Package org.web3d.vrml.renderer.ogl

Class OGLVRMLSceneBuilder

java.lang.Object

org.web3d.vrml.renderer.ogl.OGLVRMLSceneBuilder

All Implemented Interfaces:

BinaryContentHandler, ContentHandler, ProtoHandler, RouteHandler, ScriptHandler, StringContentHandler, SceneBuilder

public class OGLVRMLSceneBuilder
extends Object
implements SceneBuilder

A OpenGL file loader implementation for reading VRML and X3D files and building a OpenGL scene graph with them.

If the user asks for no behaviors, then we will still load nodes that use behaviors, but will disable their use. For example, a LOD will still need to have all of the geometry loaded, just not shown or activated because the LOD's internal behavior is disabled.

Version:

$Revision: 1.28 $

Author:

Justin Couch

Constructor Summary

Constructors

Constructor	Description
OGLVRMLSceneBuilder()	Create a new default instance of the scene builder.
OGLVRMLSceneBuilder(VRMLNodeFactory fac)	Create a scene builder with the given node factory.

Method Summary

Modifier and Type	Method	Description
void	allowVRML97Only(boolean enabled)	Change the builder to recognise only VRML97 content or allow any version to be loaded.
void	componentDecl(String componentInfo)	A component declaration has been found in the code.
void	endDocument()	Declaration of the end of the document.
void	endExternProtoDecl()	Notification of the end of an EXTERNPROTO declaration.
void	endField()	Notification of the end of a field declaration.
void	endNode()	Notification of the end of a node declaration.
void	endProtoBody()	Notification of the end of an ordinary proto body.
void	endProtoDecl()	Notification of the end of an ordinary proto declaration statement.
void	endScriptDecl()	Notification of the end of a script declaration.
void	exportDecl(String defName, String exported)	An EXPORT declaration has been found in the document.
void	externProtoURI(String[] values)	Notification of the URI list for an EXTERNPROTO.
void	fieldValue(boolean value)	Set the value of the field at the given index as an boolean.
void	fieldValue(boolean[] value, int len)	Set the value of the field at the given index as an array of boolean.
void	fieldValue(double value)	Set the value of the field at the given index as an double.
void	fieldValue(double[] value, int len)	Set the value of the field at the given index as an array of doubles.
void	fieldValue(float value)	Set the value of the field at the given index as a float.
void	fieldValue(float[] value, int len)	Set the value of the field at the given index as an array of floats.
void	fieldValue(int value)	Set the value of the field at the given index as an integer.
void	fieldValue(int[] value, int len)	Set the value of the field at the given index as an array of integers.
void	fieldValue(long value)	Set the value of the field at the given index as an long.
void	fieldValue(long[] value, int len)	Set the value of the field at the given index as an array of longs.
void	fieldValue(String value)	The value of a normal field.
void	fieldValue(String[] values)	The value of an MFField where the underlying parser knows about how the values are broken up.
void	fieldValue(String[] value, int len)	Set the value of the field at the given index as an array of strings.
VRMLScene	getScene()	Get the scene that was last built by this scene handler.
void	importDecl(String inline, String exported, String imported)	An IMPORT declaration has been found in the document.
void	metaDecl(String key, String value)	A META declaration has been found in the code.
void	profileDecl(String profileName)	A profile declaration has been found in the code.
void	protoFieldDecl(int access, String type, String name, Object value)	Notification of a proto's field declaration.
void	protoIsDecl(String fieldName)	Notification of a field value uses an IS statement.
void	releaseScene()	Release any references to the scene that was last built by this scene handler.
void	reset()	Reset the builder.
void	routeDecl(String srcNodeName, String srcFieldName, String destNodeName, String destFieldName)	Notification of a ROUTE declaration in the file.
void	scriptFieldDecl(int access, String type, String name, Object value)	Notification of a script's field declaration.
void	setDocumentLocator(DocumentLocator loc)	Set the document locator that can be used by the implementing code to find out information about the current line information.
void	setErrorReporter(org.j3d.util.ErrorReporter reporter)	Set the error handler instance used by this instance of the builder.
void	setFrameStateManager(FrameStateManager fsm)	Set the frame state manager to use for the builder after this point.
void	setLoadRequirements(boolean useBackgrounds, boolean useFogs, boolean useLights, boolean useAudio, boolean useViewpoints, boolean useExternals)	Set the flags about what to load.
void	startDocument(String uri, String url, String encoding, String type, String version, String comment)	Begin parsing
void	startExternProtoDecl(String name)	Notification of the start of an EXTERNPROTO declaration of the given name.
void	startField(String name)	Notification of a field declaration.
void	startNode(String name, String defName)	Notification of the start of a node.
void	startProtoBody()	Notification of the start of an ordinary proto body.
void	startProtoDecl(String name)	Notification of the start of an ordinary (inline) proto declaration.
void	startScriptDecl()	Notification of the start of a script declaration.
void	useDecl(String defName)	The field value is a USE for the given node name.

