Class PointSound

Direct Known Subclasses:
ConeSound

public class PointSound extends Sound
The PointSound node (a sub-class of the Sound node) defines a spatially located sound source whose waves radiate uniformly in all directions from a given location in space. It has the same attributes as a Sound object with the addition of a location and the specification of distance-based gain attenuation for listener positions between an array of distances.

A sound's amplitude is attenuated based on the distance between the listener and the sound source position. A piecewise linear curve (defined in terms of pairs of distance and gain scale factor) specifies the gain scale factor slope. The PointSound's location and attenuation distances are defined in the local coordinate system of the node.

Distance Gain Attenuation

    Associated with distances from the listener to the sound source via an array of (distance, gain-scale-factor) pairs. The gain scale factor applied to the sound source is the linear interpolated gain value between the distance value range that includes the current distance from the listener to the sound source. If the distance from the listener to the sound source is less than the first distance in the array, the first gain scale factor is applied to the sound source. This creates a spherical region around the listener within which all sound gain is uniformly scaled by the first gain in the array. If the distance from the listener to the sound source is greater than the last distance in the array, the last gain scale factor is applied to the sound source.

    Distance elements in this array of Point2f is a monotonically-increasing set of floating point numbers measured from the location of the sound source. Gain scale factors elements in this list of pairs can be any positive floating point numbers. While for most applications this list of gain scale factors will usually be monotonically-decreasing, they do not have to be. If this is not set, no distance gain attenuation is performed (equivalent to using a distance gain of 1.0 for all distances).

    getDistanceGainLength method returns the length of the distance gain attenuation arrays. Arrays passed into getDistanceGain methods should all be at least this size.

    There are two methods for getDistanceGain, one returning an array of points, the other returning separate arrays for each attenuation component.

  • Field Details

    • ALLOW_POSITION_READ

      public static final int ALLOW_POSITION_READ
      Specifies that this node allows access to its object's position information.
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    • ALLOW_POSITION_WRITE

      public static final int ALLOW_POSITION_WRITE
      Specifies that this node allows writing to its object's position information.
      See Also:
    • ALLOW_DISTANCE_GAIN_READ

      public static final int ALLOW_DISTANCE_GAIN_READ
      Specifies that this node allows access to its object's distance gain attenuation information.
      See Also:
    • ALLOW_DISTANCE_GAIN_WRITE

      public static final int ALLOW_DISTANCE_GAIN_WRITE
      Specifies that this node allows writing to its object's distance gain attenuation information.
      See Also:
  • Constructor Details

    • PointSound

      public PointSound()
      Constructs and initializes a new PointSound node using default parameters. The following default values are used:
        position vector: (0.0, 0.0, 0.0)
        Back attenuation: null
        distance gain attenuation: null (no attenuation performed)
    • PointSound

      public PointSound(MediaContainer soundData, float initialGain, javax.vecmath.Point3f position)
      Constructs a PointSound node object using only the provided parameter values for sound data, sample gain, and position. The remaining fields are set to the above default values. This form uses a point as input for its position.
      Parameters:
      soundData - sound data associated with this sound source node
      initialGain - amplitude scale factor applied to sound source
      position - 3D location of source
    • PointSound

      public PointSound(MediaContainer soundData, float initialGain, float posX, float posY, float posZ)
      Constructs a PointSound node object using only the provided parameter values for sound data, sample gain, and position. The remaining fields are set to to the above default values. This form uses individual float parameters for the elements of the position point.
      Parameters:
      soundData - sound data associated with this sound source node
      initialGain - amplitude scale factor applied to sound source data
      posX - x coordinate of location of source
      posY - y coordinate of location of source
      posZ - z coordinate of location of source
    • PointSound

      public PointSound(MediaContainer soundData, float initialGain, int loopCount, boolean release, boolean continuous, boolean enable, Bounds region, float priority, javax.vecmath.Point3f position, javax.vecmath.Point2f[] distanceGain)
      Construct a PointSound object accepting Point3f as input for the position and accepting an array of Point2f for the distance attenuation values where each pair in the array contains a distance and a gain scale factor.
      Parameters:
      soundData - sound data associated with this sound source node
      initialGain - amplitude scale factor applied to sound source
      loopCount - number of times loop is looped
      release - flag denoting playing sound data to end
      continuous - denotes that sound silently plays when disabled
      enable - sound switched on/off
      region - scheduling bounds
      priority - playback ranking value
      position - 3D location of source
      distanceGain - array of (distance,gain) pairs controling attenuation
    • PointSound

      public PointSound(MediaContainer soundData, float initialGain, int loopCount, boolean release, boolean continuous, boolean enable, Bounds region, float priority, float posX, float posY, float posZ, javax.vecmath.Point2f[] distanceGain)
      Construct a PointSound object accepting individual float parameters for the elements of the position point, and accepting an array of Point2f for the distance attenuation values where each pair in the array contains a distance and a gain scale factor.
      Parameters:
      soundData - sound data associated with this sound source node
      initialGain - amplitude scale factor applied to sound source
      loopCount - number of times loop is looped
      release - flag denoting playing sound to end
      continuous - denotes that sound silently plays when disabled
      enable - sound switched on/off
      region - scheduling bounds
      priority - playback ranking value
      posX - x coordinate of location of source
      posY - y coordinate of location of source
      posZ - z coordinate of location of source
      distanceGain - array of (distance,gain) pairs controling attenuation
    • PointSound

