# Class WandViewBehavior

java.lang.Object
javax.media.j3d.SceneGraphObject
javax.media.j3d.Node
javax.media.j3d.Leaf
javax.media.j3d.Behavior
com.sun.j3d.utils.behaviors.vp.ViewPlatformBehavior
com.sun.j3d.utils.behaviors.vp.WandViewBehavior

public class WandViewBehavior extends ViewPlatformBehavior
Manipulates view platform transforms using a motion-tracked wand or mouse equipped with a six degree of freedom (6DOF) sensor. An optional two axis (2D) valuator sensor is also directly supported. Default operation is set up to enable both direct manipulation of the view transform and translation back and forth along the direction the 6DOF sensor is pointing; rotation is handled by the 2D valuator if available. An arbitrary number of sensors and action bindings can be customized by accessing this behavior's `SensorEventAgent` directly.

This behavior can be instantiated from the configuration file read by `ConfiguredUniverse` and fully configured using the `ViewPlatformBehaviorProperties` command to set the properties described below, but neither `ConfiguredUniverse` nor `SimpleUniverse` are required by this behavior. Conventional `set` and `get` accessors are provided for configuring this behavior directly; these methods have the same names as the properties but are prefixed with `get` and `set`. Property values are spelled with mixed case strings while the corresponding constant field names for the conventional accessors are spelled with upper case strings and underscores.

`Sensor6D` is the 6DOF sensor to use. This can also be set directly with the appropriate constructor. This sensor must generate 6 degree of freedom position and orientation reads relative to the tracker base in physical units. By default this behavior provides an echo for the 6DOF sensor which indicates its position and orientation in the virtual world; the echo attributes can be set by the `EchoType`, `EchoSize`, `EchoColor`, and `EchoTransparency` properties. See also the `NominalSensorRotation` property, and the `setHotSpot` method of the `Sensor` class.

`Sensor2D` is an optional 2D valuator to use in conjunction with the 6DOF sensor. This can be set directly with the appropriate constructor. The valuator should generate X and Y reads ranging from [-1.0 .. +1.0], with a nominal (deadzone) value of 0.0. The default configuration expects to find these values along the translation components of the read matrix, at indices 3 and 7, but these indices can be also be specified by the `MatrixIndices2D` property.

`ButtonAction6D` sets an action for a specific button on a 6DOF sensor. The actions available are:

- `GrabView` - Directly manipulates the view platform by moving it in inverse response to the sensor's position and orientation, producing the effect of attaching the virtual world to the sensor's movements. If a button is available then this action is bound to button 0 by default.
- `TranslateForward` - Translates the view platform forward along the direction the sensor is pointing; the virtual world appears to move towards the sensor. The default is button 1 if two buttons are available. Related properties are `TranslationSpeed`, `AccelerationTime`, `ConstantSpeedTime`, and `FastSpeedFactor`.
- `TranslateBackward` - Translates the view platform backwards along the direction the sensor is pointing; the virtual world appears to move away from the sensor. The default is button 2 if three buttons are available.
- `RotateCCW` - Rotates the view platform counter-clockwise about a Y axis; the virtual world appears to rotate clockwise. This action is not assigned by default. Related properties are `RotationSpeed`, `RotationCoords`, `TransformCenterSource`, `TransformCenter`, and `AccelerationTime`.
- `RotateCW` - Rotates the view platform clockwise about a Y axis; the virtual world appears to rotate counter-clockwise. This action is not assigned by default.
- `ScaleUp` - Scales the view platform larger so that the virtual world appears to grow smaller. This action is not assigned by default. Related properties are `ScaleSpeed`, `TransformCenterSource`, `TransformCenter`, and `AccelerationTime`.
- `ScaleDown` - Scales the view platform smaller so that the virtual world appears to grow larger. This action is not assigned by default.

`ReadAction2D` sets the action bound to 2D valuator reads; that is, non-zero values generated by the device when no buttons have been pressed. If the value is (0.0, 0.0) or below the threshold value set by `Threshold2D`, then this behavior does nothing; otherwise, the following actions can be performed:

- `Rotation` - Rotates the view platform. This is the default 2D valuator action set by this behavior. Related properties are `RotationSpeed`, `RotationCoords`, `TransformCenterSource`, and `TransformCenter`.
- `Translation` - Translates the view platform. The translation occurs relative to the X and Z basis vectors of either the 6DOF sensor or the view platform if one is not available. The maximum speed is equal to the product of the `TranslationSpeed` and `FastSpeedFactor` property values.
- `Scale` - Scales the view platform smaller with positive Y values and larger with negative Y values. The effect is to increase the apparent size of the virtual world when pushing the valuator forwards and to decrease it when pushing backwards. Related properties are `ScaleSpeed`, `TransformCenterSource`, and `TransformCenter`.

`ButtonAction2D` sets an action for a specific button on the 2D valuator. The available actions are the same as for `ReadAction2D`. No actions are bound by default to the 2D valuator buttons.

The view transform may be reset to its home transform by pressing a number of buttons simultaneously on the 6DOF sensor. The minimum number of buttons that must be pressed is set by `ResetViewButtonCount6D`. This value must be greater than one; the default is three. This action may be disabled by setting the property value to None. The corresponding property for the 2D valuator is `ResetViewButtonCount2D`, with a default value of None. Note, however, that the reset view action will be ineffectual if an action which always modifies the view transform is bound to reads on the sensor used to reset the view, since the reset transform will get overwritten by the read action.

The special value `None` can in general be assigned to any button or read action to prevent any defaults from being bound to it.

Since:
  Java 3D 1.3
See Also:
  - `ConfiguredUniverse`
  - `SensorEventAgent`

## Nested Class Summary

Nested Classes
Modifier and Type
Class
Description
`class`
`WandViewBehavior.EchoReadListener6D`
Implements a 6DOF sensor read listener that updates the orientation and position of the sensor's echo in the virtual world.
`class`
`WandViewBehavior.GrabViewListener6D`
Implements a 6DOF sensor button listener to directly manipulate the view platform transform.
`class`
`WandViewBehavior.ListenerBase`
A base class for implementing some of this behavior's listeners.
`class`
`WandViewBehavior.ResetViewListener`
Resets the view back to the home transform when a specified number of buttons are down simultaneously.
`class`
`WandViewBehavior.RotationListener2D`
Implements a 2D valuator listener that rotates the view platform.
`class`
`WandViewBehavior.RotationListener6D`
Implements a 6DOF sensor button listener that rotates the view platform about a Y axis.
`class`
`WandViewBehavior.ScaleListener2D`
Implements a 2D valuator listener that scales the view platform.
`class`
`WandViewBehavior.ScaleListener6D`
Implements a 6DOF sensor button listener that scales the view platform.
`class`
`WandViewBehavior.TranslationListener2D`
Implements a 2D valuator listener that translates the view platform.
`class`
`WandViewBehavior.TranslationListener6D`
Implements a 6DOF sensor button listener that translates the view platform along the direction the sensor is pointing.

## Field Summary

Fields
Modifier and Type
Field
Description
`static final int`
`BEAM`
Indicates that the echo type is a beam extending from the origin of the sensor's local coordinate system to its hotspot.
`static final int`
`DEGREES`
Indicates that rotation speed should be in degrees.
`static final int`
`ECHO`
Indicates that the 6DOF sensor read action should be bound to displaying the sensor's echo in the virtual world.
`static final int`
`GNOMON`
Indicates that the echo type is a gnomon displaying the directions of the sensor's local coordinate system axes at the location of the sensor's hotspot.
`static final int`
`GRAB_VIEW`
Indicates that a 6DOF sensor button action should be bound to grabbing the view.
`static final int`
`HEAD`
Indicates that rotation should occur in head coordinates.
`static final int`
`HOTSPOT`
Indicates that rotation or scale should be about a 6DOF sensor hotspot.
`static final int`
`NONE`
Indicates a null configuration choice.
`static final int`
`PER_FRAME`
Indicates that translation, rotation, or scaling speeds are per frame.
`static final int`
`PER_SECOND`
Use to indicate that translation, rotation, or scaling speeds are per second.
`static final int`
`PHYSICAL_METERS`
Indicates that translation speed is in physical world units (meters per second or per frame).
`static final int`
`RADIANS`
Indicates that rotation speed should be in radians.
`static final int`
`ROTATE_CCW`
Indicates that a 6DOF sensor button action should be bound to rotate the view plaform counter-clockwise about a Y axis.
`static final int`
`ROTATE_CW`
Indicates that a 6DOF sensor button action should be bound to rotate the view platform clockwise about a Y axis.
`static final int`
`ROTATION`
Indicates that a 2D sensor button or read action should be bound to rotation.
`static final int`
`SCALE`
Indicates that a 2D sensor button or read action should be bound to scaling.
`static final int`
`SCALE_DOWN`
Indicates that a 6DOF sensor button action should be bound to scaling the view platform smaller.
`static final int`
`SCALE_UP`
Indicates that a 6DOF sensor button action should be bound to scaling the view platform larger.
`static final int`
`SENSOR`
Indicates that rotation should occur in sensor coordinates.
`static final int`
`TRANSLATE_BACKWARD`
Indicates that a 6DOF sensor button action should be bound to translating the view backward.
`static final int`
`TRANSLATE_FORWARD`
Indicates that a 6DOF sensor button action should be bound to translating the view forward.
`static final int`
`TRANSLATION`
Indicates that a 2D sensor button or read action should be bound to translation.
`static final int`
`VIEW_PLATFORM`
Indicates that rotation should occur in view platform coordinates.
`static final int`
`VIRTUAL_UNITS`
Indicates that translation speed is in virtual world units.
`static final int`
`VWORLD_FIXED`
Indicates that rotation or scale should be about a fixed point in virtual world coordinates.