Methods inherited from class java.lang.Object

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

Constructor Details

OGLVRMLSceneBuilder

public OGLVRMLSceneBuilder()

Create a new default instance of the scene builder. This uses the default factory for nodes.

OGLVRMLSceneBuilder

public OGLVRMLSceneBuilder(VRMLNodeFactory fac)

Create a scene builder with the given node factory. The factory should be producing nodes that conform to the OGLVRMLNode interface as we expect some of the capabilities to be there. Using any other form of factory is asking for errors. If the factory reference is null then the default factory will be used.

Parameters:

fac - The factory instance to use.

Method Details

setErrorReporter

public void setErrorReporter(org.j3d.util.ErrorReporter reporter)

Set the error handler instance used by this instance of the builder. The handler is used to report errors at the higher level. A value of null will clear the current instance and return to the default handling.

Specified by:

setErrorReporter in interface SceneBuilder

Parameters:

reporter - The instance to use or null to clear

getScene

public VRMLScene getScene()

Get the scene that was last built by this scene handler. If none of the methods have been called yet, this will return a null reference. The scene instance returned by this builder will not have had any external references resolved. Externprotos, scripts, Inlines and all other nodes that reference part of their data as a URL will need to be loaded separately.

Specified by:

getScene in interface SceneBuilder

Returns:

The last built scene

releaseScene

public void releaseScene()

Release any references to the scene that was last built by this scene handler. This should be called by the loader after a reference to the scene has been retrieved using the getScene() method.

Specified by:

releaseScene in interface SceneBuilder

reset

public void reset()

Reset the builder. This is used to make sure that the builder has been reset after a parsing run just in case the last parsing run exited abnormally and left us in an odd state. Sometimes this can prevent us from parsing again. This method should be called just before the VRMLReader.parse() method is called.

The flags set about what to load are not reset by this method.

Specified by:

reset in interface SceneBuilder

allowVRML97Only

public void allowVRML97Only(boolean enabled)

Change the builder to recognise only VRML97 content or allow any version to be loaded.

Specified by:

allowVRML97Only in interface SceneBuilder

Parameters:

enabled - true to restrict content to VRML97 only

setFrameStateManager

public void setFrameStateManager(FrameStateManager fsm)

Set the frame state manager to use for the builder after this point. Set a value of null it will clear the currently set items.

Specified by:

setFrameStateManager in interface SceneBuilder

Parameters:

fsm - The state manager to use

setDocumentLocator

public void setDocumentLocator(DocumentLocator loc)

Set the document locator that can be used by the implementing code to find out information about the current line information. This method is called by the parser to your code to give you a locator to work with. If this has not been set by the time startDocument() has been called, you can assume that you will not have one available.

Specified by:

setDocumentLocator in interface ContentHandler

Parameters:

loc - The locator instance to use

startDocument

public void startDocument(String uri,
 String url,
 String encoding,
 String type,
 String version,
 String comment)
                   throws SAVException,
VRMLException

Begin parsing

Specified by:

startDocument in interface ContentHandler

Parameters:

uri - full path of directory and filename

url - directory path

encoding - utf8 for VRML, xml for XML

type - example #X3D for ClassicVRML, ___ for XML

version - example V3.0 (VRML) or 3.3 (X3D)

comment - optional

Throws:

SAVException

VRMLException

profileDecl

public void profileDecl(String profileName)
                 throws SAVException,
VRMLException

A profile declaration has been found in the code. A proto builder should never encounter this situation.

Specified by:

profileDecl in interface ContentHandler

Parameters:

profileName - The name of the profile to use

Throws:

SAVException - This call is taken at the wrong time in the structure of the document.

VRMLException - This call is taken at the wrong time in the structure of the document.

componentDecl

public void componentDecl(String componentInfo)
                   throws SAVException,
VRMLException

A component declaration has been found in the code. A proto builder should never encounter this situation.

