The SoSwitch class is a group node which selects one child subgraph for traversal. More...

#include <Inventor/nodes/SoSwitch.h>

Inheritance diagram for SoSwitch:

Public Member Functions
	SoSwitch (int numchildren)

	SoSwitch (void)

virtual SbBool	affectsState (void) const

virtual void	audioRender (SoAudioRenderAction *action)

virtual void	callback (SoCallbackAction *action)

virtual void	doAction (SoAction *action)

virtual void	getBoundingBox (SoGetBoundingBoxAction *action)

virtual void	getMatrix (SoGetMatrixAction *action)

virtual void	getPrimitiveCount (SoGetPrimitiveCountAction *action)

virtual SoType	getTypeId (void) const

virtual void	GLRender (SoGLRenderAction *action)

virtual void	handleEvent (SoHandleEventAction *action)

virtual void	notify (SoNotList *nl)

virtual void	pick (SoPickAction *action)

virtual void	search (SoSearchAction *action)

virtual void	write (SoWriteAction *action)

Public Member Functions inherited from SoGroup
	SoGroup (int nchildren)

	SoGroup (void)

virtual void	addChild (SoNode *node)

virtual void	addWriteReference (SoOutput *out, SbBool isfromfield=FALSE)

virtual int	findChild (const SoNode *node) const

virtual SoNode *	getChild (int index) const

virtual SoChildList *	getChildren (void) const

virtual int	getNumChildren (void) const

virtual void	insertChild (SoNode *child, int newchildindex)

virtual void	removeAllChildren (void)

virtual void	removeChild (int childindex)

virtual void	removeChild (SoNode *child)

virtual void	replaceChild (int index, SoNode *newchild)

virtual void	replaceChild (SoNode oldchild, SoNode newchild)

Public Member Functions inherited from SoNode
virtual SoNode *	addToCopyDict (void) const

virtual SoNode *	copy (SbBool copyconnections=FALSE) const

virtual SoFieldContainer *	copyThroughConnection (void) const

SbUniqueId	getNodeId (void) const

NodeType	getNodeType (void) const

virtual void	GLRenderBelowPath (SoGLRenderAction *action)

virtual void	GLRenderInPath (SoGLRenderAction *action)

virtual void	GLRenderOffPath (SoGLRenderAction *action)

virtual void	grabEventsCleanup (void)

virtual void	grabEventsSetup (void)

SbBool	isOverride (void) const

virtual void	rayPick (SoRayPickAction *action)

void	setNodeType (const NodeType type)

void	setOverride (const SbBool state)

virtual void	startNotify (void)

virtual void	writeInstance (SoOutput *out)

Public Member Functions inherited from SoFieldContainer
void	copyFieldValues (const SoFieldContainer *container, SbBool copyconnections=FALSE)

SbBool	enableNotify (const SbBool flag)

SbBool	fieldsAreEqual (const SoFieldContainer *container) const

void	get (SbString &fielddata)

void	get (SbString &fielddata, SoOutput *out)

virtual int	getAllFields (SoFieldList &l) const

virtual SoField *	getEventIn (const SbName &name) const

virtual SoField *	getEventOut (const SbName &name) const

virtual SoField *	getField (const SbName &name) const

SbBool	getFieldName (const SoField *const field, SbName &name) const

virtual int	getFields (SoFieldList &l) const

virtual void	getFieldsMemorySize (size_t &managed, size_t &unmanaged) const

SbBool	getIsBuiltIn (void) const

void *	getUserData (void) const

SbBool	hasDefaultValues (void) const

SbBool	isNotifyEnabled (void) const

SbBool	set (const char *const fielddata)

SbBool	set (const char fielddata, SoInput input)

void	setToDefaults (void)

void	setUserData (void *userdata) const

virtual SbBool	validateNewFieldValue (SoField field, void newval)

