gov.nasa.worldwind

Class StereoOptionSceneController

java.lang.Object

gov.nasa.worldwind.avlist.AVListImpl

gov.nasa.worldwind.WWObjectImpl

gov.nasa.worldwind.AbstractSceneController

gov.nasa.worldwind.BasicSceneController

gov.nasa.worldwind.StereoOptionSceneController

All Implemented Interfaces:

AVList, Disposable, MessageListener, SceneController, StereoSceneController, WWObject, PropertyChangeListener, EventListener

public class StereoOptionSceneController
extends BasicSceneController
implements StereoSceneController

TODO: This file needs to be updated to implement "correct" stereo, as described at: http://www.orthostereo.com/geometryopengl.html

This scene controller draws in stereo, either red-blue anaglyph or device supported if the display device provides stereo directly. It can also draw without applying stereo. To select stereo, prior to calling this class' constructor set the Java VM property gov.nasa.worldwind.stereo.mode to "device" for device supported stereo (if provided by the device) or "redblue" for red-blue anaglyph stereo. If the property is not set or is any other value, this class does not draw in stereo.

The WorldWindow instance must support stereo in order to use device-supported stereo. A stereo WorldWindow is selected by specifying the Java VM property described above prior to creating it. See WorldWindowGLCanvas for further details.

Note: The logic and much of the code here was contributed by Xander Enzmann of Mitre Corporation.

Field Summary

Fields

Modifier and Type	Field and Description
protected GLCapabilitiesImmutable	capabilities Indicates the GL drawable capabilities.
protected static double	DEFAULT_FOCUS_ANGLE The default focus angle.
protected Angle	focusAngle The angle between eyes.
protected boolean	hardwareStereo Indicates whether hardware device stereo is available.
protected boolean	inStereo Indicates whether stereo is being applied, either because a stereo device is being used or a stereo mode is in effect.
protected String	stereoMode The current stereo mode.
protected boolean	swapEyes Indicates whether left and right eye positions are swapped.

Fields inherited from class gov.nasa.worldwind.AbstractSceneController

clutterFilter, dc, deepPick, deferOrderedRendering, frame, framesPerSecond, frameTime, glRuntimeCaps, gpuResourceCache, lastObjectsInPickRect, lastPickedObjects, model, perFrameStatistics, perFrameStatisticsKeys, pickableObjects, pickPoint, pickPoints, pickRect, pickTime, renderingExceptions, screenCreditController, SURFACE_OBJECT_TILE_COUNT_NAME, surfaceObjectTileBuilder, textRendererCache, timebase, verticalExaggeration, view

Constructor Summary

Constructors

Constructor and Description
StereoOptionSceneController() Constructs an instance and initializes its stereo mode to

Method Summary

Modifier and Type	Method and Description
protected void	doDrawStereoNone(DrawContext dc) Implement no stereo ("Mono") while using a stereo device.
protected void	doDrawStereoRedBlue(DrawContext dc) Implement stereo using the red-blue anaglyph technique.
protected void	doDrawToStereoDevice(DrawContext dc) Implement stereo using the stereo-enabled graphics device.
protected void	draw(DrawContext dc)
Angle	getFocusAngle() Returns this controller's focus angle, the angle difference between the left and right eye direction.
String	getStereoMode() Indicates the current stereo mode of this controller.
boolean	isHardwareStereo() Indicates whether stereo is being implemented directly by the display device rather than software.
boolean	isInStereo() Indicates whether stereo is being applied, either directly by the display device or simulated via software.
boolean	isSwapEyes() Indicates whether to switch the left/right stereo images.
void	setFocusAngle(Angle a) Specifies the angle difference between the left and right eye direction.
void	setStereoMode(String mode) Specifies the technique used to provide a stereo effect.
void	setSwapEyes(boolean swapEyes) Specifies whether to draw the right eye image in the left eye's position and the left eye's image in the right eye's position.

