SbDiscreteLineProfile Class Reference

Profile line extractor More...

#include <ImageViz/SbDiscreteLineProfile.h>

Public Member Functions
	SbDiscreteLineProfile (SbVec2i32 p1, SbVec2i32 p2, SoImageDataAdapter *image)
	Constructor defining the profile line on the image.
	SbDiscreteLineProfile (SbVec3i32 p1, SbVec3i32 p2, SoImageDataAdapter *image)
	SbDiscreteLineProfile (SbVec4i32 p1, SbVec4i32 p2, SoImageDataAdapter *image)
	~SbDiscreteLineProfile ()
	Destructor.
size_t	getLength () const
	Returns the length of extracted data (i.e.
const double &	getValue (int index, int component=0) const
	Returns the value along the line at specified displacement relatively to first point.
const double *	getValues () const
	Returns the values buffer.
const SbVec4i32 &	getPosition (int index) const
	Returns the position along the line at specified displacement relatively to first point.
const SbVec4i32 &	getFirstPosition () const
	Returns the first point.
const SbVec4i32 &	getLastPosition () const
	Returns the last point.
const double &	operator[] (int i) const
	Accessor operator.

Detailed Description

Profile line extractor

Define a profile line extractor based on the Bresenham's Line algorithm.

SEE ALSO

Definition at line 44 of file SbDiscreteLineProfile.h.

Constructor & Destructor Documentation

SbDiscreteLineProfile() [1/3]

SbDiscreteLineProfile::SbDiscreteLineProfile	(	SbVec2i32	p1,
		SbVec2i32	p2,
		SoImageDataAdapter *	image
	)

Constructor defining the profile line on the image.

Parameters

p1	begin point of the profile. Can be a 2d, 3d and 3d+t point.
p2	end point of the profile. Can be a 2d, 3d and 3d+t point.
image	image to profile. Cannot be NULL. Throws an SbException if any p1 or p2 are out of image. Throws an SbException if image is NULL.

SbDiscreteLineProfile() [2/3]

SbDiscreteLineProfile::SbDiscreteLineProfile	(	SbVec3i32	p1,
		SbVec3i32	p2,
		SoImageDataAdapter *	image
	)

SbDiscreteLineProfile() [3/3]

SbDiscreteLineProfile::SbDiscreteLineProfile	(	SbVec4i32	p1,
		SbVec4i32	p2,
		SoImageDataAdapter *	image
	)

~SbDiscreteLineProfile()

SbDiscreteLineProfile::~SbDiscreteLineProfile

(

)

Destructor.

Member Function Documentation

getFirstPosition()

const SbVec4i32 & SbDiscreteLineProfile::getFirstPosition

(

)

const

Returns the first point.

getLastPosition()

const SbVec4i32 & SbDiscreteLineProfile::getLastPosition

(

)

const

Returns the last point.

getLength()

size_t SbDiscreteLineProfile::getLength

(

)

const

Returns the length of extracted data (i.e.

the number of extracted voxels).

getPosition()

const SbVec4i32 & SbDiscreteLineProfile::getPosition

(

int

index

)

const

Returns the position along the line at specified displacement relatively to first point.

Range of index is between 0 and n-1 with n, the number of voxels in the segment (see getLength), Throws an SbException if index is out of bounds.

getValue()

const double & SbDiscreteLineProfile::getValue	(	int	index,
		int	component = 0
	)		const

Returns the value along the line at specified displacement relatively to first point.

Parameters

index
component	choose the component of the voxel. Default is 0 which correspond to 1-component image. Range of index is between 0 and n-1 with n, the number of voxels in the segment (see getLength). Range of component is between 0 and c - 1 with c is the number of component of the image ( e.g c = 1 for grayscale, c = 3 for RGB, c = 4 for RGBA ). Throws an SbException if index is out of bounds.

getValues()

const double * SbDiscreteLineProfile::getValues

(

)

const

Returns the values buffer.

operator[]()

const double & SbDiscreteLineProfile::operator[]

(

int

i

)

const

Accessor operator.

So you can do:

val = profile[i];

Note:

• profile[i] refers to profile.getValue( i, 0 ).
• Range of index is between 0 and n-1 with n, the number of voxels in the segment (see getLength),
• For performance reasons this is an unsafe accessor (bounds are not tested).
• Applicable only for 1-component image or on the first component of image.

---

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

• ImageViz/SbDiscreteLineProfile.h