Public Member Functions inherited from SoBase
void	addAuditor (void *const auditor, const SoNotRec::Type type)

void	assertAlive (void) const

const SoAuditorList &	getAuditors (void) const

virtual SbName	getName (void) const

int32_t	getRefCount (void) const

SbBool	isOfType (SoType type) const
	Returns `TRUE` if the type of this object is either of the same type or inherited from type.

void	ref (void) const

void	removeAuditor (void *const auditor, const SoNotRec::Type type)

virtual void	setName (const SbName &newname)

SbBool	shouldWrite (void)

void	touch (void)

void	unref (void) const

void	unrefNoDelete (void) const

Static Public Member Functions
static SoType	getClassTypeId (void)

static void	initClass (void)
	Sets up initialization for data common to all instances of this class, like submitting necessary information to the Coin type system.

Static Public Member Functions inherited from SoGroup
static SoType	getClassTypeId (void)

static void	initClass (void)
	Sets up initialization for data common to all instances of this class, like submitting necessary information to the Coin type system.

Static Public Member Functions inherited from SoNode
static void	audioRenderS (SoAction action, SoNode node)

static void	callbackS (SoAction action, SoNode node)

static int	getActionMethodIndex (const SoType type)

static void	getBoundingBoxS (SoAction action, SoNode node)

static SoNode *	getByName (const SbName &name)

static int	getByName (const SbName &name, SoNodeList &l)

static SoType	getClassTypeId (void)

static uint32_t	getCompatibilityTypes (const SoType &nodetype)

static void	getMatrixS (SoAction action, SoNode node)

static SbUniqueId	getNextNodeId (void)

static void	getPrimitiveCountS (SoAction action, SoNode node)

static void	GLRenderS (SoAction action, SoNode node)

static void	handleEventS (SoAction action, SoNode node)

static void	initClass (void)
	Sets up initialization for data common to all instances of this class, like submitting necessary information to the Coin type system.

static void	initClasses (void)

static void	pickS (SoAction action, SoNode node)

static void	rayPickS (SoAction action, SoNode node)

static void	searchS (SoAction action, SoNode node)

static void	writeS (SoAction action, SoNode node)

Static Public Member Functions inherited from SoFieldContainer
static void	addCopy (const SoFieldContainer orig, const SoFieldContainer copy)

static SoFieldContainer *	checkCopy (const SoFieldContainer *orig)

static void	cleanupClass (void)

static void	copyDone (void)

static SoFieldContainer *	findCopy (const SoFieldContainer *orig, const SbBool copyconnections)

static SoType	getClassTypeId (void)
	This static method returns the SoType object associated with objects of this class.

static void	initClass (void)
	Sets up initialization for data common to all instances of this class, like submitting necessary information to the Coin type system.

static void	initCopyDict (void)

Static Public Member Functions inherited from SoBase
static void	addName (SoBase const base, const char const name)

static SbBool	connectRoute (SoInput *input, const SbName &fromnodename, const SbName &fromfieldname, const SbName &tonodename, const SbName &tofieldname)

static void	decrementCurrentWriteCounter (void)

static SoType	getClassTypeId (void)
	This static method returns the SoType object associated with objects of this class.

static SoBase *	getNamedBase (const SbName &name, SoType type)

static int	getNamedBases (const SbName &name, SoBaseList &baselist, SoType type)

static SbBool	getTraceRefs (void)

static void	incrementCurrentWriteCounter (void)

static void	initClass (void)
	Sets up initialization for data common to all instances of this class, like submitting necessary information to the Coin type system.

static SbBool	read (SoInput input, SoBase &base, SoType expectedtype)

static SbBool	readRoute (SoInput *input)

static void	removeName (SoBase const base, const char const name)

static void	setInstancePrefix (const SbString &c)

static void	setTraceRefs (SbBool trace)

Public Attributes
SoSFInt32	whichChild

Protected Member Functions
virtual	~SoSwitch ()

virtual const SoFieldData *	getFieldData (void) const

void	traverseChildren (SoAction *action)

