org.deegree.rendering.r3d.opengl.rendering.model.geometry
Class BillBoard

java.lang.Object
  org.deegree.rendering.r3d.model.QualityModel<RenderableQualityModelPart>
      org.deegree.rendering.r3d.opengl.rendering.model.geometry.RenderableQualityModel
          org.deegree.rendering.r3d.opengl.rendering.model.geometry.BillBoard

All Implemented Interfaces:

Serializable, PositionableModel, MemoryAware, JOGLRenderable

public class BillBoard
extends RenderableQualityModel
implements PositionableModel

The BillBoard class represents a billboard an object always facing the viewer, with the z-axis as it's rotation axis.

Version:

$Revision: 29127 $, $Date: 2011-01-10 16:13:35 +0100 (Mon, 10 Jan 2011) $

Author:

Rutger Bezema, last edited by: $Author: aschmitz $

See Also:

Serialized Form

Field Summary

Fields inherited from class org.deegree.rendering.r3d.model.QualityModel

prototype, qualityModelParts

Constructor Summary

BillBoard(String texture, float[] location, float width, float height)
Constructs a billboard data structure with the given texture id.

Method Summary

boolean	equals(Object obj)
float	getErrorScalar()
float	getGroundLevel()
float	getHeight()
float[]	getLocation()
float[]	getModelBBox()
float	getObjectHeight()
float[]	getPosition()
String	getTextureID()
float	getWidth()
int	hashCode() Implementation as proposed by Joshua Block in Effective Java (Addison-Wesley 2001), which supplies an even distribution and is relatively fast.
void	render(RenderContext glRenderContext) Called to render this object to an OpenGL context.
void	renderPrepared(javax.media.opengl.GL context, float[] eye)
long	sizeOf()
String	toString()

Methods inherited from class org.deegree.rendering.r3d.opengl.rendering.model.geometry.RenderableQualityModel

getOrdinateCount, getTextureOrdinateCount, renderPrepared

Methods inherited from class org.deegree.rendering.r3d.model.QualityModel

addQualityModelPart, addQualityModelParts, getPrototypeReference, getQualityModelPart, getQualityModelParts, setPrototype

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

BillBoard

public BillBoard(String texture,
                 float[] location,
                 float width,
                 float height)

Constructs a billboard data structure with the given texture id.

Parameters:

texture -

location - of the billboard

width - of this billboard

height - of this billboard

Method Detail

render

public void render(RenderContext glRenderContext)

Description copied from interface: JOGLRenderable

Called to render this object to an OpenGL context.

The following pre-conditions hold:

• The projection matrix of context has been set up correctly by the caller.
• The view parameters params matches the projection and the screen size, so the callee can depend on them to perform view frustum culling and LOD adaptation.

Specified by:

render in interface JOGLRenderable

Overrides:

render in class RenderableQualityModel

Parameters:

glRenderContext - TODO

toString

public String toString()

Overrides:

toString in class RenderableQualityModel

sizeOf

public long sizeOf()

Specified by:

sizeOf in interface MemoryAware

Overrides:

sizeOf in class QualityModel<RenderableQualityModelPart>

Returns:

the bytes this geometry occupies

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

hashCode

public int hashCode()

Implementation as proposed by Joshua Block in Effective Java (Addison-Wesley 2001), which supplies an even distribution and is relatively fast. It is created from field f as follows:

• boolean -- code = (f ? 0 : 1)
• byte, char, short, int -- code = (int)f
• long -- code = (int)(f ^ (f >>>32))
• float -- code = Float.floatToIntBits(f);
• double -- long l = Double.doubleToLongBits(f); code = (int)(l ^ (l >>> 32))
• all Objects, (where equals( ) calls equals( ) for this field) -- code = f.hashCode( )
• Array -- Apply above rules to each element

Combining the hash code(s) computed above: result = 37 * result + code;

Overrides:

hashCode in class Object

Returns:

(int) ( result >>> 32 ) ^ (int) result;

See Also:

Object.hashCode()

getTextureID

public final String getTextureID()

Returns:

the id of it's texture

getLocation

public final float[] getLocation()

Returns:

the location of this billboard (it's center axis)

getPosition

public float[] getPosition()

Specified by:

getPosition in interface PositionableModel

Returns:

the position of the implementing class.

getWidth

public final float getWidth()

Returns:

the width

getHeight

public final float getHeight()

Returns:

the height

renderPrepared

public void renderPrepared(javax.media.opengl.GL context,
                           float[] eye)

Parameters:

context -

eye -

getErrorScalar

public float getErrorScalar()

Specified by:

getErrorScalar in interface PositionableModel

Returns:

a scalar which is represents the 'error' of this positionable.

getObjectHeight

public float getObjectHeight()

Specified by:

getObjectHeight in interface PositionableModel

Returns:

a scalar which represents the 'height' of this positionable.

getGroundLevel

public float getGroundLevel()

Specified by:

getGroundLevel in interface PositionableModel

Returns:

a scalar which represents the 'groundlevel' of this positionable.

getModelBBox

public float[] getModelBBox()

Specified by:

getModelBBox in interface PositionableModel

Returns:

the boundingbox of the model with float[0][0-3] the min, float[1][0-3] the max.