---

CCTData Class Reference

#include <CTData.h>

List of all members.

Public Methods
	CCTData ()
virtual	~CCTData ()
void	showData ()
void	extractPlane ()
void	getData (CString fileName)
void	setViewDir ()
void	setViewPoints ()
void	drawViewPoints ()
void	RotateViewX (float angle)
void	RotateViewY (float angle)
Public Attributes
int	dimX
int	dimY
int	dimZ
int	dimU
int	dimV
fftw_complex *	data
fftw_complex *	show
GLubyte *	show1
fftwnd_plan	p2D
fftwnd_plan	p3D
float	hlp [256]
Vektor3f	viewPoint [4]
Vektor3f	viewDir
Header	header
Protected Methods
void	Initialize ()
void	Destroy ()
int	linear (float t, float *coeff)
void	FHT3D ()
void	FHT2D ()
void	FFT3D ()
void	FFT2D ()
void	shift3D ()
void	shift2D ()
float	sqr (float d)
void	vector_hartley_transform (float *v, unsigned long size, long stride)

---

Detailed Description

This class holds holds all the data and transforms it.

---

Constructor & Destructor Documentation

CCTData::CCTData (    )  [inline]

Constructor of CCTData calls protected funtion Initialize.

virtual CCTData::~CCTData (    )  [inline, virtual]

Destructor of CCTData calls protected function Destroy.

---

Member Function Documentation

void CCTData::Destroy (    )  [protected]

Function destroys the plan for FFT2D, which is needed for each rendering step as the viewing direction is changed and it deletes the dynamic data structures data, show and show1

void CCTData::drawViewPoints (    )

Draw the vectors of the coordinate cross.

void CCTData::extractPlane (    )

Function which determines the viewing direction, performs a rotation based on it, interpolates the points in the volume by making use of a cyclic convolution with a filter and sets the points to be rendered. Next it performs a 2D-shift, the FFT2D and the 2D-shift back. Preparation of array show1 concerning brightness and color.

void CCTData::FFT2D (    )  [protected]

Function that performs the 2D Fast Fourier Transform.

void CCTData::FFT3D (    )  [protected]

Function that performs the 3D Fast Fourier Transform.

void CCTData::FHT2D (    )  [protected]

Function that performs the 2D Fast Hartley Transform.

void CCTData::FHT3D (    )  [protected]

Function that performs the 3D Fast Hartley Transform.

void CCTData::getData (  CString    fileName )

Read 3D-data from input file.

void CCTData::Initialize (    )  [protected]

Initializes the viewing direction and the coordinate-cross.

int CCTData::linear (  float    t, float *    coeff )  [protected]

Function for linear filter. t is a parameter in the interval [0,1) and coeff is a pointer to the array that contains the coefficients of the filter. This function returns the number of elements that were calculated as filter coefficients, in this case 2.

void CCTData::RotateViewX (  float    angle )

Perform a rotation around the X axis. angle is the parameter in radians.

void CCTData::RotateViewY (  float    angle )

Perform a rotation around the Y axis. angle is the parameter in radians.

void CCTData::setViewDir (    )

set the viewing direction corresponding to the rotations performed by holding the right mouse button and moving the mouse.

void CCTData::setViewPoints (    )

Initialize the vectors used for drawing the coordinate cross.

void CCTData::shift2D (    )  [protected]

Function that performs a cyclic 2D shift of all elements in the 2D-array show.

void CCTData::shift3D (    )  [protected]

Function that performs a cyclic 3D shift of all elements in the 3D-array data.

void CCTData::showData (    )

Used to read out 2D-array show1 and draw the corresponding points on the screen

float CCTData::sqr (  float    d )  [protected]

Function that calculates the square of the input value d and returns the result.

void CCTData::vector_hartley_transform (  float *    v, unsigned long    size, long    stride )  [protected]

Function that calculates the FHT in one dimension. v is a pointer to the array containing the values to be transformed. size is the length of v and has to be a power of 2. stride denotes the length of one step. The data is taken at intervals of length stride.

---

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

• CTData.h
• CTData.cpp

---