Protected Member Functions inherited from SoGroup
virtual	~SoGroup ()

virtual void	copyContents (const SoFieldContainer *from, SbBool copyconnections)

virtual SoNotRec	createNotRec (void)

virtual SbBool	readChildren (SoInput *in)

virtual SbBool	readInstance (SoInput *in, unsigned short flags)

void	setOperation (const SoNotRec::OperationType opType=SoNotRec::UNSPECIFIED, const SoNode cc=NULL, const SoNode pc=NULL, const int ci=-1)

Protected Member Functions inherited from SoNode
	SoNode (void)

virtual	~SoNode ()

Protected Member Functions inherited from SoFieldContainer
	SoFieldContainer (void)

virtual	~SoFieldContainer ()

Protected Member Functions inherited from SoBase
	SoBase (void)

virtual	~SoBase ()

virtual void	destroy (void)

virtual const char *	getFileFormatName (void) const

SbBool	hasMultipleWriteRefs (void) const

void	writeFooter (SoOutput *out) const

SbBool	writeHeader (SoOutput *out, SbBool isgroup, SbBool isengine) const

Static Protected Member Functions
static const SoFieldData **	getFieldDataPtr (void)

Static Protected Member Functions inherited from SoGroup
static const SoFieldData **	getFieldDataPtr (void)

Static Protected Member Functions inherited from SoNode
static const SoFieldData **	getFieldDataPtr (void)

static int	getNextActionMethodIndex (void)

static void	incNextActionMethodIndex (void)

static void	setCompatibilityTypes (const SoType &nodetype, const uint32_t bitmask)

static void	setNextActionMethodIndex (int index)

Static Protected Member Functions inherited from SoBase
static uint32_t	getCurrentWriteCounter (void)

static void	staticDataLock (void)

static void	staticDataUnlock (void)

Additional Inherited Members
Public Types inherited from SoNode
enum	NodeType { INVENTOR = 0x0000 , VRML1 = 0x0001 , VRML2 = 0x0002 , INVENTOR_1 = 0x0004 , INVENTOR_2_0 = 0x0008 , INVENTOR_2_1 = 0x0010 , INVENTOR_2_5 = 0x0020 , INVENTOR_2_6 = 0x0040 , COIN_1_0 = 0x0080 , COIN_2_0 = 0x0100 , EXTENSION = 0x0200 , COIN_2_2 = 0x0400 , COIN_2_3 = 0x0800 , COIN_2_4 = 0x1000 , INVENTOR_5_0 = 0x2000 , COIN_2_5 = 0x4000 , COIN_3_0 = 0x8000 , INVENTOR_6_0 = 0x10000 , COIN_4_0 = 0x20000 }

Protected Types inherited from SoBase
enum	BaseFlags { IS_ENGINE = 0x01 , IS_GROUP = 0x02 }

Protected Attributes inherited from SoGroup
SoChildList *	children

Protected Attributes inherited from SoNode
SbUniqueId	uniqueId

Protected Attributes inherited from SoFieldContainer
SbBool	isBuiltIn

Static Protected Attributes inherited from SoNode
static int	nextActionMethodIndex = 0

static SbUniqueId	nextUniqueId = 1

Detailed Description

The SoSwitch class is a group node which selects one child subgraph for traversal.

Which child to traverse is controlled by the application programmer by using the SoSwitch::whichChild field. In addition to picking out a single child for traversal, it is also possible to flip all children on or off for traversal.

This node is very useful for conditionally turning on or off parts of the scene graph based on the current application processing mode, visualizing mode, or whatever else the application can do.

FILE FORMAT/DEFAULTS:

Switch {
    whichChild -1
}

Constructor & Destructor Documentation

◆ SoSwitch() [1/2]

SoSwitch::SoSwitch ( void )

Default constructor.

◆ SoSwitch() [2/2]

SoSwitch::SoSwitch ( int numchildren )

Constructor.