### Fields inherited from class ViewPlatformBehavior

`homeTransform, targetTG, vp`

### Fields inherited from class Node

`ALLOW_AUTO_COMPUTE_BOUNDS_READ, ALLOW_AUTO_COMPUTE_BOUNDS_WRITE, ALLOW_BOUNDS_READ, ALLOW_BOUNDS_WRITE, ALLOW_COLLIDABLE_READ, ALLOW_COLLIDABLE_WRITE, ALLOW_LOCAL_TO_VWORLD_READ, ALLOW_LOCALE_READ, ALLOW_PARENT_READ, ALLOW_PICKABLE_READ, ALLOW_PICKABLE_WRITE, ENABLE_COLLISION_REPORTING, ENABLE_PICK_REPORTING`

## Constructor Summary

Constructors
Constructor
Description
`WandViewBehavior()`
Parameterless constructor for this behavior.
`WandViewBehavior(Sensor sensor6D, Sensor sensor2D, int echoType, double echoSize)`
Creates a new instance with the specified sensors and echo parameters.
`WandViewBehavior(Sensor sensor6D, Sensor sensor2D, TransformGroup echo)`
Creates a new instance with the specified sensors and a 6DOF sensor echo parented by the specified `TransformGroup`.
`WandViewBehavior(Sensor sensor6D, Sensor sensor2D, View view, TransformGroup viewTransform, Transform3D homeTransform, TransformGroup echo)`
Creates a new instance with the specified sensors and a 6DOF sensor echo parented by the specified `TransformGroup`.

## Method Summary

Modifier and Type
Method
Description
`void`
`AccelerationTime(Object[] time)`
Property which sets the time interval for accelerating to the translation, rotation, or scale speeds and for transitioning between the normal and fast translation speeds.
`void`
`ButtonAction2D(Object[] action)`
Property which sets a button action for the 2D valuator.
`void`
`ButtonAction6D(Object[] action)`
Property which sets a button action for the 6DOF sensor.
`protected void`
`configureEcho()`
Creates a 6DOF sensor echo according to configuration parameters.
`protected void`
`configureSensorActions()`
Creates the sensor listeners for a 6DOF sensor and/or a 2D valuator sensor using the predefined button and read listeners and the configured action bindings.
`void`
`ConstantSpeedTime(Object[] time)`
Property which sets the time interval for which the translation occurs at the normal speed.
`void`
`EchoColor(Object[] color)`
Property which sets the color of the 6DOF sensor echo.
`void`
`EchoSize(Object[] echoSize)`
Property which sets the size of the 6DOF sensor echo in physical meters.
`void`
`EchoTransparency(Object[] transparency)`
Property which sets the 6DOF sensor echo transparency.
`void`
`EchoType(Object[] type)`
Property which sets the 6DOF sensor echo type.
`void`
`FastSpeedFactor(Object[] factor)`
Property which sets the fast translation speed factor.
`double`
`getAccelerationTime()`
Gets the time interval for accelerating to normal speed and for transitioning between the normal and fast translation speeds.
`int`
`getButtonAction2D(int button)`
Gets the action associated with the specified button on the 2D valuator.
`int`
`getButtonAction6D(int button)`
Gets the action associated with the specified button on the 6DOF sensor.
`double`
`getConstantSpeedTime()`
Gets the time interval for which the translation occurs at the normal speed.
`void`
`getEchoColor(javax.vecmath.Color3f color)`
Gets the 6DOF sensor echo color.
`Shape3D`
`getEchoGeometry()`
Gets the `Shape3D` defining the 6DOF sensor's echo geometry and appearance.
`double`
`getEchoSize()`
Gets the size of the 6DOF sensor echo in meters.
`TransformGroup`
`getEchoTransformGroup()`
Gets the transform group containing a 6DOF sensor's echo geometry.
`float`
`getEchoTransparency()`
Gets the 6DOF sensor echo transparency value.
`int`
`getEchoType()`
Gets the echo type.
`double`
`getFastSpeedFactor()`
Gets the factor by which the normal translation speed is multiplied after the constant speed time interval.
`int`
`getMatrixXIndex2D()`
Gets the index where the X value of a 2D valuator read matrix can be found.
`int`
`getMatrixYIndex2D()`
Gets the index where the Y value of a 2D valuator read matrix can be found.
`void`
`getNominalSensorRotation(Transform3D t3d)`
Gets the nominal sensor transform.
`int`
`getReadAction2D()`
Gets the configured 2D valuator read action.
`int`
`getReadAction6D()`
Gets the configured 6DOF sensor read action.
`int`
`getResetViewButtonCount2D()`
Gets the number of buttons to be pressed simultaneously on the 2D valuator in order to reset the view back to the home transform.
`int`
`getResetViewButtonCount6D()`
Gets the number of buttons to be pressed simultaneously on the 6DOF sensor in order to reset the view back to the home transform.
`int`
`getRotationCoords()`
Gets the rotation coordinate system.
`double`
`getRotationSpeed()`
Gets the rotation speed.
`int`
`getRotationTimeBase()`
Gets the time base for rotation speed.
`int`
`getRotationUnits()`
Gets the rotation speed units
`double`
`getScaleSpeed()`
Gets the scaling speed.
`int`
`getScaleTimeBase()`
Gets the time base for scaling speed.
`Sensor`
`getSensor2D()`
Returns a reference to the 2D valuator used for manipulating the view platform.
`Sensor`
`getSensor6D()`
Returns a reference to the 6DOF sensor used for manipulating the view platform.
`SensorEventAgent`
`getSensorEventAgent()`
Gets the `SensorEventAgent` used by this behavior.
`double`
`getThreshold2D()`
Gets the 2D valuator threshold.
`void`
`getTransformCenter(javax.vecmath.Point3d center)`
Gets the rotation/scale center in virtual world coordinates.
`int`
`getTransformCenterSource()`
Gets the rotation/scale center source.
`double`
`getTranslationSpeed()`
Gets the normal speed at which to translate the view platform.
`int`
`getTranslationTimeBase()`
Gets the time base for translation speed.
`int`
`getTranslationUnits()`
Gets the translation speed units.
`void`
`initialize()`
Initializes and configures this behavior.
`void`
`MatrixIndices2D(Object[] indices)`
Property which specifies where to find the X and Y values in the matrix read generated by a 2D valuator.
`void`
`NominalSensorRotation(Object[] matrix)`
Property which sets the nominal sensor rotation.
`void`
`processStimulus(Enumeration criteria)`
Processes a stimulus meant for this behavior.
`void`
`ReadAction2D(Object[] action)`
Property which sets the action to be bound to 2D valuator reads.
`void`
`ReadAction6D(Object[] action)`
Property which sets the action to be bound to 6DOF sensor reads.
`void`
`ResetViewButtonCount2D(Object[] count)`
Property which sets the number of buttons to be pressed simultaneously on the 2D valuator in order to reset the view back to the home transform.
`void`
`ResetViewButtonCount6D(Object[] count)`
Property which sets the number of buttons to be pressed simultaneously on the 6DOF sensor in order to reset the view back to the home transform.
`void`
`RotationCoords(Object[] coords)`
Property which sets the rotation coordinate system.
`void`
`RotationSpeed(Object[] speed)`
Property which sets the rotation speed.
`void`
`ScaleSpeed(Object[] speed)`
Property which sets the scaling speed.
`void`
`Sensor2D(Object[] sensor)`
Property which sets a 2D sensor for manipulating the view platform.
`void`
`Sensor6D(Object[] sensor)`
Property which sets a 6DOF sensor for manipulating the view platform.
`void`
`setAccelerationTime(double time)`
Sets the time interval for accelerating to the translation, rotation, or scale speeds and for transitioning between the normal and fast translation speeds.
`void`
`setButtonAction2D(int button, int action)`
Sets a button action for the 2D valuator.
`void`
`setButtonAction6D(int button, int action)`
Sets a button action for the 6DOF sensor.
`void`
`setConstantSpeedTime(double time)`
Sets the time interval for which the translation occurs at the normal speed.
`void`
`setEchoColor(javax.vecmath.Color3f color)`
Sets the color of the 6DOF sensor echo.
`void`
`setEchoSize(double echoSize)`
Sets the size of the 6DOF sensor echo in physical meters.
`void`
`setEchoTransformGroup(TransformGroup echo)`
Sets the transform group containing a 6DOF sensor's echo geometry.
`void`
`setEchoTransparency(float transparency)`
Sets the 6DOF sensor echo transparency.
`void`
`setEchoType(int type)`
Sets the 6DOF sensor echo type.
`void`
`setEnable(boolean enable)`
Enables or disables this behavior.
`void`
`setFastSpeedFactor(double factor)`
Sets the fast translation speed factor.
`void`
`setMatrixIndices2D(int xIndex, int yIndex)`
Specifies where to find the X and Y values in the matrix read generated by a 2D valuator.
`void`
`setNominalSensorRotation(Transform3D transform)`
Sets the nominal sensor transform.
`void`
`setReadAction2D(int action)`
Sets the action to be bound to 2D valuator reads.
`void`
`setReadAction6D(int action)`
Sets the action to be bound to 6DOF sensor reads.
`void`
`setResetViewButtonCount2D(int count)`
Sets the number of buttons to be pressed simultaneously on the 2D valuator in order to reset the view back to the home transform.
`void`
`setResetViewButtonCount6D(int count)`
Sets the number of buttons to be pressed simultaneously on the 6DOF sensor in order to reset the view back to the home transform.
`void`
`setRotationCoords(int coords)`
Sets the rotation coordinate system.
`void`
`setRotationSpeed(double speed, int units, int timeBase)`
Sets the rotation speed.
`void`
`setScaleSpeed(double speed, int timeBase)`
Sets the scaling speed.
`void`
`setThreshold2D(double threshold)`
Sets the threshold for 2D valuator reads.
`void`
`setTransformCenter(javax.vecmath.Point3d center)`
Sets the center of rotation and scale if `setTransformCenterSource` is called with `VWORLD_FIXED` or if a 6DOF sensor is not specified.
`void`
`setTransformCenterSource(int source)`
Sets the source of the center of rotation and scale.
`void`
`setTranslationSpeed(double speed, int units, int timeBase)`
Sets the normal translation speed.
`void`
`setViewingPlatform(ViewingPlatform vp)`
Sets the `ViewingPlatform` for this behavior.
`void`
`Threshold2D(Object[] threshold)`
Property which sets the threshold for 2D valuator reads.
`void`
`TransformCenter(Object[] center)`
Property which sets the center of rotation and scale if the `TransformCenterSource` property is `VworldFixed` or if a 6DOF sensor is not specified.
`void`
`TransformCenterSource(Object[] source)`
Property which sets the source of the center of rotation and scale.
`void`
`TranslationSpeed(Object[] speed)`
Property which sets the normal translation speed.
`protected void`
`updateEcho(Sensor sensor, Transform3D sensorToVworld)`
Updates the echo position and orientation.

