SoSwitch Class Reference

Group node that traverses one chosen child. More...

#include <Inventor/nodes/SoSwitch.h>

Inheritance diagram for SoSwitch:

Public Member Functions
virtual SoType	getTypeId () const
	Returns the type identifier for this specific instance.
	SoSwitch ()
	Creates a switch node with default settings.
	SoSwitch (int nChildren)
	Constructor that takes approximate number of children.
Public Member Functions inherited from SoGroup
	SoGroup ()
	Creates an empty group node.
	SoGroup (int nChildren)
	Constructor that takes approximate number of children.
virtual void	addChild (SoNode *child)
	Adds a child as last one in group.
virtual void	insertChild (SoNode *child, int newChildIndex)
	Adds a child so that it becomes the one with the given index.
virtual SoNode *	getChild (int index) const
	Returns pointer the child node with the given index.
virtual int	findChild (const SoNode *child) const
	Finds index of given child within group.
virtual int	getNumChildren () const
	Returns number of children.
virtual void	removeChild (int index)
	Removes child with given index from group.
virtual void	removeChild (SoNode *child)
	Removes first instance of given child from group.
virtual void	removeAllChildren ()
	Removes all children from group.
virtual void	replaceChild (int index, SoNode *newChild)
	Replaces child with given index with new child.
virtual void	replaceChild (SoNode *oldChild, SoNode *newChild)
	Replaces first instance of given child with new child.
Public Member Functions inherited from SoNode
virtual void	setOverride (const SbBool state)
	Turns the override flag on or off.
virtual SbBool	isOverride () const
	Returns the state of the override flag.
virtual SoNode *	copy (SbBool copyConnections=FALSE) const
	Creates and returns an exact copy of the node.
virtual void	touch ()
	Marks an instance as modified, simulating a change to it.
Public Member Functions inherited from SoFieldContainer
void	setToDefaults ()
	Sets all fields in this object to their default values.
SbBool	hasDefaultValues () const
	Returns TRUE if all of the object's fields have their default values.
SbBool	fieldsAreEqual (const SoFieldContainer *fc) const
	Returns TRUE if this object's fields are exactly equal to fc's fields.
void	copyFieldValues (const SoFieldContainer *fc, SbBool copyConnections=FALSE)
	Copies the contents of fc's fields into this object's fields.
SoNONUNICODE SbBool	set (const char *fieldDataString)
	Sets one or more fields in this object to the values specified in the given string, which should be a string in the Open Inventor file format.
SbBool	set (const SbString &fieldDataString)
	Sets one or more fields in this object to the values specified in the given string, which should be a string in the Open Inventor file format.
void	get (SbString &fieldDataString)
	Returns the values of the fields of this object in the Open Inventor ASCII file format in the given string.
virtual int	getFields (SoFieldList &list) const
	Appends references to all of this object's fields to resultList, and returns the number of fields appended.
virtual int	getAllFields (SoFieldList &list) const
	Returns a list of fields, including the eventIn's and eventOut's.
virtual SoField *	getField (const SbName &fieldName) const
	Returns a the field of this object whose name is fieldName.
virtual SoField *	getEventIn (const SbName &fieldName) const
	Returns a the eventIn with the given name.
virtual SoField *	getEventOut (const SbName &fieldName) const
	Returns the eventOut with the given name.
SbBool	getFieldName (const SoField *field, SbName &fieldName) const
	Returns the name of the given field in the fieldName argument.
SbBool	enableNotify (SbBool flag)
	Notification at this Field Container is enabled (if flag == TRUE) or disabled (if flag == FALSE).
SbBool	isNotifyEnabled () const
	Notification is the process of telling interested objects that this object has changed.
virtual void	setUserData (void *data)
	Sets application data.
void *	getUserData (void) const
	Gets user application data.
Public Member Functions inherited from SoBase
virtual SbName	getName () const
	Returns the name of an instance.
virtual void	setName (const SbName &name)
	Sets the name of an instance.
void	setSynchronizable (const bool b)
	Sets this to be a ScaleViz synchronizable object.
bool	isSynchronizable () const
	Gets the ScaleViz synchronizable state of this object.
Public Member Functions inherited from SoRefCounter
void	ref () const
	Adds a reference to an instance.
void	unref () const
	Removes a reference from an instance.
void	unrefNoDelete () const
	unrefNoDelete() should be called when it is desired to decrement the reference count, but not delete the instance if this brings the reference count to zero.
int	getRefCount () const
	Returns current reference count.
void	lock () const
	lock this instance.
void	unlock () const
	unlock this instance.
Public Member Functions inherited from SoTypedObject
SbBool	isOfType (const SoType &type) const
	Returns TRUE if this object is of the type specified in type or is derived from that type.
template<typename TypedObjectClass >
SbBool	isOfType () const
	Returns TRUE if this object is of the type of class TypedObjectClass or is derived from that class.

Static Public Member Functions
static SoType	getClassTypeId ()
	Returns the type identifier for this class.
Static Public Member Functions inherited from SoGroup
static SoType	getClassTypeId ()
	Returns the type identifier for this class.
Static Public Member Functions inherited from SoNode
static SoType	getClassTypeId ()
	Returns the type identifier for this class.
static SoNode *	getByName (const SbName &name)
	A node's name can be set using SoBase::setName().
static int	getByName (const SbName &name, SoNodeList &list)
	A node's name can be set using SoBase::setName().
Static Public Member Functions inherited from SoFieldContainer
static SoType	getClassTypeId ()
	Returns the type of this class.
Static Public Member Functions inherited from SoBase
static SoType	getClassTypeId ()
	Returns type identifier for this class.
Static Public Member Functions inherited from SoTypedObject
static SoType	getClassTypeId ()
	Returns the type identifier for this class.

