VolVis::Gui::RenderWidget Class Reference

#include <RenderWidget.h>

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Detailed Description

This widget inherits the GLWidget of QT and is used for rendering OpenGL-data. It sets up the camera and provides methods for the mouse events for transforming the scene.

Public Slots
void	changeView (bool enablePerspective)
Public Member Functions
void	bindRenderMode (VolumeRendering::Rendering *rendering)
const Util::Camera *	getCamera () const
void	render (bool prepare=true, bool render=true) const
	RenderWidget (QWidget *parent=0)
void	resetTransformations ()
void	rotate (double angle, const Eigen::Vector3d &axis)
void	saveScreenshot (std::string &path)
void	scale (double factor)
void	setupCamera () const
void	translate (const Eigen::Vector2d &t)
	~RenderWidget ()
Protected Member Functions
void	initializeGL ()
void	mouseMoveEvent (QMouseEvent *event)
void	mousePressEvent (QMouseEvent *event)
void	mouseReleaseEvent (QMouseEvent *event)
void	paintGL ()
void	resizeGL (int width, int height)

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Constructor & Destructor Documentation

VolVis::Gui::RenderWidget::RenderWidget

(

QWidget *

parent = 0

)

Constructor. Sets up a new QGLWidget.

Parameters:

parent

parent widget of this one.

VolVis::Gui::RenderWidget::~RenderWidget

(

)

Destructor.

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Member Function Documentation

void VolVis::Gui::RenderWidget::bindRenderMode

(

VolumeRendering::Rendering *

rendering

)

Binds a render mode (e.g. Slicing) to the widget. When rendering the widget, the render-method of the render mode will be called.

Parameters:

rendering

the active render mode which should be used at rendering

void VolVis::Gui::RenderWidget::changeView

(

bool

enablePerspective

)

[slot]

Sets the view to perspective or orthographic projection.

Parameters:

enablePerspective

if true, perspective projection is enabled, otherwise orthographic projection.

const Util::Camera* VolVis::Gui::RenderWidget::getCamera

(

)

const

Returns the camera used for setting up the projection matrix

Returns:

camera which defines the view of the scene

void VolVis::Gui::RenderWidget::initializeGL

(

)

[protected]

Implements all necessary operations for initializing OpenGL.

void VolVis::Gui::RenderWidget::mouseMoveEvent

(

QMouseEvent *

event

)

[protected]

This method is inherited from QWidget and is called when the mouse is pressed and moved over the widget. The transformation of the scene is changed due to which mousebutton has been pressed.

Parameters:

event

contains the parameters of the mouse event (e.g. which button has been used)

void VolVis::Gui::RenderWidget::mousePressEvent

(

QMouseEvent *

event

)

[protected]

This method is inherited from QWidget and is called when a mouse button is pressed. It is needed to change the quality of rendering before the scene is transformed.

Parameters:

event

contains the parameters of the mouse event (e.g. which button has been used)

void VolVis::Gui::RenderWidget::mouseReleaseEvent

(

QMouseEvent *

event

)

[protected]

This method is inherited from QWidget and is called when a pressed mousebutton is released. This method is needed for changing the quality of rendering after the scene transformation has been finished.

Parameters:

event

contains the parameters of the mouse event (e.g. which button has been used)

void VolVis::Gui::RenderWidget::paintGL

(

)

[protected]

This method is called by the slot updateGL() from the base class QGLWidget. This is needed for the openGL callback. It calls render(true, true).

void VolVis::Gui::RenderWidget::render	(	bool	prepare = true,
		bool	render = true
	)			const

This renders the loaded volume with the selected render mode. Before it assigns the transformations defined by mouse interaction. Sometimes it's useful to only prepare for rendering or only to render and use the preparation of the last frame (e.g. when rendering a high resolution image).

Parameters:

	prepare	Calls the prepareForRender method of the render mode
	render	Calls the render method of the render mode

void VolVis::Gui::RenderWidget::resetTransformations

(

)

Resets the rotation and translation which have been set by rotate/translate.

void VolVis::Gui::RenderWidget::resizeGL	(	int	width,
		int	height
	)			[protected]

This method is called when the size of the widget is changed.

Parameters:

	width	new width of the widget
	height	new height of the widget

void VolVis::Gui::RenderWidget::rotate	(	double	angle,
		const Eigen::Vector3d &	axis
	)

Rotates all objects drawn in the GL area

Parameters:

	angle	rotation angle
	axis	rotation axis

void VolVis::Gui::RenderWidget::saveScreenshot

(

std::string &

path

)

The current content of the render widget will be saved as an image.

Parameters:

path

path to the file where the image should be stored

void VolVis::Gui::RenderWidget::scale

(

double

factor

)

Scales the objects in the GL area by the given factor.

Parameters:

factor

factor with which the scene is scaled

void VolVis::Gui::RenderWidget::setupCamera

(

)

const

Redefines the projection matrix with the camera attached to this render widget.

void VolVis::Gui::RenderWidget::translate

(

const Eigen::Vector2d &

t

)

Translates all objects in the GL area in x and y translation

Parameters:

t

contains the translation in x and y directions

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

• RenderWidget.h

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