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, char cellConfig=0)
	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.

Static Public Member Functions
static bool	isIsoCell (char cellConfig)
	Returns true if this cell config is intersected by the isoline.

static char	calculateCellConfig (float isoValue, float values[4])
	Calculates the cell config.

static int	oppositeDirection (int fromDir)

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

bool	_isBorderRight

bool	_isBorderTop

bool	_isBorderBottom

Friends
class	CSOMarchingSquares
	To allow for an accessing of the CSOMarchingSquares class.

Detailed Description

Marching squares cell.

Definition at line 44 of file CSOMarchingSquaresCell.h.

Member Typedef Documentation

◆ vecPoint2D

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

Defines a 2D point vector.

Definition at line 59 of file CSOMarchingSquaresCell.h.

◆ vecPoint2DIter

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

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

Definition at line 60 of file CSOMarchingSquaresCell.h.

Member Enumeration Documentation

◆ Direction

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 50 of file CSOMarchingSquaresCell.h.

Constructor & Destructor Documentation

◆ CSOMarchingSquaresCell()

ml::CSOMarchingSquaresCell::CSOMarchingSquaresCell ( )

Constructor.

◆ ~CSOMarchingSquaresCell()

ml::CSOMarchingSquaresCell::~CSOMarchingSquaresCell ( )

Destructor.

Member Function Documentation

◆ addPoints()

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.

◆ calculateCellConfig()

static char ml::CSOMarchingSquaresCell::calculateCellConfig	(	float	isoValue,
		float	values[4] )

inlinestatic

Calculates the cell config.

Definition at line 99 of file CSOMarchingSquaresCell.h.

References mlrange_cast().

◆ getToDirection()

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.

◆ isAmbiguous()

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 178 of file CSOMarchingSquaresCell.h.

◆ isIsoCell() [1/2]

bool ml::CSOMarchingSquaresCell::isIsoCell ( ) const

inline

Returns true if this cell is intersected by the isoline.

Definition at line 80 of file CSOMarchingSquaresCell.h.

References isIsoCell().

Referenced by isIsoCell().

◆ isIsoCell() [2/2]

bool ml::CSOMarchingSquaresCell::isIsoCell ( char cellConfig )

inlinestatic

Returns true if this cell config is intersected by the isoline.

Definition at line 185 of file CSOMarchingSquaresCell.h.

References mlrange_cast().

◆ operator!=()

bool ml::CSOMarchingSquaresCell::operator!= ( CSOMarchingSquaresCell & rkCell )

inline

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

Definition at line 126 of file CSOMarchingSquaresCell.h.

References mlrange_cast().

◆ oppositeDirection()

static int ml::CSOMarchingSquaresCell::oppositeDirection ( int fromDir )

inlinestatic

Definition at line 108 of file CSOMarchingSquaresCell.h.

References mlrange_cast().

◆ reset()

void ml::CSOMarchingSquaresCell::reset ( )

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

◆ set()

void ml::CSOMarchingSquaresCell::set	(	int	topLeftVoxel[2],
		float	values[4],
		float	isoValue,
		char	cellConfig = 0 )

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 if it is not passed.

Friends And Related Symbol Documentation

◆ CSOMarchingSquares

friend class CSOMarchingSquares

friend

To allow for an accessing of the CSOMarchingSquares class.

Definition at line 62 of file CSOMarchingSquaresCell.h.

Member Data Documentation

◆ _cellConfig

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 157 of file CSOMarchingSquaresCell.h.

◆ _isBorderBottom

bool ml::CSOMarchingSquaresCell::_isBorderBottom

protected

Definition at line 173 of file CSOMarchingSquaresCell.h.

◆ _isBorderLeft

bool ml::CSOMarchingSquaresCell::_isBorderLeft

protected

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

Definition at line 170 of file CSOMarchingSquaresCell.h.

◆ _isBorderRight

bool ml::CSOMarchingSquaresCell::_isBorderRight

protected

Definition at line 171 of file CSOMarchingSquaresCell.h.

◆ _isBorderTop

bool ml::CSOMarchingSquaresCell::_isBorderTop

protected

Definition at line 172 of file CSOMarchingSquaresCell.h.

◆ _isoValue

float ml::CSOMarchingSquaresCell::_isoValue

protected

The isovalue to check the values against.

Definition at line 168 of file CSOMarchingSquaresCell.h.

◆ _topLeftVoxel

int ml::CSOMarchingSquaresCell::_topLeftVoxel[2]

protected

The position of the top left voxel in voxel coordinates.

Definition at line 159 of file CSOMarchingSquaresCell.h.

◆ _values

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 166 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

Static Public Member Functions

Protected Attributes

Friends

Detailed Description

Member Typedef Documentation

◆ vecPoint2D

◆ vecPoint2DIter

Member Enumeration Documentation

◆ Direction

Constructor & Destructor Documentation

◆ CSOMarchingSquaresCell()

◆ ~CSOMarchingSquaresCell()

Member Function Documentation

◆ addPoints()

◆ calculateCellConfig()

◆ getToDirection()

◆ isAmbiguous()

◆ isIsoCell() [1/2]

◆ isIsoCell() [2/2]

◆ operator!=()

◆ oppositeDirection()

◆ reset()

◆ set()

Friends And Related Symbol Documentation

◆ CSOMarchingSquares

Member Data Documentation

◆ _cellConfig

◆ _isBorderBottom

◆ _isBorderLeft

◆ _isBorderRight

◆ _isBorderTop

◆ _isoValue

◆ _topLeftVoxel

◆ _values