gov.nasa.worldwind.examples.analytics
Class AnalyticSurface

java.lang.Object
  gov.nasa.worldwind.examples.analytics.AnalyticSurface

All Implemented Interfaces:

PreRenderable, Renderable

public class AnalyticSurface
extends Object
implements Renderable, PreRenderable

AnalyticSurface represents a connected grid of geographic locations, covering a specified Sector at a specified base altitude in meters. The number of grid locations is defined by the AnalyticSurface's dimensions. The default dimensions are (10, 10). Callers specify the dimensions by using one of the constructors accepting width and height, or by invoking setDimensions(int, int). Each grid point has the following set of attributes:

• Scalar value : the grid point's height relative to the surface's base altitude, both in meters
• Color : the grid point's RGBA color components

Callers specify the attributes at each grid point by invoking setValues(Iterable) with an Iterable of AnalyticSurface.GridPointAttributes. Grid points are assigned attributes from this iterable staring at the upper left hand corner, and proceeding in row-first order across the grid. The iterable should contain at least width * height values, where width and height are the AnalyticSurface's grid dimensions. If the caller does not specify any GridPointAttributes, or the caller specified iterable contains too few values, the unassigned grid points are given default attributes: the default scalar value is 0, and the default color is Color.BLACK.

Nested Class Summary

protected static class	AnalyticSurface.AnalyticSurfaceObject
protected static class	AnalyticSurface.ClampToGroundSurface
static interface	AnalyticSurface.GridPointAttributes GridPointAttributes defines the properties associated with a single grid point of an AnalyticSurface.
protected static class	AnalyticSurface.OrderedSurface
protected static class	AnalyticSurface.RenderInfo
protected static class	AnalyticSurface.ShadowSurface

Field Summary

protected double	altitude
protected int	altitudeMode
protected AnalyticSurface.AnalyticSurfaceObject	clampToGroundSurface
protected Layer	clientLayer
protected static double	DEFAULT_ALTITUDE
protected static int	DEFAULT_ALTITUDE_MODE The default altitude mode.
protected static Color	DEFAULT_COLOR
protected static int	DEFAULT_DIMENSION
protected static AnalyticSurface.GridPointAttributes	DEFAULT_GRID_POINT_ATTRIBUTES
protected static double	DEFAULT_VALUE
protected boolean	expired
protected double[]	extremeValues
protected Object	globeStateKey
protected int	height
protected Object	pickObject
protected PickSupport	pickSupport
protected Vec4	referencePoint
protected Position	referencePos
protected long	regenTime
protected static long	RELATIVE_TO_GROUND_REGEN_PERIOD The time period between surface regeneration when altitude mode is relative-to-ground.
protected Sector	sector
protected AnalyticSurface.AnalyticSurfaceObject	shadowSurface
protected AnalyticSurfaceAttributes	surfaceAttributes
protected AnalyticSurface.RenderInfo	surfaceRenderInfo
protected boolean	updateFailed
protected Iterable<? extends AnalyticSurface.GridPointAttributes>	values
protected double	verticalScale
protected boolean	visible
protected int	width

Constructor Summary

AnalyticSurface()
Constructs a new AnalyticSurface with the default Sector Sector.EMPTY_SECTOR, the default altitude of 0 meters, default dimensions of (10, 10), and default AnalyticSurface.GridPointAttributes.

AnalyticSurface(int width, int height)
Constructs a new AnalyticSurface with the specified grid dimensions.

AnalyticSurface(Sector sector, double altitude)
Constructs a new AnalyticSurface with the specified Sector and base altitude in meters.

AnalyticSurface(Sector sector, double altitude, int width, int height)
Constructs a new AnalyticSurface with the specified Sector, base altitude in meters, and grid dimensions.

AnalyticSurface(Sector sector, double altitude, int width, int height, Iterable<? extends AnalyticSurface.GridPointAttributes> iterable)
Constructs a new AnalyticSurface with the specified Sector, base altitude in meters, grid dimensions, and iterable of GridPointAttributes.

