Rederer. More...

#include <RenderWidget.h>

Public Slots
void	loadDataFile ()
	Slot to invoke data file loading.
void	layerChannelChanged (int channel, int layer)
	Slot to update channel number a layer.
void	layerTypeChanged (int type, int layer)
	Slot to update type of a layer.
void	layerTransferImageChanged (const QImage &image, int layer)
	Slot to update transfer function of a layer.
void	layerAdd (int layer)
	Slot to add a layer.
void	layerMove (int layer, int newPos)
	Slot to move a layer.
void	layerRemove (int layer)
	Slot to remove a layer.
void	settingsSliderChanged (int value, int slider)
	Slot to update parameters.
void	settingsSLModeChanged (int value)
	Slot to update the streamline mode.
void	settingsSLCompute ()
	Slot to invoke streamline computation.
void	settingsSLInverpolationChanged (int value)
	Slot to update the streamline interpolation mode.
void	settingsEmitSliderValue (int slider)
	Slot to invoke update of the gui slider values.
Signals
void	dataLoaded (int channels)
	Signals that new data has been loaded.
void	emitSettingValues (int value, int slider)
	Signals required update of the GUI slider.
Public Member Functions
	RenderWidget (QWidget *parent=NULL)
int	heightForWidth (int w) const
	Returns aspect ratio.
Protected Member Functions
void	initializeGL ()
	Initializes OpenGL.
void	resizeGL (int w, int h)
	Resize widget.
void	paintGL ()
	Render function.
Private Member Functions
void	initArrows (int n, float aspect)
	Generates Display List for the arrows.
void	generateNormalStreamlineList ()
	Generates the streamline display list.
void	generateTaperingStreamlineList ()
	Generates the streamline display list for tapering.
void	generateGlyphStreamlineList ()
	Generates the streamline display list for glyph mapping.
void	generateTextureStreamlineList ()
	Generates the streamline display list for texture generation.
float	getSLIntensityForRank (int rank, int function_type)
	Calculates the intensity value for the given rank.
void	initGlew ()
	Initializes GLEW.
void	loadData (std::string filename)
	Loads Dataset.
void	loadChannels (FlowData *dataset)
	Loads all channels of a dataset.
void	computeStreamlines ()
	Computes evenly spaced streamlines.
Streamline *	calculateStreamline (vec3 seed, int gridWidth, int gridHeight, vector< vec3 > *grid)
	Calculates a streamline starting from seed point seed.
void	gridAddAt (vector< vec3 > *grid, int gridwidth, int gridheight, vec3 pos)
	Adds the point pos at its position in the grid.
bool	gridAroundOkay (vector< vec3 > grid, int gridwidth, int gridheight, vec3 pos, queue< vec3 > lastones)
	Checks whether it is ok to add the point pos at its position in the grid.
float	minGridDistance (vector< vec3 > grid, int gridwidth, int gridheight, vec3 pos, queue< vec3 > lastones)
	Returns the distance to the closest point to pos.
bool	distanceOkay (vec3 from, vec3 to)
	Checks whether the distance between the two points is greater than d_test.
vec3	getNextEulerPoint (vec3 sample_point, bool backward)
	Returns the next position using Euler integration.
vec3	getNextRungeKutta2Point (vec3 sample_point, bool backward)
	Returns the next position using RungeKutta2 integration.
vec3	getNextRungeKutta4Point (vec3 sample_point, bool backward)
	Returns the next position using RungeKutta4 integration.
void	printGLError ()
	Prints OpenGL Errors.
Private Attributes
const double	PI
float *	xdata
float *	ydata
LayerRenderable *	testLayer
LayerRenderable *	testarrowLayer
GLuint	testTransferTexture
int	textureSize
int	textureWidth
int	textureHeight
int	arrowCount
QVector< LayerRenderable * >	layers
QVector< Shader * >	shaders
GLuint *	textures
int	channelCount
GLuint *	disp_lists
Shader *	simple
Shader *	arrows
Shader *	slines
Shader *	sltexture
float	arrowSize
float	d_sep_val
float	d_sep
float	d_test_val
float	d_test
float	dt
int	sl_num_samples
vector< Streamline * >	streamlines
int	integration_mode
int	streamline_mode
Static Private Attributes
static const int	EULER = 0
static const int	RK2 = 1
static const int	RK4 = 2
static const int	NORMAL = 0
static const int	TAPERING = 1
static const int	GLYPH = 2
static const int	TEXTURE = 3

Detailed Description

Rederer.

