The SoText2 class is a node type for visualizing 2D text aligned with the camera plane. More...

#include <Inventor/nodes/SoText2.h>

Inheritance diagram for SoText2:

Public Types
enum	Justification { LEFT = 1 , RIGHT , CENTER }

Public Types inherited from SoShape
enum	TriangleShape { TRIANGLE_STRIP , TRIANGLE_FAN , TRIANGLES , POLYGON , QUADS , QUAD_STRIP , POINTS , LINES , LINE_STRIP }

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 }

Public Member Functions
	SoText2 (void)

virtual void	getPrimitiveCount (SoGetPrimitiveCountAction *action)

virtual SoType	getTypeId (void) const

virtual void	GLRender (SoGLRenderAction *action)

virtual void	rayPick (SoRayPickAction *action)

Public Member Functions inherited from SoShape
virtual SbBool	affectsState (void) const

virtual void	callback (SoCallbackAction *action)

virtual void	getBoundingBox (SoGetBoundingBoxAction *action)

const SoBoundingBoxCache *	getBoundingBoxCache (void) const

virtual void	notify (SoNotList *nl)

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

virtual void	audioRender (SoAudioRenderAction *action)

virtual SoNode *	copy (SbBool copyconnections=FALSE) const

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

virtual SoFieldContainer *	copyThroughConnection (void) const

virtual void	doAction (SoAction *action)

virtual SoChildList *	getChildren (void) const

virtual void	getMatrix (SoGetMatrixAction *action)

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)

virtual void	handleEvent (SoHandleEventAction *action)

SbBool	isOverride (void) const

virtual void	pick (SoPickAction *action)

virtual void	search (SoSearchAction *action)

void	setNodeType (const NodeType type)

void	setOverride (const SbBool state)

virtual void	startNotify (void)

virtual void	write (SoWriteAction *action)

virtual void	writeInstance (SoOutput *out)

Public Member Functions inherited from SoFieldContainer
virtual void	addWriteReference (SoOutput *out, SbBool isfromfield=FALSE)

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)

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

static float	getDecimatedComplexity (SoState *state, float complexity)

static void	getScreenSize (SoState *const state, const SbBox3f &boundingbox, SbVec2s &rectsize)

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
SoSFEnum	justification

SoSFFloat	spacing

SoMFString	string

Protected Member Functions
virtual	~SoText2 ()

virtual void	computeBBox (SoAction *action, SbBox3f &box, SbVec3f &center)

virtual void	generatePrimitives (SoAction *action)

virtual const SoFieldData *	getFieldData (void) const

Protected Member Functions inherited from SoShape
	SoShape (void)

virtual	~SoShape ()

void	beginShape (SoAction const action, const TriangleShape shapetype, SoDetail const detail=NULL)

void	beginSolidShape (SoGLRenderAction *action)

void	computeObjectSpaceRay (SoRayPickAction *const action)

void	computeObjectSpaceRay (SoRayPickAction *const action, const SbMatrix &matrix)

virtual SoDetail *	createLineSegmentDetail (SoRayPickAction action, const SoPrimitiveVertex v1, const SoPrimitiveVertex v2, SoPickedPoint pp)

virtual SoDetail *	createPointDetail (SoRayPickAction action, const SoPrimitiveVertex v, SoPickedPoint *pp)

virtual SoDetail *	createTriangleDetail (SoRayPickAction action, const SoPrimitiveVertex v1, const SoPrimitiveVertex v2, const SoPrimitiveVertex v3, SoPickedPoint *pp)

void	endShape (void)

void	endSolidShape (SoGLRenderAction *action)

void	finishVertexArray (SoGLRenderAction *action, const SbBool vbo, const SbBool normpervertex, const SbBool texpervertex, const SbBool colorpervertex)

void	generateVertex (SoPrimitiveVertex const pv, const SbVec3f &point, const SbBool useTexFunc, const SoMultiTextureCoordinateElement const tce, const float s, const float t, const float r, const SbVec3f &normal)