Specified by:

componentDecl in interface ContentHandler

Parameters:

componentInfo - The name of the component to use

Throws:

SAVException - This call is taken at the wrong time in the structure of the document.

VRMLException - This call is taken at the wrong time in the structure of the document.

metaDecl

public void metaDecl(String key,
 String value)
              throws SAVException,
VRMLException

A META declaration has been found in the code. There may be zero or more meta declarations in the file, appearing just after the component declaration. Each meta declaration has a key and value strings. No information is to be implied from this. It is for extra data only.

Specified by:

metaDecl in interface ContentHandler

Parameters:

key - The value of the key string

value - The value of the value string

Throws:

SAVException - This call is taken at the wrong time in the structure of the document.

VRMLException - This call is taken at the wrong time in the structure of the document.

importDecl

public void importDecl(String inline,
 String exported,
 String imported)
                throws SAVException,
VRMLException

An IMPORT declaration has been found in the document. All three parameters will always be provided, regardless of whether the AS keyword has been used or not. The parser implementation will automatically set the local import name as needed.

Specified by:

importDecl in interface ContentHandler

Parameters:

inline - The name of the inline DEF nodes

exported - The exported name from the inlined file

imported - The local name to use for the exported name

Throws:

SAVException - This call is taken at the wrong time in the structure of the document.

VRMLException - This call is taken at the wrong time in the structure of the document.

exportDecl

public void exportDecl(String defName,
 String exported)
                throws SAVException,
VRMLException

An EXPORT declaration has been found in the document. Both parameters will always be provided regardless of whether the AS keyword has been used. The parser implementation will automatically set the exported name as needed.

Specified by:

exportDecl in interface ContentHandler

Parameters:

defName - The DEF name of the nodes to be exported

exported - The name to be exported as

Throws:

SAVException - This call is taken at the wrong time in the structure of the document.

VRMLException - This call is taken at the wrong time in the structure of the document.

endDocument

public void endDocument()
                 throws SAVException,
VRMLException

Declaration of the end of the document. There will be no further parsing and hence events after this.

Specified by:

endDocument in interface ContentHandler

Throws:

SAVException - This call is taken at the wrong time in the structure of the document

VRMLException - The content provided is invalid for this part of the document or can't be parsed

startNode

public void startNode(String name,
 String defName)
               throws SAVException,
VRMLException

Notification of the start of a node. This is the opening statement of a node and it's DEF name. USE declarations are handled in a separate method.

Specified by:

startNode in interface ContentHandler

Parameters:

name - The name of the node that we are about to parse

defName - The string associated with the DEF name. Null if not given for this node.

Throws:

SAVException - This call is taken at the wrong time in the structure of the document

VRMLException - The content provided is invalid for this part of the document or can't be parsed

endNode

public void endNode()
             throws SAVException,
VRMLException

Notification of the end of a node declaration.

Specified by:

endNode in interface ContentHandler

Throws:

SAVException - This call is taken at the wrong time in the structure of the document

VRMLException - The content provided is invalid for this part of the document or can't be parsed

startField

public void startField(String name)
                throws SAVException,
VRMLException

Notification of a field declaration. This notification is only called if it is a standard node. If the node is a script or PROTO declaration then the ScriptHandler or ProtoHandler methods are used.

Specified by:

startField in interface ContentHandler

Parameters:

name - The name of the field declared

Throws:

SAVException - This call is taken at the wrong time in the structure of the document

VRMLException - The content provided is invalid for this part of the document or can't be parsed

fieldValue

public void fieldValue(String value)
                throws SAVException,
VRMLException

The value of a normal field. This is a string that represents the entire value of the field. MFStrings will have to be parsed. This is a terminating call for startField as well. The next call will either be another startField() or endNode().

If this field is an SFNode with a USE declaration you will have the useDecl(String) method called rather than this method.

Specified by:

fieldValue in interface BinaryContentHandler

Specified by:

fieldValue in interface StringContentHandler

Parameters:

value - The value of this field

Throws:

SAVException - This call is taken at the wrong time in the structure of the document

VRMLException - The content provided is invalid for this part of the document or can't be parsed

fieldValue

public void fieldValue(String[] values)
                throws SAVException,
VRMLException

The value of an MFField where the underlying parser knows about how the values are broken up. The parser is not required to support this callback, but implementors of this interface should understand it. The most likely time we will have this method called is for MFString or URL lists. If called, it is guaranteed to split the strings along the SF node type boundaries.

