GLWidget Class Reference

#include <GLWidget.hpp>

List of all members.

Public Slots
void	saveScreenshot ()
void	channelChanged (int index)
void	switchStreamlineState (bool state)
void	dtValueChanged (double dt)
void	dsepValueChanged (double)
void	dtestValueChanged (double)
void	interpolationMethodChanged (bool euler)
void	paintMethodChanged (bool glyph)
void	switchArrowState (bool state)
void	numArrowChanged (int glyph)
void	alphaArrowChanged (int alpha)
void	alphaStreamChanged (int alpha)
Signals
void	numChannelsChanged (int channels)
Public Member Functions
	GLWidget (QWidget *parent=0)
virtual	~GLWidget ()
void	loadData (const std::string &strFilename)
void	setTransferValues (float *_values)
void	setArrowColor (float r, float g, float b)
void	setStreamColor (float r, float g, float b)
Protected Member Functions
void	initializeGL ()
void	resizeGL (int width, int height)
void	paintGL ()
void	renderArrows ()
void	renderStreamlines ()
void	generateStreamline (vec3 seedingPoint)
vec3	calcEulerPos (vec3 pos)
vec3	calcRungeKuttaPos (vec3 pos)

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Detailed Description

Class which represents the OpenGL rendering window. In this Class all needed functions for handling the volume and slice rendering are implemented.

Author:

Christian Hirsch

Clemens Roegner

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Constructor & Destructor Documentation

GLWidget::GLWidget

(

QWidget *

parent = 0 )

Constructor. This constructor creates a new OpenGL render window.

Parameters:

parent

Parent QWidget element.

GLWidget::~GLWidget

(

)

[virtual]

Destructor. Releases all the needed (graphics) memory.

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Member Function Documentation

void GLWidget::alphaArrowChanged

(

int

alpha )

[slot]

Changes the alpha value of the arrows.

Parameters:

alpha

The new alpha value.

void GLWidget::alphaStreamChanged

(

int

alpha )

[slot]

Changes the alpha value of the arrows.

Parameters:

alpha

The new alpha value.

vec3 GLWidget::calcEulerPos

(

vec3

pos )

[protected]

Calculates the next position with the Euler interpolation Method.

Parameters:

pos	The current Position.

Returns:

The vector to the next position.

vec3 GLWidget::calcRungeKuttaPos

(

vec3

pos )

[protected]

Calculates the next position with the Runge-Kutta interpolation Method.

Parameters:

pos	The current Position.

Returns:

The vector to the next position.

void GLWidget::channelChanged

(

int

index )

[slot]

Function to change the displayed channel.

Parameters:

index

Index of the channel.

void GLWidget::dsepValueChanged

(

double

_dsep )

[slot]

Changes seperation value for the streamlines.

Parameters:

dt	New dsep value.

void GLWidget::dtestValueChanged

(

double

_dtest )

[slot]

Changes test value for the streamlines.

Parameters:

dt	New dtest value.

void GLWidget::dtValueChanged

(

double

dt )

[slot]

Changes dt value for the interpolation methods.

Parameters:

dt	New dt value.

void GLWidget::generateStreamline

(

vec3

seedingPoint )

[protected]

Generate streamline function. This function creates one streamline.

Parameters:

seedingPoint

The point of which a streamline should be created.

void GLWidget::initializeGL

(

)

[protected]

Initializes all data needed for rendering (including devil + glut).

void GLWidget::interpolationMethodChanged

(

bool

euler )

[slot]

Changes the interpolation method for the streamlines.

Parameters:

euler

If true, then the Euler method will be used, else the RK method is used.

void GLWidget::loadData

(

const std::string &

strFilename )

Loads new flow data.

Parameters:

strFilename

String to the path of the volume data.

void GLWidget::numArrowChanged

(

int

glyph )

[slot]

Changes the number of arrows which should be drawn.

Parameters:

numArrows

The number of arrows in one line and of lines. numArrows * numArrows of arrows will be darwn.

void GLWidget::numChannelsChanged

(

int

channels )

[signal]

Signal which is emitted when the number of channels has changed.

Parameters:

channels

The new number of channels.

void GLWidget::paintGL

(

)

[protected]

Render function. Renders either the slices or the full volume data.

void GLWidget::paintMethodChanged

(

bool

glyph )

[slot]

Changes the paint method (normal lines vs glyph mapping).

Parameters:

glyph

If true the glyph maps are drawn, else normal lines.

void GLWidget::renderArrows

(

)

[protected]

Arrow render function.

void GLWidget::renderStreamlines

(

)

[protected]

Streamline render funtcion. This function calculates new streamlines with the alogrithm to generate "Evenly-Spaced Streamlines of Arbitrary Density".

void GLWidget::resizeGL	(	int	width,
		int	height
	)		[protected]

Initializes the OpenGL render window when the window is resized.

Parameters:

width	The new width of the render window.
height	The new height of the render window.

void GLWidget::saveScreenshot

(

)

[slot]

This function saves a screenhot in the programs folder. The file name is created automatically.

void GLWidget::setArrowColor	(	float	r,
		float	g,
		float	b
	)

Changes the colors of the arrows.

Parameters:

r	The new red value.
g	The new green value.
b	The new blue value.

void GLWidget::setStreamColor	(	float	r,
		float	g,
		float	b
	)

Changes the colors of the streams.

Parameters:

r	The new red value.
g	The new green value.
b	The new blue value.

void GLWidget::setTransferValues

(

float *

_values )

Sets new values for the transferfunction.

Parameters:

*_values

Pointer to the first element of a 4096 element float array.

void GLWidget::switchArrowState

(

bool

state )

[slot]

Changes the arrow state to [not] draw the arrows.

Parameters:

state

True if arrows should be drawn.

void GLWidget::switchStreamlineState

(

bool

state )

[slot]

Changes the streamline state to [not] draw the streamlines.

Parameters:

state

True if streamlines should be drawn.

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

• C:/Users/chrivieh/Desktop/My Dropbox/Studium/5. Semester/Visualisierung/Lab2/src/GLWidget.hpp
• C:/Users/chrivieh/Desktop/My Dropbox/Studium/5. Semester/Visualisierung/Lab2/src/GLWidget (Christian Hirsch's conflicted copy 2011-01-24).cpp
• C:/Users/chrivieh/Desktop/My Dropbox/Studium/5. Semester/Visualisierung/Lab2/src/GLWidget.cpp