void	generateVertex (SoPrimitiveVertex const pv, const SbVec3f &point, const SbBool useTexFunc, const SoMultiTextureCoordinateElement const tce, const float s, const float t, const SbVec3f &normal)

float	getComplexityValue (SoAction *action)

void	GLRenderBoundingBox (SoGLRenderAction *action)

void	invokeLineSegmentCallbacks (SoAction const action, const SoPrimitiveVertex const v1, const SoPrimitiveVertex *const v2)

void	invokePointCallbacks (SoAction const action, const SoPrimitiveVertex const v)

void	invokeTriangleCallbacks (SoAction const action, const SoPrimitiveVertex const v1, const SoPrimitiveVertex const v2, const SoPrimitiveVertex const v3)

void	shapeVertex (const SoPrimitiveVertex *const v)

virtual SbBool	shouldGLRender (SoGLRenderAction *action)

SbBool	shouldPrimitiveCount (SoGetPrimitiveCountAction *action)

SbBool	shouldRayPick (SoRayPickAction *const action)

SbBool	startVertexArray (SoGLRenderAction action, const SoCoordinateElement coords, const SbVec3f *pervertexnormals, const SbBool texpervertex, const SbBool colorpervertex)

Protected Member Functions inherited from SoNode
	SoNode (void)

virtual	~SoNode ()

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

Protected Member Functions inherited from SoFieldContainer
	SoFieldContainer (void)

virtual	~SoFieldContainer ()

Protected Member Functions inherited from SoBase
	SoBase (void)

virtual	~SoBase ()

virtual SoNotRec	createNotRec (void)

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

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 SoText2 class is a node type for visualizing 2D text aligned with the camera plane.

SoText2 text is not scaled according to the distance from the camera, and is not influenced by rotation or scaling as 3D primitives are. If these are properties that you want the text to have, you should instead use an SoText3 or SoAsciiText node.

Note that even though the size of the 2D text is not influenced by the distance from the camera, the text is still subject to the usual rules with regard to the depth buffer, so it will be obscured by graphics laying in front of it.

The text will be positioned according to the current transformation. The x origin of the text is the first pixel of the leftmost character of the text. The y origin of the text is the baseline of the first line of text (the baseline being the imaginary line on which all upper case characters are standing).

The size of the fonts on screen is decided from the SoFont::size field of a preceding SoFont-node in the scene graph, which specifies the size in pixel dimensions. This value sets the approximate vertical dimension of the letters. The default value if no SoFont-nodes are used, is 10.

One important issue about rendering performance: since the positioning and rendering of an SoText2 node depends on the current viewport and camera, having SoText2 nodes in the scene graph will lead to a cache dependency on the previously encountered SoCamera-node. This can have severe influence on the rendering performance, since if the camera is above the SoText2's nearest parent SoSeparator, the SoSeparator will not be able to cache the geometry under it.

(Even worse rendering performance will be forced if the SoSeparator::renderCaching flag is explicitly set to ON, as the SoSeparator node will then continuously generate and destruct the same cache as the camera moves.)

SoText2 nodes are therefore best positioned under their own SoSeparator node, outside areas in the scene graph that otherwise contains static geometry.

Also note that SoText2 nodes cache the ids and positions of each glyph bitmap used to render string. This means that USE of a DEF'ed SoText2 node, with a different font, will be noticeably slower than using two separate SoText2 nodes, one for each font, since it will have to recalculate glyph bitmap ids and positions for each call to GLrender().

SoScale nodes cannot be used to influence the dimensions of the rendering output of SoText2 nodes.

FILE FORMAT/DEFAULTS:

Text2 {
    string ""
    spacing 1
    justification LEFT
}

See also: SoFont, SoFontStyle, SoText3, SoAsciiText

Member Enumeration Documentation

◆ Justification

enum SoText2::Justification

Used to specify horizontal string alignment.

