#include <Camera.h>

Inherits tlp::Observable.

Public Member Functions
	Camera (GlScene *scene, Coord center=Coord(0, 0, 0), Coord eyes=Coord(0, 0, 10), Coord up=Coord(0,-1, 0), double zoomFactor=0.5, double sceneRadius=10)

	Camera (GlScene *scene, bool d3)

	~Camera ()

BoundingBox	getBoundingBox () const

Coord	getCenter () const

Coord	getEyes () const

GlScene *	getScene () const

double	getSceneRadius () const

Coord	getUp () const

Vector< int, 4 >	getViewport () const

virtual void	getXML (std::string &outString)

double	getZoomFactor () const

bool	is3D () const

void	move (float speed)

Camera &	operator= (const Camera &camera)

void	rotate (float angle, float x, float y, float z)

Coord	screenTo3DWorld (const Coord &point) const

void	setCenter (const Coord &center)

void	setEyes (const Coord &eyes)

void	setScene (GlScene *scene)

void	setUp (const Coord &up)

virtual void	setWithXML (const std::string &inString, unsigned int &currentPosition)

void	setZoomFactor (double zoomFactor)

void	strafeLeftRight (float speed)

void	strafeUpDown (float speed)

Coord	worldTo2DScreen (const Coord &obj) const

Public Member Functions inherited from tlp::Observable
void	addListener (Observable *const listener) const

void	addObserver (Observable *const observer) const

unsigned int	countListeners () const

unsigned int	countObservers () const

unsigned int	getReceived () const

unsigned int	getSent () const

void	removeListener (Observable *const listener) const

void	removeObserver (Observable *const observerver) const

Additional Inherited Members
Static Public Member Functions inherited from tlp::Observable
static Observable *	getObject (tlp::node n)

static const tlp::VectorGraph &	getObservableGraph ()

static void	holdObservers ()

static bool	isAlive (tlp::node n)

static unsigned int	observersHoldCounter ()

static void	unholdObservers ()

Protected Member Functions inherited from tlp::Observable
	Observable (const Observable &)

tlp::Iterator< tlp::Observable * > *	getObservables () const

bool	hasOnlookers () const

void	notifyObservers ()

void	observableDeleted ()

Observable &	operator= (const Observable &)

void	sendEvent (const Event &message)

virtual void	treatEvent (const Event &message)

virtual void	treatEvents (const std::vector< Event > &events)

Detailed Description

Tulip OpenGL camera object.

This camera can be a 2D or 3D camera After setup you can do some basic operation :

Move, rotate, strafeLeftRight and strafeUpDown to modify poitn of view
You can directly modify camera parameters with setSceneRadius, setZoomFactor, setEyes, setCenter and setUp
You can transform screen coordinates to 3D world coordinates with screenTo3DWorld() function and 3D world coordinates to screen coordinates with worldTo2DScreen() function A camera is a main component of GlLayer and GlScene
See Also
GlLayer

GlScene

Definition at line 48 of file Camera.h.

Constructor & Destructor Documentation

tlp::Camera::Camera	(	GlScene *	scene,
		Coord	center = `Coord(0, 0, 0)`,
		Coord	eyes = `Coord(0, 0, 10)`,
		Coord	up = `Coord(0,-1, 0)`,
		double	zoomFactor = `0.5`,
		double	sceneRadius = `10`
	)

Constructor.

Parameters

scene	A layer is attached to a scene so we have to specify it in the constructor
center	3D coordinates of point visualized by the camera
eye	3D position of the camera
up	normalized up 3D coordinates of the camera
zoomFactor	level of zoom of the camera
sceneRadius	scene radius of the camera

tlp::Camera::Camera	(	GlScene *	scene,
		bool	d3
	)

Constructor : used to create a 2D camera.

tlp::Camera::~Camera ( )

Destructor.

Member Function Documentation

BoundingBox tlp::Camera::getBoundingBox ( ) const

Return the camera bounding box.

This bounding box is the part of the scene visualized by this camera.

Coord tlp::Camera::getCenter ( ) const

inline

Return the center.

3D coordinates of point visualized by the camera

Definition at line 172 of file Camera.h.

Coord tlp::Camera::getEyes ( ) const

inline

Return the eyes.

3D position of the camera

Definition at line 157 of file Camera.h.

GlScene* tlp::Camera::getScene ( ) const

inline

Return the camera's scene.

Definition at line 84 of file Camera.h.

double tlp::Camera::getSceneRadius ( ) const

inline

Return the scene radius.

Definition at line 127 of file Camera.h.

Coord tlp::Camera::getUp ( ) const

inline

Return the up vector.

normalized up 3D coordinates of the camera

Definition at line 187 of file Camera.h.

Vector<int, 4> tlp::Camera::getViewport ( ) const

Return the viewport of the attached scene.

virtual void tlp::Camera::getXML ( std::string & outString )

virtual

Function to export data in outString (in XML format)

double tlp::Camera::getZoomFactor ( ) const

inline

Return the zoom factor.

level of zoom of the camera

Definition at line 142 of file Camera.h.

bool tlp::Camera::is3D ( ) const

inline

Return if the camera is a 3D one.

Definition at line 115 of file Camera.h.

void tlp::Camera::move ( float speed )

This function moves the camera forward or backward depending on the speed.

void tlp::Camera::rotate	(	float	angle,
		float	x,
		float	y,
		float	z
	)

This function rotates the camera's eyes around the center depending on the values passed in.

Coord tlp::Camera::screenTo3DWorld ( const Coord & point ) const

Return the 3D world coordinate for the given screen point.

Warning: This function set up the projection and modelview matrix

void tlp::Camera::setCenter ( const Coord & center )

Set the center.

3D coordinates of point visualized by the camera

void tlp::Camera::setEyes ( const Coord & eyes )

Set the eye.

3D position of the camera

void tlp::Camera::setScene ( GlScene * scene )

Set the camera's scene The viewport is store in the scene, so we must attach camera to a scene.

void tlp::Camera::setUp ( const Coord & up )

Set the up vector.

normalized up 3D coordinates of the camera

virtual void tlp::Camera::setWithXML	(	const std::string &	inString,
		unsigned int &	currentPosition
	)

virtual

Function to set data with inString (in XML format)

void tlp::Camera::setZoomFactor ( double zoomFactor )

Set the zoom factor.

level of zoom of the camera

void tlp::Camera::strafeLeftRight ( float speed )

This function strafes the camera left and right depending on the speed (-/+)

void tlp::Camera::strafeUpDown ( float speed )

This function strafes the camera up and down depending on the speed (-/+)

Coord tlp::Camera::worldTo2DScreen ( const Coord & obj ) const

Return the screen position for the given 3D coordinate.

Warning: This function set up the projection and modelview matrix

Public Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation