Package org.web3d.vrml.lang

Interface BasicScene

All Known Subinterfaces:

VRMLScene

All Known Implementing Classes:

AbstractScene, CRVRMLScene, ProtoScene, SAIVRMLScene

public interface BasicScene

Abstract representation of a contained scene graph.

The scene returns lists of nodes of the given type. This list contains all of the nodes of that type in the order that they are declared in the incoming stream. As the scene changes due to scripting and external interactions, it will add new instances of these nodes to the end of the list. If there is none of the given node types, the methods shall return empty lists.

Version:

$Revision: 1.19 $

Author:

Justin Couch

Method Summary

Modifier and Type	Method	Description
void	addNode(VRMLNode node)	Add a node to this scene.
void	addTemplate(VRMLNodeTemplate template)	Add a new template to this scene.
List<VRMLNode>	getByPrimaryType(int type)	Get the list of nodes of the given primary type declared in this scene.
List<VRMLNode>	getBySecondaryType(int type)	Get the list of nodes of the given secondary type declared in this scene.
Map<String,VRMLNode>	getDEFNodes()	Get a list of the nodes that have been named with DEF in this scene.
Map<String,VRMLNode>	getImports()	Get the IMPORT declaration information from this scene.
int	getLayerId()	Get the layer ID of this scene.
String	getLoadedURI()	Get the URI of the world that this scene represents.
SceneMetaData	getMetaData()	Get the meta data associated with this scene.
VRMLNodeFactory	getNodeFactory()	Get the node factory that represents the setup of this scene.
VRMLNodeTemplate	getNodeTemplate(String name)	Get the proto defined by the name.
List<VRMLNodeTemplate>	getNodeTemplates()	Get the list of top-level node templates declared in this scene.
String	getProfileName()	Get the profile name for this scene
VRMLNode	getRootNode()	Get the node that forms the root of this proto body.
List<ROUTE>	getRoutes()	Get the list of ROUTEs declared in this scene.
int	getSpecificationMajorVersion()	Get the specification major version that this scene belongs to.
int	getSpecificationMinorVersion()	Get the specification minor version that this scene belongs to.
String	getWorldRootURL()	Get the Root URL of the world that this scene represents.
void	removeNode(VRMLNode node)	Remove a node from this scene.
void	removeTemplate(VRMLNodeTemplate template)	Remove a template from this scene.
void	setLayerId(int id)	Set the layer ID of this scene.
void	setNodeFactory(VRMLNodeFactory fac)	Set the node factory instance to be used with this scene.

Method Details

getLayerId

int getLayerId()

Get the layer ID of this scene. This method is only useful when the scene is not the root scene, such as being buried in an Inline.

Returns:

id A non-negative layer identifier

setLayerId

void setLayerId(int id)

Set the layer ID of this scene. This method is only called when the scene is not the root scene, such as being buried in an Inline. This passes down the layer ID that the inline is kept in. The scene should make sure that this is passed down to the children nodes of this scene, but making sure to ignore any contained layers.

Parameters:

id - A non-negative layer identifier

getMetaData

SceneMetaData getMetaData()

Get the meta data associated with this scene. A scene should always have some amount of metadata.

Returns:

The current meta data

getRootNode

VRMLNode getRootNode()

Get the node that forms the root of this proto body. The body will contain the renderable scene graph as the first item of the node and all other children as the non-renderable parts, as per the VRML spec.

Returns:

A reference to the root node of the scene

getWorldRootURL

String getWorldRootURL()

Get the Root URL of the world that this scene represents. This is the URL minus the file name, but including any directory information.

Returns:

The full URL of the world's location

getLoadedURI

String getLoadedURI()

Get the URI of the world that this scene represents. Returns null for dynamically created worlds.

Returns:

The full URI of the world's location

getNodeFactory

VRMLNodeFactory getNodeFactory()

Get the node factory that represents the setup of this scene. Provided so that a caller can make use of the factory to create nodes that are only valid as part of the initial setup of this scene.

Returns:

The VRMLNodeFactory instance configured to represent this scene

setNodeFactory

void setNodeFactory(VRMLNodeFactory fac)
             throws IllegalArgumentException,
IllegalStateException

Set the node factory instance to be used with this scene. This is a one-shot call. After it has been set, it cannot be changed. An exception will be thrown.

Parameters:

fac - The factory instance to use

Throws:

IllegalArgumentException - The factory instance provided was null

IllegalStateException - A factory has already been set

getSpecificationMajorVersion

int getSpecificationMajorVersion()

Get the specification major version that this scene belongs to.

Returns:

The major version number

getSpecificationMinorVersion

int getSpecificationMinorVersion()

Get the specification minor version that this scene belongs to.

Returns:

The minor version number

addNode

void addNode(VRMLNode node)

Add a node to this scene. This is a single node instance and the implementation is not required to traverse this node for all its children and sort them as well. It is expected external code shall be handling the tree traversal. The code will make sure that this node instance is only inserted into the internal structures exactly once, even if this is a duplicate call.

Parameters:

node - The node to add

removeNode

void removeNode(VRMLNode node)

Remove a node from this scene. The implementation shall silently ignore a request to remove a node that does not exist in this scene.

Parameters:

node - The node to add

addTemplate

void addTemplate(VRMLNodeTemplate template)

Add a new template to this scene. Each template is assumed to be independent of the others. If a template contains further templates, the nested instances should not be added to this scene.

Parameters:

template - The new template instance to use

removeTemplate

void removeTemplate(VRMLNodeTemplate template)

Remove a template from this scene. The implementation shall silently ignore a request to remove a template that does not exist in this scene. If instances of this template already exist, they shall remain in the scene.

Parameters:

template - The template instance to remove

getRoutes

List<ROUTE> getRoutes()

Get the list of ROUTEs declared in this scene.

Returns:

The list of ROUTE instances in this scene

getNodeTemplates

List<VRMLNodeTemplate> getNodeTemplates()

Get the list of top-level node templates declared in this scene. The list will not be sorted into separate sets of PROTO and EXTERNPROTO instances.

Returns:

The list of VRMLNodeTemplate instances in this scene

getByPrimaryType

List<VRMLNode> getByPrimaryType(int type)

Get the list of nodes of the given primary type declared in this scene. Proto instances may be fetched through this method too as they have a primary type of ProtoInstance.

Parameters:

type - index of type

Returns:

The list of node instances in this scene.

getBySecondaryType

List<VRMLNode> getBySecondaryType(int type)

Get the list of nodes of the given secondary type declared in this scene.

Parameters:

type - index of type

Returns:

a list of node instances in this scene.

getNodeTemplate

VRMLNodeTemplate getNodeTemplate(String name)

Get the proto defined by the name. If no proto is known by that name then return null.

Parameters:

name - The name of the proto to fetch.

Returns:

The proto known by that name or null

getDEFNodes

Map<String,VRMLNode> getDEFNodes()

Get a list of the nodes that have been named with DEF in this scene. The map is keyed by the DEF name string and the values are the VRMLNodeType instances. If there are no nodes marked with DEF then the map will be empty.

Returns:

A map of the DEF'd nodes.

getImports

Map<String,VRMLNode> getImports()

Get the IMPORT declaration information from this scene. There is no validity checking of these statements. The map is the inline's DEF name as the key to the value being a String[] that contains the inlined file's exported name and the AS rename portion.

Returns:

A map of the imported nodes

getProfileName

String getProfileName()

Get the profile name for this scene

Returns:

Profile name