Method Summary

protected void	beginDrawing(DrawContext dc)
protected void	bind(DrawContext dc)
static double[]	computeExtremeValues(Iterable<? extends AnalyticSurface.GridPointAttributes> iterable) Returns the minimum and maximum values in the specified iterable of AnalyticSurface.GridPointAttributes.
static double[]	computeExtremeValues(Iterable<? extends AnalyticSurface.GridPointAttributes> iterable, double missingDataSignal) Returns the minimum and maximum values in the specified iterable of AnalyticSurface.GridPointAttributes.
protected Vec4	computeSurfacePoint(DrawContext dc, Angle lat, Angle lon, double value)
protected AnalyticSurface.AnalyticSurfaceObject	createClampToGroundSurface()
static AnalyticSurface.GridPointAttributes	createColorGradientAttributes(double value, double minValue, double maxValue, double minHue, double maxHue) Returns a new instance of AnalyticSurface.GridPointAttributes with a Color computed from the specified value and value range.
static Iterable<? extends AnalyticSurface.GridPointAttributes>	createColorGradientValues(BufferWrapper values, double missingDataSignal, double minValue, double maxValue, double minHue, double maxHue) Returns a new iterable populated with AnalyticSurface.GridPointAttributes computed by invoking createColorGradientAttributes(double, double, double, double, double) for each double value in the speicfied BufferWrapper.
static Iterable<? extends AnalyticSurface.GridPointAttributes>	createDefaultValues(int count) Returns a new iterable populated with the default AnalyticSurface.GridPointAttributes.
static AnalyticSurface.GridPointAttributes	createGridPointAttributes(double value, Color color) Returns a new instance of AnalyticSurface.GridPointAttributes with the specified value and color.
protected AnalyticSurface.AnalyticSurfaceObject	createShadowSurface()
protected void	doDrawOrderedRenderable(DrawContext dc)
protected void	doUpdate(DrawContext dc)
protected void	drawInterior(DrawContext dc)
protected void	drawOrderedRenderable(DrawContext dc)
protected void	drawOutline(DrawContext dc)
protected void	drawSurfaceObjects(DrawContext dc)
protected void	endDrawing(DrawContext dc)
double	getAltitude() Returns this surface's base altitude, in meters.
int	getAltitudeMode() Returns the surface's altitude mode, one of WorldWind.CLAMP_TO_GROUND, WorldWind.RELATIVE_TO_GROUND, or WorldWind.ABSOLUTE.
Layer	getClientLayer() Returns the layer associated with this surface during picking.
int[]	getDimensions() Returns the number of horizontal and vertical points composing this surface as an array with two values.
Extent	getExtent(DrawContext dc) Returns this surface's extent in model coordinates.
Object	getPickObject() Returns the object which is associated with this surface during picking.
Sector	getSector() Returns the Sector defining the geographic boundary of this surface.
AnalyticSurfaceAttributes	getSurfaceAttributes() Returns a copy of the rendering attributes associated with this surface.
Iterable<? extends AnalyticSurface.GridPointAttributes>	getValues() Returns the surface's iterable of AnalyticSurface.GridPointAttributes.
double	getVerticalScale() Returns the scale applied to the value at each grid point.
protected boolean	intersectsFrustum(DrawContext dc) Test if this AnalyticSurface intersects the specified draw context's frustum.
protected boolean	isExpired(DrawContext dc)
boolean	isVisible() Returns true if the surface is visible in the scene, and false otherwise.
protected void	makeOrderedRenderable(DrawContext dc)
void	preRender(DrawContext dc)
protected void	preRenderSurfaceObjects(DrawContext dc)
void	render(DrawContext dc) Causes this Renderable to render itself using the provided draw context.
void	setAltitude(double altitude) Sets this surface's base altitude, in meters.
void	setAltitudeMode(int altitudeMode) Specifies the surface's altitude mode, one of WorldWind.CLAMP_TO_GROUND, WorldWind.RELATIVE_TO_GROUND, or WorldWind.ABSOLUTE.
void	setClientLayer(Layer layer) Sets the layer associated with this surface during picking.
void	setDimensions(int width, int height) Sets the number of horizontal and vertical points composing this surface.
protected void	setExpired(boolean expired)
void	setPickObject(Object pickObject) Sets the object associated with this surface during picking.
void	setSector(Sector sector) Sets this surface's geographic boundary, as a Sector.
void	setSurfaceAttributes(AnalyticSurfaceAttributes attributes) Sets the rendering attributes associated with this surface.
void	setValues(Iterable<? extends AnalyticSurface.GridPointAttributes> iterable) Sets this surface's iterable of AnalyticSurface.GridPointAttributes.
void	setVerticalScale(double scale) Sets the scale applied to the value at each grid point.
void	setVisible(boolean visible) Sets whether or not the surface is visible in the scene.
protected void	update(DrawContext dc)
protected void	updateNextSurfacePoint(DrawContext dc, Angle lat, Angle lon, AnalyticSurface.GridPointAttributes attr, AnalyticSurface.RenderInfo outRenderInfo)
protected void	updateSurfaceNormals(AnalyticSurface.RenderInfo outRenderInfo)
protected void	updateSurfacePoints(DrawContext dc, AnalyticSurface.RenderInfo outRenderInfo)