This Widget handles the import, processing and rendering of the data. That means: Everything except GUI.

Date:: 15.01.2011

Definition at line 27 of file RenderWidget.h.

Member Function Documentation

Streamline * RenderWidget::calculateStreamline	(	vec3 *	seed,
		int	gridWidth,
		int	gridHeight,
		vector< vec3 > **	grid
	)		`[private]`

Calculates a streamline starting from seed point seed.

Date:: 15.01.2011

Parameters:

seed	the seed point
gridWidth	the grid width
gridHeight	the grid height
grid	the grid for evenly spaced streamlines

Returns:: a pointer to the new streamline.

Definition at line 301 of file RenderWidget.cpp.

void RenderWidget::computeStreamlines ( ) [private]

Computes evenly spaced streamlines.

Date:: 15.01.2011

Definition at line 195 of file RenderWidget.cpp.

void RenderWidget::dataLoaded ( int channels ) [signal]

Signals that new data has been loaded.

This functions signals that new data has been loaded.

Date:: 15.01.2011

Parameters:

channels number of channels in the loaded dataset

bool RenderWidget::distanceOkay	(	vec3	from,
		vec3	to
	)		`[private]`

Checks whether the distance between the two points is greater than d_test.

Date:: 15.01.2011

Parameters:

from	first point
to	second point

Returns:: true if the distance is above d_test, false otherwise.

Definition at line 500 of file RenderWidget.cpp.

void RenderWidget::emitSettingValues	(	int	value,
		int	slider
	)		`[signal]`

Signals required update of the GUI slider.

This functions signals that parameters have changed and need to be updated in the gui.

Date:: 15.01.2011

Parameters:

value	new value - [0,100]
slider	slider corresponding to the changed parameter

void RenderWidget::generateGlyphStreamlineList ( ) [private]

Generates the streamline display list for glyph mapping.

Date:: 15.01.2011

Definition at line 847 of file RenderWidget.cpp.

void RenderWidget::generateNormalStreamlineList ( ) [private]

Generates the streamline display list.

Date:: 15.01.2011

Definition at line 729 of file RenderWidget.cpp.

void RenderWidget::generateTaperingStreamlineList ( ) [private]

Generates the streamline display list for tapering.

Date:: 15.01.2011

Definition at line 776 of file RenderWidget.cpp.

void RenderWidget::generateTextureStreamlineList ( ) [private]

Generates the streamline display list for texture generation.

Date:: 15.01.2011

Definition at line 895 of file RenderWidget.cpp.

vec3 RenderWidget::getNextEulerPoint	(	vec3	sample_point,
		bool	backward
	)		`[private]`

Returns the next position using Euler integration.

Date:: 15.01.2011

Parameters:

sample_point	the starting point for the integration
backward	a flag for going forward or backward

Returns:: the next position using Euler integration.

Definition at line 505 of file RenderWidget.cpp.

vec3 RenderWidget::getNextRungeKutta2Point	(	vec3	sample_point,
		bool	backward
	)		`[private]`

Returns the next position using RungeKutta2 integration.

Date:: 15.01.2011

Parameters:

sample_point	the starting point for the integration
backward	a flag for going forward or backward

Returns:: the next position using RungeKutta2 integration.

Definition at line 519 of file RenderWidget.cpp.

vec3 RenderWidget::getNextRungeKutta4Point	(	vec3	sample_point,
		bool	backward
	)		`[private]`

Returns the next position using RungeKutta4 integration.

Date:: 15.01.2011

Parameters:

sample_point	the starting point for the integration
backward	a flag for going forward or backward

Returns:: the next position using RungeKutta4 integration.