Methods inherited from class gov.nasa.worldwind.BasicSceneController

createTerrain2DContinuous, do2DContiguousRepaint, doNormalRepaint, doRepaint, draw2DContiguous, makeCurrent, pick2DContiguous, preRender2DContiguous

Methods inherited from class gov.nasa.worldwind.AbstractSceneController

applyView, buildCompositeSurfaceObjects, checkGLErrors, clearFrame, createPickFrustum, createTerrain, dispose, doDeepPick, doNonTerrainPick, doResolveTopPick, doResolveTopPick, drawCompositeSurfaceObjects, drawOrderedSurfaceRenderables, finalizeFrame, getClutterFilter, getDrawContext, getFramesPerSecond, getFrameTime, getGLRuntimeCapabilities, getGpuResourceCache, getModel, getObjectsInPickRectangle, getPerFrameStatistics, getPickedObjectList, getPickPoint, getPickRectangle, getRenderingExceptions, getScreenCreditController, getTerrain, getTextRendererCache, getVerticalExaggeration, getView, getViewportCenter, initializeDrawContext, initializeFrame, isDeepPickEnabled, isDeferOrderedRendering, mergePickedObjectLists, pick, pickLayers, pickOrderedSurfaceRenderables, pickTerrain, preRender, preRenderOrderedSurfaceRenderables, reinitialize, repaint, resolveTopPick, setClutterFilter, setDeepPickEnabled, setDeferOrderedRendering, setGLRuntimeCapabilities, setGpuResourceCache, setModel, setPerFrameStatisticsKeys, setPickedObjectList, setPickPoint, setPickRectangle, setScreenCreditController, setVerticalExaggeration, setView

Methods inherited from class gov.nasa.worldwind.WWObjectImpl

onMessage, propertyChange

Methods inherited from class gov.nasa.worldwind.avlist.AVListImpl

addPropertyChangeListener, addPropertyChangeListener, clearList, copy, firePropertyChange, firePropertyChange, getBooleanValue, getBooleanValue, getChangeSupport, getDoubleValue, getDoubleValue, getEntries, getIntegerValue, getIntegerValue, getLongValue, getLongValue, getRestorableStateForAVPair, getStringValue, getStringValue, getStringValue, getValue, getValues, hasKey, removeKey, removePropertyChangeListener, removePropertyChangeListener, setValue, setValues

Methods inherited from class java.lang.Object

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

Methods inherited from interface gov.nasa.worldwind.SceneController

getClutterFilter, getDrawContext, getFramesPerSecond, getFrameTime, getGLRuntimeCapabilities, getGpuResourceCache, getModel, getObjectsInPickRectangle, getPerFrameStatistics, getPickedObjectList, getPickPoint, getPickRectangle, getRenderingExceptions, getScreenCreditController, getTerrain, getVerticalExaggeration, getView, isDeepPickEnabled, reinitialize, repaint, setClutterFilter, setDeepPickEnabled, setGLRuntimeCapabilities, setGpuResourceCache, setModel, setPerFrameStatisticsKeys, setPickPoint, setPickRectangle, setScreenCreditController, setVerticalExaggeration, setView

Methods inherited from interface gov.nasa.worldwind.avlist.AVList

addPropertyChangeListener, addPropertyChangeListener, clearList, copy, firePropertyChange, firePropertyChange, getEntries, getStringValue, getValue, getValues, hasKey, removeKey, removePropertyChangeListener, removePropertyChangeListener, setValue, setValues

Methods inherited from interface java.beans.PropertyChangeListener

propertyChange

Methods inherited from interface gov.nasa.worldwind.event.MessageListener

onMessage

Methods inherited from interface gov.nasa.worldwind.Disposable

dispose

Field Detail

capabilities

protected GLCapabilitiesImmutable capabilities

Indicates the GL drawable capabilities. Non-null only after this scene controller draws once.

DEFAULT_FOCUS_ANGLE

protected static final double DEFAULT_FOCUS_ANGLE

The default focus angle. May be specified in the World Wind configuration file as the gov.nasa.worldwind.StereoFocusAngle property. The default if not specified in the configuration is 1.6 degrees.

focusAngle

protected Angle focusAngle

The angle between eyes. Larger angles give increased 3D effect.

hardwareStereo

protected boolean hardwareStereo

Indicates whether hardware device stereo is available. Valid only after this scene controller draws once.

inStereo

protected boolean inStereo

Indicates whether stereo is being applied, either because a stereo device is being used or a stereo mode is in effect. This field is included because the question is asked every frame, and tracking the answer via a boolean avoids the overhead of more complicated logic that determines the stereo-drawing implementation to call.

stereoMode

protected String stereoMode

The current stereo mode. May not be set to null; use AVKey.STEREO_MODE_NONE instead.

swapEyes

protected boolean swapEyes

Indicates whether left and right eye positions are swapped.

