TransferFunction Class Reference

#include <TransferFunction.h>

List of all members.

Public Member Functions
	TransferFunction (const float _x, const float _y, const float _width, const float _height, const int _numberOfBars, const float _pointSize, ColorChooser *_colorChooser, Shader *_shader, int _textureID, bool _extraTF, FlowData *_dataset, int _channelNr)
	~TransferFunction ()
void	setPointList (TransferPointList *_pointList)
TransferPointList *	getPointList ()
void	render ()
bool	isTransferFunctionClicked (const float xWorld, const float yWorld)
void	handleClick (const int button, const int state, const float xWorld, const float yWorld)
void	updateTransferFunctionTextureData ()
void	uploadTexture ()
	TransferFunction (const float _x, const float _y, const float _width, const float _height, const int _numberOfBars, const float _pointSize, ColorChooser *_colorChooser, Shader *_shader, int _textureID, bool _extraTF, FlowData *_dataset, int _channelNr)
	~TransferFunction ()
void	setPointList (TransferPointList *_pointList)
TransferPointList *	getPointList ()
void	render ()
bool	isTransferFunctionClicked (const float xWorld, const float yWorld)
void	handleClick (const int button, const int state, const float xWorld, const float yWorld)
void	updateTransferFunctionTextureData ()
void	uploadTexture ()
Protected Member Functions
void	initHistogramm ()
void	drawHistogramm ()
void	drawTransferPointPolynom ()
void	drawTransferPoint (TransferPoint *prePoint, TransferPoint *point)
void	drawDensityDistribution ()
void	initHistogramm ()
void	drawHistogramm ()
void	drawTransferPointPolynom ()
void	drawTransferPoint (TransferPoint *prePoint, TransferPoint *point)
void	drawDensityDistribution ()
Private Attributes
float	x
float	y
float	width
float	height
float	pointSize
int	numberOfBars
int *	histogramm
float *	logHistHeights
int	maxOfHistogramm
TransferPointList *	pointList
ColorChooser *	colorChooser
bool	pointDragged
Shader *	shader
unsigned char *	transferTextureData
GLuint	transferTexture
int	textureID
bool	extraTF
FlowData *	dataset
int	channelNr

---

Detailed Description

The transfer function class

---

Constructor & Destructor Documentation

TransferFunction::TransferFunction	(	const float	_x,
		const float	_y,
		const float	_width,
		const float	_height,
		const int	_numberOfBars,
		const float	_pointSize,
		ColorChooser *	_colorChooser,
		Shader *	_shader,
		int	_textureID,
		bool	_extraTF,
		FlowData *	_dataset,
		int	_channelNr
	)

Constructs a new TransferFunction object

Parameters:

	_x	X-Coordinate of the left down corner of the Transfer Function
	_y	Y-Coordinate of the left down corner of the Transfer Function
	_width	Width of the Transfer Function
	_height	Height of the Transfer Function
	_numberOfBars	Number of bars that are drawn to visualize the density distribution
	_volume	Pointer to the volume
	_colorChooser	Pointer to the color chooser
	_shader	Pointer to the Shader-Object

TransferFunction::~TransferFunction

(

)

Destroys the object

TransferFunction::TransferFunction	(	const float	_x,
		const float	_y,
		const float	_width,
		const float	_height,
		const int	_numberOfBars,
		const float	_pointSize,
		ColorChooser *	_colorChooser,
		Shader *	_shader,
		int	_textureID,
		bool	_extraTF,
		FlowData *	_dataset,
		int	_channelNr
	)

TransferFunction::~TransferFunction

(

)

---

Member Function Documentation

void TransferFunction::drawDensityDistribution

(

)

[protected]

void TransferFunction::drawDensityDistribution

(

)

[protected]

Draws the density distribution

void TransferFunction::drawHistogramm

(

)

[protected]

void TransferFunction::drawHistogramm

(

)

[protected]

Draws the histogram

void TransferFunction::drawTransferPoint	(	TransferPoint *	prePoint,
		TransferPoint *	point
	)			[protected]

void TransferFunction::drawTransferPoint	(	TransferPoint *	prePoint,
		TransferPoint *	point
	)			[protected]

Draws a transferPoint and the background between the current and the last point if the current point is not the head of the list

Parameters:

	prePoint	the predecessor of the current point
	point	the current point in the transfer point list

void TransferFunction::drawTransferPointPolynom

(

)

[protected]

void TransferFunction::drawTransferPointPolynom

(

)