### Methods inherited from class ViewPlatformBehavior

`getHomeTransform, getViewingPlatform, goHome, setHomeTransform`

### Methods inherited from class Behavior

`getEnable, getNumSchedulingIntervals, getSchedulingBoundingLeaf, getSchedulingBounds, getSchedulingInterval, getView, getWakeupCondition, postId, setSchedulingBoundingLeaf, setSchedulingBounds, setSchedulingInterval, updateNodeReferences, wakeupOn`

### Methods inherited from class Node

`cloneNode, cloneTree, cloneTree, cloneTree, cloneTree, cloneTree, cloneTree, duplicateNode, getBounds, getBoundsAutoCompute, getCollidable, getLocale, getLocalToVworld, getLocalToVworld, getParent, getPickable, setBounds, setBoundsAutoCompute, setCollidable, setPickable`

### Methods inherited from class SceneGraphObject

`clearCapability, clearCapabilityIsFrequent, duplicateSceneGraphObject, getCapability, getCapabilityIsFrequent, getName, getUserData, isCompiled, isLive, setCapability, setCapabilityIsFrequent, setName, setUserData, toString`

### Methods inherited from class Object

`clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait`

## Field Details

### NONE

public static final int NONE
Indicates a null configuration choice.

See Also:
  - Constant Field Values

### GRAB_VIEW

public static final int GRAB_VIEW
Indicates that a 6DOF sensor button action should be bound to grabbing the view. The default is button 0.

See Also:
  - Constant Field Values

### TRANSLATE_FORWARD

public static final int TRANSLATE_FORWARD
Indicates that a 6DOF sensor button action should be bound to translating the view forward. The default is button 1.

See Also:
  - Constant Field Values

### TRANSLATE_BACKWARD

public static final int TRANSLATE_BACKWARD
Indicates that a 6DOF sensor button action should be bound to translating the view backward. The default is button 2.

See Also:
  - Constant Field Values

### ROTATE_CCW

public static final int ROTATE_CCW
Indicates that a 6DOF sensor button action should be bound to rotate the view plaform counter-clockwise about a Y axis.

See Also:
  - Constant Field Values

### ROTATE_CW

public static final int ROTATE_CW
Indicates that a 6DOF sensor button action should be bound to rotate the view platform clockwise about a Y axis.

See Also:
  - Constant Field Values

### SCALE_UP

public static final int SCALE_UP
Indicates that a 6DOF sensor button action should be bound to scaling the view platform larger.

See Also:
  - Constant Field Values

### SCALE_DOWN

public static final int SCALE_DOWN
Indicates that a 6DOF sensor button action should be bound to scaling the view platform smaller.

See Also:
  - Constant Field Values

### TRANSLATION

public static final int TRANSLATION
Indicates that a 2D sensor button or read action should be bound to translation.

See Also:
  - Constant Field Values

### SCALE

public static final int SCALE
Indicates that a 2D sensor button or read action should be bound to scaling.

See Also:
  - Constant Field Values

### ROTATION

public static final int ROTATION
Indicates that a 2D sensor button or read action should be bound to rotation. The default is to bind rotation to the 2D sensor reads.

See Also:
  - Constant Field Values

### PER_FRAME

public static final int PER_FRAME
Indicates that translation, rotation, or scaling speeds are per frame.

See Also:
  - Constant Field Values

### PER_SECOND

public static final int PER_SECOND
Use to indicate that translation, rotation, or scaling speeds are per second. This is the default.

See Also:
  - Constant Field Values

### VIRTUAL_UNITS

public static final int VIRTUAL_UNITS
Indicates that translation speed is in virtual world units.

See Also:
  - Constant Field Values

### PHYSICAL_METERS

public static final int PHYSICAL_METERS
Indicates that translation speed is in physical world units (meters per second or per frame). This is the default.

See Also:
  - Constant Field Values

### RADIANS

public static final int RADIANS
Indicates that rotation speed should be in radians.

See Also:
  - Constant Field Values

### DEGREES

public static final int DEGREES
Indicates that rotation speed should be in degrees. This is the default.

See Also:
  - Constant Field Values

### VIEW_PLATFORM

public static final int VIEW_PLATFORM
Indicates that rotation should occur in view platform coordinates.

See Also:
  - Constant Field Values

### HEAD

public static final int HEAD
Indicates that rotation should occur in head coordinates.

See Also:
  - Constant Field Values

### SENSOR

public static final int SENSOR
Indicates that rotation should occur in sensor coordinates. This is the default.

See Also:
  - Constant Field Values

### VWORLD_FIXED

public static final int VWORLD_FIXED
Indicates that rotation or scale should be about a fixed point in virtual world coordinates.

See Also:
  - Constant Field Values

### HOTSPOT

public static final int HOTSPOT
Indicates that rotation or scale should be about a 6DOF sensor hotspot. This is the default.

See Also:
  - Constant Field Values

### ECHO

public static final int ECHO
Indicates that the 6DOF sensor read action should be bound to displaying the sensor's echo in the virtual world. This is the default.

See Also:
  - Constant Field Values

### GNOMON

public static final int GNOMON
Indicates that the echo type is a gnomon displaying the directions of the sensor's local coordinate system axes at the location of the sensor's hotspot.

See Also:
  - Constant Field Values

### BEAM

public static final int BEAM
Indicates that the echo type is a beam extending from the origin of the sensor's local coordinate system to its hotspot.

See Also:
  - Constant Field Values

## Constructor Details

### WandViewBehavior

public WandViewBehavior()
Parameterless constructor for this behavior. This is called when this behavior is instantiated from a configuration file.

Syntax:
(NewViewPlatformBehavior <name> com.sun.j3d.utils.behaviors.vp.WandViewBehavior)

### WandViewBehavior

public WandViewBehavior(Sensor sensor6D, Sensor sensor2D, int echoType, double echoSize)
Creates a new instance with the specified sensors and echo parameters. At least one sensor must be non-`null`.

This constructor should only be used if either `SimpleUniverse` or `ConfiguredUniverse` is used to set up the view side of the scene graph, or if it is otherwise to be attached to a `ViewingPlatform`. If this behavior is not instantiated from a configuration file then it must then be explicitly attached to a `ViewingPlatform` instance with the `ViewingPlatform.setViewPlatformBehavior` method.

Parameters:
  `sensor6D` - a six degree of freedom sensor which generates reads relative to the tracker base in physical units; may be `null`
  `sensor2D` - 2D valuator which generates X and Y reads ranging from [-1.0 .. +1.0]; may be `null`
  `echoType` - either `GNOMON`, `BEAM`, or `NONE` for the 6DOF sensor echo
  `echoSize` - the width of the 6DOF sensor echo in physical meters; ignored if echoType is `NONE`

### WandViewBehavior

public WandViewBehavior(Sensor sensor6D, Sensor sensor2D, TransformGroup echo)
Creates a new instance with the specified sensors and a 6DOF sensor echo parented by the specified `TransformGroup`. At least one sensor must be non-`null`.