The argument should be the approximate number of children which is expected to be inserted below this node. The number need not be exact, as it is only used as a hint for better memory resource allocation.

◆ ~SoSwitch()

SoSwitch::~SoSwitch ( )

protectedvirtual

Destructor.

Member Function Documentation

◆ affectsState()

SbBool SoSwitch::affectsState ( void ) const

virtual

Returns TRUE if the node could have any effect on the state during traversal.

If it returns FALSE, no data in the traversal state will change from the pre-traversal state to the post-traversal state. The SoSeparator node will for instance return FALSE, as it pushes and pops the state before and after traversal of its children. All SoShape nodes will also return FALSE, as just pushing out geometry data to the rendering engine won't affect the actual rendering state.

The default method returns TRUE, on a "better safe than sorry" philosophy.

Reimplemented from SoNode.

◆ audioRender()

void SoSwitch::audioRender ( SoAudioRenderAction * action )

virtual

Action method for SoAudioRenderAction.

Does common processing for SoAudioRenderAction action instances.

Reimplemented from SoGroup.

◆ callback()

void SoSwitch::callback ( SoCallbackAction * action )

virtual

Action method for SoCallbackAction.

Simply updates the state according to how the node behaves for the render action, so the application programmer can use the SoCallbackAction for extracting information about the scene graph.

Reimplemented from SoGroup.

◆ doAction()

void SoSwitch::doAction ( SoAction * action )

virtual

This function performs the typical operation of a node for any action.

Reimplemented from SoGroup.

◆ getBoundingBox()

void SoSwitch::getBoundingBox ( SoGetBoundingBoxAction * action )

virtual

Action method for the SoGetBoundingBoxAction.

Calculates bounding box and center coordinates for node and modifies the values of the action to encompass the bounding box for this node and to shift the center point for the scene more towards the one for this node.

Nodes influencing how geometry nodes calculate their bounding box also override this method to change the relevant state variables.

Reimplemented from SoGroup.

Reimplemented in SoBlinker.

◆ getClassTypeId()

SoType SoSwitch::getClassTypeId ( void )

static

This static method returns the SoType object associated with objects of this class.

◆ getFieldData()

const SoFieldData * SoSwitch::getFieldData ( void ) const

protectedvirtual

Returns a pointer to the class-wide field data storage object for this instance. If no fields are present, returns NULL.

Reimplemented from SoGroup.

Reimplemented in SoBlinker.

◆ getFieldDataPtr()

const SoFieldData ** SoSwitch::getFieldDataPtr ( void )

staticprotected

This API member is considered internal to the library, as it is not likely to be of interest to the application programmer.

Returns the SoFieldData class which holds information about fields in this node.

◆ getMatrix()

void SoSwitch::getMatrix ( SoGetMatrixAction * action )

virtual

Action method for SoGetMatrixAction.

Updates action by accumulating with the transformation matrix of this node (if any).

Reimplemented from SoGroup.

◆ getPrimitiveCount()

void SoSwitch::getPrimitiveCount ( SoGetPrimitiveCountAction * action )

virtual

Action method for the SoGetPrimitiveCountAction.

Calculates the number of triangle, line segment and point primitives for the node and adds these to the counters of the action.

Nodes influencing how geometry nodes calculate their primitive count also override this method to change the relevant state variables.

Reimplemented from SoGroup.

◆ getTypeId()

SoType SoSwitch::getTypeId ( void ) const

virtual

Returns the type identification of an object derived from a class inheriting SoBase. This is used for runtime type checking and "downward" casting.

Reimplemented from SoGroup.

Reimplemented in SoBlinker.

◆ GLRender()

void SoSwitch::GLRender ( SoGLRenderAction * action )

virtual

Action method for the SoGLRenderAction.

This is called during rendering traversals. Nodes influencing the rendering state in any way or want to throw geometry primitives at OpenGL override this method.

Reimplemented from SoGroup.

