GLWidget Class Reference

#include <glwidget.h>

List of all members.

Public Slots

void setXRotation (int angle)

void setYRotation (int angle)

void setZRotation (int angle)

void setLength (int length)

void setWidth (int width)

void setDepth (int depth)

void setColors ()

void setRenderMode (bool mode)

Signals

void xRotationChanged (int angle)

void yRotationChanged (int angle)

void zRotationChanged (int angle)

Public Member Functions

GLWidget (QWidget *parent=0)

QSize minimumSizeHint () const

QSize sizeHint () const

void setVolume (Volume *newVolume)

void setColorsPtr (unsigned int *colorsPtr)

Protected Member Functions

void initializeGL ()

void paintGL ()

void resizeGL (int width, int height)

void mousePressEvent (QMouseEvent *event)

void mouseReleaseEvent (QMouseEvent *event)

void mouseMoveEvent (QMouseEvent *event)

void wheelEvent (QWheelEvent *event)

Private Member Functions

void drawSlice ()

void normalizeAngle (int *angle)

char * file2string (const std::string &strFilename)

GLuint loadShader (const std::string &strFilename)

void printLog (GLuint obj)

void setVertexProp (float s, float t, float p)

void renderBoundingBox ()

void genTransferTexture ()

void initBackfaceBuffer ()

void updateRelVolSize ()

Detailed Description

Sets up a Qt OpenGl Canvas Widget.

Constructor & Destructor Documentation

GLWidget::GLWidget ( QWidget * parent = 0 )

Sets up a Qt OpenGl Canvas.

Parameters:

parent

is the parent window of the canvas.

Member Function Documentation

QSize GLWidget::minimumSizeHint ( ) const

Returns:: The minimum size for the Widget.

QSize GLWidget::sizeHint ( ) const

Returns:: The size hint for the Widget.

void GLWidget::setVolume ( Volume * newVolume )

Sets up the Canvas for a new Volume object.

Parameters:

newVolume

is the new Volume.

void GLWidget::setColorsPtr ( unsigned int * colorsPtr )

Initializes the pointer to the transferfunction array.

Parameters:

colorsPtr

is the pointer to the new array.

void GLWidget::setXRotation ( int angle ) [slot]

Handles rotation of the volume around the X-axis.

Parameters:

angle

is the new X-angle.

void GLWidget::setYRotation ( int angle ) [slot]

Handles rotation of the volume around the Y-axis.

Parameters:

angle

is the new Y-angle.

void GLWidget::setZRotation ( int angle ) [slot]

Handles rotation of the volume around the Z-axis.

Parameters:

angle

is the new Z-angle.

void GLWidget::setLength ( int length ) [slot]

Sets the position and the slice shown by the YZ-Quad in slicemode.

Parameters:

length

is the position of the new slice ([0 .. 1] * 5760).

void GLWidget::setWidth ( int width ) [slot]

Sets the position and the slice shown by the XZ-Quad in slicemode.

Parameters:

width

is the position of the new slice ([0 .. 1] * 5760).

void GLWidget::setDepth ( int depth ) [slot]

Sets the position and the slice shown by the XY-Quad in slicemode.

Parameters:

depth

is the position of the new slice ([0 .. 1] * 5760).

void GLWidget::setColors ( ) [slot]

Updatefunction, called whenever the transferfunction is changed. Sends the new transfertexture to the graphics card.

void GLWidget::setRenderMode ( bool mode ) [slot]

Sets the current Rendermode.

Parameters:

mode

is the new renderMode (0 - raycasting, 1 - sliceview)

void GLWidget::xRotationChanged ( int angle ) [signal]

A signal that is send on a change in the x rotation.

Parameters:

angle

is the angle of the new rotation.

void GLWidget::yRotationChanged ( int angle ) [signal]

A signal that is send on a change in the y rotation.

Parameters:

angle

is the angle of the new rotation.

void GLWidget::zRotationChanged ( int angle ) [signal]

A signal that is send on a change in the z rotation.

Parameters:

angle

is the angle of the new rotation.

void GLWidget::initializeGL ( ) [protected]

Initialzes the OpenGl environment including lighting, textures and shaders.

void GLWidget::paintGL ( ) [protected]

Applys affine transformations and starts the drawing of the frame.