This constructor should only be used if either `SimpleUniverse` or `ConfiguredUniverse` is used to set up the view side of the scene graph, or if it is otherwise to be attached to a `ViewingPlatform`. If this behavior is not instantiated from a configuration file then it must then be explicitly attached to a `ViewingPlatform` instance with the `ViewingPlatform.setViewPlatformBehavior` method.

If the echo `TransformGroup` is non-`null`, it will be added to a new `BranchGroup` and attached to the `ViewingPlatform`, where its transform will be updated in response to the sensor reads. Capabilities to allow writing its transform and to read, write, and extend its children will be set. The echo geometry is assumed to incorporate the position and orientation of the 6DOF sensor hotspot.

Parameters:
  `sensor6D` - a six degree of freedom sensor which generates reads relative to the tracker base in physical units; may be `null`
  `sensor2D` - 2D valuator which generates X and Y reads ranging from [-1.0 .. +1.0]; may be `null`
  `echo` - a `TransformGroup` containing the visible echo which will track the 6DOF sensor's position and orientation, or `null` for no echo

### WandViewBehavior

public WandViewBehavior(Sensor sensor6D, Sensor sensor2D, View view, TransformGroup viewTransform, Transform3D homeTransform, TransformGroup echo)
Creates a new instance with the specified sensors and a 6DOF sensor echo parented by the specified `TransformGroup`. At least one sensor must be non-`null`.

This constructor should only be used if `SimpleUniverse` or `ConfiguredUniverse` is not used to set up the view side of the scene graph. The application must set up the view side itself and supply references to the `View` and the `TransformGroup` containing the view platform transform. `ViewingPlatform.setViewPlatformBehavior` must not be called, and this behavior must be explicitly added to the virtual universe by the application.

If the echo `TransformGroup` is non-`null`, it will only be used to update its associated transform with the position and orientation of a 6DOF sensor (if supplied). The application is responsible for adding the echo to the virtual universe. The echo geometry is assumed to incorporate the position and orientation of the 6DOF sensor hotspot.

Parameters:
  `sensor6D` - a six degree of freedom sensor which generates reads relative to the tracker base in physical units; may be `null`
  `sensor2D` - 2D valuator which generates X and Y reads ranging from [-1.0 .. +1.0]; may be `null`
  `view` - a reference to the `View` attached to the `ViewPlatform` to be manipulated by this behavior
  `viewTransform` - a `TransformGroup` containing the view platform transform; appropriate capabilities to update the transform must be set
  `homeTransform` - a `Transform3D` containing the view transform to be used when the view is reset; may be `null` for identity
  `echo` - a `TransformGroup` containing the visible echo which will track the 6DOF sensor's position and orientation, or `null` for no echo; appropriate capabilities to update the transform must be set

## Method Details

### initialize

public void initialize()
Initializes and configures this behavior. NOTE: Applications should not call this method. It is called by the Java 3D behavior scheduler.

Specified by:
  `initialize` in class `Behavior`

### processStimulus

public void processStimulus(Enumeration criteria)
Processes a stimulus meant for this behavior. NOTE: Applications should not call this method. It is called by the Java 3D behavior scheduler.

Specified by:
  `processStimulus` in class `Behavior`
Parameters:
  `criteria` - an enumeration of triggered wakeup criteria for this behavior

### setEnable

public void setEnable(boolean enable)
Enables or disables this behavior. The default state is enabled.

Overrides:
  `setEnable` in class `Behavior`
Parameters:
  `enable` - true or false to enable or disable this behavior

### setViewingPlatform

public void setViewingPlatform(ViewingPlatform vp)
Sets the `ViewingPlatform` for this behavior. If a subclass overrides this method, it must call `super.setViewingPlatform(vp)`. NOTE: Applications should not call this method. It is called by the `ViewingPlatform`.

Overrides:
  `setViewingPlatform` in class `ViewPlatformBehavior`
Parameters:
  `vp` - the target ViewingPlatform for this behavior

### configureSensorActions

protected void configureSensorActions()
Creates the sensor listeners for a 6DOF sensor and/or a 2D valuator sensor using the predefined button and read listeners and the configured action bindings.

This is invoked the first time `initialize` is called. This method can be overridden by subclasses to modify the configured bindings or introduce other configuration parameters.

### configureEcho

protected void configureEcho()
Creates a 6DOF sensor echo according to configuration parameters. This is done only if a 6DOF sensor has been specified, the 6DOF sensor read action has been set to echo the sensor position, the echo transform group has not already been set, and a ViewingPlatform is in use. This is invoked the first time `initialize` is called to set this behavior live, but before the echo transform group is added to a `BranchGroup` and made live. This method can be overridden to support other echo geometry.

### updateEcho

protected void updateEcho(Sensor sensor, Transform3D sensorToVworld)
Updates the echo position and orientation. The echo is placed at the sensor hotspot position if applicable. This implementation assumes the hotspot position and orientation have been incorporated into the echo geometry.

Parameters:
  `sensor` - the sensor to be echoed
  `sensorToVworld` - transform from sensor coordinates to virtual world coordinates
See Also:
  - `setEchoType(int)`
  - `setEchoSize(double)`
  - `setReadAction6D(int)`
  - `SensorGnomonEcho`
  - `SensorBeamEcho`

### Sensor6D

public void Sensor6D(Object[] sensor)
Property which sets a 6DOF sensor for manipulating the view platform. This sensor must generate 6 degree of freedom orientation and position data in physical meters relative to the sensor's tracker base.

This property is set in the configuration file. The first command form assumes that a `ViewingPlatform` is being used and that the sensor name can be looked up from a `ConfiguredUniverse` reference retrieved from `ViewingPlatform.getUniverse`. The second form is preferred and accepts the Sensor reference directly.

Syntax:
(ViewPlatformBehaviorProperty <name> Sensor6D <sensorName>)

Alternative Syntax:
(ViewPlatformBehaviorProperty <name> Sensor6D (Sensor <sensorName>))

Parameters:
  `sensor` - array of length 1 containing a `String` or a `Sensor`

### getSensor6D

public Sensor getSensor6D()
Returns a reference to the 6DOF sensor used for manipulating the view platform.

Returns:
  the 6DOF sensor

### Sensor2D

public void Sensor2D(Object[] sensor)
Property which sets a 2D sensor for manipulating the view platform. This is intended to support devices which incorporate a separate 2D valuator along with the 6DOF sensor. The X and Y values from the valuator should have a continuous range from -1.0 to +1.0, although rotation, translation, and scaling speeds can be scaled to compensate for a different range. The X and Y values are found in the sensor's read matrix at the indices specified by the `MatrixIndices2D` property, with defaults of 3 and 7 (the X and Y translation components) respectively.

This property is set in the configuration file. The first command form assumes that a `ViewingPlatform` is being used and that the sensor name can be looked up from a `ConfiguredUniverse` reference retrieved from `ViewingPlatform.getUniverse`. The second form is preferred and accepts the Sensor reference directly.

Syntax:
(ViewPlatformBehaviorProperty <name> Sensor2D <sensorName>)

Alternative Syntax:
(ViewPlatformBehaviorProperty <name> Sensor2D (Sensor <sensorName>))

Parameters:
  `sensor` - array of length 1 containing a `String` or a `Sensor`

### getSensor2D

public Sensor getSensor2D()
Returns a reference to the 2D valuator used for manipulating the view platform.

Returns:
  the 2D valuator

### ButtonAction6D

public void ButtonAction6D(Object[] action)
Property which sets a button action for the 6DOF sensor. The choices are `TranslateForward`, `TranslateBackward`, `GrabView`, `RotateCCW`, `RotateCW`, `ScaleUp`, `ScaleDown`, or `None`. By default, button 0 is bound to `GrabView`, button 1 is bound to `TranslateForward`, and button 2 is bound to `TranslateBackward`. If there are fewer than three buttons available, then the default button actions with the lower button indices have precedence. A value of `None` indicates that no default action is to be associated with the specified button.

`TranslateForward` moves the view platform forward along the direction the sensor is pointing. `TranslateBackward` does the same, in the opposite direction. `GrabView` directly manipulates the view by moving it in inverse response to the sensor's position and orientation. `RotateCCW` and `RotateCW` rotate about a Y axis, while `ScaleUp` and `ScaleDown` scale the view platform larger and smaller.

Specifying a button index that is greater than that available with the 6DOF sensor will result in an `ArrayOutOfBoundsException` when the behavior is initialized or attached to a `ViewingPlatform`.

This property is set in the configuration file read by `ConfiguredUniverse`.

