Package komposten.leapjna.leapc.data

Class LEAP_HAND

java.lang.Object

com.sun.jna.Structure

komposten.leapjna.leapc.data.LEAP_HAND

@FieldOrder({"id","flags","type","confidence","visible_time","pinch_distance","grab_angle","pinch_strength","grab_strength","palm","digits","arm"})
public class LEAP_HAND
extends Structure

Describes a tracked hand.

Since:

LeapJna 1.0.0, Ultraleap Orion SDK 3.0.0

See Also:

• LeapC API - LEAP_HAND

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	LEAP_HAND.DigitStruct	A struct to store the digits of a hand.

Nested classes/interfaces inherited from class com.sun.jna.Structure

Structure.ByReference, Structure.ByValue, Structure.FieldOrder, Structure.StructField

Field Summary

Fields

Modifier and Type	Field	Description
LEAP_BONE	arm	The arm to which this hand is attached.
float	confidence	How confident we are with a given hand pose.
LEAP_HAND.DigitStruct	digits	The fingers of this hand.
int	flags	Reserved for future use.
float	grab_angle	The average angle of fingers to palm.
float	grab_strength	The normalized estimate of the grab hand pose.
int	id	A unique ID for a hand tracked across frames.
LEAP_PALM	palm	Additional information associated with the palm.
float	pinch_distance	The distance between index finger and thumb.
float	pinch_strength	The normalized estimate of the pinch pose.
int	type	The chirality of this hand.
long	visible_time	The total amount of time this hand has been tracked, in microseconds.

Fields inherited from class com.sun.jna.Structure

ALIGN_DEFAULT, ALIGN_GNUC, ALIGN_MSVC, ALIGN_NONE, CALCULATE_SIZE

Constructor Summary

Constructors

Constructor	Description
LEAP_HAND()
LEAP_HAND(Pointer pointer)

Method Summary

Modifier and Type	Method	Description
eLeapHandType	getType()

Methods inherited from class com.sun.jna.Structure

allocateMemory, allocateMemory, autoAllocate, autoRead, autoRead, autoWrite, autoWrite, cacheTypeInfo, calculateSize, clear, createFieldsOrder, createFieldsOrder, createFieldsOrder, createFieldsOrder, dataEquals, dataEquals, ensureAllocated, equals, fieldOffset, getAutoRead, getAutoWrite, getFieldList, getFieldOrder, getFields, getNativeAlignment, getNativeSize, getNativeSize, getPointer, getStringEncoding, getStructAlignment, hashCode, newInstance, newInstance, read, readField, readField, setAlignType, setAutoRead, setAutoSynch, setAutoWrite, setStringEncoding, size, sortFields, toArray, toArray, toString, toString, useMemory, useMemory, write, writeField, writeField, writeField

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Details

id

public int id

A unique ID for a hand tracked across frames.

If tracking of a physical hand is lost, a new ID is assigned when tracking is reacquired.

flags

public int flags

Reserved for future use.

type

public int type

The chirality of this hand. Either 0 (left) or 1 (right). Use getType() to get the type as a eLeapHandType value.

confidence

public float confidence

How confident we are with a given hand pose.

Not currently used (always 1.0).

visible_time

public long visible_time

The total amount of time this hand has been tracked, in microseconds.

pinch_distance

public float pinch_distance

The distance between index finger and thumb.

grab_angle

public float grab_angle

The average angle of fingers to palm.

pinch_strength

public float pinch_strength

The normalized estimate of the pinch pose.

Zero is not pinching; one is fully pinched.

grab_strength

public float grab_strength

The normalized estimate of the grab hand pose.

Zero is not grabbing; one is fully grabbing.

palm

public LEAP_PALM palm

Additional information associated with the palm.

digits

public LEAP_HAND.DigitStruct digits

The fingers of this hand.

arm

public LEAP_BONE arm

The arm to which this hand is attached.

An arm consists of a single LEAP_BONE struct.

Constructor Details

LEAP_HAND

public LEAP_HAND()

LEAP_HAND

public LEAP_HAND(Pointer pointer)

Method Details

getType

public eLeapHandType getType()

Returns:

The hand type as an eLeapHandType instead of a byte.