[protected]

Draws the Transfer Point Polynom, which is the tranfer point list connected by lines and shaded with the colors of the points

TransferPointList* TransferFunction::getPointList

(

)

TransferPointList * TransferFunction::getPointList

(

)

Returns a pointer to the transfer-point-list

Returns:

Pointer to the transfer-point-list

void TransferFunction::handleClick	(	const int	button,
		const int	state,
		const float	xWorld,
		const float	yWorld
	)

void TransferFunction::handleClick	(	const int	button,
		const int	state,
		const float	xWorld,
		const float	yWorld
	)

Handles a click into the transfer function

Parameters:

	button	value indicating which button was pressed on the mouse
	state	value indicating whether the button was pressed or released
	xWorld	x-Coordinate of the click relative to the left down corner of the viewport
	yWorld	y-Coordinate of the click relative to the left down corner of the viewport

void TransferFunction::initHistogramm

(

)

[protected]

void TransferFunction::initHistogramm

(

)

[protected]

Initializes the histogram

bool TransferFunction::isTransferFunctionClicked	(	const float	xWorld,
		const float	yWorld
	)

bool TransferFunction::isTransferFunctionClicked	(	const float	xWorld,
		const float	yWorld
	)

Returns a boolean value indicating whether the current click was into the transfer function or not

Parameters:

	_xWorld	x-Coordinate of the click relative to the left down corner of the viewport
	_yWorld	y-Coordinate of the click relative to the left down corner of the viewport

Returns:

boolean value indicating whether the current click was into the transfer function or not

void TransferFunction::render

(

)

void TransferFunction::render

(

)

Renders the Transfer Function

void TransferFunction::setPointList

(

TransferPointList *

_pointList

)

void TransferFunction::setPointList

(

TransferPointList *

_pointList

)

Sets the pointer to the transfer-point-list

Parameters:

_pointList

the pointer to the transfer-point-list

void TransferFunction::updateTransferFunctionTextureData

(

)

void TransferFunction::updateTransferFunctionTextureData

(

)

Updates the 1D transfer function texture according to the current values in the transfer function

void TransferFunction::uploadTexture

(

)

void TransferFunction::uploadTexture

(

)

Uploads the transfer function texture to the shader

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Member Data Documentation

int TransferFunction::channelNr [private]

ColorChooser * TransferFunction::colorChooser [private]

Pointer to the color chooser

FlowData * TransferFunction::dataset [private]

bool TransferFunction::extraTF [private]

Determines if the transferfunction should be uploaded as a own transfer function

float TransferFunction::height [private]

Height of the Transfer Function

int * TransferFunction::histogramm [private]

Pointer to the array containing the histogram values

float * TransferFunction::logHistHeights [private]

Pointer to the array containing the logarithmized heights of the histogram bars

int TransferFunction::maxOfHistogramm [private]

The maximum of the histogram

int TransferFunction::numberOfBars [private]

Number of bars that are drawn to visualize the density distribution

bool TransferFunction::pointDragged [private]

Boolean value indicating whether a transfer point is dragged at the moment or not

TransferPointList * TransferFunction::pointList [private]

Pointer to the transfer-point-list

float TransferFunction::pointSize [private]

Size of the points

Shader * TransferFunction::shader [private]

Pointer to the Shader-Object

int TransferFunction::textureID [private]

ID of the underlying texture

GLuint TransferFunction::transferTexture [private]

The 1D Transfer Function Texture

unsigned char * TransferFunction::transferTextureData [private]

Pointer to an array containing the 1D Transfer Function Texture

float TransferFunction::width [private]

Width of the Transfer Function

float TransferFunction::x [private]

X-Coordinate of the left down corner of the Transfer Function

float TransferFunction::y [private]

Y-Coordinate of the left down corner of the Transfer Function

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

• E:/Eigene Dateien/Michi/Studium/Semester7/Vis/LU/Beispiel2/FlowVis/FlowVis_2009_01_19_inkl_Texture/header/TransferFunction.h
• E:/Eigene Dateien/Michi/Studium/Semester7/Vis/LU/Beispiel2/FlowVis/header/TransferFunction.h
• E:/Eigene Dateien/Michi/Studium/Semester7/Vis/LU/Beispiel2/FlowVis/FlowVis_2009_01_19_inkl_Texture/src/TransferFunction.cpp
• E:/Eigene Dateien/Michi/Studium/Semester7/Vis/LU/Beispiel2/FlowVis/src/TransferFunction.cpp