Collaboration diagram for Hands Generator:

Functions
XN_C_API XnStatus	xnCreateHandsGenerator (XnContext pContext, XnNodeHandle phHandsGenerator, XnNodeQuery pQuery, XnEnumerationErrors pErrors)
	Creates an hands generator.
XN_C_API XnStatus	xnRegisterHandCallbacks (XnNodeHandle hInstance, XnHandCreate CreateCB, XnHandUpdate UpdateCB, XnHandDestroy DestroyCB, void pCookie, XnCallbackHandle phCallback)
	Register to hands callbacks.
XN_C_API XnStatus	xnSetTrackingSmoothing (XnNodeHandle hInstance, XnFloat fFactor)
	Change smoothing factor.
XN_C_API XnStatus	xnStartTracking (XnNodeHandle hInstance, const XnPoint3D *pPosition)
	Start tracking at a specific position.
XN_C_API XnStatus	xnStopTracking (XnNodeHandle hInstance, XnUserID user)
	Stop tracking a specific hand.
XN_C_API XnStatus	xnStopTrackingAll (XnNodeHandle hInstance)
	Stop tracking all hands.
XN_C_API void	xnUnregisterHandCallbacks (XnNodeHandle hInstance, XnCallbackHandle hCallback)
	Unregister from hands callbacks.

Detailed Description

A Hands Generator node is a Generator that tracks hand points. It supports all Generator functions, and adds additional functions.

Function Documentation

XN_C_API XnStatus xnCreateHandsGenerator	(	XnContext *	pContext,
		XnNodeHandle *	phHandsGenerator,
		XnNodeQuery *	pQuery,
		XnEnumerationErrors *	pErrors
	)

Creates an hands generator.

Parameters:

pContext	[in] The context in which to create the hands generator.
phHandsGenerator	[out] A handle to the created hands generator.
pQuery	[in] Optional. Can be used to select which hands generator to create. If not specified, this function may create any hands generator that is available.
pErrors	[in] Optional. If provided, will be filled with information about hands generators that could not be created.

XN_C_API XnStatus xnRegisterHandCallbacks	(	XnNodeHandle	hInstance,
		XnHandCreate	CreateCB,
		XnHandUpdate	UpdateCB,
		XnHandDestroy	DestroyCB,
		void *	pCookie,
		XnCallbackHandle *	phCallback
	)

Register to hands callbacks.

Parameters:

hInstance	[in] A handle to the instance
CreateCB	[in] Callback to be called when a new hand is created
UpdateCB	[in] Callback to be called when an existing hand has a new position
DestroyCB	[in] Callback to be called when an existing hand has vanished
pCookie	[in] User's cookie, to be delivered to the callbacks
phCallback	[out] The handle to these callbacks, to allow unregistration

XN_C_API XnStatus xnSetTrackingSmoothing	(	XnNodeHandle	hInstance,
		XnFloat	fFactor
	)

Change smoothing factor.

Parameters:

hInstance	[in] A handle to the instance
fFactor	[in] Smoothing factor, in the range 0..1. 0 Means no smoothing, 1 means infinite smoothing. Inside the range is generator dependent.

XN_C_API XnStatus xnStartTracking	(	XnNodeHandle	hInstance,
		const XnPoint3D *	pPosition
	)

Start tracking at a specific position.

Parameters:

hInstance	[in] A handle to the instance
pPosition	[in] The position at which there is a new hand

XN_C_API XnStatus xnStopTracking	(	XnNodeHandle	hInstance,
		XnUserID	user
	)

Stop tracking a specific hand.

Parameters:

hInstance	[in] A handle to the instance
user	[in] The hand to stop tracking

XN_C_API XnStatus xnStopTrackingAll ( XnNodeHandle hInstance )

Stop tracking all hands.

Parameters:

hInstance [in] A handle to the instance

XN_C_API void xnUnregisterHandCallbacks	(	XnNodeHandle	hInstance,
		XnCallbackHandle	hCallback
	)

Unregister from hands callbacks.

Parameters:

hInstance	[in] A handle to the instance
hCallback	[in] The handle received from registration