Methods inherited from class java.lang.Object

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

Field Detail

altitude

protected double altitude

altitudeMode

protected int altitudeMode

clampToGroundSurface

protected AnalyticSurface.AnalyticSurfaceObject clampToGroundSurface

clientLayer

protected Layer clientLayer

DEFAULT_ALTITUDE

protected static final double DEFAULT_ALTITUDE

See Also:

Constant Field Values

DEFAULT_ALTITUDE_MODE

protected static final int DEFAULT_ALTITUDE_MODE

The default altitude mode.

See Also:

Constant Field Values

DEFAULT_COLOR

protected static final Color DEFAULT_COLOR

DEFAULT_DIMENSION

protected static final int DEFAULT_DIMENSION

See Also:

Constant Field Values

DEFAULT_GRID_POINT_ATTRIBUTES

protected static final AnalyticSurface.GridPointAttributes DEFAULT_GRID_POINT_ATTRIBUTES

DEFAULT_VALUE

protected static final double DEFAULT_VALUE

See Also:

Constant Field Values

expired

protected boolean expired

extremeValues

protected double[] extremeValues

globeStateKey

protected Object globeStateKey

height

protected int height

pickObject

protected Object pickObject

pickSupport

protected final PickSupport pickSupport

referencePoint

protected Vec4 referencePoint

referencePos

protected Position referencePos

regenTime

protected long regenTime

RELATIVE_TO_GROUND_REGEN_PERIOD

protected static final long RELATIVE_TO_GROUND_REGEN_PERIOD

The time period between surface regeneration when altitude mode is relative-to-ground.

See Also:

Constant Field Values

sector

protected Sector sector

shadowSurface

protected AnalyticSurface.AnalyticSurfaceObject shadowSurface

surfaceAttributes

protected AnalyticSurfaceAttributes surfaceAttributes

surfaceRenderInfo

protected AnalyticSurface.RenderInfo surfaceRenderInfo

updateFailed

protected boolean updateFailed

values

protected Iterable<? extends AnalyticSurface.GridPointAttributes> values

verticalScale

protected double verticalScale

visible

protected boolean visible

width

protected int width

Constructor Detail

AnalyticSurface

public AnalyticSurface()

Constructs a new AnalyticSurface with the default Sector Sector.EMPTY_SECTOR, the default altitude of 0 meters, default dimensions of (10, 10), and default AnalyticSurface.GridPointAttributes.

AnalyticSurface

public AnalyticSurface(int width,
                       int height)

Constructs a new AnalyticSurface with the specified grid dimensions. The new AnalyticSurface is has the default Sector Sector.EMPTY_SECTOR, the default altitude of 0 meters, and default AnalyticSurface.GridPointAttributes.

Parameters:

width - the surface grid width, in number of grid points.

height - the surface grid height, in number of grid points.

Throws:

IllegalArgumentException - if the sector is null.

AnalyticSurface

public AnalyticSurface(Sector sector,
                       double altitude)

Constructs a new AnalyticSurface with the specified Sector and base altitude in meters. The new AnalyticSurface has default dimensions of (10, 10), and default AnalyticSurface.GridPointAttributes.

Parameters:

sector - the Sector which defines the surface's geographic region.

altitude - the base altitude to place the surface at, in meters.

Throws:

IllegalArgumentException - if the sector is null.

AnalyticSurface

public AnalyticSurface(Sector sector,
                       double altitude,
                       int width,
                       int height)

Constructs a new AnalyticSurface with the specified Sector, base altitude in meters, and grid dimensions. The new AnalyticSurface has the default AnalyticSurface.GridPointAttributes.

Parameters:

sector - the Sector which defines the surface's geographic region.

altitude - the base altitude to place the surface at, in meters.

width - the surface grid width, in number of grid points.

height - the surface grid height, in number of grid points.