Definition at line 543 of file RenderWidget.cpp.

float RenderWidget::getSLIntensityForRank	(	int	rank,
		int	function_type
	)		`[private]`

Calculates the intensity value for the given rank.

Date:: 15.01.2011

Parameters:

rank	the rank for which the texture function should be evaluated
function_type	defines which function is used for texture generation. [0, 1]

Returns:: the value for the given rank and the given function.

Definition at line 953 of file RenderWidget.cpp.

void RenderWidget::gridAddAt	(	vector< vec3 > *	grid,
		int	gridwidth,
		int	gridheight,
		vec3	pos
	)		`[private]`

Adds the point pos at its position in the grid.

Date:: 15.01.2011

Parameters:

grid	the grid for evenly spaced streamlines
gridwidth	the grid width
gridheight	the grid height
pos	the point to be added

Definition at line 417 of file RenderWidget.cpp.

bool RenderWidget::gridAroundOkay	(	vector< vec3 > *	grid,
		int	gridwidth,
		int	gridheight,
		vec3	pos,
		queue< vec3 > *	lastones
	)		`[private]`

Checks whether it is ok to add the point pos at its position in the grid.

Date:: 15.01.2011

Parameters:

grid	the grid for evenly spaced streamlines
gridwidth	the grid width
gridheight	the grid height
pos	the position for which the grid should be checked
lastones	the list of last few points of this streamline

Returns:: true if it is ok to add the point here, false otherwise.

Definition at line 426 of file RenderWidget.cpp.

void RenderWidget::heightForWidth ( int w ) const

Returns aspect ratio.

This functions is used to maintain the aspect ration of the widget. This is not working.

Date:: 15.01.2011

Parameters:

w width

Returns:: height for width ratio

Definition at line 1002 of file RenderWidget.cpp.

void RenderWidget::initArrows	(	int	n,
		float	aspect
	)		`[private]`

Generates Display List for the arrows.

This functions generates a new display list for the rendering of the arrows.

Date:: 15.01.2011

Parameters:

n	number of arrows on each side (with respect to the whole viewport)
aspect	aspect ratio of the dataset

Definition at line 699 of file RenderWidget.cpp.

void RenderWidget::initGlew ( ) [private]

Initializes GLEW.

This functions initializes the extension loading.

Date:: 15.01.2011

Definition at line 987 of file RenderWidget.cpp.

void RenderWidget::initializeGL ( ) [protected]

Initializes OpenGL.

This functions calls the required functions for OpenGL initilization.

Date:: 15.01.2011

Definition at line 616 of file RenderWidget.cpp.

void RenderWidget::layerAdd ( int layer ) [slot]

Slot to add a layer.

This function adds a layer with the specified index.

Date:: 15.01.2011

Parameters:

layer index

Definition at line 1032 of file RenderWidget.cpp.

void RenderWidget::layerChannelChanged	(	int	channel,
		int	layer
	)		`[slot]`

Slot to update channel number a layer.

This function updates the channel number of the specified layer.

Date:: 15.01.2011

Parameters:

channel	new channel
layer	the specified layer

Definition at line 1007 of file RenderWidget.cpp.

void RenderWidget::layerMove	(	int	layer,
		int	newPos
	)		`[slot]`

Slot to move a layer.

This function moves a layer with the specified index to a new position.

Date:: 15.01.2011

Parameters:

layer	index
newPos	new position

Definition at line 1039 of file RenderWidget.cpp.

void RenderWidget::layerRemove ( int layer ) [slot]

Slot to remove a layer.

This function removes a layer with the specified index.

Date:: 15.01.2011

Parameters:

layer index

Definition at line 1049 of file RenderWidget.cpp.

void RenderWidget::layerTransferImageChanged	(	const QImage &	image,
		int	layer
	)		`[slot]`

Slot to update transfer function of a layer.

This function updates the transfer function 1D image of the specified layer.

Date:: 15.01.2011

Parameters:

image	new transfer function image
layer	the specified layer

Definition at line 1024 of file RenderWidget.cpp.

void RenderWidget::layerTypeChanged	(	int	type,
		int	layer
	)		`[slot]`

Slot to update type of a layer.

