LinearGrid Class Reference

Linear Grid inherets from Grid. More...

Inheritance diagram for LinearGrid:

Collaboration diagram for LinearGrid:

Public Member Functions
GridType	Type () override
	Returns the type of the grid (in this case LINEAR) More...
int	ReverseMap (double r) override
	Returns the index of the nearest point below r. More...
void	Init (double start, double end, int numpoints)
	Initializes the linear grid. More...
void	Write (IOSectionClass &outSection) override
void	Read (IOSectionClass &inSection) override
	LinearGrid ()
	Useless constructor. More...
LinearGrid &	operator= (const LinearGrid &lin)
	LinearGrid (double start, double end, int numpoints)
	Constructor that sets the number of points, start and end point of the original grid. More...
Public Member Functions inherited from Grid
double	operator() (int i) const
	The i'th point in the grid. More...
double *	data ()
Array< double, 1 > &	Points ()
virtual	~Grid ()

Private Member Functions
void	CheckRoundingMode ()

Private Attributes
double	delta
	The value between successive grid points. More...
double	deltainv

Additional Inherited Members
Public Attributes inherited from Grid
double	Start
	First and last grid points. More...
double	End
int	NumPoints
	Number of points in the grid. More...
Protected Attributes inherited from Grid
Array< double, 1 >	grid
	Contains the grid points. More...

Detailed Description

Linear Grid inherets from Grid.

Definition at line 73 of file Grid.h.

Constructor & Destructor Documentation

LinearGrid() [1/2]

LinearGrid ( )

inline

Useless constructor.

Definition at line 119 of file Grid.h.

  { /*  Do nothing */
  }

LinearGrid() [2/2]

LinearGrid ( double  start, double  end, int  numpoints  )

inline

Constructor that sets the number of points, start and end point of the original grid.

Definition at line 136 of file Grid.h.

References Init().

{ Init(start, end, numpoints); }

Member Function Documentation

CheckRoundingMode()

void CheckRoundingMode ( )

inlineprivate

Definition at line 661 of file Grid.h.

Referenced by Init().

{
  for (int i = 0; i < 100; i++)
  {
    double x = 100.0 * drand48() - 50.0;
    if (nearbyint(x) != round(x))
    {
      std::cerr << "Error in rounding mode detected in LinearGrid.  Abort.\n";
      abort();
    }
  }
}

Init()

void Init ( double  start, double  end, int  numpoints  )

inline

Initializes the linear grid.

Definition at line 88 of file Grid.h.

References CheckRoundingMode(), delta, deltainv, Grid::End, Grid::grid, Grid::NumPoints, Array< T, D, ALLOC >::resize(), and Grid::Start.

Referenced by LinearGrid(), and Read().

  {
    Start     = start;
    End       = end;
    NumPoints = numpoints;
    grid.resize(NumPoints);
    delta    = (End - Start) / (double)(NumPoints - 1);
    deltainv = 1.0 / delta;
    for (int i = 0; i < NumPoints; i++)
      grid(i) = Start + (double)i * delta;
    CheckRoundingMode();
  }

operator=()

LinearGrid& operator= ( const LinearGrid &  lin )

inline

Definition at line 123 of file Grid.h.

References delta, deltainv, Grid::End, Grid::grid, Array< T, D, ALLOC >::resize(), Array< T, D, ALLOC >::shape(), and Grid::Start.

  {
    grid.resize(lin.grid.shape());
    Start    = lin.Start;
    End      = lin.End;
    grid     = lin.grid;
    delta    = lin.delta;
    deltainv = lin.deltainv;
    return *this;
  }

Read()

void Read ( IOSectionClass &  inSection )

inlineoverridevirtual

Implements Grid.

Definition at line 110 of file Grid.h.

References Grid::End, Init(), Grid::NumPoints, IOSectionClass::ReadVar(), and Grid::Start.

  {
    assert(inSection.ReadVar("Start", Start));
    assert(inSection.ReadVar("End", End));
    assert(inSection.ReadVar("NumPoints", NumPoints));
    Init(Start, End, NumPoints);
  }

ReverseMap()

int ReverseMap ( double  r )

inlineoverridevirtual

Returns the index of the nearest point below r.

Implements Grid.

Definition at line 85 of file Grid.h.

References deltainv, and Grid::Start.

{ return ((int)nearbyint((r - Start) * deltainv - 0.5)); }

Type()

GridType Type ( )

inlineoverridevirtual

Returns the type of the grid (in this case LINEAR)

Implements Grid.

Definition at line 82 of file Grid.h.

References LINEAR.

{ return (LINEAR); }

Write()

void Write ( IOSectionClass &  outSection )

inlineoverridevirtual

Implements Grid.

Definition at line 101 of file Grid.h.

References Grid::End, Grid::grid, Grid::NumPoints, Grid::Start, and IOSectionClass::WriteVar().

  {
    outSection.WriteVar("Points", grid);
    outSection.WriteVar("Type", std::string("Linear"));
    outSection.WriteVar("Start", Start);
    outSection.WriteVar("End", End);
    outSection.WriteVar("NumPoints", NumPoints);
  }

Member Data Documentation

delta

double delta

private

The value between successive grid points.

Definition at line 77 of file Grid.h.

Referenced by Init(), and operator=().

deltainv

double deltainv

private

Definition at line 77 of file Grid.h.

Referenced by Init(), operator=(), and ReverseMap().

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The documentation for this class was generated from the following file:

• /home/pk7/projects/qmc/for_cron_doxygen/qmcpack/src/QMCTools/ppconvert/src/common/Grid.h