Public Attributes
SoSFInt32	whichChild
	Index of the child to traverse, or one of SO_SWITCH_NONE, SO_SWITCH_INHERIT, or SO_SWITCH_ALL.
Public Attributes inherited from SoGroup
SoSFBool	boundingBoxIgnoring
	Whether to ignore this node during bounding box traversal.

Related Symbols
(Note that these are not member symbols.)
#define	SO_SWITCH_NONE   (-1)
	Possible value of SoSwitch::whichChild : Don't traverse any children.
#define	SO_SWITCH_INHERIT   (-2)
	Possible value of SoSwitch::whichChild : Inherit value from state.
#define	SO_SWITCH_ALL   (-3)
	Possible value of SoSwitch::whichChild : Traverse all children.

Detailed Description

Group node that traverses one chosen child.

This group node traverses exactly one, none or all of its children. It implements an operation similar to the switch statement in C. One can use this node to switch on and off the effects of some properties, to switch between different properties, to switch between different geometry or to control the visibility of geometry.

The whichChild field specifies the index of the child to traverse, where the first child has index 0. There are several special values that can be used:

• SO_SWITCH_NONE (-1, the default) means do not traverse any children.
• SO_SWITCH_INHERIT (-2) allows the index to be inherited from a previously-encountered SoSwitch node or from certain other nodes (such as SoArray or SoMultipleCopy) that set the switch value.
• SO_SWITCH_ALL (-3) traverses all children, making the switch behave exactly like a regular SoGroup.

There are several extended versions of this node with additional/different behavior:

• SoInteractiveSwitch: During a user interaction, for example moving the camera, traverses a different (or no) child specified by its whichInteractiveChild field.
• SoMultiSwitch: Traverses any number of its children (specified in a list of indices).
• SoPathSwitch: Only traverses its children if the current path (when it is traversed) matches or contains a path specified in its path field.
• SoMultiPathSwitch: Only traverses its children if the current path matches or contains any of the paths specified in its paths field.

NOTES:

• The default value for whichChild is SO_SWITCH_NONE, meaning that nothing is displayed by default. In most cases you will want to set some other initial value in this field.
• When the value of whichChild is SO_SWITCH_INHERIT, if the inherited value is larger than the number of children in the current node, the actual value used is "modulo" the number of children.
• Some actions have an option that allows them to ignore the value of whichChild. For example, calling setSearchingAll(true) on an SoSearchAction causes it to traverse all the children of SoSwitch nodes.
• SoSwitch is commonly used to control the visibility of a geometry. For example an application might allow the user to create multiple slices through a volume (SoOrthoSlice) or mesh (MoLogicalSlice) data set, but also allow the user to control the visibility of each slice separately. Using SoSwitch with SO_SWITCH_NONE is much more efficient than removing geometry from the scene graph because previously built caches are preserved. Using SoSwitch is also much more efficient than using draw style INVISIBLE (SoDrawStyle) because the children are not traversed.
• This node is an SoGroup, not an SoSeparator, and therefore does not provide render caching. Generally if the children contain geometry, it is good practice to make each child an SoSeparator to make render caching more effective.

FILE FORMAT/DEFAULT

Switch {

whichChild

-1

}

ACTION BEHAVIOR

SoGLRenderAction, SoCallbackAction, SoGetBoundingBoxAction, SoGetMatrixAction, SoHandleEventAction, SoRayPickAction
Traverses the chosen child or children. Sets: SoSwitchElement

SoSearchAction
If the action's Searching-All flag is set, always traverses all children. Otherwise, traverses just the chosen child or children.

SEE ALSO

SoArray, SoLevelOfDetail, SoMultipleCopy, SoPathSwitch, SoMultiSwitch, SoInteractiveSwitch

Definition at line 178 of file SoSwitch.h.

Constructor & Destructor Documentation

SoSwitch() [1/2]

SoSwitch::SoSwitch

(

)

Creates a switch node with default settings.

SoSwitch() [2/2]

SoSwitch::SoSwitch

(

int

nChildren

)

Constructor that takes approximate number of children.

Member Function Documentation

getClassTypeId()

static SoType SoSwitch::getClassTypeId ( )

static

Returns the type identifier for this class.

getTypeId()

virtual SoType SoSwitch::getTypeId ( ) const

virtual

Returns the type identifier for this specific instance.

Reimplemented from SoGroup.

Reimplemented in SoBlinker, and SoInteractiveSwitch.

Friends And Related Symbol Documentation

SO_SWITCH_ALL

#define SO_SWITCH_ALL   (-3)

related

Possible value of SoSwitch::whichChild : Traverse all children.

Definition at line 87 of file SoSwitch.h.

SO_SWITCH_INHERIT

#define SO_SWITCH_INHERIT   (-2)

related

Possible value of SoSwitch::whichChild : Inherit value from state.

Definition at line 80 of file SoSwitch.h.

SO_SWITCH_NONE

#define SO_SWITCH_NONE   (-1)

related

Possible value of SoSwitch::whichChild : Don't traverse any children.

Definition at line 73 of file SoSwitch.h.

Member Data Documentation

whichChild

SoSFInt32 SoSwitch::whichChild

Index of the child to traverse, or one of SO_SWITCH_NONE, SO_SWITCH_INHERIT, or SO_SWITCH_ALL.

Definition at line 190 of file SoSwitch.h.

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The documentation for this class was generated from the following file:

• Inventor/nodes/SoSwitch.h