gov.nasa.worldwind.render.airspaces

Interface Airspace

All Superinterfaces:

Attributable, AVList, ExtentHolder, Highlightable, Renderable, Restorable

All Known Implementing Classes:

AbstractAirspace, Box, Cake, Cake.Layer, CappedCylinder, CappedEllipticalCylinder, Curtain, ElevationPlane, Orbit, PartialCappedCylinder, PolyArc, Polygon, Route, SphereAirspace, TrackAirspace

public interface Airspace
extends Renderable, Restorable, AVList, ExtentHolder, Highlightable, Attributable

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	DRAW_STYLE_FILL
static java.lang.String	DRAW_STYLE_OUTLINE

Method Summary

Modifier and Type	Method and Description
java.lang.String[]	getAltitudeDatum() Returns the current altitude datum of the airspace's lower and upper surfaces.
double[]	getAltitudes() Returns the current airspace surface altitudes.
AirspaceAttributes	getAttributes() Return the shape's current attributes.
java.lang.Object	getDelegateOwner()
java.lang.Iterable<DetailLevel>	getDetailLevels()
Extent	getExtent(DrawContext dc) Returns this Airspace's enclosing volume as an Extent in model coordinates, given a specified DrawContext.
Extent	getExtent(Globe globe, double verticalExaggeration) Returns this Airspace's enclosing volume as an Extent in model coordinates, given a specified Globe and vertical exaggeration (see SceneController.getVerticalExaggeration().
LatLon	getGroundReference() Returns the current ground reference location.
AirspaceAttributes	getHighlightAttributes() Returns this shape's highlight attributes.
int	getOutlinePickWidth() Indicates the outline line width to use during picking.
boolean	isAirspaceVisible(DrawContext dc) Test if this airspace is visible in the specified draw context.
boolean	isAlwaysOnTop() Indicates the state of this airspace's always-on-top flag.
boolean	isDrawSurfaceShape() Indicates whether this surface shape is always drawn flat and on the surface.
boolean	isEnableBatchPicking() Indicates whether batch picking is enabled.
boolean	isEnableBatchRendering() Indicates whether batch rendering is enabled for the concrete shape type of this shape.
boolean	isEnableDepthOffset() Indicates whether the filled sides of this shape should be offset towards the viewer to help eliminate artifacts when two or more faces of this or other filled shapes are coincident.
boolean	isEnableLevelOfDetail()
boolean[]	isTerrainConforming() Returns the old-style indicators of the airspace's lower and upper surface datums.
boolean	isVisible()
void	setAltitude(double altitude) Sets the lower and upper airspace surface altitudes to the same value.
void	setAltitudeDatum(java.lang.String lowerAltitudeDatum, java.lang.String upperAltitudeDatum) Sets the altitude datum, which indicates whether airspace altitudes are relative to mean sea level, ground level or a single ground reference location.
void	setAltitudes(double lowerAltitude, double upperAltitude) Sets the lower and upper airspace surface altitudes.
void	setAlwaysOnTop(boolean alwaysOnTop) Specifies whether this airspace should have visual priority over other displayed shapes in 3D mode.
void	setAttributes(AirspaceAttributes attributes)
void	setDelegateOwner(java.lang.Object delegateOwner)
void	setDetailLevels(java.util.Collection<DetailLevel> detailLevels)
void	setDrawSurfaceShape(boolean drawSurfaceShape) Specifies whether this airspace should be drawn flat and on the surface, ignoring any altitude information specified in the shape.
void	setEnableBatchPicking(boolean enableBatchPicking) Specifies whether adjacent shapes of this shape's concrete type in the ordered renderable list may be pick-tested together if they are contained in the same layer.
void	setEnableBatchRendering(boolean enableBatchRendering) Specifies whether adjacent shapes of this shape's concrete type in the ordered renderable list may be rendered together if they are contained in the same layer.
void	setEnableDepthOffset(boolean enableDepthOffset) Specifies whether the filled sides of this shape should be offset towards the viewer to help eliminate artifacts when two or more faces of this or other filled shapes are coincident.
void	setEnableLevelOfDetail(boolean enableLevelOfDetail)
void	setGroundReference(LatLon groundReference) Sets the reference location used to determine the elevation offset for airspace surfaces whose altitude datum is AVKey.ABOVE_GROUND_REFERENCE.
void	setHighlightAttributes(AirspaceAttributes highlightAttrs) Specifies this shape's highlight attributes.
void	setOutlinePickWidth(int outlinePickWidth) Specifies the outline line width to use during picking.
void	setTerrainConforming(boolean terrainConformant) Sets the altitude datum for both the lower and upper airspace surface to the same specified value.
void	setTerrainConforming(boolean lowerTerrainConformant, boolean upperTerrainConformant) Sets the altitude datum, which indicates whether airspace altitudes are relative to mean sea level, ground level or a single ground reference location.
void	setVisible(boolean visible)