Syntax:
(ViewPlatformBehaviorProperty <name> ButtonAction6D <button index> [GrabView | TranslateForward | TranslateBackward | RotateCCW | RotateCW | ScaleUp | ScaleDown | None])

Parameters:
  `action` - array of length 2 containing a `Double` and a `String`.
See Also:
  - `setButtonAction6D(int, int)`
  - `Sensor6D`
  - `TranslationSpeed`
  - `AccelerationTime`
  - `ConstantSpeedTime`
  - `FastSpeedFactor`
  - `RotationSpeed`
  - `RotationCoords`
  - `ScaleSpeed`
  - `TransformCenterSource`
  - `TransformCenter`
  - `WandViewBehavior.GrabViewListener6D`
  - `WandViewBehavior.TranslationListener6D`
  - `WandViewBehavior.RotationListener6D`
  - `WandViewBehavior.ScaleListener6D`

### setButtonAction6D

public void setButtonAction6D(int button, int action)
Sets a button action for the 6DOF sensor. The choices are `TRANSLATE_FORWARD`, `TRANSLATE_BACKWARD`, `GRAB_VIEW`, `ROTATE_CCW`, `ROTATE_CW`, `SCALE_UP`, `SCALE_DOWN`, or `NONE`. By default, button 0 is bound to `GRAB_VIEW`, button 1 is bound to `TRANSLATE_FORWARD`, and button 2 is bound to `TRANSLATE_BACKWARD`. If there are fewer than three buttons available, then the default button actions with the lower button indices have precedence. A value of `NONE` indicates that no default action is to be associated with the specified button.

`TRANSLATE_FORWARD` moves the view platform forward along the direction the sensor is pointing. `TRANSLATE_BACKWARD` does the same, in the opposite direction. `GRAB_VIEW` directly manipulates the view by moving it in inverse response to the sensor's position and orientation. `ROTATE_CCW` and `ROTATE_CW` rotate about a Y axis, while `SCALE_UP` and `SCALE_DOWN` scale the view platform larger and smaller.

Specifying a button index that is greater that that available with the 6DOF sensor will result in an `ArrayOutOfBoundsException` when the behavior is initialized or attached to a `ViewingPlatform`.

This method only configures the button listeners pre-defined by this behavior. For complete control over the button actions, access the `SensorEventAgent` used by this behavior directly.

Parameters:
  `button` - index of the button to bind
  `action` - either `TRANSLATE_FORWARD`, `TRANSLATE_BACKWARD`, `GRAB_VIEW`, `ROTATE_CCW`, `ROTATE_CW`,` SCALE_UP`, `SCALE_DOWN`, or `NONE`
See Also:
  - `setTranslationSpeed(double, int, int)`
  - `setAccelerationTime(double)`
  - `setConstantSpeedTime(double)`
  - `setFastSpeedFactor(double)`
  - `setRotationSpeed(double, int, int)`
  - `setRotationCoords(int)`
  - `setScaleSpeed(double, int)`
  - `setTransformCenterSource(int)`
  - `setTransformCenter(Point3d)`
  - `getSensorEventAgent()`
  - `WandViewBehavior.GrabViewListener6D`
  - `WandViewBehavior.TranslationListener6D`
  - `WandViewBehavior.RotationListener6D`
  - `WandViewBehavior.ScaleListener6D`

### getButtonAction6D

public int getButtonAction6D(int button)
Gets the action associated with the specified button on the 6DOF sensor.

Returns:
  the action associated with the button

### ReadAction2D

public void ReadAction2D(Object[] action)
Property which sets the action to be bound to 2D valuator reads. This action will be performed on each frame whenever no button actions have been invoked and the valuator read value is greater than the threshold range specified by the `Threshold2D` property.

The X and Y values from the valuator should have a continuous range from -1.0 to +1.0, although speeds can be scaled to compensate for a different range. The X and Y values are found in the sensor's read matrix at the indices specified by `MatrixIndices2D`, with defaults of 3 and 7 respectively.

The default property value of `Rotation` rotates the view platform in the direction the valuator is pushed. The rotation coordinate system is set by the `RotationCoords` property, with a default of `Sensor`. The rotation occurs about a point in the virtual world set by the `TransformCenterSource` and `TransformCenter` properties, with the default set to rotate about the hotspot of a 6DOF sensor, if one is available, or about the origin of the virtual world if not. The rotation speed is scaled by the valuator read value up to the maximum speed set with the `RotationSpeed` property; the default is 180 degrees per second.

A property value of `Translation` moves the view platform in the direction the valuator is pushed. The translation occurs along the X and Z basis vectors of either a 6DOF sensor or the view platform if a 6DOF sensor is not specified. The translation speed is scaled by the valuator read value up to a maximum set by the product of the `TranslationSpeed` and `FastSpeedFactor` property values.

If this property value is to `Scale`, then the view platform is scaled smaller or larger when the valuator is pushed forward or backward. The scaling occurs about a point in the virtual world set by the `TransformCenterSource` and `TransformCenter` properties. The scaling speed is set with the `ScaleSpeed` property, with a default scale factor of 2.0 per second at the extreme negative range of -1.0, and a factor of 0.5 per second at the extreme positive range of +1.0.

A value of `None` prevents `Rotation` from being bound to the 2D valuator reads.

This property is set in the configuration file read by `ConfiguredUniverse`.

Syntax:
(ViewPlatformBehaviorProperty <name> ReadAction2D [Rotation | Translation | Scale | None])

Parameters:
  `action` - array of length 1 containing a `String`
See Also:
  - `setReadAction2D(int)`
  - `RotationCoords`
  - `RotationSpeed`
  - `TransformCenterSource`
  - `TransformCenter`
  - `TranslationSpeed`
  - `FastSpeedFactor`
  - `ScaleSpeed`
  - `MatrixIndices2D`
  - `WandViewBehavior.RotationListener2D`
  - `WandViewBehavior.TranslationListener2D`
  - `WandViewBehavior.ScaleListener2D`

### setReadAction2D

public void setReadAction2D(int action)
Sets the action to be bound to 2D valuator reads. This action will be performed on each frame whenever no button actions have been invoked and the valuator read value is greater than the threshold range specified by `setThreshold2D`.

The X and Y values from the valuator should have a continuous range from -1.0 to +1.0, although speeds can be scaled to compensate for a different range. The X and Y values are found in the sensor's read matrix at the indices specified by the `setMatrixIndices2D` method, with defaults of 3 and 7 respectively.

The default action of `ROTATION` rotates the view platform in the direction the valuator is pushed. The rotation coordinate system is set by `setRotationCoords`, with a default of `SENSOR`. The rotation occurs about a point in the virtual world set by `setTransformCenterSource` and `setTransformCenter`, with the default set to rotate about the hotspot of a 6DOF sensor, if one is available, or about the origin of the virtual world if not. The rotation speed is scaled by the valuator read value up to the maximum speed set with `setRotationSpeed`; the default is 180 degrees per second.

A value of `TRANSLATION` moves the view platform in the direction the valuator is pushed. The translation occurs along the X and Z basis vectors of either a 6DOF sensor or the view platform if a 6DOF sensor is not specified. The translation speed is scaled by the valuator read value up to a maximum set by the product of the `setTranslationSpeed` and `setFastSpeedFactor` values.

If the value is to `SCALE`, then the view platform is scaled smaller or larger when the valuator is pushed forward or backward. The scaling occurs about a point in the virtual world set by `setTransformCenterSource` and `setTransformCenter`. The scaling speed is set with `setScaleSpeed`, with a default scale factor of 2.0 per second at the extreme negative range of -1.0, and a factor of 0.5 per second at the extreme positive range of +1.0.

A value of `NONE` prevents `ROTATION` from being bound by default to the 2D valuator reads.

This method only configures the read listeners pre-defined by this behavior. For complete control over the read actions, access the `SensorEventAgent` used by this behavior directly.

Parameters:
  `action` - either `ROTATION`, `TRANSLATION`, `SCALE`, or `NONE`
See Also:
  - `setRotationCoords(int)`
  - `setRotationSpeed(double, int, int)`
  - `setTransformCenterSource(int)`
  - `setTransformCenter(Point3d)`
  - `setTranslationSpeed(double, int, int)`
  - `setFastSpeedFactor(double)`
  - `setScaleSpeed(double, int)`
  - `setMatrixIndices2D(int, int)`
  - `getSensorEventAgent()`
  - `WandViewBehavior.RotationListener2D`
  - `WandViewBehavior.TranslationListener2D`
  - `WandViewBehavior.ScaleListener2D`

### getReadAction2D

public int getReadAction2D()
Gets the configured 2D valuator read action.

Returns:
  the action associated with the sensor read

### ButtonAction2D

public void ButtonAction2D(Object[] action)
Property which sets a button action for the 2D valuator. The possible values are `Rotation`, `Translation`, `Scale`, or `None`, with a default of `None`. These actions are the same as those for `ReadAction2D`.

Specifying a button index that is greater that that available with the 2D valuator will result in an `ArrayOutOfBoundsException` when the behavior is initialized or attached to a `ViewingPlatform`.

This property is set in the configuration file read by `ConfiguredUniverse`.

