gov.nasa.worldwind.render

Class DeclutteringTextRenderer

java.lang.Object

gov.nasa.worldwind.render.DeclutteringTextRenderer

public class DeclutteringTextRenderer
extends Object

A simplified version of GeographicTextRenderer that participates in globe text decluttering. See ClutterFilter for more information on decluttering.

Field Summary

Fields

Modifier and Type	Field and Description
protected static Color	DEFAULT_COLOR
protected static Font	DEFAULT_FONT
protected GLU	glu
protected boolean	hasJOGLv111Bug

Constructor Summary

Constructors

Constructor and Description
DeclutteringTextRenderer()

Method Summary

Modifier and Type	Method and Description
protected Color	applyOpacity(Color color, double opacity)
protected void	beginRendering(DrawContext dc)
protected Point2D.Float	computeDrawPoint(Rectangle2D rect, Vec4 screenPoint) Computes the final draw point for the given rectangle lower left corner and target screen point.
protected Rectangle2D	computeTextBounds(DrawContext dc, DeclutterableText text)
protected Vec4	drawText(DrawContext dc, DeclutterableText uText, double scale, double opacity)
protected void	endRendering(DrawContext dc)
Font	getDefaultFont()
TextRenderer	getTextRenderer(DrawContext dc, Font font) Returns either a cached or new text renderer for a specified font.
protected void	handleTextRendererExceptions(Exception e)
protected static boolean	isTextValid(GeographicText text, boolean checkPosition)
void	render(DrawContext dc, Iterable<? extends GeographicText> textIterable) Adds ordered renderables to the ordered renderable list.
protected void	setDepthFunc(DrawContext dc, Vec4 screenPoint)

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_COLOR

protected static final Color DEFAULT_COLOR

DEFAULT_FONT

protected static final Font DEFAULT_FONT

glu

protected final GLU glu

hasJOGLv111Bug

protected boolean hasJOGLv111Bug

Constructor Detail

DeclutteringTextRenderer

public DeclutteringTextRenderer()

Method Detail

applyOpacity

protected Color applyOpacity(Color color,
                             double opacity)

beginRendering

protected void beginRendering(DrawContext dc)

computeDrawPoint

protected Point2D.Float computeDrawPoint(Rectangle2D rect,
                                         Vec4 screenPoint)

Computes the final draw point for the given rectangle lower left corner and target screen point. If the returned point is null the text will not be drawn.

Parameters:

rect - the text rectangle to draw.

screenPoint - the projected screen point the text relates to.

Returns:

the final draw point for the given rectangle lower left corner or null.

computeTextBounds

protected Rectangle2D computeTextBounds(DrawContext dc,
                                        DeclutterableText text)
                                 throws Exception

Throws:

Exception

drawText

protected Vec4 drawText(DrawContext dc,
                        DeclutterableText uText,
                        double scale,
                        double opacity)
                 throws Exception

Throws:

Exception

endRendering

protected void endRendering(DrawContext dc)

getDefaultFont

public Font getDefaultFont()

getTextRenderer

public TextRenderer getTextRenderer(DrawContext dc,
                                    Font font)

Returns either a cached or new text renderer for a specified font.

Parameters:

dc - the current draw context.

font - the text font.

Returns:

a text renderer.

handleTextRendererExceptions

protected void handleTextRendererExceptions(Exception e)
                                     throws Exception

Throws:

Exception

isTextValid

protected static boolean isTextValid(GeographicText text,
                                     boolean checkPosition)

render

public void render(DrawContext dc,
                   Iterable<? extends GeographicText> textIterable)

Adds ordered renderables to the ordered renderable list.

Parameters:

dc - the current draw context.

textIterable - a collection of text shapes to add to the ordered-renderable list.

setDepthFunc

protected void setDepthFunc(DrawContext dc,
                            Vec4 screenPoint)