Methods inherited from interface gov.nasa.worldwind.render.Renderable

render

Methods inherited from interface gov.nasa.worldwind.Restorable

getRestorableState, restoreState

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 gov.nasa.worldwind.render.Highlightable

isHighlighted, setHighlighted

Methods inherited from interface gov.nasa.worldwind.render.Attributable

setAttributes, setHighlightAttributes

Field Detail

DRAW_STYLE_FILL

static final java.lang.String DRAW_STYLE_FILL

See Also:

Constant Field Values

DRAW_STYLE_OUTLINE

static final java.lang.String DRAW_STYLE_OUTLINE

See Also:

Constant Field Values

Method Detail

getAltitudeDatum

java.lang.String[] getAltitudeDatum()

Returns the current altitude datum of the airspace's lower and upper surfaces.

Returns:

a two-element array containing at position 0 the lower altitude datum, and at position 1 the upper altitude datum.

See Also:

setAltitudeDatum(String, String)

getAltitudes

double[] getAltitudes()

Returns the current airspace surface altitudes.

Returns:

a two-element array of double with element 0 containing the lower surface altitude, and element 1 containing the upper surface altitude.

See Also:

setAltitudes(double, double), setAltitudeDatum(java.lang.String, java.lang.String), setGroundReference(gov.nasa.worldwind.geom.LatLon)

getAttributes

AirspaceAttributes getAttributes()

Description copied from interface: Attributable

Return the shape's current attributes.

Specified by:

getAttributes in interface Attributable

Returns:

the shape's current attributes.

getDelegateOwner

java.lang.Object getDelegateOwner()

getDetailLevels

java.lang.Iterable<DetailLevel> getDetailLevels()

getExtent

Extent getExtent(DrawContext dc)

Returns this Airspace's enclosing volume as an Extent in model coordinates, given a specified DrawContext. The returned Extent may be different than the Extent returned by calling getExtent(gov.nasa.worldwind.globes.Globe, double) with the DrawContext's Globe and vertical exaggeration. Additionally, this may cache the computed extent and is therefore potentially faster than calling getExtent(gov.nasa.worldwind.globes.Globe, double).

Parameters:

dc - the current DrawContext.

Returns:

this Airspace's Extent in model coordinates.

Throws:

java.lang.IllegalArgumentException - if the DrawContext is null, or if the Globe held by the DrawContext is null.

getExtent

Extent getExtent(Globe globe,
                 double verticalExaggeration)

Returns this Airspace's enclosing volume as an Extent in model coordinates, given a specified Globe and vertical exaggeration (see SceneController.getVerticalExaggeration().

Specified by:

getExtent in interface ExtentHolder

Parameters:

globe - the Globe this Airspace is related to.

verticalExaggeration - the vertical exaggeration of the scene containing this Airspace.

Returns:

this Airspace's Extent in model coordinates.

Throws:

java.lang.IllegalArgumentException - if the Globe is null.

getGroundReference

LatLon getGroundReference()

Returns the current ground reference location.

Returns:

the current ground reference location.

getHighlightAttributes

AirspaceAttributes getHighlightAttributes()

Returns this shape's highlight attributes.

Specified by:

getHighlightAttributes in interface Attributable

Returns:

this shape's highlight attributes. May be null.

getOutlinePickWidth

int getOutlinePickWidth()

Indicates the outline line width to use during picking. A larger width than normal typically makes the outline easier to pick.

Returns:

the outline line width used during picking.

isAirspaceVisible

boolean isAirspaceVisible(DrawContext dc)

Test if this airspace is visible in the specified draw context. During picking mode, this tests intersection against all of the draw context's pick frustums. During rendering mode, this tests intersection against the draw context's viewing frustum.

Parameters:

dc - the draw context the airspace is related to.

Returns:

true if this airspace is visible; false otherwise.

isAlwaysOnTop

boolean isAlwaysOnTop()

Indicates the state of this airspace's always-on-top flag.

Returns:

the state of this airspace's always-on-top flag.

See Also:

isAlwaysOnTop()

isDrawSurfaceShape

boolean isDrawSurfaceShape()

Indicates whether this surface shape is always drawn flat and on the surface.

Returns:

true if this shape is drawn flat and on the surface, otherwise false.

isEnableBatchPicking

boolean isEnableBatchPicking()

Indicates whether batch picking is enabled.