Syntax:
(ViewPlatformBehaviorProperty <name> ButtonAction2D <button index> [Rotation | Translation | Scale | None])

Parameters:
  `action` - array of length 2 containing a `Double` and a `String`.
See Also:
  - `setButtonAction2D(int, int)`
  - `ReadAction2D`
  - `RotationCoords`
  - `RotationSpeed`
  - `TransformCenterSource`
  - `TransformCenter`
  - `TranslationSpeed`
  - `FastSpeedFactor`
  - `ScaleSpeed`
  - `MatrixIndices2D`
  - `WandViewBehavior.RotationListener2D`
  - `WandViewBehavior.TranslationListener2D`
  - `WandViewBehavior.ScaleListener2D`

### setButtonAction2D

public void setButtonAction2D(int button, int action)
Sets a button action for the 2D valuator. The possible values are `ROTATION`, `TRANSLATION`, `SCALE`, or `NONE`, with a default of `NONE`. These actions are the same as those for `setReadAction2D`.

Specifying a button index that is greater that that available with the 2D valuator will result in an `ArrayOutOfBoundsException` when the behavior is initialized or attached to a `ViewingPlatform`.

This method only configures the button listeners pre-defined by this behavior. For complete control over the button actions, access the `SensorEventAgent` used by this behavior directly.

Parameters:
  `button` - index of the button to bind
  `action` - either `ROTATION`, `TRANSLATION`, `SCALE`, or `NONE`
See Also:
  - `setReadAction2D(int)`
  - `setRotationCoords(int)`
  - `setRotationSpeed(double, int, int)`
  - `setTransformCenterSource(int)`
  - `setTransformCenter(Point3d)`
  - `setTranslationSpeed(double, int, int)`
  - `setFastSpeedFactor(double)`
  - `setScaleSpeed(double, int)`
  - `setMatrixIndices2D(int, int)`
  - `getSensorEventAgent()`
  - `WandViewBehavior.RotationListener2D`
  - `WandViewBehavior.TranslationListener2D`
  - `WandViewBehavior.ScaleListener2D`

### getButtonAction2D

public int getButtonAction2D(int button)
Gets the action associated with the specified button on the 2D valuator.

Returns:
  the action associated with the button

### ReadAction6D

public void ReadAction6D(Object[] action)
Property which sets the action to be bound to 6DOF sensor reads. This action will be performed every frame whenever a button action has not been invoked.

The default is `Echo`, which displays a geometric representation of the sensor's current position and orientation in the virtual world. A value of `None` indicates that no default action is to be applied to the sensor's read.

This property is set in the configuration file read by `ConfiguredUniverse`.

Syntax:
(ViewPlatformBehaviorProperty <name> ReadAction6D [Echo | None])

Parameters:
  `action` - array of length 1 containing a `String`
See Also:
  - `setReadAction6D(int)`
  - `WandViewBehavior.EchoReadListener6D`

### setReadAction6D

public void setReadAction6D(int action)
Sets the action to be bound to 6DOF sensor reads. This action will be performed every frame whenever a button action has not been invoked.

The default is `ECHO`, which displays a geometric representation of the sensor's current position and orientation in the virtual world. A value of `NONE` indicates that no default action is to be associated with the sensor's read.

This method only configures the read listeners pre-defined by this behavior. For complete control over the read actions, access the `SensorEventAgent` used by this behavior directly.

Parameters:
  `action` - either `ECHO` or `NONE`
See Also:
  - `WandViewBehavior.EchoReadListener6D`
  - `getSensorEventAgent()`

### getReadAction6D

public int getReadAction6D()
Gets the configured 6DOF sensor read action.

Returns:
  the configured 6DOF sensor read action

### TranslationSpeed

public void TranslationSpeed(Object[] speed)
Property which sets the normal translation speed. The default is 0.1 meters/second in physical units. This property is set in the configuration file read by `ConfiguredUniverse`.

Syntax:
(ViewPlatformBehaviorProperty <name> TranslationSpeed <speed> [PhysicalMeters | VirtualUnits] [PerFrame | PerSecond])

Parameters:
  `speed` - array of length 3; first element is a `Double` for the speed, the second is a `String` for the units, and the third is a `String` for the time base
See Also:
  - `setTranslationSpeed(double, int, int)`

### setTranslationSpeed

public void setTranslationSpeed(double speed, int units, int timeBase)
Sets the normal translation speed. The default is 0.1 physical meters/second.

Parameters:
  `speed` - how fast to translate
  `units` - either `PHYSICAL_METERS` or `VIRTUAL_UNITS`
  `timeBase` - either `PER_SECOND` or `PER_FRAME`

### getTranslationSpeed

public double getTranslationSpeed()
Gets the normal speed at which to translate the view platform.

Returns:
  the normal translation speed

### getTranslationUnits

public int getTranslationUnits()
Gets the translation speed units.

Returns:
  the translation units

### getTranslationTimeBase

public int getTranslationTimeBase()
Gets the time base for translation speed.

Returns:
  the translation time base

### AccelerationTime

public void AccelerationTime(Object[] time)
Property which sets the time interval for accelerating to the translation, rotation, or scale speeds and for transitioning between the normal and fast translation speeds. The default is 1 second. This property is set in the configuration file read by `ConfiguredUniverse`.

Syntax:
(ViewPlatformBehaviorProperty <name> AccelerationTime <seconds>)

Parameters:
  `time` - array of length 1 containing a `Double`
See Also:
  - `setAccelerationTime(double)`

### setAccelerationTime

public void setAccelerationTime(double time)
Sets the time interval for accelerating to the translation, rotation, or scale speeds and for transitioning between the normal and fast translation speeds. The default is 1 second.

Parameters:
  `time` - number of seconds to accelerate to normal or fast speed

### getAccelerationTime

public double getAccelerationTime()
Gets the time interval for accelerating to normal speed and for transitioning between the normal and fast translation speeds.

Returns:
  the acceleration time

### ConstantSpeedTime

public void ConstantSpeedTime(Object[] time)
Property which sets the time interval for which the translation occurs at the normal speed. The default is 8 seconds. This property is set in the configuration file read by `ConfiguredUniverse`.

Syntax:
(ViewPlatformBehaviorProperty <name> ConstantSpeedTime <seconds>)

Parameters:
  `time` - array of length 1 containing a `Double`
See Also:
  - `setConstantSpeedTime(double)`

### setConstantSpeedTime

public void setConstantSpeedTime(double time)
Sets the time interval for which the translation occurs at the normal speed. The default is 8 seconds.

Parameters:
  `time` - number of seconds to translate at a constant speed

### getConstantSpeedTime

public double getConstantSpeedTime()
Gets the time interval for which the translation occurs at the normal speed.

Returns:
  the constant speed time

### FastSpeedFactor

public void FastSpeedFactor(Object[] factor)
Property which sets the fast translation speed factor. The default is 10 times the normal speed. This property is set in the configuration file read by ConfiguredUniverse.

Syntax:
(ViewPlatformBehaviorProperty <name> FastSpeedFactor <factor>)

Parameters:
  `factor` - array of length 1 containing a `Double`
See Also:
  - `setFastSpeedFactor(double)`

### setFastSpeedFactor

public void setFastSpeedFactor(double factor)
Sets the fast translation speed factor. The default is 10 times the normal speed.

Parameters:
  `factor` - scale by which the normal translation speed is multiplied

### getFastSpeedFactor

public double getFastSpeedFactor()
Gets the factor by which the normal translation speed is multiplied after the constant speed time interval.

Returns:
  the fast speed factor

### Threshold2D

public void Threshold2D(Object[] threshold)
Property which sets the threshold for 2D valuator reads. The default is 0.0. It can be set higher to handle noisy valuators. This property is set in the configuration file read by `ConfiguredUniverse`.

Syntax:
(ViewPlatformBehaviorProperty <name> Threshold2D <threshold>)

Parameters:
  `threshold` - array of length 1 containing a `Double`
See Also:
  - `setThreshold2D(double)`

### setThreshold2D

public void setThreshold2D(double threshold)
Sets the threshold for 2D valuator reads. The default is 0.0. It can be set higher to handle noisy valuators.

Parameters:
  `threshold` - if the absolute values of both the X and Y valuator reads are less than this value then the values are ignored

### getThreshold2D

public double getThreshold2D()
Gets the 2D valuator threshold.

Returns:
  the threshold value

### MatrixIndices2D

public void MatrixIndices2D(Object[] indices)
Property which specifies where to find the X and Y values in the matrix read generated by a 2D valuator. The defaults are along the translation components of the matrix, at indices 3 and 7. This property is set in the configuration file read by `ConfiguredUniverse`.

Syntax:
(ViewPlatformBehaviorProperty <name> MatrixIndices2D <X index> <Y index>)

Parameters:
  `indices` - array of length 2 containing `Doubles`
See Also:
  - `setMatrixIndices2D(int, int)`

### setMatrixIndices2D

public void setMatrixIndices2D(int xIndex, int yIndex)
Specifies where to find the X and Y values in the matrix read generated by a 2D valuator. The defaults are along the translation components of the matrix, at indices 3 and 7.

Parameters:
  `xIndex` - index of the X valuator value
  `yIndex` - index of the Y valuator value

### getMatrixXIndex2D

public int getMatrixXIndex2D()
Gets the index where the X value of a 2D valuator read matrix can be found.

Returns:
  the X index in the read matrix

### getMatrixYIndex2D

public int getMatrixYIndex2D()
Gets the index where the Y value of a 2D valuator read matrix can be found.

