TransformationSystem

public class TransformationSystem

Coordinates which BaseTransformableNode is currently selected. Also, detects various gestures used by the transformation controls of BaseTransformableNode.

onTouch(HitTestResult, MotionEvent) must be called for gestures to be detected. By default, this is done automatically by ArFragment.

Public Constructors

TransformationSystem(DisplayMetrics displayMetrics, SelectionVisualizer selectionVisualizer)

Public Methods

void
addGestureRecognizer(BaseGestureRecognizer<?> gestureRecognizer)
Adds a gesture recognizer to this transformation system.
DragGestureRecognizer
getDragRecognizer()
Gets the gesture recognizer for determining when the user performs a drag motion on the touch screen.
TransformationGestureDetector
getGestureDetector()
This method is deprecated. Will be removed in release 1.6. Functionality has been merged into TransformationSystem.
GesturePointersUtility
getGesturePointersUtility()
Gets the utility used by BaseGestureRecognizer subclasses to retain/release pointer Ids so that each pointer can only be used in one gesture at a time.
PinchGestureRecognizer
getPinchRecognizer()
Gets the gesture recognizer for determining when the user performs a two-finger pinch motion on the touch screen.
BaseTransformableNode
getSelectedNode()
Gets the currently selected node.
SelectionVisualizer
getSelectionVisualizer()
Gets the selection visualizer used to visualize which BaseTransformableNode is currently selected.
TwistGestureRecognizer
getTwistRecognizer()
Gets the gesture recognizer for determining when the user performs a two-finger twist motion on the touch screen.
void
onTouch(HitTestResult hitTestResult, MotionEvent motionEvent)
Dispatches touch events to the gesture recognizers contained by this transformation system.
boolean
selectNode(BaseTransformableNode node)
Sets a BaseTransformableNode as the selected node if there is no currently selected node or if the currently selected node is not actively being transformed.
void
setSelectionVisualizer(SelectionVisualizer selectionVisualizer)
Sets the selection visualizer used to visualize which BaseTransformableNode is currently selected.

Inherited Methods

Public Constructors

public TransformationSystem (DisplayMetrics displayMetrics, SelectionVisualizer selectionVisualizer)

Parameters
displayMetrics
selectionVisualizer

Public Methods

public void addGestureRecognizer (BaseGestureRecognizer<?> gestureRecognizer)

Adds a gesture recognizer to this transformation system. Touch events will be dispatched to the recognizer when onTouch(HitTestResult, MotionEvent) is called.

Parameters
gestureRecognizer

public DragGestureRecognizer getDragRecognizer ()

Gets the gesture recognizer for determining when the user performs a drag motion on the touch screen.

public TransformationGestureDetector getGestureDetector ()

This method was deprecated in API level .
Will be removed in release 1.6. Functionality has been merged into TransformationSystem.

public GesturePointersUtility getGesturePointersUtility ()

Gets the utility used by BaseGestureRecognizer subclasses to retain/release pointer Ids so that each pointer can only be used in one gesture at a time.

public PinchGestureRecognizer getPinchRecognizer ()

Gets the gesture recognizer for determining when the user performs a two-finger pinch motion on the touch screen.

public BaseTransformableNode getSelectedNode ()

Gets the currently selected node. Only the currently selected node can be transformed. Nodes are selected automatically when they are tapped, or when the user begins to translate the node with a drag gesture.

public SelectionVisualizer getSelectionVisualizer ()

Gets the selection visualizer used to visualize which BaseTransformableNode is currently selected.

public TwistGestureRecognizer getTwistRecognizer ()

Gets the gesture recognizer for determining when the user performs a two-finger twist motion on the touch screen.

public void onTouch (HitTestResult hitTestResult, MotionEvent motionEvent)

Dispatches touch events to the gesture recognizers contained by this transformation system.

Parameters
hitTestResult
motionEvent

public boolean selectNode (BaseTransformableNode node)

Sets a BaseTransformableNode as the selected node if there is no currently selected node or if the currently selected node is not actively being transformed. If null, then deselects the currently selected node if the node is not transforming.

Parameters
node
Returns
  • true if the node was successfully selected
See Also

public void setSelectionVisualizer (SelectionVisualizer selectionVisualizer)

Sets the selection visualizer used to visualize which BaseTransformableNode is currently selected. If there is already a selected node, then the old selection visual is removed and the new one is applied immediately.

Parameters
selectionVisualizer

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