Specified by:

fieldValue in interface StringContentHandler

Parameters:

values - The list of string representing the values

Throws:

SAVException - This call is taken at the wrong time in the structure of the document

VRMLException - The content provided is invalid for this part of the document or can't be parsed

useDecl

public void useDecl(String defName)
             throws SAVException,
VRMLException

The field value is a USE for the given node name. This is a terminating call for startField as well. The next call will either be another startField() or endNode().

Specified by:

useDecl in interface ContentHandler

Parameters:

defName - The name of the DEF string to use

Throws:

SAVException - This call is taken at the wrong time in the structure of the document

VRMLException - The content provided is invalid for this part of the document or can't be parsed

endField

public void endField()
              throws SAVException,
VRMLException

Notification of the end of a field declaration. This is called only at the end of an MFNode declaration. All other fields are terminated by either useDecl(String) or fieldValue(String).

Specified by:

endField in interface ContentHandler

Throws:

SAVException - This call is taken at the wrong time in the structure of the document

VRMLException - The content provided is invalid for this part of the document or can't be parsed

fieldValue

public void fieldValue(int value)
                throws SAVException,
VRMLException

Set the value of the field at the given index as an integer. This would be used to set SFInt32 field types.

Specified by:

fieldValue in interface BinaryContentHandler

Parameters:

value - The new value to use for the node

Throws:

SAVException - This call is taken at the wrong time in the structure of the document.

VRMLException - This call is taken at the wrong time in the structure of the document.

fieldValue

public void fieldValue(int[] value,
 int len)
                throws SAVException,
VRMLException

Set the value of the field at the given index as an array of integers. This would be used to set MFInt32 field types.

Specified by:

fieldValue in interface BinaryContentHandler

Parameters:

value - The new value to use for the node

len - The number of valid entries in the value array

Throws:

SAVException - This call is taken at the wrong time in the structure of the document.

VRMLException - This call is taken at the wrong time in the structure of the document.

fieldValue

public void fieldValue(boolean value)
                throws SAVException,
VRMLException

Set the value of the field at the given index as an boolean. This would be used to set SFBool field types.

Specified by:

fieldValue in interface BinaryContentHandler

Parameters:

value - The new value to use for the node

Throws:

SAVException - This call is taken at the wrong time in the structure of the document.

VRMLException - This call is taken at the wrong time in the structure of the document.

fieldValue

public void fieldValue(boolean[] value,
 int len)
                throws SAVException,
VRMLException

Set the value of the field at the given index as an array of boolean. This would be used to set MFBool field types.

Specified by:

fieldValue in interface BinaryContentHandler

Parameters:

value - The new value to use for the node

len - The number of valid entries in the value array

Throws:

SAVException - This call is taken at the wrong time in the structure of the document.

VRMLException - This call is taken at the wrong time in the structure of the document.

fieldValue

public void fieldValue(float value)
                throws SAVException,
VRMLException

Set the value of the field at the given index as a float. This would be used to set SFFloat field types.

Specified by:

fieldValue in interface BinaryContentHandler

Parameters:

value - The new value to use for the node

Throws:

SAVException - This call is taken at the wrong time in the structure of the document.

VRMLException - This call is taken at the wrong time in the structure of the document.

fieldValue

public void fieldValue(float[] value,
 int len)
                throws SAVException,
VRMLException

Set the value of the field at the given index as an array of floats. This would be used to set MFFloat, SFVec2f, SFVec3f and SFRotation field types.

Specified by:

fieldValue in interface BinaryContentHandler

Parameters:

value - The new value to use for the node

len - The number of valid entries in the value array

Throws:

SAVException - This call is taken at the wrong time in the structure of the document.

VRMLException - This call is taken at the wrong time in the structure of the document.

fieldValue

public void fieldValue(long value)
                throws SAVException,
VRMLException

Set the value of the field at the given index as an long. This would be used to set SFTime field types.

Specified by:

fieldValue in interface BinaryContentHandler

Parameters:

value - The new value to use for the node

Throws:

SAVException - This call is taken at the wrong time in the structure of the document.

VRMLException - This call is taken at the wrong time in the structure of the document.

fieldValue

public void fieldValue(long[] value,
 int len)
                throws SAVException,
VRMLException

Set the value of the field at the given index as an array of longs. This would be used to set MFTime field types.

