inviwo::TouchPoint Class Reference

#include <inviwo/core/interaction/events/touchevent.h>

Public Member Functions
uvec2	canvasSize () const
double	depth () const
int	id () const
	Retrieve touch point id.
dvec3	ndc () const
bool	operator!= (const TouchPoint &b) const
bool	operator== (const TouchPoint &b) const
dvec2	pos () const
	Retrieve position in screen coordinates [0 dim-1]^2.
dvec2	posNormalized () const
	Retrieve position normalized to the size of the screen [0 1]^2.
dvec2	pressedPos () const
	Retrieve the pressed event position in screen coordinates [0 dim-1]^2.
dvec2	pressedPosNormalized () const
	Retrieve the pressed position normalized to the size of the screen [0 1]^2.
double	pressure () const
dvec2	prevPos () const
	Retrieve the previous event position in screen coordinates [0 dim-1]^2.
dvec2	prevPosNormalized () const
	Retrieve the previous position normalized to the size of the screen [0 1]^2.
void	setCanvasSize (uvec2 size)
void	setDepth (double val)
void	setId (int id)
void	setPos (dvec2 val)
void	setPosNormalized (dvec2 val)
void	setPressedPos (dvec2 val)
void	setPressedPosNormalized (dvec2 val)
void	setPressure (double val)
void	setPrevPos (dvec2 val)
void	setPrevPosNormalized (dvec2 val)
TouchState	state () const
	TouchPoint (int id, TouchState touchState, dvec2 posNormalized, dvec2 prevPosNormalized, dvec2 pressedPosNormalized, uvec2 canvasSize, double pressure, double depth=1.0)

Protected Attributes
uvec2	canvasSize_
double	depth_
int	id_
dvec2	posNormalized_
dvec2	pressedPosNormalized_
double	pressure_
dvec2	prevPosNormalized_
TouchState	state_

Detailed Description

Point at which a finger touches a screen or touch pad. Several touch points are contained within a TouchEvent

See also

TouchEvent

Constructor & Destructor Documentation

TouchPoint()

inviwo::TouchPoint::TouchPoint	(	int	id,
		TouchState	touchState,
		dvec2	posNormalized,
		dvec2	prevPosNormalized,
		dvec2	pressedPosNormalized,
		uvec2	canvasSize,
		double	pressure,
		double	depth = 1.0 )

Parameters

id	Touch point id that distinguishes a particular touch point
touchState	State of the touch point.
posNormalized	Position normalized to the size of the screen [0 1]^2.
prevPosNormalized	Previous position normalized to the size of the screen [0 1]^2.
pressedPosNormalized	Position that was pressed normalized to the size of the screen [0 * 1]^2.
canvasSize	size of the canvas from where the event originates
pressure	the pressure of the touch
depth	Depth value in normalized device coordinates ([-1 1]) at touch point, 1 if no depth is available.

Member Function Documentation

depth()

double inviwo::TouchPoint::depth

(

)

const

Retrieve depth value in normalized device coordinates at touch point. Defined in [-1 1], where -1 is the near plane and 1 is the far plane. Will be 1 if no depth value is available.

id()

int inviwo::TouchPoint::id

(

)

const

Retrieve touch point id.

Returns

int

ndc()

dvec3 inviwo::TouchPoint::ndc

(

)

const

Returns the normalized device coordinates. Position and depth normalized to the range of (-1,1) in a left handed coordinate system. The lower left near will be (-1,-1,-1) And the upper right far (1,1,1)

operator!=()

bool inviwo::TouchPoint::operator!=

(

const TouchPoint &

b

)

const

Return true if any positions or state is eifferent, false otherwise.

operator==()

bool inviwo::TouchPoint::operator==

(

const TouchPoint &

b

)

const

Return true if all positions and state are the same, false otherwise.

pressure()

double inviwo::TouchPoint::pressure

(

)

const

Return how hard the touch point is being pressed.

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

• include/inviwo/core/interaction/events/touchevent.h