## 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_LOCALE_READ, ALLOW_PARENT_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, indexOfScope, insertScope, numScopes, removeAllScopes, removeScope, 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, getLocale, getLocalToVworld, getLocalToVworld, getParent, getPickable, setBounds, setBoundsAutoCompute, setCollidable, setPickable`

Methods inherited from class javax.media.j3d.SceneGraphObject
`clearCapability, clearCapabilityIsFrequent, duplicateSceneGraphObject, getCapability, getCapabilityIsFrequent, getName, getUserData, isCompiled, isLive, setCapability, setCapabilityIsFrequent, setName, setUserData, toString`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, 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.

  See Also:
    Constant Field Values

### ALLOW_DENSITY_WRITE

    public static final int ALLOW_DENSITY_WRITE

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

  See Also:
    Constant Field Values

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)`

Copyright 1996-2008 Sun Microsystems, Inc. All Rights Reserved. Use is subject to license terms.