Specified by:

fieldValue in interface BinaryContentHandler

Parameters:

value - The new value to use for the node

len - The number of valid entries in the value array

Throws:

SAVException - This call is taken at the wrong time in the structure of the document.

VRMLException - This call is taken at the wrong time in the structure of the document.

fieldValue

public void fieldValue(double value)
                throws SAVException,
VRMLException

Set the value of the field at the given index as an double. This would be used to set SFDouble field types.

Specified by:

fieldValue in interface BinaryContentHandler

Parameters:

value - The new value to use for the node

Throws:

SAVException - This call is taken at the wrong time in the structure of the document.

VRMLException - This call is taken at the wrong time in the structure of the document.

fieldValue

public void fieldValue(double[] value,
 int len)
                throws SAVException,
VRMLException

Set the value of the field at the given index as an array of doubles. This would be used to set MFDouble, SFVec2d and SFVec3d field types.

Specified by:

fieldValue in interface BinaryContentHandler

Parameters:

value - The new value to use for the node

len - The number of valid entries in the value array

Throws:

SAVException - This call is taken at the wrong time in the structure of the document.

VRMLException - This call is taken at the wrong time in the structure of the document.

fieldValue

public void fieldValue(String[] value,
 int len)
                throws SAVException,
VRMLException

Set the value of the field at the given index as an array of strings. This would be used to set MFString field types.

Specified by:

fieldValue in interface BinaryContentHandler

Parameters:

value - The new value to use for the node

len - The number of valid entries in the value array

Throws:

SAVException - This call is taken at the wrong time in the structure of the document.

VRMLException - This call is taken at the wrong time in the structure of the document.

startProtoDecl

public void startProtoDecl(String name)
                    throws SAVException,
VRMLException

Notification of the start of an ordinary (inline) proto declaration. The proto has the given node name.

Specified by:

startProtoDecl in interface ProtoHandler

Parameters:

name - The name of the proto

Throws:

SAVException - This call is taken at the wrong time in the structure of the document

VRMLException - The content provided is invalid for this part of the document or can't be parsed

endProtoDecl

public void endProtoDecl()
                  throws SAVException,
VRMLException

Notification of the end of an ordinary proto declaration statement.

Specified by:

endProtoDecl in interface ProtoHandler

Throws:

SAVException - This call is taken at the wrong time in the structure of the document

VRMLException - The content provided is invalid for this part of the document or can't be parsed

protoFieldDecl

public void protoFieldDecl(int access,
 String type,
 String name,
 Object value)
                    throws SAVException,
VRMLException

Notification of a proto's field declaration. This is used for both external and ordinary protos. Externprotos don't allow the declaration of a value for the field. In this case, the parameter value will be null.

Specified by:

protoFieldDecl in interface ProtoHandler

Parameters:

access - The access type (eg exposedField, field etc)

type - The field type (eg SFInt32, MFVec3d etc)

name - The name of the field

value - The default value of the field. Null if not allowed.

Throws:

SAVException - This call is taken at the wrong time in the structure of the document

VRMLException - The content provided is invalid for this part of the document or can't be parsed

protoIsDecl

public void protoIsDecl(String fieldName)
                 throws SAVException,
VRMLException

Notification of a field value uses an IS statement. If we are running in VRML97 mode, this will throw an exception if the field access types do not match.

Specified by:

protoIsDecl in interface ProtoHandler

Parameters:

fieldName - The name of the field that is being IS'd

Throws:

SAVException - This call is taken at the wrong time in the structure of the document

VRMLException - The content provided is invalid for this part of the document or can't be parsed

startProtoBody

public void startProtoBody()
                    throws SAVException,
VRMLException

Notification of the start of an ordinary proto body. All nodes contained between here and the corresponding endProtoBody() statement form the body and not the normal scene graph information.

Specified by:

startProtoBody in interface ProtoHandler

Throws:

SAVException - This call is taken at the wrong time in the structure of the document

VRMLException - The content provided is invalid for this part of the document or can't be parsed

endProtoBody

public void endProtoBody()
                  throws SAVException,
VRMLException

Notification of the end of an ordinary proto body. Parsing now returns to ordinary node declarations.

Specified by:

endProtoBody in interface ProtoHandler

Throws:

SAVException - This call is taken at the wrong time in the structure of the document

VRMLException - The content provided is invalid for this part of the document or can't be parsed

startExternProtoDecl

public void startExternProtoDecl(String name)
                          throws SAVException,
VRMLException

Notification of the start of an EXTERNPROTO declaration of the given name. Between here and the matching endExternProtoDecl() call you should only receive protoFieldDecl(int, java.lang.String, java.lang.String, java.lang.Object) calls.