◆ handleEvent()

void SoSwitch::handleEvent ( SoHandleEventAction * action )

virtual

Action method for SoHandleEventAction.

Inspects the event data from action, and processes it if it is something which this node should react to.

Nodes influencing relevant state variables for how event handling is done also override this method.

Reimplemented from SoGroup.

◆ notify()

void SoSwitch::notify ( SoNotList * l )

virtual

Notifies all auditors for this instance when changes are made.

Reimplemented from SoNode.

Reimplemented in SoBlinker.

◆ pick()

void SoSwitch::pick ( SoPickAction * action )

virtual

Action method for SoPickAction.

Does common processing for SoPickAction action instances.

Reimplemented from SoGroup.

◆ search()

void SoSwitch::search ( SoSearchAction * action )

virtual

Action method for SoSearchAction.

Compares the search criteria from the action to see if this node is a match. Searching is done by matching up all criteria set up in the SoSearchAction – if any of the requested criteria is a miss, the search is not deemed successful for the node.

See also: SoSearchAction

Reimplemented from SoGroup.

◆ traverseChildren()

void SoSwitch::traverseChildren ( SoAction * action )

protected

This function was part of the original SGI Inventor API, but it is not supported in Coin, as it looks like it should probably have been private in Inventor.

◆ write()

void SoSwitch::write ( SoWriteAction * action )

virtual

Action method for SoWriteAction.

Writes out a node object, and any connected nodes, engines etc, if necessary.

Reimplemented from SoGroup.

Reimplemented in SoBlinker.

Member Data Documentation

◆ whichChild

SoSFInt32 SoSwitch::whichChild

Selects which child to traverse during rendering (and some other) actions.

The value should be either SO_SWITCH_NONE (for traversing no children, like it was an empty SoGroup node), SO_SWITCH_ALL (for traversing like if we were an SoGroup node), SO_SWITCH_INHERIT (for traversing the same child as the last SoSwitch node), or an index value for a child.

When using SO_SWITCH_INHERIT, it is important to understand how the SoSwitch-node is affected by other SoSwitch-nodes. If you have several switches in the scene graph, the last switch with its whichChild field set to anything but SO_SWITCH_INHERIT will be used. The switch does not only inherit from its parent switch node, but also from its siblings, located anywhere before it in the scene graph. An example will help clarify this:

#Inventor V2.1 ascii
 
Separator {
  Switch {
    whichChild 0
 
    Group {
      Switch {
        whichChild 1
        BaseColor { rgb 1 0 0 } # red
        BaseColor { rgb 1 1 0 } # yellow
      }
      Switch {
        whichChild -2 # SO_SWITCH_INHERIT
        BaseColor { rgb 0 1 0 } # green
        BaseColor { rgb 0 0 1 } # blue
      }
      Cube { }
    }
  }
}

This results in a blue cube on the screen. The reason being that the value of the previous whichChild field was inherited by the final switch, making it select child 1 - the blue BaseColor.

When constructing ASCII Inventor files, the integer values for the keywords must be used instead of their names. They are -1 for SO_SWITCH_NONE, -2 for SO_SWITCH_INHERIT, and -3 for SO_SWITCH_ALL.

Default value for the field is SO_SWITCH_NONE.

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

SoSwitch.h
SoSwitch.cpp

Public Member Functions

Static Public Member Functions

Public Attributes

Protected Member Functions

Static Protected Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ SoSwitch() [1/2]

◆ SoSwitch() [2/2]

◆ ~SoSwitch()

Member Function Documentation

◆ affectsState()

◆ audioRender()

◆ callback()

◆ doAction()

◆ getBoundingBox()

◆ getClassTypeId()

◆ getFieldData()

◆ getFieldDataPtr()

◆ getMatrix()

◆ getPrimitiveCount()

◆ getTypeId()

◆ GLRender()

◆ handleEvent()

◆ notify()

◆ pick()

◆ search()

◆ traverseChildren()

◆ write()

Member Data Documentation

◆ whichChild