      public PointSound(MediaContainer soundData, float initialGain, int loopCount, boolean release, boolean continuous, boolean enable, Bounds region, float priority, javax.vecmath.Point3f position, float[] attenuationDistance, float[] attenuationGain)
      Construct a PointSound object accepting points as input for the position. and accepting separate arrays for the distance and gain scale factors components of distance attenuation.
      Parameters:
      soundData - sound data associated with this sound source node
      initialGain - amplitude scale factor applied to sound source
      loopCount - number of times loop is looped
      release - flag denoting playing sound data to end
      continuous - denotes that sound silently plays when disabled
      enable - sound switched on/off
      region - scheduling bounds
      priority - playback ranking value
      position - 3D location of source
      attenuationDistance - array of distance values used for attenuation
      attenuationGain - array of gain scale factors used for attenuation
    • PointSound

      public PointSound(MediaContainer soundData, float initialGain, int loopCount, boolean release, boolean continuous, boolean enable, Bounds region, float priority, float posX, float posY, float posZ, float[] attenuationDistance, float[] attenuationGain)
      Construct a PointSound object accepting individual float parameters for the elements of the position points, and accepting separate arrays for the distance and gain scale factors components of distance attenuation.
      Parameters:
      soundData - sound data associated with this sound source node
      initialGain - amplitude scale factor applied to sound source
      loopCount - number of times loop is looped
      release - flag denoting playing sound to end
      continuous - denotes that sound silently plays when disabled
      enable - sound switched on/off
      region - scheduling bounds
      priority - playback ranking value
      posX - x coordinate of location of source
      posY - y coordinate of location of source
      posZ - z coordinate of location of source
      attenuationDistance - array of distance values used for attenuation
      attenuationGain - array of gain scale factors used for attenuation
  • Method Details

    • setPosition

      public void setPosition(javax.vecmath.Point3f position)
      Sets this sound's location from the vector provided.
      Parameters:
      position - the new location
      Throws:
      CapabilityNotSetException - if appropriate capability is not set and this object is part of live or compiled scene graph
    • setPosition

      public void setPosition(float x, float y, float z)
      Sets this sound's position from the three values provided.
      Parameters:
      x - the new x position
      y - the new y position
      z - the new z position
      Throws:
      CapabilityNotSetException - if appropriate capability is not set and this object is part of live or compiled scene graph
    • getPosition

      public void getPosition(javax.vecmath.Point3f position)
      Retrieves this sound's direction and places it in the vector provided.
      Parameters:
      position - the variable to receive the direction vector
      Throws:
      CapabilityNotSetException - if appropriate capability is not set and this object is part of live or compiled scene graph
    • setDistanceGain

      public void setDistanceGain(javax.vecmath.Point2f[] attenuation)
      Sets this sound's distance gain attenuation - where gain scale factor is applied to sound based on distance listener is from sound source. This form of setDistanceGain takes these pairs of values as an array of Point2f.
      Parameters:
      attenuation - defined by pairs of (distance,gain-scale-factor)
      Throws:
      CapabilityNotSetException - if appropriate capability is not set and this object is part of live or compiled scene graph
    • setDistanceGain

      public void setDistanceGain(float[] distance, float[] gain)
      Sets this sound's distance gain attenuation as an array of Point2fs. This form of setDistanceGain accepts two separate arrays for these values. The distance and gainScale arrays should be of the same length. If the gainScale array length is greater than the distance array length, the gainScale array elements beyond the length of the distance array are ignored. If the gainScale array is shorter than the distance array, the last gainScale array value is repeated to fill an array of length equal to distance array.
      Parameters:
      distance - array of monotonically-increasing floats
      gain - array of non-negative scale factors
      Throws:
      CapabilityNotSetException - if appropriate capability is not set and this object is part of live or compiled scene graph
    • getDistanceGainLength

      public int getDistanceGainLength()
      Get the length of this node's distance gain attenuation arrays.
      Returns:
      distance gain attenuation array length
      Throws:
      CapabilityNotSetException - if appropriate capability is not set and this object is part of live or compiled scene graph
    • getDistanceGain

      public void getDistanceGain(javax.vecmath.Point2f[] attenuation)
      Gets this sound's distance attenuation. The distance attenuation pairs are copied into the specified array. The array must be large enough to hold all of the points. The individual array elements must be allocated by the caller.
      Parameters:
      attenuation - arrays containing distance attenuation pairs
      Throws:
      CapabilityNotSetException - if appropriate capability is not set and this object is part of live or compiled scene graph
    • getDistanceGain

      public void getDistanceGain(float[] distance, float[] gain)
      Gets this sound's distance gain attenuation values in separate arrays. The arrays must be large enough to hold all of the values.
      Parameters:
      distance - array of float distance from sound source
      gain - array of non-negative scale factors associated with
      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)
      Creates 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.
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    • duplicateNode

      public void duplicateNode(Node originalNode, boolean forceDuplicate)
      Copies all node information from originalNode into the current node. This method is called from the cloneNode method which is, in turn, called by the cloneTree method.

      For any NodeComponent objects contained by the object being duplicated, each NodeComponent object's duplicateOnCloneTree value is used to determine whether the NodeComponent should be duplicated in the new node or if just a reference to the current node should be placed in the new node. This flag can be overridden by setting the forceDuplicate parameter in the cloneTree method to true.
      NOTE: Applications should not call this method directly. It should only be called by the cloneNode method.

      Overrides:
      duplicateNode in class Node
      Parameters:
      originalNode - the original node to duplicate.
      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.
      Throws:
      ClassCastException - if originalNode is not an instance of PointSound
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