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

Handles resizing of the OpenGl canvas.

Parameters:

	width	is the new width of the canvas.
	height	is the new height of the canvas.

void GLWidget::mousePressEvent ( QMouseEvent * event ) [protected]

Reduces the stepsize of the raycastingshader and initialises volume rotations.

Parameters:

event

is the mousePressEvent.

void GLWidget::mouseReleaseEvent ( QMouseEvent * event ) [protected]

Increases the stepsize of the raycastingshader after finished volume rotations.

Parameters:

event

is the mouseReleaseEvent.

void GLWidget::mouseMoveEvent ( QMouseEvent * event ) [protected]

Handles mouse dragging and rotation of the volume.

Parameters:

event

is the mouseMoveEvent.

void GLWidget::wheelEvent ( QWheelEvent * event ) [protected]

Handles mouseWheelEvents.

Parameters:

event

is the mouseWheelEvent.

void GLWidget::drawSlice ( ) [private]

Renders the 3d-Objects if the current rendermode. Rendermode 0: Raycastingview, renders boundingbox backside into the FBO and frontside into the normal buffer. Rendermode 1: Sliceview, draws 3 Quads depending on current lengthf, widthf and heightf.

void GLWidget::normalizeAngle ( int * angle ) [private]

Keeps angle within [0 360] interval.

Parameters:

angle

is the pointer to the angle.

char * GLWidget::file2string ( const std::string & strFilename ) [private]

Loads a binary file into a Charpointer.

Parameters:

strFilename

ist the filename of the file to load.

Returns:: The Charpointer with the content of the file.

GLuint GLWidget::loadShader ( const std::string & strFilename ) [private]

Handels loading, compiling and attaching of a vertex-, fragmentshader pair to a shader program.

Parameters:

strFilename

is the filepath of the shaders without extension. Loading requires 2 glsl shader files with "<filepath>.vert" and "<filepath>.frag" extension to be successful.

Returns:: The id of the new shaderprogram.

void GLWidget::printLog ( GLuint obj ) [private]

Prints the shaderobject debug log.

Parameters:

obj

specifies the shaderobject.

void GLWidget::setVertexProp	(	float	s,
		float	t,
		float	p
	)			`[private]`

Sets glColor and glTexCoords with the given parameters.

Parameters:

	s
	t
	p

void GLWidget::renderBoundingBox ( ) [private]

Renders the boundingbox of the volume with the longest side normalized to 1.

void GLWidget::genTransferTexture ( ) [private]

Generates the Transferfunction-texture and sends it to the graphics card.

void GLWidget::initBackfaceBuffer ( ) [private]

Generates framebufferobject and texture for the backface rendering.

void GLWidget::updateRelVolSize ( ) [private]

Calculates the relative volumesizes the the longest side normalized to 1.

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

glwidget.h
glwidget.cpp


Public Slots
void	setXRotation (int angle)
void	setYRotation (int angle)
void	setZRotation (int angle)
void	setLength (int length)
void	setWidth (int width)
void	setDepth (int depth)
void	setColors ()
void	setRenderMode (bool mode)
Signals
void	xRotationChanged (int angle)
void	yRotationChanged (int angle)
void	zRotationChanged (int angle)
Public Member Functions
	GLWidget (QWidget *parent=0)
QSize	minimumSizeHint () const
QSize	sizeHint () const
void	setVolume (Volume *newVolume)
void	setColorsPtr (unsigned int *colorsPtr)
Protected Member Functions
void	initializeGL ()
void	paintGL ()
void	resizeGL (int width, int height)
void	mousePressEvent (QMouseEvent *event)
void	mouseReleaseEvent (QMouseEvent *event)
void	mouseMoveEvent (QMouseEvent *event)
void	wheelEvent (QWheelEvent *event)
Private Member Functions
void	drawSlice ()
void	normalizeAngle (int *angle)
char *	file2string (const std::string &strFilename)
GLuint	loadShader (const std::string &strFilename)
void	printLog (GLuint obj)
void	setVertexProp (float s, float t, float p)
void	renderBoundingBox ()
void	genTransferTexture ()
void	initBackfaceBuffer ()
void	updateRelVolSize ()