Returns:

true if batch rendering is enabled, otherwise false.

See Also:

setEnableBatchPicking(boolean)

isEnableBatchRendering

boolean isEnableBatchRendering()

Indicates whether batch rendering is enabled for the concrete shape type of this shape.

Returns:

true if batch rendering is enabled, otherwise false.

See Also:

setEnableBatchRendering(boolean)

isEnableDepthOffset

boolean isEnableDepthOffset()

Indicates whether the filled sides of this shape should be offset towards the viewer to help eliminate artifacts when two or more faces of this or other filled shapes are coincident.

Returns:

true if depth offset is applied, otherwise false.

isEnableLevelOfDetail

boolean isEnableLevelOfDetail()

isTerrainConforming

boolean[] isTerrainConforming()

Returns the old-style indicators of the airspace's lower and upper surface datums.

Returns:

the lower and upper surface datums.

isVisible

boolean isVisible()

setAltitude

void setAltitude(double altitude)

Sets the lower and upper airspace surface altitudes to the same value. The lower and upper altitudes are interpreted according to the current altitude datum of the respective surface. See setAltitudeDatum(String, String) for a description of the possible interpretations and the means to specify them.

Parameters:

altitude - the lower surface altitude, in meters.

See Also:

setAltitudes(double, double), setAltitudeDatum(java.lang.String, java.lang.String), setGroundReference(gov.nasa.worldwind.geom.LatLon)

setAltitudeDatum

void setAltitudeDatum(java.lang.String lowerAltitudeDatum,
                      java.lang.String upperAltitudeDatum)

Sets the altitude datum, which indicates whether airspace altitudes are relative to mean sea level, ground level or a single ground reference location.

A value of AVKey.ABOVE_MEAN_SEA_LEVEL, the default for both lower and upper datums, indicates a datum of mean sea level. The respective lower or upper surface of the airspace is drawn at the constant altitude specified by setAltitude(double).

A datum of AVKey.ABOVE_GROUND_LEVEL indicates that each position of the respective airspace surface is offset vertically from the altitude specified to setAltitude(double) by an amount equal to the terrain elevation at that position. For example, if the specified lower altitude is zero, the lower surface lies on and conforms to the terrain. If non-zero, the surface undulates in tandem with the terrain but relative to the specified altitude.

A datum of AVKey.ABOVE_GROUND_REFERENCE combines both of the above datums. It indicates that the respective surface is drawn at the altitude specified to setAltitude(double) but offset vertically by an amount equal to the elevation at a single reference location on the ground. This is useful for displaying surfaces that are "flat" but are positioned relative to the ground. An example is the roof of a building, which maintains a constant altitude even as the base of its building may conform to varying terrain. One method of representing buildings is to specify a lower altitude of 0, a lower altitude datum of AVKey.ABOVE_GROUND_LEVEL, an upper altitude that's the building's height, and an upper altitude datum of AVKey.ABOVE_GROUND_REFERENCE, where the ground reference is a location at the building's base. The reference position is specifed by setGroundReference(LatLon).

Parameters:

lowerAltitudeDatum - the lower altitude datum.

upperAltitudeDatum - the upper altitude datum

Throws:

java.lang.IllegalArgumentException - if either the lower or upper altitude datum is null.

See Also:

setGroundReference(gov.nasa.worldwind.geom.LatLon), setAltitudes(double, double)

setAltitudes

void setAltitudes(double lowerAltitude,
                  double upperAltitude)

Sets the lower and upper airspace surface altitudes. The altitudes are interpreted according to the current altitude datum of the respective surface. See setAltitudeDatum(String, String) for a description of the possible interpretations and the means to specify them.

Parameters:

lowerAltitude - the lower surface altitude, in meters.

upperAltitude - the upper surface altitude, in meters.

See Also:

setAltitudes(double, double), setAltitudeDatum(java.lang.String, java.lang.String), setGroundReference(gov.nasa.worldwind.geom.LatLon)

setAlwaysOnTop

void setAlwaysOnTop(boolean alwaysOnTop)

Specifies whether this airspace should have visual priority over other displayed shapes in 3D mode. If true, this shape is drawn after all others. This property is ignored by Cake airspaces.

Parameters:

alwaysOnTop - if true, this airspace is drawn after all others. Otherwise this airspace is drawn with its normal priority, which is its relative distance to the eye point.

setAttributes

void setAttributes(AirspaceAttributes attributes)

setDelegateOwner

void setDelegateOwner(java.lang.Object delegateOwner)

setDetailLevels

void setDetailLevels(java.util.Collection<DetailLevel> detailLevels)

setDrawSurfaceShape

void setDrawSurfaceShape(boolean drawSurfaceShape)

Specifies whether this airspace should be drawn flat and on the surface, ignoring any altitude information specified in the shape.