Returns:
  the Y index in the read matrix

### RotationSpeed

public void RotationSpeed(Object[] speed)
Property which sets the rotation speed. The default is 180 degrees/second. This property is set in the configuration file read by `ConfiguredUniverse`.

Syntax:
(ViewPlatformBehaviorProperty <name> RotationSpeed <speed> [Degrees | Radians] [PerFrame | PerSecond])

Parameters:
  `speed` - array of length 3; first element is a `Double` for the speed, the second is a `String` for the units, and the third is a `String` for the time base
See Also:
  - `setRotationSpeed(double, int, int)`

### setRotationSpeed

public void setRotationSpeed(double speed, int units, int timeBase)
Sets the rotation speed. The default is 180 degrees/second.

Parameters:
  `speed` - how fast to rotate
  `units` - either `DEGREES` or `RADIANS`
  `timeBase` - either `PER_SECOND` or `PER_FRAME`

### getRotationSpeed

public double getRotationSpeed()
Gets the rotation speed.

Returns:
  the rotation speed

### getRotationUnits

public int getRotationUnits()
Gets the rotation speed units

Returns:
  the rotation units

### getRotationTimeBase

public int getRotationTimeBase()
Gets the time base for rotation speed.

Returns:
  the rotation time base

### RotationCoords

public void RotationCoords(Object[] coords)
Property which sets the rotation coordinate system. The default is `Sensor`, which means that the rotation axis is parallel to the XY plane of the current orientation of a specified 6DOF sensor. A value of `ViewPlatform` means the rotation axis is parallel to the XY plane of the view platform. The latter is also the fallback if a 6DOF sensor is not specified. If the value is `Head`, then the rotation occurs in head coordinates.

This property is set in the configuration file read by `ConfiguredUniverse`.

Syntax:
(ViewPlatformBehaviorProperty <name> RotationCoords [Sensor | ViewPlatform | Head])

Parameters:
  `coords` - array of length 1 containing a `String`
See Also:
  - `setRotationCoords(int)`

### setRotationCoords

public void setRotationCoords(int coords)
Sets the rotation coordinate system. The default is `SENSOR`, which means that the rotation axis is parallel to the XY plane of the current orientation of a specified 6DOF sensor. A value of `VIEW_PLATFORM` means the rotation axis is parallel to the XY plane of the view platform. The latter is also the fallback if a 6DOF sensor is not specified. If the value is `HEAD`, then rotation occurs in head coordinates.

Parameters:
  `coords` - either `SENSOR`, `VIEW_PLATFORM`, or `HEAD`

### getRotationCoords

public int getRotationCoords()
Gets the rotation coordinate system.

Returns:
  the rotation coordinate system

### ScaleSpeed

public void ScaleSpeed(Object[] speed)
Property which sets the scaling speed. The default is 2.0 per second, which means magnification doubles the apparent size of the virtual world every second, and minification halves the apparent size of the virtual world every second.

The scaling applied with each frame is `Math.pow(scaleSpeed, frameTime)`, where `frameTime` is the time in seconds that the last frame took to render if the time base is `PerSecond`, or 1.0 if the time base is `PerFrame`. If scaling is performed with the 2D valuator, then the valuator's Y value as specified by `MatrixIndices2D` is an additional scale applied to the exponent. If scaling is performed by the 6DOF sensor, then the scale speed can be inverted with a negative exponent by using the appropriate listener constructor flag.

This property is set in the configuration file read by `ConfiguredUniverse`.

Syntax:
(ViewPlatformBehaviorProperty <name> ScaleSpeed <speed> [PerFrame | PerSecond])

Parameters:
  `speed` - array of length 2; first element is a `Double` for the speed, and the second is a `String` for the time base
See Also:
  - `setScaleSpeed(double, int)`

### setScaleSpeed

public void setScaleSpeed(double speed, int timeBase)
Sets the scaling speed. The default is 2.0 per second, which means magnification doubles the apparent size of the virtual world every second, and minification halves the apparent size of the virtual world every second.

The scaling applied with each frame is `Math.pow(scaleSpeed, frameTime)`, where `frameTime` is the time in seconds that the last frame took to render if the time base is `PER_SECOND`, or 1.0 if the time base is `PER_FRAME`. If scaling is performed with the 2D valuator, then the valuator's Y value as specified by `setMatrixIndices2D` is an additional scale applied to the exponent. If scaling is performed by the 6DOF sensor, then the scale speed can be inverted with a negative exponent by using the appropriate listener constructor flag.

Parameters:
  `speed` - specifies the scale speed
  `timeBase` - either `PER_SECOND` or `PER_FRAME`

### getScaleSpeed

public double getScaleSpeed()
Gets the scaling speed.

Returns:
  the scaling speed

### getScaleTimeBase

public int getScaleTimeBase()
Gets the time base for scaling speed.

Returns:
  the scaling time base

### TransformCenterSource

public void TransformCenterSource(Object[] source)
Property which sets the source of the center of rotation and scale. The default is `Hotspot`, which means the center of rotation or scale is a 6DOF sensor's current hotspot location. The alternative is `VworldFixed`, which uses the fixed virtual world coordinates specified by the `TransformCenter` property as the center. The latter is also the fallback if a 6DOF sensor is not specified. This property is set in the configuration file read by `ConfiguredUniverse`.

Syntax:
(ViewPlatformBehaviorProperty <name> TransformCenterSource [Hotspot | VworldFixed])

Parameters:
  `source` - array of length 1 containing a `String`
See Also:
  - `setTransformCenterSource(int)`

### setTransformCenterSource

public void setTransformCenterSource(int source)
Sets the source of the center of rotation and scale. The default is `HOTSPOT`, which means the center of rotation or scale is a 6DOF sensor's current hotspot location. The alternative is `VWORLD_FIXED`, which uses the fixed virtual world coordinates specified by `setTransformCenter` as the center. The latter is also the fallback if a 6DOF sensor is not specified.

The transform center source can be dynamically updated while the behavior is running.

Parameters:
  `source` - either `HOTSPOT` or `VWORLD_FIXED`

### getTransformCenterSource

public int getTransformCenterSource()
Gets the rotation/scale center source.

Returns:
  the rotation/scale center source

### TransformCenter

public void TransformCenter(Object[] center)
Property which sets the center of rotation and scale if the `TransformCenterSource` property is `VworldFixed` or if a 6DOF sensor is not specified. The default is (0.0, 0.0, 0.0) in virtual world coordinates. This property is set in the configuration file read by `ConfiguredUniverse`.

Syntax:
(ViewPlatformBehaviorProperty <name> TransformCenter <Point3d>)

Parameters:
  `center` - array of length 1 containing a `Point3d`
See Also:
  - `setTransformCenter(Point3d)`

### setTransformCenter

public void setTransformCenter(javax.vecmath.Point3d center)
Sets the center of rotation and scale if `setTransformCenterSource` is called with `VWORLD_FIXED` or if a 6DOF sensor is not specified. The default is (0.0, 0.0, 0.0) in virtual world coordinates.

The transform center can be dynamically updated while the behavior is running.

Parameters:
  `center` - point in virtual world coordinates about which to rotate and scale

### getTransformCenter

public void getTransformCenter(javax.vecmath.Point3d center)
Gets the rotation/scale center in virtual world coordinates.

Parameters:
  `center` - `Point3d` to receive a copy of the rotation/scale center

### NominalSensorRotation

public void NominalSensorRotation(Object[] matrix)
Property which sets the nominal sensor rotation. The default is the identity transform.

This behavior assumes that when a hand-held wand is pointed directly at a screen in an upright position, then its 6DOF sensor's local coordinate system axes (its basis vectors) are nominally aligned with the image plate basis vectors; specifically, that the sensor's -Z axis points toward the screen, the +Y axis points up, and the +X axis points to the right. The translation and rotation listeners provided by this behavior assume this orientation to determine the transforms to be applied to the view platform; for example, translation applies along the sensor Z axis, while rotation applies about axes defined in the sensor XY plane.

This nominal alignment may not hold true depending upon how the sensor is mounted and how the specific `InputDevice` supporting the sensor handles its orientation. The `NominalSensorRotation` property can be used to correct the alignment by specifying the rotation needed to transform vectors from the nominal sensor coordinate system, aligned with the image plate coordinate system as described above, to the sensor's actual local coordinate system.

NOTE: the nominal sensor transform applies only to the translation directions and rotation axes created by the listeners defined in this behavior; for compatibility with the core Java 3D API, sensor reads and the sensor hotspot location are still expressed in the sensor's local coordinate system.

This property is set in the configuration file read by `ConfiguredUniverse`.

Syntax:
(ViewPlatformBehaviorProperty <name> NominalSensorRotation [<Matrix4d> | <Matrix3d>])

Parameters:
  `matrix` - array of length 1 containing a `Matrix4d` or `Matrix3d`
See Also:
  - `setNominalSensorRotation(Transform3D)`

### setNominalSensorRotation

public void setNominalSensorRotation(Transform3D transform)
Sets the nominal sensor transform. The default is the identity transform.

