file G4Sort.cc.

Referenced by sort_double().

{
  /*  interchange elements i and j in an array  */
  G4double temp;
  temp = v[i];
  v[i] = v[j];
  v[j] = temp;
}

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