Throws:

IllegalArgumentException - if the sector is null, if the width is less than 1, or if the height is less than 1.

AnalyticSurface

public AnalyticSurface(Sector sector,
                       double altitude,
                       int width,
                       int height,
                       Iterable<? extends AnalyticSurface.GridPointAttributes> iterable)

Constructs a new AnalyticSurface with the specified Sector, base altitude in meters, grid dimensions, and iterable of GridPointAttributes. The iterable should contain at least with * height non-null GridPointAttributes.

Parameters:

sector - the Sector which defines the surface's geographic region.

altitude - the base altitude to place the surface at, in meters.

width - the surface grid width, in number of grid points.

height - the surface grid height, in number of grid points.

iterable - the attributes associated with each grid point.

Throws:

IllegalArgumentException - if the sector is null, if the width is less than 1, if the height is less than 1, or if the iterable is null.

Method Detail

beginDrawing

protected void beginDrawing(DrawContext dc)

bind

protected void bind(DrawContext dc)

computeExtremeValues

public static double[] computeExtremeValues(Iterable<? extends AnalyticSurface.GridPointAttributes> iterable)

Returns the minimum and maximum values in the specified iterable of AnalyticSurface.GridPointAttributes. Values equivalent to Double.NaN are ignored. This returns null if the buffer is empty or contains only NaN values.

Parameters:

iterable - the GridPointAttributes to search for the minimum and maximum value.

Returns:

an array containing the minimum value in index 0 and the maximum value in index 1, or null if the iterable is empty or contains only NaN values.

Throws:

IllegalArgumentException - if the iterable is null.

computeExtremeValues

public static double[] computeExtremeValues(Iterable<? extends AnalyticSurface.GridPointAttributes> iterable,
                                            double missingDataSignal)

Returns the minimum and maximum values in the specified iterable of AnalyticSurface.GridPointAttributes. Values equivalent to the specified missingDataSignal are ignored. This returns null if the iterable is empty or contains only missing values.

Parameters:

iterable - the GridPointAttributes to search for the minimum and maximum value.

missingDataSignal - the number indicating a specific value to ignore.

Returns:

an array containing the minimum value in index 0 and the maximum value in index 1, or null if the iterable is empty or contains only missing values.

Throws:

IllegalArgumentException - if the iterable is null.

computeSurfacePoint

protected Vec4 computeSurfacePoint(DrawContext dc,
                                   Angle lat,
                                   Angle lon,
                                   double value)

createClampToGroundSurface

protected AnalyticSurface.AnalyticSurfaceObject createClampToGroundSurface()

createColorGradientAttributes

public static AnalyticSurface.GridPointAttributes createColorGradientAttributes(double value,
                                                                                double minValue,
                                                                                double maxValue,
                                                                                double minHue,
                                                                                double maxHue)

Returns a new instance of AnalyticSurface.GridPointAttributes with a Color computed from the specified value and value range. The color's RGB components are computed by mapping value's relative position in the range [minValue, maxValue] to the range of color hues [minHue, maxHue]. The color's Alpha component is computed by mapping the values's relative position in the range [minValue, minValue + (maxValue - minValue) / 10] to the range [0, 1]. This has the effect of interpolating hue and alpha based on the grid point value.

Parameters:

value - the new GridPointAttributes' value.

minValue - the minimum value.

maxValue - the maximum value.

minHue - the mimimum color hue, corresponding to the minimum value.

maxHue - the maximum color hue, corresponding to the maximum value.

Returns:

a new GridPointAttributes defined by the specified value, value range, and color hue range.

createColorGradientValues

public static Iterable<? extends AnalyticSurface.GridPointAttributes> createColorGradientValues(BufferWrapper values,
                                                                                                double missingDataSignal,
                                                                                                double minValue,
                                                                                                double maxValue,
                                                                                                double minHue,
                                                                                                double maxHue)

Returns a new iterable populated with AnalyticSurface.GridPointAttributes computed by invoking createColorGradientAttributes(double, double, double, double, double) for each double value in the speicfied BufferWrapper. Values equivalent to the specified missingDataSignal are replaced with the specified minValue.

Parameters:

values - the buffer of values.

missingDataSignal - the number indicating a specific value to ignore.

minValue - the minimum value.

maxValue - the maximum value.

minHue - the mimimum color hue, corresponding to the minimum value.

maxHue - the maximum color hue, corresponding to the maximum value.