This function updates the type of the specified layer.

Date:: 15.01.2011

Parameters:

channel	new channel
layer	the specified layer

Definition at line 1016 of file RenderWidget.cpp.

void RenderWidget::loadChannels ( FlowData * dataset ) [private]

Loads all channels of a dataset.

This functions loads all channels of a dataset. This includes all preprocessing steps necessary and the generation of the displaylists and textures used for rendering.

Date:: 15.01.2011

Parameters:

dataset the dataset which is processed

Definition at line 57 of file RenderWidget.cpp.

void RenderWidget::loadData ( std::string filename ) [private]

Loads Dataset.

This functions loads a new dataset. This includes all preprocessing steps necessary.

Date:: 15.01.2011

Parameters:

filename filename of the dataset

Definition at line 600 of file RenderWidget.cpp.

void RenderWidget::loadDataFile ( ) [slot]

Slot to invoke data file loading.

This functions is used to invoke data file loading.

Date:: 15.01.2011

Definition at line 1189 of file RenderWidget.cpp.

float RenderWidget::minGridDistance	(	vector< vec3 > *	grid,
		int	gridwidth,
		int	gridheight,
		vec3	pos,
		queue< vec3 > *	lastones
	)		`[private]`

Returns the distance to the closest point to pos.

Date:: 15.01.2011

Parameters:

grid	the grid for evenly spaced streamlines
gridwidth	the grid width
gridheight	the grid height
pos	the position for which the grid should be checked
lastones	the list of last few points of this streamline

Returns:: the distance to the closest point to pos, or d_sep if there is no closer point.

Definition at line 461 of file RenderWidget.cpp.

void RenderWidget::paintGL ( ) [protected]

Render function.

This functions is called when the updateGL() function is called. All rendering is done here.

Date:: 15.01.2011

Definition at line 974 of file RenderWidget.cpp.

void RenderWidget::printGLError ( ) [private]

Prints OpenGL Errors.

This functions is used to print OpenGL Errors to the console.

Date:: 15.01.2011

Definition at line 590 of file RenderWidget.cpp.

void RenderWidget::resizeGL	(	int	w,
		int	h
	)		`[protected]`

Resize widget.

This functions is called when the window is resized. It sets the new viewport and updates viewport dependent parameters.

Date:: 15.01.2011

Parameters:

w	new widget width
h	new widget height

Definition at line 964 of file RenderWidget.cpp.

void RenderWidget::settingsEmitSliderValue ( int slider ) [slot]

Slot to invoke update of the gui slider values.

This function invokes the update of the gui slider values.

Date:: 15.01.2011

Definition at line 1098 of file RenderWidget.cpp.

void RenderWidget::settingsSLCompute ( ) [slot]

Slot to invoke streamline computation.

This function invokes the streamline computation. This is used after new streamline parameters have been set.

Date:: 15.01.2011

Definition at line 1159 of file RenderWidget.cpp.

void RenderWidget::settingsSliderChanged	(	int	value,
		int	slider
	)		`[slot]`

Slot to update parameters.

This function updates the parameter corresponding to the specified slider.

Date:: 15.01.2011

Parameters:

value	new value - [0,100]
slider	the specified slider

Definition at line 1058 of file RenderWidget.cpp.

void RenderWidget::settingsSLInverpolationChanged ( int value ) [slot]

Slot to update the streamline interpolation mode.

This function updates the streamline interpolation mode.

Date:: 15.01.2011

Parameters:

value new streamline interpolation mode

Definition at line 1168 of file RenderWidget.cpp.

void RenderWidget::settingsSLModeChanged ( int value ) [slot]

Slot to update the streamline mode.

This function updates the streamline mode.

Date:: 15.01.2011

Parameters:

value new streamline mode

Definition at line 1129 of file RenderWidget.cpp.

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

FlowVis/RenderWidget.h
FlowVis/RenderWidget.cpp

RenderWidget Class Reference

Public Slots

Signals

Public Member Functions

Protected Member Functions

Private Member Functions

Private Attributes

Static Private Attributes

Detailed Description

Member Function Documentation