Specified by:

startExternProtoDecl in interface ProtoHandler

Parameters:

name - The node name of the extern proto

Throws:

SAVException - This call is taken at the wrong time in the structure of the document

VRMLException - The content provided is invalid for this part of the document or can't be parsed

endExternProtoDecl

public void endExternProtoDecl()
                        throws SAVException,
VRMLException

Notification of the end of an EXTERNPROTO declaration.

Specified by:

endExternProtoDecl in interface ProtoHandler

Throws:

SAVException - This call is taken at the wrong time in the structure of the document

VRMLException - The content provided is invalid for this part of the document or can't be parsed

externProtoURI

public void externProtoURI(String[] values)
                    throws SAVException,
VRMLException

Notification of the URI list for an EXTERNPROTO. This is a complete list of URIs. The calling application is required to interpet the incoming strings. Even if the externproto has no URIs registered, this method shall be called. If there are none available, this will be called with a zero length list of values.

Specified by:

externProtoURI in interface ProtoHandler

Parameters:

values - A list of strings representing all of the URI values

Throws:

SAVException - This call is taken at the wrong time in the structure of the document

VRMLException - The content provided is invalid for this part of the document or can't be parsed

startScriptDecl

public void startScriptDecl()
                     throws SAVException,
VRMLException

Notification of the start of a script declaration. All calls between now and the corresponding endScriptDecl() call belong to this script node. This method will be called after the ContentHandler startNode() method call. All DEF information is contained in that method call and this just signifies the start of script processing so that we know to treat the field parsing callbacks a little differently.

Specified by:

startScriptDecl in interface ScriptHandler

Throws:

SAVException - This call is taken at the wrong time in the structure of the document

VRMLException - The content provided is invalid for this part of the document or can't be parsed

endScriptDecl

public void endScriptDecl()
                   throws SAVException,
VRMLException

Notification of the end of a script declaration. This is guaranteed to be called before the ContentHandler endNode() callback.

Specified by:

endScriptDecl in interface ScriptHandler

Throws:

SAVException - This call is taken at the wrong time in the structure of the document

VRMLException - The content provided is invalid for this part of the document or can't be parsed

scriptFieldDecl

public void scriptFieldDecl(int access,
 String type,
 String name,
 Object value)
                     throws SAVException,
VRMLException

Notification of a script's field declaration. This is used for all fields except url, mustEvaluate and directOutput fields. These fields use the normal field callbacks of ContentHandler.

Specified by:

scriptFieldDecl in interface ScriptHandler

Parameters:

access - The access type (eg exposedField, field etc)

type - The field type (eg SFInt32, MFVec3d etc)

name - The name of the field

value - The default value of the field

Throws:

SAVException - This call is taken at the wrong time in the structure of the document

VRMLException - The content provided is invalid for this part of the document or can't be parsed

routeDecl

public void routeDecl(String srcNodeName,
 String srcFieldName,
 String destNodeName,
 String destFieldName)
               throws SAVException,
VRMLException

Notification of a ROUTE declaration in the file. The context of this route should be assumed from the surrounding calls to start and end of proto and node bodies.

Specified by:

routeDecl in interface RouteHandler

Parameters:

srcNodeName - The name of the DEF of the source node

srcFieldName - The name of the field to route values from

destNodeName - The name of the DEF of the destination node

destFieldName - The name of the field to route values to

Throws:

SAVException - This call is taken at the wrong time in the structure of the document

VRMLException - The content provided is invalid for this part of the document or can't be parsed

setLoadRequirements

public void setLoadRequirements(boolean useBackgrounds,
 boolean useFogs,
 boolean useLights,
 boolean useAudio,
 boolean useViewpoints,
 boolean useExternals)

Set the flags about what to load. The flags defined here are matched by the Java 3D Loader Nodes defined as externals are inlines and extern protos. This method should be called after the allowVRML97Only(boolean) method as it uses that flag.

Parameters:

useBackgrounds - true if BackgroundNodeTypes should be loaded

useFogs - true if FogNodeTypes should be loaded

useLights - true if LightNodeTypes should be loaded

useAudio - true if AudioClipNodeTypes should be loaded

useViewpoints - true if ViewpointNodeTypes should loaded

useExternals - true if ExternalNodeTypes should be loaded