Parameters:

drawSurfaceShape - true if this shape is drawn flat and on the surface, otherwise false.

setEnableBatchPicking

void setEnableBatchPicking(boolean enableBatchPicking)

Specifies whether adjacent shapes of this shape's concrete type in the ordered renderable list may be pick-tested together if they are contained in the same layer. This increases performance but allows only the top-most of the polygons to be reported in a SelectEvent even if several of the polygons are at the pick position.

Batch rendering (setEnableBatchRendering(boolean)) must be enabled in order for batch picking to occur.

Parameters:

enableBatchPicking - true to enable batch rendering, otherwise false.

setEnableBatchRendering

void setEnableBatchRendering(boolean enableBatchRendering)

Specifies whether adjacent shapes of this shape's concrete type in the ordered renderable list may be rendered together if they are contained in the same layer. This increases performance. There is seldom a reason to disable it.

Parameters:

enableBatchRendering - true to enable batch rendering, otherwise false.

setEnableDepthOffset

void setEnableDepthOffset(boolean enableDepthOffset)

Specifies whether the filled sides of this shape should be offset towards the viewer to help eliminate artifacts when two or more faces of this or other filled shapes are coincident.

Parameters:

enableDepthOffset - true if depth offset is applied, otherwise false.

setEnableLevelOfDetail

void setEnableLevelOfDetail(boolean enableLevelOfDetail)

setGroundReference

void setGroundReference(LatLon groundReference)

Sets the reference location used to determine the elevation offset for airspace surfaces whose altitude datum is AVKey.ABOVE_GROUND_REFERENCE. The reference location is unused if the altitude datum is a value other than this.

Parameters:

groundReference - the location at which to compute the terrain elevation used to offset an upper or lower airspace surface. The location need not be within the airspace's bounds. If null, an airspace-specific position is chosen from those defining the airspace. See the method descriptions for the individual airspaces to determine the position used.

See Also:

setAltitudeDatum(String, String)

setHighlightAttributes

void setHighlightAttributes(AirspaceAttributes highlightAttrs)

Specifies this shape's highlight attributes.

Parameters:

highlightAttrs - the highlight attributes. May be null, in which case default attributes are used.

setOutlinePickWidth

void setOutlinePickWidth(int outlinePickWidth)

Specifies the outline line width to use during picking. A larger width than normal typically makes the outline easier to pick.

Note that the size of the pick aperture also affects the precision necessary to pick.

Parameters:

outlinePickWidth - the outline pick width. The default is 10.

Throws:

java.lang.IllegalArgumentException - if the width is less than 0.

setTerrainConforming

void setTerrainConforming(boolean terrainConformant)

Sets the altitude datum for both the lower and upper airspace surface to the same specified value. The datum is normally set via setAltitudeDatum(String, String), but this method is provided for backwards compatibility with the means of originally setting the datum. See the argument descriptions for the mapping of the boolean values of this method to the altitude-datum values.

Parameters:

terrainConformant - the altitude datum. See setTerrainConforming(boolean, boolean) for a description of the possible values.

setTerrainConforming

void setTerrainConforming(boolean lowerTerrainConformant,
                          boolean upperTerrainConformant)

Sets the altitude datum, which indicates whether airspace altitudes are relative to mean sea level, ground level or a single ground reference location. The datum is normally set via setAltitudeDatum(String, String), but this method is provided for backwards compatibility with the means of originally setting the datum. See the argument descriptions below for the mapping of the boolean values of this method to the altitude-datum values.

Parameters:

lowerTerrainConformant - the lower altitude datum. A value of true indicates a lower altitude datum of AVKey.ABOVE_GROUND_LEVEL (terrain conforming), a value of false indicates a lower altitude datum of {link AVKey#ABOVE_MEAN_SEA_LEVEL} (not terrain conforming). the terrain-conforming, a value of false indicates that it's not.

upperTerrainConformant - the upper altitude datum. A value of true indicates an upper altitude datum of AVKey.ABOVE_GROUND_LEVEL (terrain conforming), a value of false indicates an upper altitude datum of {link AVKey#ABOVE_MEAN_SEA_LEVEL} (not terrain conforming. the terrain-conforming, a value of false indicates that it's not.

See Also:

setAltitudeDatum(String, String)

setVisible

void setVisible(boolean visible)