Enumerator
LEFT	Left edges of strings are aligned.
RIGHT	Right edges of strings are aligned.
CENTER	Centers of strings are aligned.

Constructor & Destructor Documentation

◆ SoText2()

SoText2::SoText2 ( void )

Constructor.

◆ ~SoText2()

SoText2::~SoText2 ( )

protectedvirtual

Destructor.

Member Function Documentation

◆ computeBBox()

void SoText2::computeBBox	(	SoAction *	action,
		SbBox3f &	box,
		SbVec3f &	center )

protectedvirtual

Implemented by SoShape subclasses to let the SoShape superclass know the exact size and weighted center point of the shape's bounding box.

The bounding box and center point should be calculated and returned in the local coordinate system.

The method implements action behavior for shape nodes for SoGetBoundingBoxAction. It is invoked from SoShape::getBoundingBox(). (Subclasses should not override SoNode::getBoundingBox().)

The box parameter sent in is guaranteed to be an empty box, while center is undefined upon function entry.

Implements SoShape.

◆ generatePrimitives()

void SoText2::generatePrimitives ( SoAction * action )

protectedvirtual

The method implements action behavior for shape nodes for SoCallbackAction. It is invoked from SoShape::callback(). (Subclasses should not override SoNode::callback().)

The subclass implementations uses the convenience methods SoShape::beginShape(), SoShape::shapeVertex(), and SoShape::endShape(), with SoDetail instances, to pass the primitives making up the shape back to the caller.

Implements SoShape.

◆ getClassTypeId()

SoType SoText2::getClassTypeId ( void )

static

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

◆ getFieldData()

const SoFieldData * SoText2::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 SoShape.

◆ getFieldDataPtr()

const SoFieldData ** SoText2::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.

◆ getPrimitiveCount()

void SoText2::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 SoShape.

◆ getTypeId()

SoType SoText2::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 SoShape.

◆ GLRender()

void SoText2::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 SoShape.

◆ initClass()

void SoText2::initClass ( void )

static

◆ rayPick()

void SoText2::rayPick ( SoRayPickAction * action )

virtual

Calculates picked point based on primitives generated by subclasses.

Reimplemented from SoShape.

Member Data Documentation

◆ justification

SoSFEnum SoText2::justification

Determines horizontal alignment of text strings.

If justification is set to SoText2::LEFT, the left edge of the first string is at the origin and all strings are aligned with their left edges. If set to SoText2::RIGHT, the right edge of the first string is at the origin and all strings are aligned with their right edges. Otherwise, if set to SoText2::CENTER, the center of the first string is at the origin and all strings are aligned with their centers. The origin is always located at the baseline of the first line of text.

Default value is SoText2::LEFT.

◆ spacing

SoSFFloat SoText2::spacing

Vertical spacing between the baselines of two consecutive horizontal lines. Default value is 1.0, which means that it is equal to the vertical size of the highest character in the bitmap alphabet.

◆ string

SoMFString SoText2::string

The set of strings to render. Each string in the multiple value field will be rendered on a separate line.

The default value of the field is a single empty string.

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

SoText2.h
SoText2.cpp

Public Types

Public Member Functions

Static Public Member Functions

Public Attributes

Protected Member Functions

Static Protected Member Functions

Additional Inherited Members

Detailed Description

Member Enumeration Documentation

◆ Justification

Constructor & Destructor Documentation

◆ SoText2()

◆ ~SoText2()

Member Function Documentation

◆ computeBBox()

◆ generatePrimitives()

◆ getClassTypeId()

◆ getFieldData()

◆ getFieldDataPtr()

◆ getPrimitiveCount()

◆ getTypeId()

◆ GLRender()

◆ initClass()

◆ rayPick()

Member Data Documentation

◆ justification

◆ spacing

◆ string