ScaleController

Page Summary

• ScaleController enables scaling of BaseTransformableNode objects using pinch gestures.

• It provides elastic bounce-back when scaling beyond predefined minimum and maximum limits.

• Sensitivity, elasticity, minimum and maximum scale can be adjusted using the provided methods.

• The ScaleController is triggered by PinchGestureRecognizer events to manipulate the target node's scale.

public class ScaleController

Manipulates the Scale of a BaseTransformableNode using a Pinch PinchGestureRecognizer. Applies a tunable elastic bounce-back when scaling the BaseTransformableNode beyond the min/max scale.

Constants

float	DEFAULT_ELASTICITY
float	DEFAULT_MAX_SCALE
float	DEFAULT_MIN_SCALE
float	DEFAULT_SENSITIVITY

Public Constructors

ScaleController(BaseTransformableNode transformableNode, PinchGestureRecognizer gestureRecognizer)

Public Methods

boolean	canStartTransformation(PinchGesture gesture)
float	getElasticity()
float	getMaxScale()
float	getMinScale()
float	getSensitivity()
void	onActivated(Node node) Notifies the listener that onActivate() was called.
void	onContinueTransformation(PinchGesture gesture)
void	onEndTransformation(PinchGesture gesture)
void	onUpdated(Node node, FrameTime frameTime) Notifies the listener that onUpdate(FrameTime) was called.
void	setElasticity(float elasticity)
void	setMaxScale(float maxScale)
void	setMinScale(float minScale)
void	setSensitivity(float sensitivity)

Inherited Methods

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

abstract boolean	canStartTransformation(PinchGesture gesture)
PinchGesture	getActiveGesture()
BaseTransformableNode	getTransformableNode()
boolean	isEnabled()
boolean	isTransforming()
void	onActivated(Node node) Notifies the listener that onActivate() was called.
abstract void	onContinueTransformation(PinchGesture gesture)
void	onDeactivated(Node node) Notifies the listener that onDeactivate() was called.
abstract void	onEndTransformation(PinchGesture gesture)
void	onFinished(PinchGesture gesture)
void	onGestureStarted(PinchGesture gesture)
void	onUpdated(PinchGesture gesture)
void	onUpdated(Node node, FrameTime frameTime) Notifies the listener that onUpdate(FrameTime) was called.
void	setEnabled(boolean enabled)

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()

From interface com.google.ar.sceneform.ux.BaseGestureRecognizer.OnGestureStartedListener

abstract void

onGestureStarted(PinchGesture gesture)

From interface com.google.ar.sceneform.ux.BaseGesture.OnGestureEventListener

abstract void	onFinished(PinchGesture gesture)
abstract void	onUpdated(PinchGesture gesture)

From interface com.google.ar.sceneform.Node.LifecycleListener

abstract void	onActivated(Node node) Notifies the listener that onActivate() was called.
abstract void	onDeactivated(Node node) Notifies the listener that onDeactivate() was called.
abstract void	onUpdated(Node node, FrameTime frameTime) Notifies the listener that onUpdate(FrameTime) was called.

Constants

public static final float DEFAULT_ELASTICITY

Constant Value: 0.15

public static final float DEFAULT_MAX_SCALE

Constant Value: 1.75

public static final float DEFAULT_MIN_SCALE

Constant Value: 0.75

public static final float DEFAULT_SENSITIVITY

Constant Value: 0.75

Public Constructors

public ScaleController (BaseTransformableNode transformableNode, PinchGestureRecognizer gestureRecognizer)

Parameters

transformableNode
gestureRecognizer

Public Methods

public boolean canStartTransformation (PinchGesture gesture)

Parameters

gesture

public float getElasticity ()

public float getMaxScale ()

public float getMinScale ()

public float getSensitivity ()

public void onActivated (Node node)

Notifies the listener that onActivate() was called.

Parameters

node	the node that was activated

public void onContinueTransformation (PinchGesture gesture)

Parameters

gesture

public void onEndTransformation (PinchGesture gesture)

Parameters

gesture

public void onUpdated (Node node, FrameTime frameTime)

Notifies the listener that onUpdate(FrameTime) was called.

Parameters

node	the node that was updated
frameTime	provides time information for the current frame

public void setElasticity (float elasticity)

Parameters

elasticity

public void setMaxScale (float maxScale)

Parameters

maxScale

public void setMinScale (float minScale)

Parameters

minScale

public void setSensitivity (float sensitivity)

Parameters

sensitivity