TwistGesture

Page Summary

• TwistGesture detects and tracks two-finger twist motions on a touchscreen.

• It provides getDeltaRotationDegrees() to measure the rotation change in degrees.

• Developers can use OnGestureEventListener to receive callbacks for twist gesture events (start, finish, cancel).

• TwistGesture inherits functionality from BaseGesture for gesture management.

• The gesture can be targeted to a specific Node in the scene.

public class TwistGesture

Gesture for when the user performs a two-finger twist motion on the touch screen.

Nested Classes

interface

TwistGesture.OnGestureEventListener

Interface definition for callbacks to be invoked by a TwistGesture.

Inherited Fields

From class com.google.ar.sceneform.ux.BaseGesture

protected final GesturePointersUtility	gesturePointersUtility
protected Node	targetNode

Public Constructors

TwistGesture(GesturePointersUtility gesturePointersUtility, MotionEvent motionEvent, int pointerId2)

Public Methods

float

getDeltaRotationDegrees()

Protected Methods

boolean	canStart(HitTestResult hitTestResult, MotionEvent motionEvent)
TwistGesture	getSelf()
void	onCancel()
void	onFinish()
void	onStart(HitTestResult hitTestResult, MotionEvent motionEvent)
boolean	updateGesture(HitTestResult hitTestResult, MotionEvent motionEvent)

Inherited Methods

From class com.google.ar.sceneform.ux.BaseGesture

abstract boolean	canStart(HitTestResult hitTestResult, MotionEvent motionEvent)
void	cancel()
void	complete()
abstract TwistGesture	getSelf()
Node	getTargetNode()
boolean	hasFinished()
boolean	hasStarted()
float	inchesToPixels(float inches)
boolean	justStarted()
abstract void	onCancel()
abstract void	onFinish()
abstract void	onStart(HitTestResult hitTestResult, MotionEvent motionEvent)
void	onTouch(HitTestResult hitTestResult, MotionEvent motionEvent)
float	pixelsToInches(float pixels)
void	setGestureEventListener(OnGestureEventListener<TwistGesture> listener)
abstract boolean	updateGesture(HitTestResult hitTestResult, MotionEvent motionEvent)
boolean	wasCancelled()

From class java.lang.Object

Object	clone()
boolean	equals(Object arg0)
void	finalize()
final Class<?>	getClass()
int	hashCode()
final void	notify()
final void	notifyAll()
String	toString()
final void	wait(long arg0, int arg1)
final void	wait(long arg0)
final void	wait()

Public Constructors

public TwistGesture (GesturePointersUtility gesturePointersUtility, MotionEvent motionEvent, int pointerId2)

Parameters

gesturePointersUtility
motionEvent
pointerId2

Public Methods

public float getDeltaRotationDegrees ()

Protected Methods

protected boolean canStart (HitTestResult hitTestResult, MotionEvent motionEvent)

Parameters

hitTestResult
motionEvent

protected TwistGesture getSelf ()

protected void onCancel ()

protected void onFinish ()

protected void onStart (HitTestResult hitTestResult, MotionEvent motionEvent)

Parameters

hitTestResult
motionEvent

protected boolean updateGesture (HitTestResult hitTestResult, MotionEvent motionEvent)

Parameters

hitTestResult
motionEvent