Returns:

an iiterable GridPointAttributes defined by the specified buffer of values.

createDefaultValues

public static Iterable<? extends AnalyticSurface.GridPointAttributes> createDefaultValues(int count)

Returns a new iterable populated with the default AnalyticSurface.GridPointAttributes. The default GridPointAttributes have a value of 0, and the color Color.BLACK.

Parameters:

count - the desired number of GridPointAttributes to return.

Returns:

an iterable containing count default GridPointAttributes.

createGridPointAttributes

public static AnalyticSurface.GridPointAttributes createGridPointAttributes(double value,
                                                                            Color color)

Returns a new instance of AnalyticSurface.GridPointAttributes with the specified value and color.

Parameters:

value - the new GridPointAttributes' value.

color - the new GridPointAttributes' color.

Returns:

a new GridPointAttributes defined by the specified value and color.

createShadowSurface

protected AnalyticSurface.AnalyticSurfaceObject createShadowSurface()

doDrawOrderedRenderable

protected void doDrawOrderedRenderable(DrawContext dc)

doUpdate

protected void doUpdate(DrawContext dc)

drawInterior

protected void drawInterior(DrawContext dc)

drawOrderedRenderable

protected void drawOrderedRenderable(DrawContext dc)

drawOutline

protected void drawOutline(DrawContext dc)

drawSurfaceObjects

protected void drawSurfaceObjects(DrawContext dc)

endDrawing

protected void endDrawing(DrawContext dc)

getAltitude

public double getAltitude()

Returns this surface's base altitude, in meters.

Returns:

this surface's base altitude, in meters.

getAltitudeMode

public int getAltitudeMode()

Returns the surface's altitude mode, one of WorldWind.CLAMP_TO_GROUND, WorldWind.RELATIVE_TO_GROUND, or WorldWind.ABSOLUTE. The altitude mode WorldWind.CONSTANT is not supported and WorldWind.ABSOLUTE is used if specified.

Returns:

the surface's altitude mode.

getClientLayer

public Layer getClientLayer()

Returns the layer associated with this surface during picking.

Returns:

this surface's pick layer.

getDimensions

public int[] getDimensions()

Returns the number of horizontal and vertical points composing this surface as an array with two values. The value at index 0 indicates the grid width, and the value at index 1 indicates the grid height.

Returns:

the dimensions of this surface's grid.

getExtent

public Extent getExtent(DrawContext dc)

Returns this surface's extent in model coordinates.

Parameters:

dc - the current DrawContext.

Returns:

this surface's extent in the specified DrawContext.

Throws:

IllegalArgumentException - if the DrawContext is null.

getPickObject

public Object getPickObject()

Returns the object which is associated with this surface during picking. A null value is permitted and indicates that the surface itself will be the object returned during picking.

Returns:

this surface's pick object.

getSector

public Sector getSector()

Returns the Sector defining the geographic boundary of this surface.

Returns:

this surface's geographic boundary, as a Sector.

getSurfaceAttributes

public AnalyticSurfaceAttributes getSurfaceAttributes()

Returns a copy of the rendering attributes associated with this surface. Modifying the contents of the returned reference has no effect on this surface. In order to make an attribute change take effect, invoke setSurfaceAttributes(AnalyticSurfaceAttributes) with the modified attributes.

Returns:

a copy of this surface's rendering attributes.

getValues

public Iterable<? extends AnalyticSurface.GridPointAttributes> getValues()

Returns the surface's iterable of AnalyticSurface.GridPointAttributes. See setValues(Iterable) for details on how this iterable is interpreted by AnalyticSurface.

Returns:

this surface's GridPointAttributes.

getVerticalScale

public double getVerticalScale()

Returns the scale applied to the value at each grid point.

Returns:

the surface's vertical scale coefficient.

intersectsFrustum

protected boolean intersectsFrustum(DrawContext dc)

Test if this AnalyticSurface intersects the specified draw context's frustum. 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 current draw context.

Returns:

true if this AnalyticSurface intersects the draw context's frustum; false otherwise.

isExpired

protected boolean isExpired(DrawContext dc)

isVisible

public boolean isVisible()

Returns true if the surface is visible in the scene, and false otherwise.

