The SoNurbsProfile class is a node for specifying smooth profile curves. More...

#include <Inventor/nodes/SoNurbsProfile.h>

Inheritance diagram for SoNurbsProfile:

Public Member Functions
	SoNurbsProfile (void)

virtual void	getTrimCurve (SoState state, int32_t &numpoints, float &points, int &floatspervec, int32_t &numknots, float *&knotvector)

virtual SoType	getTypeId (void) const

virtual void	getVertices (SoState state, int32_t &numvertices, SbVec2f &vertices)

Public Member Functions inherited from SoProfile
virtual void	callback (SoCallbackAction *action)

virtual void	doAction (SoAction *action)

virtual void	getBoundingBox (SoGetBoundingBoxAction *action)

virtual void	getPrimitiveCount (SoGetPrimitiveCountAction *action)

virtual void	GLRender (SoGLRenderAction *action)

virtual void	pick (SoPickAction *action)

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

virtual SbBool	affectsState (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 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	notify (SoNotList *l)

virtual void	rayPick (SoRayPickAction *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)
	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 SoProfile
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
SoMFFloat	knotVector

Public Attributes inherited from SoProfile
SoMFInt32	index

SoSFEnum	linkage

Protected Member Functions
virtual	~SoNurbsProfile ()

virtual const SoFieldData *	getFieldData (void) const

Protected Member Functions inherited from SoProfile
	SoProfile (void)

virtual	~SoProfile ()

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 SoProfile
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 SoProfile
enum	Profile { START_FIRST = SoProfileElement::START_FIRST , START_NEW = SoProfileElement::START_NEW , ADD_TO_CURRENT = SoProfileElement::ADD_TO_CURRENT }

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 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 SoNurbsProfile class is a node for specifying smooth profile curves.

Use nodes of this type if you want to set up profiles that are smooth curves.

Use ProfileCoordinate2 for nonrational profile curves where weight is 1.0 (default), and ProfileCoordinate3 for rational profile curves to specify the weight. Weight is analogous to having magnets pulling on the curve.

A typical usage case for SoNurbsProfile is to specify NURBS trimming curves. For example:

#Inventor V2.1 ascii
 
ShapeHints {
  vertexOrdering COUNTERCLOCKWISE
}
 
Coordinate3 {
  point [ 
    -3 -3 -3, -3 -1 -3, -3 1 -3, -3 3 -3,
    -1 -3 -3, -1 -1  3, -1 1  3, -1 3 -3,
     1 -3 -3,  1 -1  3,  1 1  3,  1 3 -3,
     3 -3 -3,  3 -1 -3,  3 1 -3,  3 3 -3
   ]
}
 
ProfileCoordinate2 {
  point [ 0.0 0.0 ,
          0.75 0.0,
          0.75 0.75 ,
          0.25 0.75 ,
          0.0 0.0  ]
}
 
NurbsProfile {
   index [ 0 , 1 , 2 , 3, 4 ]
   linkage START_NEW
   knotVector [ 0, 0, 0, 0, 0.5, 1, 1, 1, 1 ]
}
 
NurbsSurface {
  numUControlPoints 4
  numVControlPoints 4
  uKnotVector [ 0.0, 0.0, 0.0, 0.0, 1.0, 1.0, 1.0, 1.0 ]
  vKnotVector [ 0.0, 0.0, 0.0, 0.0, 1.0, 1.0, 1.0, 1.0 ]
}

Rendering of Example Scenegraph

Note that the coordinates of the NurbsProfile live in the parametric space of the trimmed SoNurbsSurface, and that the same complexity setting (which is calculated based on the dimensions of the bounding box of the NurbsSurface) is used to determine the sampling tolerance both for the SoNurbsSurface and the SoNurbsProfile.

This means that if you want to change the tessellation of the trimming curve itself (i.e. increase or decrease the resolution of the boundaries of the "cut-out"), you should not change the SoComplexity setting but rather adapt the parametric scale in relation to the trimmed surface.

As an example, to increase the resolution of the curve in the above example, replace...

ProfileCoordinate2 {
  point [ 0.0 0.0, 0.75 0.0, 0.75 0.75, 0.25 0.75, 0.0 0.0 ]
}

.. with...

ProfileCoordinate2 {
  point [ 0.0 0.0, 7.5 0.0, 7.5 7.5, 2.5 7.5, 0.0 0.0 ]
}

and change the uKnotVector and vKnotVector of the NurbsSurface to be

uKnotVector [ 0.0, 0.0, 0.0, 0.0, 10, 10, 10, 10 ]

vKnotVector [ 0.0, 0.0, 0.0, 0.0, 10, 10, 10, 10 ]

However, keep in mind that increasing the accuracy of the trimming curve results in a much more complex tessellation of the trimmed surface. As a general rule of thumb, the extent of the trimming curve coordinates should never be greater than its "real" extents in relation to the trimmed surface, and often can be much lower.

If you find the above confusing, you probably do not want to use NURBS without reading up on the general concepts first. An explanation of NURBS is beyond the scope of the Coin documentation; for detailed information, refer to the specialized literature on the topic (for example "An Introduction to NURBS: With Historical Perspective" by David F. Rogers). A basic overview of curve and surface rendering using NURBS can also be found in chapter 8 of "The Inventor Mentor".

FILE FORMAT/DEFAULTS:

NurbsProfile {
    index 0
    linkage START_FIRST
    knotVector 0
}

Constructor & Destructor Documentation

◆ SoNurbsProfile()

SoNurbsProfile::SoNurbsProfile ( void )

Constructor.

◆ ~SoNurbsProfile()

SoNurbsProfile::~SoNurbsProfile ( )

protectedvirtual

Destructor.

Member Function Documentation

◆ getClassTypeId()

SoType SoNurbsProfile::getClassTypeId ( void )

static

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

◆ getFieldData()

const SoFieldData * SoNurbsProfile::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 SoProfile.

◆ getFieldDataPtr()

const SoFieldData ** SoNurbsProfile::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.

◆ getTrimCurve()

void SoNurbsProfile::getTrimCurve	(	SoState *	state,
		int32_t &	numpoints,
		float *&	points,
		int &	floatspervec,
		int32_t &	numknots,
		float *&	knotvector )

virtual

Return points and knotvector of the state.

Implements SoProfile.

◆ getTypeId()

SoType SoNurbsProfile::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 SoProfile.

◆ getVertices()

void SoNurbsProfile::getVertices	(	SoState *	state,
		int32_t &	numvertices,
		SbVec2f *&	vertices )

virtual

Return vertex set of state.

Implements SoProfile.

Member Data Documentation

◆ knotVector

SoMFFloat SoNurbsProfile::knotVector

Knot values for the NURBS curve.

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

SoNurbsProfile.h
SoNurbsProfile.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

◆ SoNurbsProfile()

◆ ~SoNurbsProfile()

Member Function Documentation

◆ getClassTypeId()

◆ getFieldData()

◆ getFieldDataPtr()

◆ getTrimCurve()

◆ getTypeId()

◆ getVertices()

Member Data Documentation

◆ knotVector