org.web3d.vrml.renderer.common.nodes
Class BaseSequencerNode

java.lang.Object
  org.web3d.vrml.renderer.common.nodes.AbstractNode
      org.web3d.vrml.renderer.common.nodes.BaseSequencerNode

All Implemented Interfaces:

FrameStateListener, VRMLChildNodeType, VRMLNode, VRMLNodeType, VRMLSequencerNodeType

public abstract class BaseSequencerNode

extends AbstractNode

implements VRMLSequencerNodeType

Abstract implementation of a sequencer so that specific instances can derive from it.

Sequencer nodes are designed for discrete animation. Sequencers are driven by an input and produce corresponding impulse output functions.

Version:

$Revision: 1.3 $

Author:

Alan Hudson

Field Summary

protected static int	FIELD_KEY The field index for key
protected static int	FIELD_KEY_VALUE The field index for keyValue
protected static int	FIELD_NEXT The field index for next
protected static int	FIELD_PREVIOUS The field index for previous
protected static int	FIELD_SET_FRACTION The field index for set_fraction
protected static int	FIELD_VALUE_CHANGED The field index for the value_changed field
protected static int	LAST_SEQUENCER_INDEX The last field index used by this class
protected int	numKey The number of valid items in vfKey
protected float	vfFraction The value of the fraction field
protected float[]	vfKey The value of the key field

Fields inherited from class org.web3d.vrml.renderer.common.nodes.AbstractNode

BAD_NODE_MSG, errorReporter, FIELD_METADATA, fieldData, hasChanged, INIT_ONLY_WRITE_MSG, inSetup, isDEF, isStatic, LAST_NODE_INDEX, METADATA_NODE_MSG, METADATA_PROTO_MSG, nodeName, pMetadata, refCount, stateManager, vfMetadata, vrmlMajorVersion, vrmlMinorVersion

Constructor Summary

BaseSequencerNode(java.lang.String name)
Initialise the time dependent node and it's fields that are held locally.

Method Summary

protected void	copy(VRMLSequencerNodeType node) Set the fields of the interpolator node that has the fields set based on the fields of the passed in node.
VRMLFieldData	getFieldValue(int index) Get the value of a field.
float	getFraction() Get the value of the fraction field.
float[]	getKey() Get current value of key field value.
int	getNumKey() Get the number of valid keys defined for this interpolator.
int	getPrimaryType() Get the primary type of this node.
void	sendRoute(double time, int srcIndex, VRMLNodeType destNode, int destIndex) Send a routed value from this node to the given destination node.
void	setKey(float[] keys, int numValid) Set a new value for the key field.
void	setNext() Cause the next value to be generated on the output.
void	setPrevious() Cause the previous value to be generated on the output.
void	setValue(int index, float[] value, int numValid) Set the value of the field at the given index as an array of floats.

Methods inherited from class org.web3d.vrml.renderer.common.nodes.AbstractNode

addNodeListener, allEventsComplete, checkNodeType, checkSecondaryType, checkSecondaryType, fireFieldChanged, getMetadataObject, getNodeFieldIndices, getRefCount, getSecondaryType, getUserData, getVRMLNodeName, hasFieldChanged, isDEF, isSetupFinished, notifyExternProtoLoaded, removeNodeListener, setDEF, setErrorReporter, setFrameStateManager, setMetadataObject, setupFinished, setUserData, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setVersion, updateRefCount

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.web3d.vrml.nodes.VRMLSequencerNodeType

setFraction

Methods inherited from interface org.web3d.vrml.nodes.VRMLNodeType

addNodeListener, getMetadataObject, getRefCount, hasFieldChanged, isSetupFinished, notifyExternProtoLoaded, removeNodeListener, setDEF, setFrameStateManager, setMetadataObject, setupFinished, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, updateRefCount

Methods inherited from interface org.web3d.vrml.lang.VRMLNode

getFieldDeclaration, getFieldIndex, getNodeFieldIndices, getNumFields, getSecondaryType, getUserData, getVRMLNodeName, isDEF, setErrorReporter, setUserData, setVersion

Methods inherited from interface org.web3d.vrml.nodes.FrameStateListener

allEventsComplete

Field Detail

FIELD_NEXT

protected static final int FIELD_NEXT

The field index for next

See Also:

Constant Field Values

FIELD_PREVIOUS

protected static final int FIELD_PREVIOUS

The field index for previous

See Also:

Constant Field Values

FIELD_SET_FRACTION

protected static final int FIELD_SET_FRACTION

The field index for set_fraction

See Also:

Constant Field Values

FIELD_KEY

protected static final int FIELD_KEY

The field index for key

See Also:

Constant Field Values

FIELD_KEY_VALUE

protected static final int FIELD_KEY_VALUE

The field index for keyValue

See Also:

Constant Field Values

FIELD_VALUE_CHANGED

protected static final int FIELD_VALUE_CHANGED

The field index for the value_changed field

See Also:

Constant Field Values

LAST_SEQUENCER_INDEX

protected static final int LAST_SEQUENCER_INDEX

The last field index used by this class

See Also:

Constant Field Values

vfFraction

protected float vfFraction

The value of the fraction field

vfKey

protected float[] vfKey

The value of the key field

numKey

protected int numKey

The number of valid items in vfKey

Constructor Detail

BaseSequencerNode

public BaseSequencerNode(java.lang.String name)

Initialise the time dependent node and it's fields that are held locally.

Parameters:

name - The name of the type of node

Method Detail

copy

protected void copy(VRMLSequencerNodeType node)

Set the fields of the interpolator node that has the fields set based on the fields of the passed in node.

Parameters:

node - The interpolator node to copy info from

getPrimaryType

public int getPrimaryType()

Get the primary type of this node. Replaces the instanceof mechanism for use in switch statements.

Specified by:

getPrimaryType in interface VRMLNode

Returns:

The primary type

setNext

public void setNext()

Cause the next value to be generated on the output. This is equivalent to sending a value to the next inputOnly field.

Specified by:

setNext in interface VRMLSequencerNodeType

setPrevious

public void setPrevious()

Cause the previous value to be generated on the output. This is equivalent to sending a value to the previous inputOnly field.

Specified by:

setPrevious in interface VRMLSequencerNodeType

getFraction

public float getFraction()

Get the value of the fraction field.

Specified by:

getFraction in interface VRMLSequencerNodeType

Returns:

The current value for fraction

setKey

public void setKey(float[] keys,
                   int numValid)

Set a new value for the key field. Null will delete all key values.

Specified by:

setKey in interface VRMLSequencerNodeType

Parameters:

keys - The new key values to use

numValid - The number of valid values to copy from the array

getNumKey

public int getNumKey()

Get the number of valid keys defined for this interpolator.

Specified by:

getNumKey in interface VRMLSequencerNodeType

Returns:

a value >= 0

getKey

public float[] getKey()

Get current value of key field value. If no keys exist a blank float[] will be returned.

Specified by:

getKey in interface VRMLSequencerNodeType

Returns:

The current key values

getFieldValue

public VRMLFieldData getFieldValue(int index)
                            throws InvalidFieldException

Get the value of a field. If the field is a primitive type, it will return a class representing the value. For arrays or nodes it will return the instance directly.

Specified by:

getFieldValue in interface VRMLNodeType

Overrides:

getFieldValue in class AbstractNode

Parameters:

index - The index of the field to change.

Returns:

The class representing the field value

Throws:

InvalidFieldException - The field index is not known

sendRoute

public void sendRoute(double time,
                      int srcIndex,
                      VRMLNodeType destNode,
                      int destIndex)

Send a routed value from this node to the given destination node. The route should use the appropriate setValue() method of the destination node. It should not attempt to cast the node up to a higher level. Routing should also follow the standard rules for the loop breaking and other appropriate rules for the specification.

Specified by:

sendRoute in interface VRMLNodeType

Overrides:

sendRoute in class AbstractNode

Parameters:

time - The time that this route occurred (not necessarily epoch time. Should be treated as a relative value only)

srcIndex - The index of the field in this node that the value should be sent from

destNode - The node reference that we will be sending the value to

destIndex - The index of the field in the destination node that the value should be sent to.

setValue

public void setValue(int index,
                     float[] value,
                     int numValid)
              throws InvalidFieldException,
                     InvalidFieldValueException

Set the value of the field at the given index as an array of floats. This would be used to set MFFloat, SFVec2f, SFFloat and SFRotation field types.

Specified by:

setValue in interface VRMLNodeType

Overrides:

setValue in class AbstractNode

Parameters:

index - The index of destination field to set

value - The new value to use for the node

numValid - The number of valid values to copy from the array

Throws:

InvalidFieldException - The field index is not know

InvalidFieldValueException - The value provided is out of range for the field type.