javax.media.j3d
Class ExponentialFog

java.lang.Object
  |
  +--javax.media.j3d.SceneGraphObject
        |
        +--javax.media.j3d.Node
              |
              +--javax.media.j3d.Leaf
                    |
                    +--javax.media.j3d.Fog
                          |
                          +--javax.media.j3d.ExponentialFog

public class ExponentialFog

extends Fog

The ExponentialFog leaf node extends the Fog leaf node by adding a fog density that is used as the exponent of the fog equation. The density is defined in the local coordinate system of the node, but the actual fog equation will ideally take place in eye coordinates.

The fog blending factor, f, is computed as follows:

f = e^{-(density * z)}

where

z is the distance from the viewpoint.
density is the density of the fog.

In addition to specifying the fog density, ExponentialFog lets you specify the fog color, which is represented by R, G, and B color values, where a color of (0,0,0) represents black.

Field Summary

static int	ALLOW_DENSITY_READ Specifies that this ExponentialFog node allows read access to its density information.
static int	ALLOW_DENSITY_WRITE Specifies that this ExponentialFog node allows write access to its density information.

Fields inherited from class javax.media.j3d.Fog

ALLOW_COLOR_READ, ALLOW_COLOR_WRITE, ALLOW_INFLUENCING_BOUNDS_READ, ALLOW_INFLUENCING_BOUNDS_WRITE, ALLOW_SCOPE_READ, ALLOW_SCOPE_WRITE

Fields inherited from class javax.media.j3d.Node

ALLOW_AUTO_COMPUTE_BOUNDS_READ, ALLOW_AUTO_COMPUTE_BOUNDS_WRITE, ALLOW_BOUNDS_READ, ALLOW_BOUNDS_WRITE, ALLOW_COLLIDABLE_READ, ALLOW_COLLIDABLE_WRITE, ALLOW_LOCAL_TO_VWORLD_READ, ALLOW_PICKABLE_READ, ALLOW_PICKABLE_WRITE, ENABLE_COLLISION_REPORTING, ENABLE_PICK_REPORTING

Constructor Summary

ExponentialFog()
Constructs an ExponentialFog node with default parameters.

ExponentialFog(Color3f color)
Constructs an ExponentialFog node with the specified fog color.

ExponentialFog(Color3f color, float density)
Constructs an ExponentialFog node with the specified fog color and density.

ExponentialFog(float r, float g, float b)
Constructs an ExponentialFog node with the specified fog color.

ExponentialFog(float r, float g, float b, float density)
Constructs an ExponentialFog node with the specified fog color and density.

Method Summary

Node	cloneNode(boolean forceDuplicate) Used to create a new instance of the node.
float	getDensity() Gets fog density.
void	setDensity(float density) Sets fog density.

Methods inherited from class javax.media.j3d.Fog

addScope, getAllScopes, getColor, getInfluencingBoundingLeaf, getInfluencingBounds, getScope, insertScope, numScopes, removeScope, setColor, setColor, setInfluencingBoundingLeaf, setInfluencingBounds, setScope, updateNodeReferences

Methods inherited from class javax.media.j3d.Node

cloneTree, cloneTree, cloneTree, cloneTree, cloneTree, cloneTree, duplicateNode, getBounds, getBoundsAutoCompute, getCollidable, getLocalToVworld, getLocalToVworld, getParent, getPickable, setBounds, setBoundsAutoCompute, setCollidable, setPickable

Methods inherited from class javax.media.j3d.SceneGraphObject

clearCapability, duplicateSceneGraphObject, getCapability, getUserData, isCompiled, isLive, setCapability, setUserData

Methods inherited from class java.lang.Object

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

Field Detail

ALLOW_DENSITY_READ

public static final int ALLOW_DENSITY_READ

Specifies that this ExponentialFog node allows read access to its density information.

ALLOW_DENSITY_WRITE

public static final int ALLOW_DENSITY_WRITE

Specifies that this ExponentialFog node allows write access to its density information.

Constructor Detail

ExponentialFog

public ExponentialFog()

Constructs an ExponentialFog node with default parameters. The default values are as follows:

density : 1.0

ExponentialFog

public ExponentialFog(Color3f color)

Constructs an ExponentialFog node with the specified fog color.

Parameters:

color - the fog color

ExponentialFog

public ExponentialFog(Color3f color,
                      float density)

Constructs an ExponentialFog node with the specified fog color and density.

Parameters:

color - the fog color

density - the density of the fog

ExponentialFog

public ExponentialFog(float r,
                      float g,
                      float b)

Constructs an ExponentialFog node with the specified fog color.

Parameters:

r - the red component of the fog color

g - the green component of the fog color

b - the blue component of the fog color

ExponentialFog

public ExponentialFog(float r,
                      float g,
                      float b,
                      float density)

Constructs an ExponentialFog node with the specified fog color and density.

Parameters:

r - the red component of the fog color

g - the green component of the fog color

b - the blue component of the fog color

density - the density of the fog

Method Detail

setDensity

public void setDensity(float density)

Sets fog density.

Parameters:

density - the new density of this fog

Throws:

CapabilityNotSetException - if appropriate capability is not set and this object is part of live or compiled scene graph

getDensity

public float getDensity()

Gets fog density.

Returns:

the density of this fog

Throws:

CapabilityNotSetException - if appropriate capability is not set and this object is part of live or compiled scene graph

cloneNode

public Node cloneNode(boolean forceDuplicate)

Used to create a new instance of the node. This routine is called by cloneTree to duplicate the current node.

Overrides:

cloneNode in class Node

Parameters:

forceDuplicate - when set to true, causes the duplicateOnCloneTree flag to be ignored. When false, the value of each node's duplicateOnCloneTree variable determines whether NodeComponent data is duplicated or copied.

See Also:

Node.cloneTree(), Node.cloneNode(boolean), Node.duplicateNode(javax.media.j3d.Node, boolean), NodeComponent.setDuplicateOnCloneTree(boolean)