This behavior assumes that when a hand-held wand is pointed directly at a screen in an upright position, then its 6DOF sensor's local coordinate system axes (its basis vectors) are nominally aligned with the image plate basis vectors; specifically, that the sensor's -Z axis points toward the screen, the +Y axis points up, and the +X axis points to the right. The translation and rotation listeners provided by this behavior assume this orientation to determine the transforms to be applied to the view platform, in that translation applies along the sensor Z axis, and rotation applies about axes defined in the sensor XY plane.

This nominal alignment may not hold true depending upon how the sensor is mounted and how the specific `InputDevice` supporting the sensor handles its orientation. `setNominalSensorRotation` can be called to correct the alignment by specifying the rotation needed to transform vectors from the nominal sensor coordinate system, aligned with the image plate coordinate system as described above, to the sensor's actual local coordinate system.

NOTE: the nominal sensor transform applies only to the translation directions and rotation axes created by the listeners defined in this behavior; for compatibility with the core Java 3D API, sensor reads and the sensor hotspot location are still expressed in the sensor's local coordinate system.

Parameters:
  `transform` - Rotates vectors from the nominal sensor coordinate system system to the sensor's local coordinate system; only the rotational components are used. May be set `null` for identity.

### getNominalSensorRotation

public void getNominalSensorRotation(Transform3D t3d)
Gets the nominal sensor transform.

Parameters:
  `t3d` - `Transform3D` to receive a copy of the nominal sensor transform

### ResetViewButtonCount6D

public void ResetViewButtonCount6D(Object[] count)
Property which sets the number of buttons to be pressed simultaneously on the 6DOF sensor in order to reset the view back to the home transform. The value must be greater than 1; the default is 3. A value of `None` disables this action. This property is set in the configuration file read by `ConfiguredUniverse`.

Syntax:
(ViewPlatformBehaviorProperty <name> ResetViewButtonCount6D [<count> | None])

Parameters:
  `count` - array of length 1 containing a `Double` or `String`
See Also:
  - `setResetViewButtonCount6D(int)`
  - `ViewPlatformBehavior.setHomeTransform`

### setResetViewButtonCount6D

public void setResetViewButtonCount6D(int count)
Sets the number of buttons to be pressed simultaneously on the 6DOF sensor in order to reset the view back to the home transform. The value must be greater than 1; the default is 3. A value of `NONE` disables this action.

Parameters:
  `count` - either `NONE` or button count > 1
See Also:
  - `ViewPlatformBehavior.setHomeTransform`

### getResetViewButtonCount6D

public int getResetViewButtonCount6D()
Gets the number of buttons to be pressed simultaneously on the 6DOF sensor in order to reset the view back to the home transform. A value of `NONE` indicates this action is disabled.

Returns:
  the number of buttons to press simultaneously for a view reset

### ResetViewButtonCount2D

public void ResetViewButtonCount2D(Object[] count)
Property which sets the number of buttons to be pressed simultaneously on the 2D valuator in order to reset the view back to the home transform. The value must be greater than 1; the default is `None`. A value of `None` disables this action. This property is set in the configuration file read by `ConfiguredUniverse`.

Syntax:
(ViewPlatformBehaviorProperty <name> ResetViewButtonCount2D [<count> | None])

Parameters:
  `count` - array of length 1 containing a `Double` or `String`
See Also:
  - `setResetViewButtonCount2D(int)`
  - `ViewPlatformBehavior.setHomeTransform`

### setResetViewButtonCount2D

public void setResetViewButtonCount2D(int count)
Sets the number of buttons to be pressed simultaneously on the 2D valuator in order to reset the view back to the home transform. The value must be greater than 1; the default is `NONE`. A value of `NONE` disables this action.

Parameters:
  `count` - either `NONE` or button count > 1
See Also:
  - `ViewPlatformBehavior.setHomeTransform`

### getResetViewButtonCount2D

public int getResetViewButtonCount2D()
Gets the number of buttons to be pressed simultaneously on the 2D valuator in order to reset the view back to the home transform. A value of `NONE` indicates this action is disabled.

Returns:
  the number of buttons to press simultaneously for a view reset

### EchoType

public void EchoType(Object[] type)
Property which sets the 6DOF sensor echo type. The default is `Gnomon`, which displays an object with points indicating the direction of each of the sensor's coordinate system axes at the location of the sensor's hotspot. The alternative is `Beam`, which displays a beam from the sensor's origin to the location of the sensor's hotspot; the hotspot must not be (0, 0, 0) or an `IllegalArgumentException` will result. The width of each of these echo types is specified by the `EchoSize` property. The `EchoType` property is set in the configuration file read by `ConfiguredUniverse`.

Syntax:
(ViewPlatformBehaviorProperty <name> EchoType [Gnomon | Beam | None])

Parameters:
  `type` - array of length 1 containing a `String`
See Also:
  - `setEchoType(int)`

### setEchoType

public void setEchoType(int type)
Sets the 6DOF sensor echo type. The default is `GNOMON`, which displays an object with points indicating the direction of each of the sensor's coordinate axes at the location of the sensor's hotspot. The alternative is `BEAM`, which displays a beam from the sensor's origin to the location of the sensor's hotspot; the hotspot must not be (0, 0, 0) or an `IllegalArgumentException` will result. The width of each of these echo types is specified by `setEchoSize`.

Parameters:
  `type` - `GNOMON`, `BEAM`, or `NONE` are recognized

### getEchoType

public int getEchoType()
Gets the echo type.

Returns:
  the echo type

### EchoSize

public void EchoSize(Object[] echoSize)
Property which sets the size of the 6DOF sensor echo in physical meters. This is used for the width of the gnomon and beam echoes. The default is 1 centimeter. This property is set in the configuration file read by `ConfiguredUniverse`.

Syntax:
(ViewPlatformBehaviorProperty <name> EchoSize <size>)

Parameters:
  `echoSize` - array of length 1 containing a `Double`
See Also:
  - `setEchoSize(double)`

### setEchoSize

public void setEchoSize(double echoSize)
Sets the size of the 6DOF sensor echo in physical meters. This is used for the width of the gnomon and beam echoes. The default is 1 centimeter.

Parameters:
  `echoSize` - the size in meters

### getEchoSize

public double getEchoSize()
Gets the size of the 6DOF sensor echo in meters.

Returns:
  the echo size

### EchoColor

public void EchoColor(Object[] color)
Property which sets the color of the 6DOF sensor echo. The default is white. This property is set in the configuration file read by `ConfiguredUniverse`.

Syntax:
(ViewPlatformBehaviorProperty <name> EchoColor <red> <green> <blue>)

Parameters:
  `color` - array of length 3 containing `Doubles`
See Also:
  - `setEchoColor(Color3f)`

### setEchoColor

public void setEchoColor(javax.vecmath.Color3f color)
Sets the color of the 6DOF sensor echo. The default is white. This can be called to set the color before or after the echo geometry is created.

Parameters:
  `color` - the echo color

### getEchoColor

public void getEchoColor(javax.vecmath.Color3f color)
Gets the 6DOF sensor echo color.

Parameters:
  `color` - the `Color3f` into which to copy the echo color

### EchoTransparency

public void EchoTransparency(Object[] transparency)
Property which sets the 6DOF sensor echo transparency. The default is opaque. A value of 0.0 is fully opaque and 1.0 is fully transparent. This property is set in the configuration file read by `ConfiguredUniverse`.

Syntax:
(ViewPlatformBehaviorProperty <name> EchoTransparency <transparency>)

Parameters:
  `transparency` - array of length 1 containing a `Double`
See Also:
  - `setEchoTransparency(float)`

### setEchoTransparency

public void setEchoTransparency(float transparency)
Sets the 6DOF sensor echo transparency. The default is opaque. A value of 0.0 is fully opaque and 1.0 is fully transparent. This can be called to set the transparency before or after the echo geometry is created.

Parameters:
  `transparency` - the transparency value

### getEchoTransparency

public float getEchoTransparency()
Gets the 6DOF sensor echo transparency value.

Returns:
  the transparency value

### setEchoTransformGroup

public void setEchoTransformGroup(TransformGroup echo)
Sets the transform group containing a 6DOF sensor's echo geometry. This is used to specify a custom echo. Its transform will be manipulated to represent the position and orientation of the 6DOF sensor. Capabilities to allow writing its transform and to read, write, and extend its children will be set.

This method must be called before the behavior is made live in order to have an effect.

Parameters:
  `echo` - the `TransformGroup` containing the echo geometry

### getEchoTransformGroup

public TransformGroup getEchoTransformGroup()
Gets the transform group containing a 6DOF sensor's echo geometry. Capabilities to write its transform and read, write, and extend its children are granted.

Returns:
  the echo's transform group

### getEchoGeometry

public Shape3D getEchoGeometry()
Gets the `Shape3D` defining the 6DOF sensor's echo geometry and appearance. The returned `Shape3D` allows appearance read and write. If a custom echo was supplied by providing the echo transform group directly then the return value will be `null`.

Returns:
  the echo geometry, or `null` if a custom echo was supplied

### getSensorEventAgent

public SensorEventAgent getSensorEventAgent()
Gets the `SensorEventAgent` used by this behavior. Sensor event generation is delegated to this agent. This can be accessed to manipulate the sensor button and read action bindings directly.

Returns:
  the sensor event agent