Returns:

true if the surface is visible in the scene, and false otherwise

makeOrderedRenderable

protected void makeOrderedRenderable(DrawContext dc)

preRender

public void preRender(DrawContext dc)

Specified by:

preRender in interface PreRenderable

Parameters:

dc -

preRenderSurfaceObjects

protected void preRenderSurfaceObjects(DrawContext dc)

render

public void render(DrawContext dc)

Causes this Renderable to render itself using the provided draw context.

Specified by:

render in interface Renderable

Parameters:

dc - the DrawContext to be used

See Also:

DrawContext

setAltitude

public void setAltitude(double altitude)

Sets this surface's base altitude, in meters.

Parameters:

altitude - the new base altitude, in meters.

setAltitudeMode

public void setAltitudeMode(int altitudeMode)

Specifies the surface's altitude mode, one of WorldWind.CLAMP_TO_GROUND, WorldWind.RELATIVE_TO_GROUND, or WorldWind.ABSOLUTE. The altitude mode WorldWind.CONSTANT is not supported and WorldWind.ABSOLUTE is used if specified.

Parameters:

altitudeMode - the surface's altitude mode.

setClientLayer

public void setClientLayer(Layer layer)

Sets the layer associated with this surface during picking. A null value is permitted, and indicates that no layer is associated with this surface.

Parameters:

layer - this surface's pick layer.

setDimensions

public void setDimensions(int width,
                          int height)

Sets the number of horizontal and vertical points composing this surface.

Parameters:

width - the new grid width.

height - the new grid height.

Throws:

IllegalArgumentException - if either width or heigth are less than 1.

setExpired

protected void setExpired(boolean expired)

setPickObject

public void setPickObject(Object pickObject)

Sets the object associated with this surface during picking. A null value is permitted and indicates that the surface itself will be the object returned during picking.

Parameters:

pickObject - the object to associated with this surface during picking. A null value is permitted and indicates that the surface itself will be the object returned during picking.

setSector

public void setSector(Sector sector)

Sets this surface's geographic boundary, as a Sector.

Parameters:

sector - this surface's new geographic boundary, as a Sector.

Throws:

IllegalArgumentException - if the surface is null.

setSurfaceAttributes

public void setSurfaceAttributes(AnalyticSurfaceAttributes attributes)

Sets the rendering attributes associated with this surface. The caller cannot assume that modifying the attribute reference after calling setSurfaceAttributes() will have any effect, as the implementation may defensively copy the attribute reference. In order to make an attribute change take effect, invoke setSurfaceAttributes(AnalyticSurfaceAttributes) again with the modified attributes.

Parameters:

attributes - this surface's new rendering attributes.

Throws:

IllegalArgumentException - if attributes is null.

setValues

public void setValues(Iterable<? extends AnalyticSurface.GridPointAttributes> iterable)

Sets this surface's iterable of AnalyticSurface.GridPointAttributes. Grid points are assigned attributes from this iterable staring at the upper left hand corner, and proceeding in row-first order across the grid. The iterable should contain at least width * height values, where width and height are the AnalyticSurface's grid dimensions. If the iterable contains too few values, the unassigned grid points are given default attributes: the default scalar value is 0, and the default color is Color.BLACK. (totally opaque).

Parameters:

iterable - the new grid point attributes.

Throws:

IllegalArgumentException - if the iterable is null.

setVerticalScale

public void setVerticalScale(double scale)

Sets the scale applied to the value at each grid point. Before rendering, this value is applied to each grid points scalar value, thus increasing or decreasing it's height relative to the surface's base altitude, both in meters.

Parameters:

scale - the surface's vertical scale coefficient.

setVisible

public void setVisible(boolean visible)

Sets whether or not the surface is visible in the scene.

Parameters:

visible - true to make the surface visible, and false to make it hidden.

update

protected void update(DrawContext dc)

updateNextSurfacePoint

protected void updateNextSurfacePoint(DrawContext dc,
                                      Angle lat,
                                      Angle lon,
                                      AnalyticSurface.GridPointAttributes attr,
                                      AnalyticSurface.RenderInfo outRenderInfo)

updateSurfaceNormals

protected void updateSurfaceNormals(AnalyticSurface.RenderInfo outRenderInfo)

updateSurfacePoints

protected void updateSurfacePoints(DrawContext dc,
                                   AnalyticSurface.RenderInfo outRenderInfo)