Constructor Detail

StereoOptionSceneController

public StereoOptionSceneController()

Constructs an instance and initializes its stereo mode to

Method Detail

doDrawStereoNone

protected void doDrawStereoNone(DrawContext dc)

Implement no stereo ("Mono") while using a stereo device.

Note that this method draws the image twice, once to each of the left and right eye buffers, even when stereo is not in effect. This is to prevent the stereo device from drawing blurred scenes.

Parameters:

dc - the current draw context.

doDrawStereoRedBlue

protected void doDrawStereoRedBlue(DrawContext dc)

Implement stereo using the red-blue anaglyph technique.

Parameters:

dc - the current draw context.

doDrawToStereoDevice

protected void doDrawToStereoDevice(DrawContext dc)

Implement stereo using the stereo-enabled graphics device. The mode has an effect only if the display device implements stereo.

Parameters:

dc - the current draw context.

draw

protected void draw(DrawContext dc)

Overrides:

draw in class AbstractSceneController

getFocusAngle

public Angle getFocusAngle()

Description copied from interface: StereoSceneController

Returns this controller's focus angle, the angle difference between the left and right eye direction.

Specified by:

getFocusAngle in interface StereoSceneController

Returns:

this controller's focus angle.

getStereoMode

public String getStereoMode()

Description copied from interface: StereoSceneController

Indicates the current stereo mode of this controller.

Specified by:

getStereoMode in interface StereoSceneController

Returns:

the current stereo mode. See this class' description for the possible modes. This method does not return null. If a null mode was passed to StereoSceneController.setStereoMode(String), this instance's mode was set to AVKey.STEREO_MODE_NONE.

isHardwareStereo

public boolean isHardwareStereo()

Description copied from interface: StereoSceneController

Indicates whether stereo is being implemented directly by the display device rather than software.

Specified by:

isHardwareStereo in interface StereoSceneController

Returns:

true if if stereo is being implemented by the display device, otherwise false.

isInStereo

public boolean isInStereo()

Indicates whether stereo is being applied, either directly by the display device or simulated via software.

If the display device is providing stereo -- isHardwareStereo() is true -- this method returns true even if the stereo mode is AVKey.STEREO_MODE_NONE. In this case, individual stereo images are drawn for left and right eyes in order to prevent a blurred scene.

Specified by:

isInStereo in interface StereoSceneController

Returns:

true if stereo is being applied.

isSwapEyes

public boolean isSwapEyes()

Description copied from interface: StereoSceneController

Indicates whether to switch the left/right stereo images.

Specified by:

isSwapEyes in interface StereoSceneController

Returns:

true to switch the images, otherwise false

setFocusAngle

public void setFocusAngle(Angle a)

Specifies the angle difference between the left and right eye direction. Larger angles increase the stereo effect. The default focus angle is 1.6 degrees.

Specified by:

setFocusAngle in interface StereoSceneController

Parameters:

a - the left-right eye direction difference. If null, the angle is set to 0.

setStereoMode

public void setStereoMode(String mode)

Description copied from interface: StereoSceneController

Specifies the technique used to provide a stereo effect. Defined options are AVKey.STEREO_MODE_DEVICE to request device supported stereo, AVKey.STEREO_MODE_RED_BLUE to request red-blue anaglyph stereo implemented in software, or AVKey.STEREO_MODE_NONE (the default) to request no stereo effect.

If STEREO_MODE_DEVICE is requested but the display device does not support stereo, stereo is not applied.

See the implementing class to determine how it detects the initial stereo mode.

Specified by:

setStereoMode in interface StereoSceneController

Parameters:

mode - the technique used to provide the stereo effect. If null, the mode is set to AVKey.STEREO_MODE_NONE.

setSwapEyes

public void setSwapEyes(boolean swapEyes)

Description copied from interface: StereoSceneController

Specifies whether to draw the right eye image in the left eye's position and the left eye's image in the right eye's position.

Specified by:

setSwapEyes in interface StereoSceneController

Parameters:

swapEyes - true to switch the left/right stereo images, otherwise false.