Marching squares cell. More...

#include <CSOMarchingSquaresCell.h>

Public Types
enum	Direction { NONE = 0, LEFT = 1, TOP = 2, RIGHT = 4, BOTTOM = 8 }
	Enumeration of directions (next to compute). More...
typedef std::vector< Vector2 >	vecPoint2D
	Defines a 2D point vector.
typedef vecPoint2D::iterator	vecPoint2DIter
	Defines an iterator to iterate through a 2D point vector.
Public Member Functions
	CSOMarchingSquaresCell ()
	Constructor.
	~CSOMarchingSquaresCell ()
	Destructor.
void	reset ()
	Resets the state of the cell (i.e. no values are set)
void	set (int topLeftVoxel[2], float values[4], float isoValue)
	Set the top left position in voxel coordinates `topLeftVoxel`, the `values` of the 4 corners and the `isoValue`.
bool	isAmbiguous () const
	There are two configurations (5 and 10) where the next cell one can visit is not unique.
bool	isIsoCell () const
	Returns true if this cell is intersected by the isoline.
int	getToDirection (int fromDir) const
	Returns the direction for this cell to go to coming from `fromDir`.
bool	addPoints (bool bIinterpolate, int fromDir, vecPoint2D &points, float xyOffset)
	Adds points the `points` vector according to the cell configuration.
bool	operator!= (CSOMarchingSquaresCell &rkCell)
	The inequality operator takes the cell configuration and the cell position into account.
Protected Attributes
unsigned char	_cellConfig
	The cell configuration is saved as a bit set such that Bit 0 is set if the upper left corner is above the isovalue.
int	_topLeftVoxel [2]
	The position of the top left voxel in voxel coordinates.
float	_values [4]
	The four voxel values used to determine the cell configuration and to interpolate the position.
float	_isoValue
	The isovalue to check the values against.
bool	_isBorder
	Flag to indicate that some voxels of this cell are outside the image.
Friends
class	CSOMarchingSquares
	To allow for an accessing of the CSOMarchingSquares class.

Detailed Description

Marching squares cell.

Definition at line 38 of file CSOMarchingSquaresCell.h.

Member Typedef Documentation

typedef std::vector<Vector2> ml::CSOMarchingSquaresCell::vecPoint2D

Defines a 2D point vector.

Definition at line 52 of file CSOMarchingSquaresCell.h.

typedef vecPoint2D::iterator ml::CSOMarchingSquaresCell::vecPoint2DIter

Defines an iterator to iterate through a 2D point vector.

Definition at line 53 of file CSOMarchingSquaresCell.h.

Member Enumeration Documentation

enum ml::CSOMarchingSquaresCell::Direction

Enumeration of directions (next to compute).

Enumerator:

NONE	No direction.
LEFT	To the left.
TOP	To the top.
RIGHT	To the right.
BOTTOM	To the bottom.

Definition at line 44 of file CSOMarchingSquaresCell.h.

Constructor & Destructor Documentation

ml::CSOMarchingSquaresCell::CSOMarchingSquaresCell ( )

Constructor.

ml::CSOMarchingSquaresCell::~CSOMarchingSquaresCell ( )

Destructor.

Member Function Documentation

bool ml::CSOMarchingSquaresCell::addPoints	(	bool	bIinterpolate,
		int	fromDir,
		vecPoint2D &	points,
		float	xyOffset
	)

Adds points the points vector according to the cell configuration.

If bInterpolate is true the method interpolates linearly. The parameter fromDir is necessary for the correct insertion order. xyOffset is added to the resulting positions. Use a 0 for evaluated functions and a 0.5 for evaluated images. The method returns whether a point was really added.

int ml::CSOMarchingSquaresCell::getToDirection ( int fromDir ) const

Returns the direction for this cell to go to coming from fromDir.

1 = left; 2 = up; 4 = right; 8 = down This is also encoded bitwise. For ambiguities this method currently returns the direction taking the way around that voxel whose value is greater than the isovalue.

Referenced by ml::CSOMarchingSquares::_getPossibleEnterDirection().

bool ml::CSOMarchingSquaresCell::isAmbiguous ( ) const [inline]

There are two configurations (5 and 10) where the next cell one can visit is not unique.

This method returns, if this cell is such an ambiguity.

Definition at line 118 of file CSOMarchingSquaresCell.h.

bool ml::CSOMarchingSquaresCell::isIsoCell ( ) const [inline]

Returns true if this cell is intersected by the isoline.

Definition at line 125 of file CSOMarchingSquaresCell.h.

bool ml::CSOMarchingSquaresCell::operator!= ( CSOMarchingSquaresCell & rkCell ) [inline]

The inequality operator takes the cell configuration and the cell position into account.

Definition at line 89 of file CSOMarchingSquaresCell.h.

References _cellConfig, and _topLeftVoxel.

void ml::CSOMarchingSquaresCell::reset ( )

Resets the state of the cell (i.e. no values are set)

void ml::CSOMarchingSquaresCell::set	(	int	topLeftVoxel[2],
		float	values[4],
		float	isoValue
	)

Set the top left position in voxel coordinates topLeftVoxel, the values of the 4 corners and the isoValue.

This method also computes and sets the internal cell configuration.

Friends And Related Function Documentation

friend class CSOMarchingSquares [friend]

To allow for an accessing of the CSOMarchingSquares class.

Definition at line 55 of file CSOMarchingSquaresCell.h.

Member Data Documentation

unsigned char ml::CSOMarchingSquaresCell::_cellConfig [protected]

The cell configuration is saved as a bit set such that Bit 0 is set if the upper left corner is above the isovalue.

Definition at line 99 of file CSOMarchingSquaresCell.h.

Referenced by operator!=().

bool ml::CSOMarchingSquaresCell::_isBorder [protected]

Flag to indicate that some voxels of this cell are outside the image.

If it is the case, no interpolation is done for this cell.

Definition at line 113 of file CSOMarchingSquaresCell.h.

float ml::CSOMarchingSquaresCell::_isoValue [protected]

The isovalue to check the values against.

Definition at line 110 of file CSOMarchingSquaresCell.h.

int ml::CSOMarchingSquaresCell::_topLeftVoxel[2] [protected]

The position of the top left voxel in voxel coordinates.

Definition at line 101 of file CSOMarchingSquaresCell.h.

Referenced by ml::CSOMarchingSquares::_getKey(), and operator!=().

float ml::CSOMarchingSquaresCell::_values[4] [protected]

The four voxel values used to determine the cell configuration and to interpolate the position.

The following mapping is used: 0 = top-left 1 = top-right 2 = bottom-right 3 = bottom-left

Definition at line 108 of file CSOMarchingSquaresCell.h.

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

MeVisLab/Standard/Sources/ML/MLCSO/CSOTools/CSOMarchingSquaresCell.h

Public Types

Public Member Functions

Protected Attributes